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moondream/lib/python3.10/site-packages/matplotlib/__init__.py

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+"""
+An object-oriented plotting library.
+
+A procedural interface is provided by the companion pyplot module,
+which may be imported directly, e.g.::
+
+    import matplotlib.pyplot as plt
+
+or using ipython::
+
+    ipython
+
+at your terminal, followed by::
+
+    In [1]: %matplotlib
+    In [2]: import matplotlib.pyplot as plt
+
+at the ipython shell prompt.
+
+For the most part, direct use of the explicit object-oriented library is
+encouraged when programming; the implicit pyplot interface is primarily for
+working interactively. The exceptions to this suggestion are the pyplot
+functions `.pyplot.figure`, `.pyplot.subplot`, `.pyplot.subplots`, and
+`.pyplot.savefig`, which can greatly simplify scripting.  See
+:ref:`api_interfaces` for an explanation of the tradeoffs between the implicit
+and explicit interfaces.
+
+Modules include:
+
+:mod:`matplotlib.axes`
+    The `~.axes.Axes` class.  Most pyplot functions are wrappers for
+    `~.axes.Axes` methods.  The axes module is the highest level of OO
+    access to the library.
+
+:mod:`matplotlib.figure`
+    The `.Figure` class.
+
+:mod:`matplotlib.artist`
+    The `.Artist` base class for all classes that draw things.
+
+:mod:`matplotlib.lines`
+    The `.Line2D` class for drawing lines and markers.
+
+:mod:`matplotlib.patches`
+    Classes for drawing polygons.
+
+:mod:`matplotlib.text`
+    The `.Text` and `.Annotation` classes.
+
+:mod:`matplotlib.image`
+    The `.AxesImage` and `.FigureImage` classes.
+
+:mod:`matplotlib.collections`
+    Classes for efficient drawing of groups of lines or polygons.
+
+:mod:`matplotlib.colors`
+    Color specifications and making colormaps.
+
+:mod:`matplotlib.cm`
+    Colormaps, and the `.ScalarMappable` mixin class for providing color
+    mapping functionality to other classes.
+
+:mod:`matplotlib.ticker`
+    Calculation of tick mark locations and formatting of tick labels.
+
+:mod:`matplotlib.backends`
+    A subpackage with modules for various GUI libraries and output formats.
+
+The base matplotlib namespace includes:
+
+`~matplotlib.rcParams`
+    Default configuration settings; their defaults may be overridden using
+    a :file:`matplotlibrc` file.
+
+`~matplotlib.use`
+    Setting the Matplotlib backend.  This should be called before any
+    figure is created, because it is not possible to switch between
+    different GUI backends after that.
+
+The following environment variables can be used to customize the behavior:
+
+:envvar:`MPLBACKEND`
+    This optional variable can be set to choose the Matplotlib backend. See
+    :ref:`what-is-a-backend`.
+
+:envvar:`MPLCONFIGDIR`
+    This is the directory used to store user customizations to
+    Matplotlib, as well as some caches to improve performance. If
+    :envvar:`MPLCONFIGDIR` is not defined, :file:`{HOME}/.config/matplotlib`
+    and :file:`{HOME}/.cache/matplotlib` are used on Linux, and
+    :file:`{HOME}/.matplotlib` on other platforms, if they are
+    writable. Otherwise, the Python standard library's `tempfile.gettempdir`
+    is used to find a base directory in which the :file:`matplotlib`
+    subdirectory is created.
+
+Matplotlib was initially written by John D. Hunter (1968-2012) and is now
+developed and maintained by a host of others.
+
+Occasionally the internal documentation (python docstrings) will refer
+to MATLAB®, a registered trademark of The MathWorks, Inc.
+
+"""
+
+__all__ = [
+    "__bibtex__",
+    "__version__",
+    "__version_info__",
+    "set_loglevel",
+    "ExecutableNotFoundError",
+    "get_configdir",
+    "get_cachedir",
+    "get_data_path",
+    "matplotlib_fname",
+    "MatplotlibDeprecationWarning",
+    "RcParams",
+    "rc_params",
+    "rc_params_from_file",
+    "rcParamsDefault",
+    "rcParams",
+    "rcParamsOrig",
+    "defaultParams",
+    "rc",
+    "rcdefaults",
+    "rc_file_defaults",
+    "rc_file",
+    "rc_context",
+    "use",
+    "get_backend",
+    "interactive",
+    "is_interactive",
+    "colormaps",
+    "multivar_colormaps",
+    "bivar_colormaps",
+    "color_sequences",
+]
+
+
+import atexit
+from collections import namedtuple
+from collections.abc import MutableMapping
+import contextlib
+import functools
+import importlib
+import inspect
+from inspect import Parameter
+import locale
+import logging
+import os
+from pathlib import Path
+import pprint
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+
+from packaging.version import parse as parse_version
+
+# cbook must import matplotlib only within function
+# definitions, so it is safe to import from it here.
+from . import _api, _version, cbook, _docstring, rcsetup
+from matplotlib._api import MatplotlibDeprecationWarning
+from matplotlib.rcsetup import cycler  # noqa: F401
+
+
+_log = logging.getLogger(__name__)
+
+__bibtex__ = r"""@Article{Hunter:2007,
+  Author    = {Hunter, J. D.},
+  Title     = {Matplotlib: A 2D graphics environment},
+  Journal   = {Computing in Science \& Engineering},
+  Volume    = {9},
+  Number    = {3},
+  Pages     = {90--95},
+  abstract  = {Matplotlib is a 2D graphics package used for Python
+  for application development, interactive scripting, and
+  publication-quality image generation across user
+  interfaces and operating systems.},
+  publisher = {IEEE COMPUTER SOC},
+  year      = 2007
+}"""
+
+# modelled after sys.version_info
+_VersionInfo = namedtuple('_VersionInfo',
+                          'major, minor, micro, releaselevel, serial')
+
+
+def _parse_to_version_info(version_str):
+    """
+    Parse a version string to a namedtuple analogous to sys.version_info.
+
+    See:
+    https://packaging.pypa.io/en/latest/version.html#packaging.version.parse
+    https://docs.python.org/3/library/sys.html#sys.version_info
+    """
+    v = parse_version(version_str)
+    if v.pre is None and v.post is None and v.dev is None:
+        return _VersionInfo(v.major, v.minor, v.micro, 'final', 0)
+    elif v.dev is not None:
+        return _VersionInfo(v.major, v.minor, v.micro, 'alpha', v.dev)
+    elif v.pre is not None:
+        releaselevel = {
+            'a': 'alpha',
+            'b': 'beta',
+            'rc': 'candidate'}.get(v.pre[0], 'alpha')
+        return _VersionInfo(v.major, v.minor, v.micro, releaselevel, v.pre[1])
+    else:
+        # fallback for v.post: guess-next-dev scheme from setuptools_scm
+        return _VersionInfo(v.major, v.minor, v.micro + 1, 'alpha', v.post)
+
+
+def _get_version():
+    """Return the version string used for __version__."""
+    # Only shell out to a git subprocess if really needed, i.e. when we are in
+    # a matplotlib git repo but not in a shallow clone, such as those used by
+    # CI, as the latter would trigger a warning from setuptools_scm.
+    root = Path(__file__).resolve().parents[2]
+    if ((root / ".matplotlib-repo").exists()
+            and (root / ".git").exists()
+            and not (root / ".git/shallow").exists()):
+        try:
+            import setuptools_scm
+        except ImportError:
+            pass
+        else:
+            return setuptools_scm.get_version(
+                root=root,
+                dist_name="matplotlib",
+                version_scheme="release-branch-semver",
+                local_scheme="node-and-date",
+                fallback_version=_version.version,
+            )
+    # Get the version from the _version.py file if not in repo or setuptools_scm is
+    # unavailable.
+    return _version.version
+
+
+@_api.caching_module_getattr
+class __getattr__:
+    __version__ = property(lambda self: _get_version())
+    __version_info__ = property(
+        lambda self: _parse_to_version_info(self.__version__))
+
+
+def _check_versions():
+
+    # Quickfix to ensure Microsoft Visual C++ redistributable
+    # DLLs are loaded before importing kiwisolver
+    from . import ft2font  # noqa: F401
+
+    for modname, minver in [
+            ("cycler", "0.10"),
+            ("dateutil", "2.7"),
+            ("kiwisolver", "1.3.1"),
+            ("numpy", "1.23"),
+            ("pyparsing", "2.3.1"),
+    ]:
+        module = importlib.import_module(modname)
+        if parse_version(module.__version__) < parse_version(minver):
+            raise ImportError(f"Matplotlib requires {modname}>={minver}; "
+                              f"you have {module.__version__}")
+
+
+_check_versions()
+
+
+# The decorator ensures this always returns the same handler (and it is only
+# attached once).
+@functools.cache
+def _ensure_handler():
+    """
+    The first time this function is called, attach a `StreamHandler` using the
+    same format as `logging.basicConfig` to the Matplotlib root logger.
+
+    Return this handler every time this function is called.
+    """
+    handler = logging.StreamHandler()
+    handler.setFormatter(logging.Formatter(logging.BASIC_FORMAT))
+    _log.addHandler(handler)
+    return handler
+
+
+def set_loglevel(level):
+    """
+    Configure Matplotlib's logging levels.
+
+    Matplotlib uses the standard library `logging` framework under the root
+    logger 'matplotlib'.  This is a helper function to:
+
+    - set Matplotlib's root logger level
+    - set the root logger handler's level, creating the handler
+      if it does not exist yet
+
+    Typically, one should call ``set_loglevel("info")`` or
+    ``set_loglevel("debug")`` to get additional debugging information.
+
+    Users or applications that are installing their own logging handlers
+    may want to directly manipulate ``logging.getLogger('matplotlib')`` rather
+    than use this function.
+
+    Parameters
+    ----------
+    level : {"notset", "debug", "info", "warning", "error", "critical"}
+        The log level of the handler.
+
+    Notes
+    -----
+    The first time this function is called, an additional handler is attached
+    to Matplotlib's root handler; this handler is reused every time and this
+    function simply manipulates the logger and handler's level.
+
+    """
+    _log.setLevel(level.upper())
+    _ensure_handler().setLevel(level.upper())
+
+
+def _logged_cached(fmt, func=None):
+    """
+    Decorator that logs a function's return value, and memoizes that value.
+
+    After ::
+
+        @_logged_cached(fmt)
+        def func(): ...
+
+    the first call to *func* will log its return value at the DEBUG level using
+    %-format string *fmt*, and memoize it; later calls to *func* will directly
+    return that value.
+    """
+    if func is None:  # Return the actual decorator.
+        return functools.partial(_logged_cached, fmt)
+
+    called = False
+    ret = None
+
+    @functools.wraps(func)
+    def wrapper(**kwargs):
+        nonlocal called, ret
+        if not called:
+            ret = func(**kwargs)
+            called = True
+            _log.debug(fmt, ret)
+        return ret
+
+    return wrapper
+
+
+_ExecInfo = namedtuple("_ExecInfo", "executable raw_version version")
+
+
+class ExecutableNotFoundError(FileNotFoundError):
+    """
+    Error raised when an executable that Matplotlib optionally
+    depends on can't be found.
+    """
+    pass
+
+
+@functools.cache
+def _get_executable_info(name):
+    """
+    Get the version of some executable that Matplotlib optionally depends on.
+
+    .. warning::
+       The list of executables that this function supports is set according to
+       Matplotlib's internal needs, and may change without notice.
+
+    Parameters
+    ----------
+    name : str
+        The executable to query.  The following values are currently supported:
+        "dvipng", "gs", "inkscape", "magick", "pdftocairo", "pdftops".  This
+        list is subject to change without notice.
+
+    Returns
+    -------
+    tuple
+        A namedtuple with fields ``executable`` (`str`) and ``version``
+        (`packaging.Version`, or ``None`` if the version cannot be determined).
+
+    Raises
+    ------
+    ExecutableNotFoundError
+        If the executable is not found or older than the oldest version
+        supported by Matplotlib.  For debugging purposes, it is also
+        possible to "hide" an executable from Matplotlib by adding it to the
+        :envvar:`_MPLHIDEEXECUTABLES` environment variable (a comma-separated
+        list), which must be set prior to any calls to this function.
+    ValueError
+        If the executable is not one that we know how to query.
+    """
+
+    def impl(args, regex, min_ver=None, ignore_exit_code=False):
+        # Execute the subprocess specified by args; capture stdout and stderr.
+        # Search for a regex match in the output; if the match succeeds, the
+        # first group of the match is the version.
+        # Return an _ExecInfo if the executable exists, and has a version of
+        # at least min_ver (if set); else, raise ExecutableNotFoundError.
+        try:
+            output = subprocess.check_output(
+                args, stderr=subprocess.STDOUT,
+                text=True, errors="replace")
+        except subprocess.CalledProcessError as _cpe:
+            if ignore_exit_code:
+                output = _cpe.output
+            else:
+                raise ExecutableNotFoundError(str(_cpe)) from _cpe
+        except OSError as _ose:
+            raise ExecutableNotFoundError(str(_ose)) from _ose
+        match = re.search(regex, output)
+        if match:
+            raw_version = match.group(1)
+            version = parse_version(raw_version)
+            if min_ver is not None and version < parse_version(min_ver):
+                raise ExecutableNotFoundError(
+                    f"You have {args[0]} version {version} but the minimum "
+                    f"version supported by Matplotlib is {min_ver}")
+            return _ExecInfo(args[0], raw_version, version)
+        else:
+            raise ExecutableNotFoundError(
+                f"Failed to determine the version of {args[0]} from "
+                f"{' '.join(args)}, which output {output}")
+
+    if name in os.environ.get("_MPLHIDEEXECUTABLES", "").split(","):
+        raise ExecutableNotFoundError(f"{name} was hidden")
+
+    if name == "dvipng":
+        return impl(["dvipng", "-version"], "(?m)^dvipng(?: .*)? (.+)", "1.6")
+    elif name == "gs":
+        execs = (["gswin32c", "gswin64c", "mgs", "gs"]  # "mgs" for miktex.
+                 if sys.platform == "win32" else
+                 ["gs"])
+        for e in execs:
+            try:
+                return impl([e, "--version"], "(.*)", "9")
+            except ExecutableNotFoundError:
+                pass
+        message = "Failed to find a Ghostscript installation"
+        raise ExecutableNotFoundError(message)
+    elif name == "inkscape":
+        try:
+            # Try headless option first (needed for Inkscape version < 1.0):
+            return impl(["inkscape", "--without-gui", "-V"],
+                        "Inkscape ([^ ]*)")
+        except ExecutableNotFoundError:
+            pass  # Suppress exception chaining.
+        # If --without-gui is not accepted, we may be using Inkscape >= 1.0 so
+        # try without it:
+        return impl(["inkscape", "-V"], "Inkscape ([^ ]*)")
+    elif name == "magick":
+        if sys.platform == "win32":
+            # Check the registry to avoid confusing ImageMagick's convert with
+            # Windows's builtin convert.exe.
+            import winreg
+            binpath = ""
+            for flag in [0, winreg.KEY_WOW64_32KEY, winreg.KEY_WOW64_64KEY]:
+                try:
+                    with winreg.OpenKeyEx(
+                            winreg.HKEY_LOCAL_MACHINE,
+                            r"Software\Imagemagick\Current",
+                            0, winreg.KEY_QUERY_VALUE | flag) as hkey:
+                        binpath = winreg.QueryValueEx(hkey, "BinPath")[0]
+                except OSError:
+                    pass
+            path = None
+            if binpath:
+                for name in ["convert.exe", "magick.exe"]:
+                    candidate = Path(binpath, name)
+                    if candidate.exists():
+                        path = str(candidate)
+                        break
+            if path is None:
+                raise ExecutableNotFoundError(
+                    "Failed to find an ImageMagick installation")
+        else:
+            path = "convert"
+        info = impl([path, "--version"], r"^Version: ImageMagick (\S*)")
+        if info.raw_version == "7.0.10-34":
+            # https://github.com/ImageMagick/ImageMagick/issues/2720
+            raise ExecutableNotFoundError(
+                f"You have ImageMagick {info.version}, which is unsupported")
+        return info
+    elif name == "pdftocairo":
+        return impl(["pdftocairo", "-v"], "pdftocairo version (.*)")
+    elif name == "pdftops":
+        info = impl(["pdftops", "-v"], "^pdftops version (.*)",
+                    ignore_exit_code=True)
+        if info and not (
+                3 <= info.version.major or
+                # poppler version numbers.
+                parse_version("0.9") <= info.version < parse_version("1.0")):
+            raise ExecutableNotFoundError(
+                f"You have pdftops version {info.version} but the minimum "
+                f"version supported by Matplotlib is 3.0")
+        return info
+    else:
+        raise ValueError(f"Unknown executable: {name!r}")
+
+
+def _get_xdg_config_dir():
+    """
+    Return the XDG configuration directory, according to the XDG base
+    directory spec:
+
+    https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
+    """
+    return os.environ.get('XDG_CONFIG_HOME') or str(Path.home() / ".config")
+
+
+def _get_xdg_cache_dir():
+    """
+    Return the XDG cache directory, according to the XDG base directory spec:
+
+    https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
+    """
+    return os.environ.get('XDG_CACHE_HOME') or str(Path.home() / ".cache")
+
+
+def _get_config_or_cache_dir(xdg_base_getter):
+    configdir = os.environ.get('MPLCONFIGDIR')
+    if configdir:
+        configdir = Path(configdir)
+    elif sys.platform.startswith(('linux', 'freebsd')):
+        # Only call _xdg_base_getter here so that MPLCONFIGDIR is tried first,
+        # as _xdg_base_getter can throw.
+        configdir = Path(xdg_base_getter(), "matplotlib")
+    else:
+        configdir = Path.home() / ".matplotlib"
+    # Resolve the path to handle potential issues with inaccessible symlinks.
+    configdir = configdir.resolve()
+    try:
+        configdir.mkdir(parents=True, exist_ok=True)
+    except OSError as exc:
+        _log.warning("mkdir -p failed for path %s: %s", configdir, exc)
+    else:
+        if os.access(str(configdir), os.W_OK) and configdir.is_dir():
+            return str(configdir)
+        _log.warning("%s is not a writable directory", configdir)
+    # If the config or cache directory cannot be created or is not a writable
+    # directory, create a temporary one.
+    try:
+        tmpdir = tempfile.mkdtemp(prefix="matplotlib-")
+    except OSError as exc:
+        raise OSError(
+            f"Matplotlib requires access to a writable cache directory, but there "
+            f"was an issue with the default path ({configdir}), and a temporary "
+            f"directory could not be created; set the MPLCONFIGDIR environment "
+            f"variable to a writable directory") from exc
+    os.environ["MPLCONFIGDIR"] = tmpdir
+    atexit.register(shutil.rmtree, tmpdir)
+    _log.warning(
+        "Matplotlib created a temporary cache directory at %s because there was "
+        "an issue with the default path (%s); it is highly recommended to set the "
+        "MPLCONFIGDIR environment variable to a writable directory, in particular to "
+        "speed up the import of Matplotlib and to better support multiprocessing.",
+        tmpdir, configdir)
+    return tmpdir
+
+
+@_logged_cached('CONFIGDIR=%s')
+def get_configdir():
+    """
+    Return the string path of the configuration directory.
+
+    The directory is chosen as follows:
+
+    1. If the MPLCONFIGDIR environment variable is supplied, choose that.
+    2. On Linux, follow the XDG specification and look first in
+       ``$XDG_CONFIG_HOME``, if defined, or ``$HOME/.config``.  On other
+       platforms, choose ``$HOME/.matplotlib``.
+    3. If the chosen directory exists and is writable, use that as the
+       configuration directory.
+    4. Else, create a temporary directory, and use it as the configuration
+       directory.
+    """
+    return _get_config_or_cache_dir(_get_xdg_config_dir)
+
+
+@_logged_cached('CACHEDIR=%s')
+def get_cachedir():
+    """
+    Return the string path of the cache directory.
+
+    The procedure used to find the directory is the same as for
+    `get_configdir`, except using ``$XDG_CACHE_HOME``/``$HOME/.cache`` instead.
+    """
+    return _get_config_or_cache_dir(_get_xdg_cache_dir)
+
+
+@_logged_cached('matplotlib data path: %s')
+def get_data_path():
+    """Return the path to Matplotlib data."""
+    return str(Path(__file__).with_name("mpl-data"))
+
+
+def matplotlib_fname():
+    """
+    Get the location of the config file.
+
+    The file location is determined in the following order
+
+    - ``$PWD/matplotlibrc``
+    - ``$MATPLOTLIBRC`` if it is not a directory
+    - ``$MATPLOTLIBRC/matplotlibrc``
+    - ``$MPLCONFIGDIR/matplotlibrc``
+    - On Linux,
+        - ``$XDG_CONFIG_HOME/matplotlib/matplotlibrc`` (if ``$XDG_CONFIG_HOME``
+          is defined)
+        - or ``$HOME/.config/matplotlib/matplotlibrc`` (if ``$XDG_CONFIG_HOME``
+          is not defined)
+    - On other platforms,
+      - ``$HOME/.matplotlib/matplotlibrc`` if ``$HOME`` is defined
+    - Lastly, it looks in ``$MATPLOTLIBDATA/matplotlibrc``, which should always
+      exist.
+    """
+
+    def gen_candidates():
+        # rely on down-stream code to make absolute.  This protects us
+        # from having to directly get the current working directory
+        # which can fail if the user has ended up with a cwd that is
+        # non-existent.
+        yield 'matplotlibrc'
+        try:
+            matplotlibrc = os.environ['MATPLOTLIBRC']
+        except KeyError:
+            pass
+        else:
+            yield matplotlibrc
+            yield os.path.join(matplotlibrc, 'matplotlibrc')
+        yield os.path.join(get_configdir(), 'matplotlibrc')
+        yield os.path.join(get_data_path(), 'matplotlibrc')
+
+    for fname in gen_candidates():
+        if os.path.exists(fname) and not os.path.isdir(fname):
+            return fname
+
+    raise RuntimeError("Could not find matplotlibrc file; your Matplotlib "
+                       "install is broken")
+
+
+# rcParams deprecated and automatically mapped to another key.
+# Values are tuples of (version, new_name, f_old2new, f_new2old).
+_deprecated_map = {}
+# rcParams deprecated; some can manually be mapped to another key.
+# Values are tuples of (version, new_name_or_None).
+_deprecated_ignore_map = {}
+# rcParams deprecated; can use None to suppress warnings; remain actually
+# listed in the rcParams.
+# Values are tuples of (version,)
+_deprecated_remain_as_none = {}
+
+
+@_docstring.Substitution(
+    "\n".join(map("- {}".format, sorted(rcsetup._validators, key=str.lower)))
+)
+class RcParams(MutableMapping, dict):
+    """
+    A dict-like key-value store for config parameters, including validation.
+
+    Validating functions are defined and associated with rc parameters in
+    :mod:`matplotlib.rcsetup`.
+
+    The list of rcParams is:
+
+    %s
+
+    See Also
+    --------
+    :ref:`customizing-with-matplotlibrc-files`
+    """
+
+    validate = rcsetup._validators
+
+    # validate values on the way in
+    def __init__(self, *args, **kwargs):
+        self.update(*args, **kwargs)
+
+    def _set(self, key, val):
+        """
+        Directly write data bypassing deprecation and validation logic.
+
+        Notes
+        -----
+        As end user or downstream library you almost always should use
+        ``rcParams[key] = val`` and not ``_set()``.
+
+        There are only very few special cases that need direct data access.
+        These cases previously used ``dict.__setitem__(rcParams, key, val)``,
+        which is now deprecated and replaced by ``rcParams._set(key, val)``.
+
+        Even though private, we guarantee API stability for ``rcParams._set``,
+        i.e. it is subject to Matplotlib's API and deprecation policy.
+
+        :meta public:
+        """
+        dict.__setitem__(self, key, val)
+
+    def _get(self, key):
+        """
+        Directly read data bypassing deprecation, backend and validation
+        logic.
+
+        Notes
+        -----
+        As end user or downstream library you almost always should use
+        ``val = rcParams[key]`` and not ``_get()``.
+
+        There are only very few special cases that need direct data access.
+        These cases previously used ``dict.__getitem__(rcParams, key, val)``,
+        which is now deprecated and replaced by ``rcParams._get(key)``.
+
+        Even though private, we guarantee API stability for ``rcParams._get``,
+        i.e. it is subject to Matplotlib's API and deprecation policy.
+
+        :meta public:
+        """
+        return dict.__getitem__(self, key)
+
+    def _update_raw(self, other_params):
+        """
+        Directly update the data from *other_params*, bypassing deprecation,
+        backend and validation logic on both sides.
+
+        This ``rcParams._update_raw(params)`` replaces the previous pattern
+        ``dict.update(rcParams, params)``.
+
+        Parameters
+        ----------
+        other_params : dict or `.RcParams`
+            The input mapping from which to update.
+        """
+        if isinstance(other_params, RcParams):
+            other_params = dict.items(other_params)
+        dict.update(self, other_params)
+
+    def _ensure_has_backend(self):
+        """
+        Ensure that a "backend" entry exists.
+
+        Normally, the default matplotlibrc file contains *no* entry for "backend" (the
+        corresponding line starts with ##, not #; we fill in _auto_backend_sentinel
+        in that case.  However, packagers can set a different default backend
+        (resulting in a normal `#backend: foo` line) in which case we should *not*
+        fill in _auto_backend_sentinel.
+        """
+        dict.setdefault(self, "backend", rcsetup._auto_backend_sentinel)
+
+    def __setitem__(self, key, val):
+        try:
+            if key in _deprecated_map:
+                version, alt_key, alt_val, inverse_alt = _deprecated_map[key]
+                _api.warn_deprecated(
+                    version, name=key, obj_type="rcparam", alternative=alt_key)
+                key = alt_key
+                val = alt_val(val)
+            elif key in _deprecated_remain_as_none and val is not None:
+                version, = _deprecated_remain_as_none[key]
+                _api.warn_deprecated(version, name=key, obj_type="rcparam")
+            elif key in _deprecated_ignore_map:
+                version, alt_key = _deprecated_ignore_map[key]
+                _api.warn_deprecated(
+                    version, name=key, obj_type="rcparam", alternative=alt_key)
+                return
+            elif key == 'backend':
+                if val is rcsetup._auto_backend_sentinel:
+                    if 'backend' in self:
+                        return
+            try:
+                cval = self.validate[key](val)
+            except ValueError as ve:
+                raise ValueError(f"Key {key}: {ve}") from None
+            self._set(key, cval)
+        except KeyError as err:
+            raise KeyError(
+                f"{key} is not a valid rc parameter (see rcParams.keys() for "
+                f"a list of valid parameters)") from err
+
+    def __getitem__(self, key):
+        if key in _deprecated_map:
+            version, alt_key, alt_val, inverse_alt = _deprecated_map[key]
+            _api.warn_deprecated(
+                version, name=key, obj_type="rcparam", alternative=alt_key)
+            return inverse_alt(self._get(alt_key))
+
+        elif key in _deprecated_ignore_map:
+            version, alt_key = _deprecated_ignore_map[key]
+            _api.warn_deprecated(
+                version, name=key, obj_type="rcparam", alternative=alt_key)
+            return self._get(alt_key) if alt_key else None
+
+        # In theory, this should only ever be used after the global rcParams
+        # has been set up, but better be safe e.g. in presence of breakpoints.
+        elif key == "backend" and self is globals().get("rcParams"):
+            val = self._get(key)
+            if val is rcsetup._auto_backend_sentinel:
+                from matplotlib import pyplot as plt
+                plt.switch_backend(rcsetup._auto_backend_sentinel)
+
+        return self._get(key)
+
+    def _get_backend_or_none(self):
+        """Get the requested backend, if any, without triggering resolution."""
+        backend = self._get("backend")
+        return None if backend is rcsetup._auto_backend_sentinel else backend
+
+    def __repr__(self):
+        class_name = self.__class__.__name__
+        indent = len(class_name) + 1
+        with _api.suppress_matplotlib_deprecation_warning():
+            repr_split = pprint.pformat(dict(self), indent=1,
+                                        width=80 - indent).split('\n')
+        repr_indented = ('\n' + ' ' * indent).join(repr_split)
+        return f'{class_name}({repr_indented})'
+
+    def __str__(self):
+        return '\n'.join(map('{0[0]}: {0[1]}'.format, sorted(self.items())))
+
+    def __iter__(self):
+        """Yield sorted list of keys."""
+        with _api.suppress_matplotlib_deprecation_warning():
+            yield from sorted(dict.__iter__(self))
+
+    def __len__(self):
+        return dict.__len__(self)
+
+    def find_all(self, pattern):
+        """
+        Return the subset of this RcParams dictionary whose keys match,
+        using :func:`re.search`, the given ``pattern``.
+
+        .. note::
+
+            Changes to the returned dictionary are *not* propagated to
+            the parent RcParams dictionary.
+
+        """
+        pattern_re = re.compile(pattern)
+        return RcParams((key, value)
+                        for key, value in self.items()
+                        if pattern_re.search(key))
+
+    def copy(self):
+        """Copy this RcParams instance."""
+        rccopy = RcParams()
+        for k in self:  # Skip deprecations and revalidation.
+            rccopy._set(k, self._get(k))
+        return rccopy
+
+
+def rc_params(fail_on_error=False):
+    """Construct a `RcParams` instance from the default Matplotlib rc file."""
+    return rc_params_from_file(matplotlib_fname(), fail_on_error)
+
+
+@functools.cache
+def _get_ssl_context():
+    try:
+        import certifi
+    except ImportError:
+        _log.debug("Could not import certifi.")
+        return None
+    import ssl
+    return ssl.create_default_context(cafile=certifi.where())
+
+
+@contextlib.contextmanager
+def _open_file_or_url(fname):
+    if (isinstance(fname, str)
+            and fname.startswith(('http://', 'https://', 'ftp://', 'file:'))):
+        import urllib.request
+        ssl_ctx = _get_ssl_context()
+        if ssl_ctx is None:
+            _log.debug(
+                "Could not get certifi ssl context, https may not work."
+            )
+        with urllib.request.urlopen(fname, context=ssl_ctx) as f:
+            yield (line.decode('utf-8') for line in f)
+    else:
+        fname = os.path.expanduser(fname)
+        with open(fname, encoding='utf-8') as f:
+            yield f
+
+
+def _rc_params_in_file(fname, transform=lambda x: x, fail_on_error=False):
+    """
+    Construct a `RcParams` instance from file *fname*.
+
+    Unlike `rc_params_from_file`, the configuration class only contains the
+    parameters specified in the file (i.e. default values are not filled in).
+
+    Parameters
+    ----------
+    fname : path-like
+        The loaded file.
+    transform : callable, default: the identity function
+        A function called on each individual line of the file to transform it,
+        before further parsing.
+    fail_on_error : bool, default: False
+        Whether invalid entries should result in an exception or a warning.
+    """
+    import matplotlib as mpl
+    rc_temp = {}
+    with _open_file_or_url(fname) as fd:
+        try:
+            for line_no, line in enumerate(fd, 1):
+                line = transform(line)
+                strippedline = cbook._strip_comment(line)
+                if not strippedline:
+                    continue
+                tup = strippedline.split(':', 1)
+                if len(tup) != 2:
+                    _log.warning('Missing colon in file %r, line %d (%r)',
+                                 fname, line_no, line.rstrip('\n'))
+                    continue
+                key, val = tup
+                key = key.strip()
+                val = val.strip()
+                if val.startswith('"') and val.endswith('"'):
+                    val = val[1:-1]  # strip double quotes
+                if key in rc_temp:
+                    _log.warning('Duplicate key in file %r, line %d (%r)',
+                                 fname, line_no, line.rstrip('\n'))
+                rc_temp[key] = (val, line, line_no)
+        except UnicodeDecodeError:
+            _log.warning('Cannot decode configuration file %r as utf-8.',
+                         fname)
+            raise
+
+    config = RcParams()
+
+    for key, (val, line, line_no) in rc_temp.items():
+        if key in rcsetup._validators:
+            if fail_on_error:
+                config[key] = val  # try to convert to proper type or raise
+            else:
+                try:
+                    config[key] = val  # try to convert to proper type or skip
+                except Exception as msg:
+                    _log.warning('Bad value in file %r, line %d (%r): %s',
+                                 fname, line_no, line.rstrip('\n'), msg)
+        elif key in _deprecated_ignore_map:
+            version, alt_key = _deprecated_ignore_map[key]
+            _api.warn_deprecated(
+                version, name=key, alternative=alt_key, obj_type='rcparam',
+                addendum="Please update your matplotlibrc.")
+        else:
+            # __version__ must be looked up as an attribute to trigger the
+            # module-level __getattr__.
+            version = ('main' if '.post' in mpl.__version__
+                       else f'v{mpl.__version__}')
+            _log.warning("""
+Bad key %(key)s in file %(fname)s, line %(line_no)s (%(line)r)
+You probably need to get an updated matplotlibrc file from
+https://github.com/matplotlib/matplotlib/blob/%(version)s/lib/matplotlib/mpl-data/matplotlibrc
+or from the matplotlib source distribution""",
+                         dict(key=key, fname=fname, line_no=line_no,
+                              line=line.rstrip('\n'), version=version))
+    return config
+
+
+def rc_params_from_file(fname, fail_on_error=False, use_default_template=True):
+    """
+    Construct a `RcParams` from file *fname*.
+
+    Parameters
+    ----------
+    fname : str or path-like
+        A file with Matplotlib rc settings.
+    fail_on_error : bool
+        If True, raise an error when the parser fails to convert a parameter.
+    use_default_template : bool
+        If True, initialize with default parameters before updating with those
+        in the given file. If False, the configuration class only contains the
+        parameters specified in the file. (Useful for updating dicts.)
+    """
+    config_from_file = _rc_params_in_file(fname, fail_on_error=fail_on_error)
+
+    if not use_default_template:
+        return config_from_file
+
+    with _api.suppress_matplotlib_deprecation_warning():
+        config = RcParams({**rcParamsDefault, **config_from_file})
+
+    if "".join(config['text.latex.preamble']):
+        _log.info("""
+*****************************************************************
+You have the following UNSUPPORTED LaTeX preamble customizations:
+%s
+Please do not ask for support with these customizations active.
+*****************************************************************
+""", '\n'.join(config['text.latex.preamble']))
+    _log.debug('loaded rc file %s', fname)
+
+    return config
+
+
+rcParamsDefault = _rc_params_in_file(
+    cbook._get_data_path("matplotlibrc"),
+    # Strip leading comment.
+    transform=lambda line: line[1:] if line.startswith("#") else line,
+    fail_on_error=True)
+rcParamsDefault._update_raw(rcsetup._hardcoded_defaults)
+rcParamsDefault._ensure_has_backend()
+
+rcParams = RcParams()  # The global instance.
+rcParams._update_raw(rcParamsDefault)
+rcParams._update_raw(_rc_params_in_file(matplotlib_fname()))
+rcParamsOrig = rcParams.copy()
+with _api.suppress_matplotlib_deprecation_warning():
+    # This also checks that all rcParams are indeed listed in the template.
+    # Assigning to rcsetup.defaultParams is left only for backcompat.
+    defaultParams = rcsetup.defaultParams = {
+        # We want to resolve deprecated rcParams, but not backend...
+        key: [(rcsetup._auto_backend_sentinel if key == "backend" else
+               rcParamsDefault[key]),
+              validator]
+        for key, validator in rcsetup._validators.items()}
+if rcParams['axes.formatter.use_locale']:
+    locale.setlocale(locale.LC_ALL, '')
+
+
+def rc(group, **kwargs):
+    """
+    Set the current `.rcParams`.  *group* is the grouping for the rc, e.g.,
+    for ``lines.linewidth`` the group is ``lines``, for
+    ``axes.facecolor``, the group is ``axes``, and so on.  Group may
+    also be a list or tuple of group names, e.g., (*xtick*, *ytick*).
+    *kwargs* is a dictionary attribute name/value pairs, e.g.,::
+
+      rc('lines', linewidth=2, color='r')
+
+    sets the current `.rcParams` and is equivalent to::
+
+      rcParams['lines.linewidth'] = 2
+      rcParams['lines.color'] = 'r'
+
+    The following aliases are available to save typing for interactive users:
+
+    =====   =================
+    Alias   Property
+    =====   =================
+    'lw'    'linewidth'
+    'ls'    'linestyle'
+    'c'     'color'
+    'fc'    'facecolor'
+    'ec'    'edgecolor'
+    'mew'   'markeredgewidth'
+    'aa'    'antialiased'
+    =====   =================
+
+    Thus you could abbreviate the above call as::
+
+          rc('lines', lw=2, c='r')
+
+    Note you can use python's kwargs dictionary facility to store
+    dictionaries of default parameters.  e.g., you can customize the
+    font rc as follows::
+
+      font = {'family' : 'monospace',
+              'weight' : 'bold',
+              'size'   : 'larger'}
+      rc('font', **font)  # pass in the font dict as kwargs
+
+    This enables you to easily switch between several configurations.  Use
+    ``matplotlib.style.use('default')`` or :func:`~matplotlib.rcdefaults` to
+    restore the default `.rcParams` after changes.
+
+    Notes
+    -----
+    Similar functionality is available by using the normal dict interface, i.e.
+    ``rcParams.update({"lines.linewidth": 2, ...})`` (but ``rcParams.update``
+    does not support abbreviations or grouping).
+    """
+
+    aliases = {
+        'lw':  'linewidth',
+        'ls':  'linestyle',
+        'c':   'color',
+        'fc':  'facecolor',
+        'ec':  'edgecolor',
+        'mew': 'markeredgewidth',
+        'aa':  'antialiased',
+        }
+
+    if isinstance(group, str):
+        group = (group,)
+    for g in group:
+        for k, v in kwargs.items():
+            name = aliases.get(k) or k
+            key = f'{g}.{name}'
+            try:
+                rcParams[key] = v
+            except KeyError as err:
+                raise KeyError(('Unrecognized key "%s" for group "%s" and '
+                                'name "%s"') % (key, g, name)) from err
+
+
+def rcdefaults():
+    """
+    Restore the `.rcParams` from Matplotlib's internal default style.
+
+    Style-blacklisted `.rcParams` (defined in
+    ``matplotlib.style.core.STYLE_BLACKLIST``) are not updated.
+
+    See Also
+    --------
+    matplotlib.rc_file_defaults
+        Restore the `.rcParams` from the rc file originally loaded by
+        Matplotlib.
+    matplotlib.style.use
+        Use a specific style file.  Call ``style.use('default')`` to restore
+        the default style.
+    """
+    # Deprecation warnings were already handled when creating rcParamsDefault,
+    # no need to reemit them here.
+    with _api.suppress_matplotlib_deprecation_warning():
+        from .style.core import STYLE_BLACKLIST
+        rcParams.clear()
+        rcParams.update({k: v for k, v in rcParamsDefault.items()
+                         if k not in STYLE_BLACKLIST})
+
+
+def rc_file_defaults():
+    """
+    Restore the `.rcParams` from the original rc file loaded by Matplotlib.
+
+    Style-blacklisted `.rcParams` (defined in
+    ``matplotlib.style.core.STYLE_BLACKLIST``) are not updated.
+    """
+    # Deprecation warnings were already handled when creating rcParamsOrig, no
+    # need to reemit them here.
+    with _api.suppress_matplotlib_deprecation_warning():
+        from .style.core import STYLE_BLACKLIST
+        rcParams.update({k: rcParamsOrig[k] for k in rcParamsOrig
+                         if k not in STYLE_BLACKLIST})
+
+
+def rc_file(fname, *, use_default_template=True):
+    """
+    Update `.rcParams` from file.
+
+    Style-blacklisted `.rcParams` (defined in
+    ``matplotlib.style.core.STYLE_BLACKLIST``) are not updated.
+
+    Parameters
+    ----------
+    fname : str or path-like
+        A file with Matplotlib rc settings.
+
+    use_default_template : bool
+        If True, initialize with default parameters before updating with those
+        in the given file. If False, the current configuration persists
+        and only the parameters specified in the file are updated.
+    """
+    # Deprecation warnings were already handled in rc_params_from_file, no need
+    # to reemit them here.
+    with _api.suppress_matplotlib_deprecation_warning():
+        from .style.core import STYLE_BLACKLIST
+        rc_from_file = rc_params_from_file(
+            fname, use_default_template=use_default_template)
+        rcParams.update({k: rc_from_file[k] for k in rc_from_file
+                         if k not in STYLE_BLACKLIST})
+
+
+@contextlib.contextmanager
+def rc_context(rc=None, fname=None):
+    """
+    Return a context manager for temporarily changing rcParams.
+
+    The :rc:`backend` will not be reset by the context manager.
+
+    rcParams changed both through the context manager invocation and
+    in the body of the context will be reset on context exit.
+
+    Parameters
+    ----------
+    rc : dict
+        The rcParams to temporarily set.
+    fname : str or path-like
+        A file with Matplotlib rc settings. If both *fname* and *rc* are given,
+        settings from *rc* take precedence.
+
+    See Also
+    --------
+    :ref:`customizing-with-matplotlibrc-files`
+
+    Examples
+    --------
+    Passing explicit values via a dict::
+
+        with mpl.rc_context({'interactive': False}):
+            fig, ax = plt.subplots()
+            ax.plot(range(3), range(3))
+            fig.savefig('example.png')
+            plt.close(fig)
+
+    Loading settings from a file::
+
+         with mpl.rc_context(fname='print.rc'):
+             plt.plot(x, y)  # uses 'print.rc'
+
+    Setting in the context body::
+
+        with mpl.rc_context():
+            # will be reset
+            mpl.rcParams['lines.linewidth'] = 5
+            plt.plot(x, y)
+
+    """
+    orig = dict(rcParams.copy())
+    del orig['backend']
+    try:
+        if fname:
+            rc_file(fname)
+        if rc:
+            rcParams.update(rc)
+        yield
+    finally:
+        rcParams._update_raw(orig)  # Revert to the original rcs.
+
+
+def use(backend, *, force=True):
+    """
+    Select the backend used for rendering and GUI integration.
+
+    If pyplot is already imported, `~matplotlib.pyplot.switch_backend` is used
+    and if the new backend is different than the current backend, all Figures
+    will be closed.
+
+    Parameters
+    ----------
+    backend : str
+        The backend to switch to.  This can either be one of the standard
+        backend names, which are case-insensitive:
+
+        - interactive backends:
+          GTK3Agg, GTK3Cairo, GTK4Agg, GTK4Cairo, MacOSX, nbAgg, notebook, QtAgg,
+          QtCairo, TkAgg, TkCairo, WebAgg, WX, WXAgg, WXCairo, Qt5Agg, Qt5Cairo
+
+        - non-interactive backends:
+          agg, cairo, pdf, pgf, ps, svg, template
+
+        or a string of the form: ``module://my.module.name``.
+
+        notebook is a synonym for nbAgg.
+
+        Switching to an interactive backend is not possible if an unrelated
+        event loop has already been started (e.g., switching to GTK3Agg if a
+        TkAgg window has already been opened).  Switching to a non-interactive
+        backend is always possible.
+
+    force : bool, default: True
+        If True (the default), raise an `ImportError` if the backend cannot be
+        set up (either because it fails to import, or because an incompatible
+        GUI interactive framework is already running); if False, silently
+        ignore the failure.
+
+    See Also
+    --------
+    :ref:`backends`
+    matplotlib.get_backend
+    matplotlib.pyplot.switch_backend
+
+    """
+    name = rcsetup.validate_backend(backend)
+    # don't (prematurely) resolve the "auto" backend setting
+    if rcParams._get_backend_or_none() == name:
+        # Nothing to do if the requested backend is already set
+        pass
+    else:
+        # if pyplot is not already imported, do not import it.  Doing
+        # so may trigger a `plt.switch_backend` to the _default_ backend
+        # before we get a chance to change to the one the user just requested
+        plt = sys.modules.get('matplotlib.pyplot')
+        # if pyplot is imported, then try to change backends
+        if plt is not None:
+            try:
+                # we need this import check here to re-raise if the
+                # user does not have the libraries to support their
+                # chosen backend installed.
+                plt.switch_backend(name)
+            except ImportError:
+                if force:
+                    raise
+        # if we have not imported pyplot, then we can set the rcParam
+        # value which will be respected when the user finally imports
+        # pyplot
+        else:
+            rcParams['backend'] = backend
+    # if the user has asked for a given backend, do not helpfully
+    # fallback
+    rcParams['backend_fallback'] = False
+
+
+if os.environ.get('MPLBACKEND'):
+    rcParams['backend'] = os.environ.get('MPLBACKEND')
+
+
+def get_backend(*, auto_select=True):
+    """
+    Return the name of the current backend.
+
+    Parameters
+    ----------
+    auto_select : bool, default: True
+        Whether to trigger backend resolution if no backend has been
+        selected so far. If True, this ensures that a valid backend
+        is returned. If False, this returns None if no backend has been
+        selected so far.
+
+        .. versionadded:: 3.10
+
+        .. admonition:: Provisional
+
+           The *auto_select* flag is provisional. It may be changed or removed
+           without prior warning.
+
+    See Also
+    --------
+    matplotlib.use
+    """
+    if auto_select:
+        return rcParams['backend']
+    else:
+        backend = rcParams._get('backend')
+        if backend is rcsetup._auto_backend_sentinel:
+            return None
+        else:
+            return backend
+
+
+def interactive(b):
+    """
+    Set whether to redraw after every plotting command (e.g. `.pyplot.xlabel`).
+    """
+    rcParams['interactive'] = b
+
+
+def is_interactive():
+    """
+    Return whether to redraw after every plotting command.
+
+    .. note::
+
+        This function is only intended for use in backends. End users should
+        use `.pyplot.isinteractive` instead.
+    """
+    return rcParams['interactive']
+
+
+def _val_or_rc(val, rc_name):
+    """
+    If *val* is None, return ``mpl.rcParams[rc_name]``, otherwise return val.
+    """
+    return val if val is not None else rcParams[rc_name]
+
+
+def _init_tests():
+    # The version of FreeType to install locally for running the tests. This must match
+    # the value in `meson.build`.
+    LOCAL_FREETYPE_VERSION = '2.6.1'
+
+    from matplotlib import ft2font
+    if (ft2font.__freetype_version__ != LOCAL_FREETYPE_VERSION or
+            ft2font.__freetype_build_type__ != 'local'):
+        _log.warning(
+            "Matplotlib is not built with the correct FreeType version to run tests.  "
+            "Rebuild without setting system-freetype=true in Meson setup options.  "
+            "Expect many image comparison failures below.  "
+            "Expected freetype version %s.  "
+            "Found freetype version %s.  "
+            "Freetype build type is %slocal.",
+            LOCAL_FREETYPE_VERSION,
+            ft2font.__freetype_version__,
+            "" if ft2font.__freetype_build_type__ == 'local' else "not ")
+
+
+def _replacer(data, value):
+    """
+    Either returns ``data[value]`` or passes ``data`` back, converts either to
+    a sequence.
+    """
+    try:
+        # if key isn't a string don't bother
+        if isinstance(value, str):
+            # try to use __getitem__
+            value = data[value]
+    except Exception:
+        # key does not exist, silently fall back to key
+        pass
+    return cbook.sanitize_sequence(value)
+
+
+def _label_from_arg(y, default_name):
+    try:
+        return y.name
+    except AttributeError:
+        if isinstance(default_name, str):
+            return default_name
+    return None
+
+
+def _add_data_doc(docstring, replace_names):
+    """
+    Add documentation for a *data* field to the given docstring.
+
+    Parameters
+    ----------
+    docstring : str
+        The input docstring.
+    replace_names : list of str or None
+        The list of parameter names which arguments should be replaced by
+        ``data[name]`` (if ``data[name]`` does not throw an exception).  If
+        None, replacement is attempted for all arguments.
+
+    Returns
+    -------
+    str
+        The augmented docstring.
+    """
+    if (docstring is None
+            or replace_names is not None and len(replace_names) == 0):
+        return docstring
+    docstring = inspect.cleandoc(docstring)
+
+    data_doc = ("""\
+    If given, all parameters also accept a string ``s``, which is
+    interpreted as ``data[s]`` if ``s`` is a key in ``data``."""
+                if replace_names is None else f"""\
+    If given, the following parameters also accept a string ``s``, which is
+    interpreted as ``data[s]`` if ``s`` is a key in ``data``:
+
+    {', '.join(map('*{}*'.format, replace_names))}""")
+    # using string replacement instead of formatting has the advantages
+    # 1) simpler indent handling
+    # 2) prevent problems with formatting characters '{', '%' in the docstring
+    if _log.level <= logging.DEBUG:
+        # test_data_parameter_replacement() tests against these log messages
+        # make sure to keep message and test in sync
+        if "data : indexable object, optional" not in docstring:
+            _log.debug("data parameter docstring error: no data parameter")
+        if 'DATA_PARAMETER_PLACEHOLDER' not in docstring:
+            _log.debug("data parameter docstring error: missing placeholder")
+    return docstring.replace('    DATA_PARAMETER_PLACEHOLDER', data_doc)
+
+
+def _preprocess_data(func=None, *, replace_names=None, label_namer=None):
+    """
+    A decorator to add a 'data' kwarg to a function.
+
+    When applied::
+
+        @_preprocess_data()
+        def func(ax, *args, **kwargs): ...
+
+    the signature is modified to ``decorated(ax, *args, data=None, **kwargs)``
+    with the following behavior:
+
+    - if called with ``data=None``, forward the other arguments to ``func``;
+    - otherwise, *data* must be a mapping; for any argument passed in as a
+      string ``name``, replace the argument by ``data[name]`` (if this does not
+      throw an exception), then forward the arguments to ``func``.
+
+    In either case, any argument that is a `MappingView` is also converted to a
+    list.
+
+    Parameters
+    ----------
+    replace_names : list of str or None, default: None
+        The list of parameter names for which lookup into *data* should be
+        attempted. If None, replacement is attempted for all arguments.
+    label_namer : str, default: None
+        If set e.g. to "namer" (which must be a kwarg in the function's
+        signature -- not as ``**kwargs``), if the *namer* argument passed in is
+        a (string) key of *data* and no *label* kwarg is passed, then use the
+        (string) value of the *namer* as *label*. ::
+
+            @_preprocess_data(label_namer="foo")
+            def func(foo, label=None): ...
+
+            func("key", data={"key": value})
+            # is equivalent to
+            func.__wrapped__(value, label="key")
+    """
+
+    if func is None:  # Return the actual decorator.
+        return functools.partial(
+            _preprocess_data,
+            replace_names=replace_names, label_namer=label_namer)
+
+    sig = inspect.signature(func)
+    varargs_name = None
+    varkwargs_name = None
+    arg_names = []
+    params = list(sig.parameters.values())
+    for p in params:
+        if p.kind is Parameter.VAR_POSITIONAL:
+            varargs_name = p.name
+        elif p.kind is Parameter.VAR_KEYWORD:
+            varkwargs_name = p.name
+        else:
+            arg_names.append(p.name)
+    data_param = Parameter("data", Parameter.KEYWORD_ONLY, default=None)
+    if varkwargs_name:
+        params.insert(-1, data_param)
+    else:
+        params.append(data_param)
+    new_sig = sig.replace(parameters=params)
+    arg_names = arg_names[1:]  # remove the first "ax" / self arg
+
+    assert {*arg_names}.issuperset(replace_names or []) or varkwargs_name, (
+        "Matplotlib internal error: invalid replace_names "
+        f"({replace_names!r}) for {func.__name__!r}")
+    assert label_namer is None or label_namer in arg_names, (
+        "Matplotlib internal error: invalid label_namer "
+        f"({label_namer!r}) for {func.__name__!r}")
+
+    @functools.wraps(func)
+    def inner(ax, *args, data=None, **kwargs):
+        if data is None:
+            return func(
+                ax,
+                *map(cbook.sanitize_sequence, args),
+                **{k: cbook.sanitize_sequence(v) for k, v in kwargs.items()})
+
+        bound = new_sig.bind(ax, *args, **kwargs)
+        auto_label = (bound.arguments.get(label_namer)
+                      or bound.kwargs.get(label_namer))
+
+        for k, v in bound.arguments.items():
+            if k == varkwargs_name:
+                for k1, v1 in v.items():
+                    if replace_names is None or k1 in replace_names:
+                        v[k1] = _replacer(data, v1)
+            elif k == varargs_name:
+                if replace_names is None:
+                    bound.arguments[k] = tuple(_replacer(data, v1) for v1 in v)
+            else:
+                if replace_names is None or k in replace_names:
+                    bound.arguments[k] = _replacer(data, v)
+
+        new_args = bound.args
+        new_kwargs = bound.kwargs
+
+        args_and_kwargs = {**bound.arguments, **bound.kwargs}
+        if label_namer and "label" not in args_and_kwargs:
+            new_kwargs["label"] = _label_from_arg(
+                args_and_kwargs.get(label_namer), auto_label)
+
+        return func(*new_args, **new_kwargs)
+
+    inner.__doc__ = _add_data_doc(inner.__doc__, replace_names)
+    inner.__signature__ = new_sig
+    return inner
+
+
+_log.debug('interactive is %s', is_interactive())
+_log.debug('platform is %s', sys.platform)
+
+
+@_api.deprecated("3.10", alternative="matplotlib.cbook.sanitize_sequence")
+def sanitize_sequence(data):
+    return cbook.sanitize_sequence(data)
+
+
+@_api.deprecated("3.10", alternative="matplotlib.rcsetup.validate_backend")
+def validate_backend(s):
+    return rcsetup.validate_backend(s)
+
+
+# workaround: we must defer colormaps import to after loading rcParams, because
+# colormap creation depends on rcParams
+from matplotlib.cm import _colormaps as colormaps  # noqa: E402
+from matplotlib.cm import _multivar_colormaps as multivar_colormaps  # noqa: E402
+from matplotlib.cm import _bivar_colormaps as bivar_colormaps  # noqa: E402
+from matplotlib.colors import _color_sequences as color_sequences  # noqa: E402

moondream/lib/python3.10/site-packages/matplotlib/_afm.py

@@ -0,0 +1,532 @@
+"""
+A python interface to Adobe Font Metrics Files.
+
+Although a number of other Python implementations exist, and may be more
+complete than this, it was decided not to go with them because they were
+either:
+
+1) copyrighted or used a non-BSD compatible license
+2) had too many dependencies and a free standing lib was needed
+3) did more than needed and it was easier to write afresh rather than
+   figure out how to get just what was needed.
+
+It is pretty easy to use, and has no external dependencies:
+
+>>> import matplotlib as mpl
+>>> from pathlib import Path
+>>> afm_path = Path(mpl.get_data_path(), 'fonts', 'afm', 'ptmr8a.afm')
+>>>
+>>> from matplotlib.afm import AFM
+>>> with afm_path.open('rb') as fh:
+...     afm = AFM(fh)
+>>> afm.string_width_height('What the heck?')
+(6220.0, 694)
+>>> afm.get_fontname()
+'Times-Roman'
+>>> afm.get_kern_dist('A', 'f')
+0
+>>> afm.get_kern_dist('A', 'y')
+-92.0
+>>> afm.get_bbox_char('!')
+[130, -9, 238, 676]
+
+As in the Adobe Font Metrics File Format Specification, all dimensions
+are given in units of 1/1000 of the scale factor (point size) of the font
+being used.
+"""
+
+from collections import namedtuple
+import logging
+import re
+
+from ._mathtext_data import uni2type1
+
+
+_log = logging.getLogger(__name__)
+
+
+def _to_int(x):
+    # Some AFM files have floats where we are expecting ints -- there is
+    # probably a better way to handle this (support floats, round rather than
+    # truncate).  But I don't know what the best approach is now and this
+    # change to _to_int should at least prevent Matplotlib from crashing on
+    # these.  JDH (2009-11-06)
+    return int(float(x))
+
+
+def _to_float(x):
+    # Some AFM files use "," instead of "." as decimal separator -- this
+    # shouldn't be ambiguous (unless someone is wicked enough to use "," as
+    # thousands separator...).
+    if isinstance(x, bytes):
+        # Encoding doesn't really matter -- if we have codepoints >127 the call
+        # to float() will error anyways.
+        x = x.decode('latin-1')
+    return float(x.replace(',', '.'))
+
+
+def _to_str(x):
+    return x.decode('utf8')
+
+
+def _to_list_of_ints(s):
+    s = s.replace(b',', b' ')
+    return [_to_int(val) for val in s.split()]
+
+
+def _to_list_of_floats(s):
+    return [_to_float(val) for val in s.split()]
+
+
+def _to_bool(s):
+    if s.lower().strip() in (b'false', b'0', b'no'):
+        return False
+    else:
+        return True
+
+
+def _parse_header(fh):
+    """
+    Read the font metrics header (up to the char metrics) and returns
+    a dictionary mapping *key* to *val*.  *val* will be converted to the
+    appropriate python type as necessary; e.g.:
+
+        * 'False'->False
+        * '0'->0
+        * '-168 -218 1000 898'-> [-168, -218, 1000, 898]
+
+    Dictionary keys are
+
+      StartFontMetrics, FontName, FullName, FamilyName, Weight,
+      ItalicAngle, IsFixedPitch, FontBBox, UnderlinePosition,
+      UnderlineThickness, Version, Notice, EncodingScheme, CapHeight,
+      XHeight, Ascender, Descender, StartCharMetrics
+    """
+    header_converters = {
+        b'StartFontMetrics': _to_float,
+        b'FontName': _to_str,
+        b'FullName': _to_str,
+        b'FamilyName': _to_str,
+        b'Weight': _to_str,
+        b'ItalicAngle': _to_float,
+        b'IsFixedPitch': _to_bool,
+        b'FontBBox': _to_list_of_ints,
+        b'UnderlinePosition': _to_float,
+        b'UnderlineThickness': _to_float,
+        b'Version': _to_str,
+        # Some AFM files have non-ASCII characters (which are not allowed by
+        # the spec).  Given that there is actually no public API to even access
+        # this field, just return it as straight bytes.
+        b'Notice': lambda x: x,
+        b'EncodingScheme': _to_str,
+        b'CapHeight': _to_float,  # Is the second version a mistake, or
+        b'Capheight': _to_float,  # do some AFM files contain 'Capheight'? -JKS
+        b'XHeight': _to_float,
+        b'Ascender': _to_float,
+        b'Descender': _to_float,
+        b'StdHW': _to_float,
+        b'StdVW': _to_float,
+        b'StartCharMetrics': _to_int,
+        b'CharacterSet': _to_str,
+        b'Characters': _to_int,
+    }
+    d = {}
+    first_line = True
+    for line in fh:
+        line = line.rstrip()
+        if line.startswith(b'Comment'):
+            continue
+        lst = line.split(b' ', 1)
+        key = lst[0]
+        if first_line:
+            # AFM spec, Section 4: The StartFontMetrics keyword
+            # [followed by a version number] must be the first line in
+            # the file, and the EndFontMetrics keyword must be the
+            # last non-empty line in the file.  We just check the
+            # first header entry.
+            if key != b'StartFontMetrics':
+                raise RuntimeError('Not an AFM file')
+            first_line = False
+        if len(lst) == 2:
+            val = lst[1]
+        else:
+            val = b''
+        try:
+            converter = header_converters[key]
+        except KeyError:
+            _log.error("Found an unknown keyword in AFM header (was %r)", key)
+            continue
+        try:
+            d[key] = converter(val)
+        except ValueError:
+            _log.error('Value error parsing header in AFM: %s, %s', key, val)
+            continue
+        if key == b'StartCharMetrics':
+            break
+    else:
+        raise RuntimeError('Bad parse')
+    return d
+
+
+CharMetrics = namedtuple('CharMetrics', 'width, name, bbox')
+CharMetrics.__doc__ = """
+    Represents the character metrics of a single character.
+
+    Notes
+    -----
+    The fields do currently only describe a subset of character metrics
+    information defined in the AFM standard.
+    """
+CharMetrics.width.__doc__ = """The character width (WX)."""
+CharMetrics.name.__doc__ = """The character name (N)."""
+CharMetrics.bbox.__doc__ = """
+    The bbox of the character (B) as a tuple (*llx*, *lly*, *urx*, *ury*)."""
+
+
+def _parse_char_metrics(fh):
+    """
+    Parse the given filehandle for character metrics information and return
+    the information as dicts.
+
+    It is assumed that the file cursor is on the line behind
+    'StartCharMetrics'.
+
+    Returns
+    -------
+    ascii_d : dict
+         A mapping "ASCII num of the character" to `.CharMetrics`.
+    name_d : dict
+         A mapping "character name" to `.CharMetrics`.
+
+    Notes
+    -----
+    This function is incomplete per the standard, but thus far parses
+    all the sample afm files tried.
+    """
+    required_keys = {'C', 'WX', 'N', 'B'}
+
+    ascii_d = {}
+    name_d = {}
+    for line in fh:
+        # We are defensively letting values be utf8. The spec requires
+        # ascii, but there are non-compliant fonts in circulation
+        line = _to_str(line.rstrip())  # Convert from byte-literal
+        if line.startswith('EndCharMetrics'):
+            return ascii_d, name_d
+        # Split the metric line into a dictionary, keyed by metric identifiers
+        vals = dict(s.strip().split(' ', 1) for s in line.split(';') if s)
+        # There may be other metrics present, but only these are needed
+        if not required_keys.issubset(vals):
+            raise RuntimeError('Bad char metrics line: %s' % line)
+        num = _to_int(vals['C'])
+        wx = _to_float(vals['WX'])
+        name = vals['N']
+        bbox = _to_list_of_floats(vals['B'])
+        bbox = list(map(int, bbox))
+        metrics = CharMetrics(wx, name, bbox)
+        # Workaround: If the character name is 'Euro', give it the
+        # corresponding character code, according to WinAnsiEncoding (see PDF
+        # Reference).
+        if name == 'Euro':
+            num = 128
+        elif name == 'minus':
+            num = ord("\N{MINUS SIGN}")  # 0x2212
+        if num != -1:
+            ascii_d[num] = metrics
+        name_d[name] = metrics
+    raise RuntimeError('Bad parse')
+
+
+def _parse_kern_pairs(fh):
+    """
+    Return a kern pairs dictionary; keys are (*char1*, *char2*) tuples and
+    values are the kern pair value.  For example, a kern pairs line like
+    ``KPX A y -50``
+
+    will be represented as::
+
+      d[ ('A', 'y') ] = -50
+
+    """
+
+    line = next(fh)
+    if not line.startswith(b'StartKernPairs'):
+        raise RuntimeError('Bad start of kern pairs data: %s' % line)
+
+    d = {}
+    for line in fh:
+        line = line.rstrip()
+        if not line:
+            continue
+        if line.startswith(b'EndKernPairs'):
+            next(fh)  # EndKernData
+            return d
+        vals = line.split()
+        if len(vals) != 4 or vals[0] != b'KPX':
+            raise RuntimeError('Bad kern pairs line: %s' % line)
+        c1, c2, val = _to_str(vals[1]), _to_str(vals[2]), _to_float(vals[3])
+        d[(c1, c2)] = val
+    raise RuntimeError('Bad kern pairs parse')
+
+
+CompositePart = namedtuple('CompositePart', 'name, dx, dy')
+CompositePart.__doc__ = """
+    Represents the information on a composite element of a composite char."""
+CompositePart.name.__doc__ = """Name of the part, e.g. 'acute'."""
+CompositePart.dx.__doc__ = """x-displacement of the part from the origin."""
+CompositePart.dy.__doc__ = """y-displacement of the part from the origin."""
+
+
+def _parse_composites(fh):
+    """
+    Parse the given filehandle for composites information return them as a
+    dict.
+
+    It is assumed that the file cursor is on the line behind 'StartComposites'.
+
+    Returns
+    -------
+    dict
+        A dict mapping composite character names to a parts list. The parts
+        list is a list of `.CompositePart` entries describing the parts of
+        the composite.
+
+    Examples
+    --------
+    A composite definition line::
+
+      CC Aacute 2 ; PCC A 0 0 ; PCC acute 160 170 ;
+
+    will be represented as::
+
+      composites['Aacute'] = [CompositePart(name='A', dx=0, dy=0),
+                              CompositePart(name='acute', dx=160, dy=170)]
+
+    """
+    composites = {}
+    for line in fh:
+        line = line.rstrip()
+        if not line:
+            continue
+        if line.startswith(b'EndComposites'):
+            return composites
+        vals = line.split(b';')
+        cc = vals[0].split()
+        name, _num_parts = cc[1], _to_int(cc[2])
+        pccParts = []
+        for s in vals[1:-1]:
+            pcc = s.split()
+            part = CompositePart(pcc[1], _to_float(pcc[2]), _to_float(pcc[3]))
+            pccParts.append(part)
+        composites[name] = pccParts
+
+    raise RuntimeError('Bad composites parse')
+
+
+def _parse_optional(fh):
+    """
+    Parse the optional fields for kern pair data and composites.
+
+    Returns
+    -------
+    kern_data : dict
+        A dict containing kerning information. May be empty.
+        See `._parse_kern_pairs`.
+    composites : dict
+        A dict containing composite information. May be empty.
+        See `._parse_composites`.
+    """
+    optional = {
+        b'StartKernData': _parse_kern_pairs,
+        b'StartComposites':  _parse_composites,
+        }
+
+    d = {b'StartKernData': {},
+         b'StartComposites': {}}
+    for line in fh:
+        line = line.rstrip()
+        if not line:
+            continue
+        key = line.split()[0]
+
+        if key in optional:
+            d[key] = optional[key](fh)
+
+    return d[b'StartKernData'], d[b'StartComposites']
+
+
+class AFM:
+
+    def __init__(self, fh):
+        """Parse the AFM file in file object *fh*."""
+        self._header = _parse_header(fh)
+        self._metrics, self._metrics_by_name = _parse_char_metrics(fh)
+        self._kern, self._composite = _parse_optional(fh)
+
+    def get_bbox_char(self, c, isord=False):
+        if not isord:
+            c = ord(c)
+        return self._metrics[c].bbox
+
+    def string_width_height(self, s):
+        """
+        Return the string width (including kerning) and string height
+        as a (*w*, *h*) tuple.
+        """
+        if not len(s):
+            return 0, 0
+        total_width = 0
+        namelast = None
+        miny = 1e9
+        maxy = 0
+        for c in s:
+            if c == '\n':
+                continue
+            wx, name, bbox = self._metrics[ord(c)]
+
+            total_width += wx + self._kern.get((namelast, name), 0)
+            l, b, w, h = bbox
+            miny = min(miny, b)
+            maxy = max(maxy, b + h)
+
+            namelast = name
+
+        return total_width, maxy - miny
+
+    def get_str_bbox_and_descent(self, s):
+        """Return the string bounding box and the maximal descent."""
+        if not len(s):
+            return 0, 0, 0, 0, 0
+        total_width = 0
+        namelast = None
+        miny = 1e9
+        maxy = 0
+        left = 0
+        if not isinstance(s, str):
+            s = _to_str(s)
+        for c in s:
+            if c == '\n':
+                continue
+            name = uni2type1.get(ord(c), f"uni{ord(c):04X}")
+            try:
+                wx, _, bbox = self._metrics_by_name[name]
+            except KeyError:
+                name = 'question'
+                wx, _, bbox = self._metrics_by_name[name]
+            total_width += wx + self._kern.get((namelast, name), 0)
+            l, b, w, h = bbox
+            left = min(left, l)
+            miny = min(miny, b)
+            maxy = max(maxy, b + h)
+
+            namelast = name
+
+        return left, miny, total_width, maxy - miny, -miny
+
+    def get_str_bbox(self, s):
+        """Return the string bounding box."""
+        return self.get_str_bbox_and_descent(s)[:4]
+
+    def get_name_char(self, c, isord=False):
+        """Get the name of the character, i.e., ';' is 'semicolon'."""
+        if not isord:
+            c = ord(c)
+        return self._metrics[c].name
+
+    def get_width_char(self, c, isord=False):
+        """
+        Get the width of the character from the character metric WX field.
+        """
+        if not isord:
+            c = ord(c)
+        return self._metrics[c].width
+
+    def get_width_from_char_name(self, name):
+        """Get the width of the character from a type1 character name."""
+        return self._metrics_by_name[name].width
+
+    def get_height_char(self, c, isord=False):
+        """Get the bounding box (ink) height of character *c* (space is 0)."""
+        if not isord:
+            c = ord(c)
+        return self._metrics[c].bbox[-1]
+
+    def get_kern_dist(self, c1, c2):
+        """
+        Return the kerning pair distance (possibly 0) for chars *c1* and *c2*.
+        """
+        name1, name2 = self.get_name_char(c1), self.get_name_char(c2)
+        return self.get_kern_dist_from_name(name1, name2)
+
+    def get_kern_dist_from_name(self, name1, name2):
+        """
+        Return the kerning pair distance (possibly 0) for chars
+        *name1* and *name2*.
+        """
+        return self._kern.get((name1, name2), 0)
+
+    def get_fontname(self):
+        """Return the font name, e.g., 'Times-Roman'."""
+        return self._header[b'FontName']
+
+    @property
+    def postscript_name(self):  # For consistency with FT2Font.
+        return self.get_fontname()
+
+    def get_fullname(self):
+        """Return the font full name, e.g., 'Times-Roman'."""
+        name = self._header.get(b'FullName')
+        if name is None:  # use FontName as a substitute
+            name = self._header[b'FontName']
+        return name
+
+    def get_familyname(self):
+        """Return the font family name, e.g., 'Times'."""
+        name = self._header.get(b'FamilyName')
+        if name is not None:
+            return name
+
+        # FamilyName not specified so we'll make a guess
+        name = self.get_fullname()
+        extras = (r'(?i)([ -](regular|plain|italic|oblique|bold|semibold|'
+                  r'light|ultralight|extra|condensed))+$')
+        return re.sub(extras, '', name)
+
+    @property
+    def family_name(self):
+        """The font family name, e.g., 'Times'."""
+        return self.get_familyname()
+
+    def get_weight(self):
+        """Return the font weight, e.g., 'Bold' or 'Roman'."""
+        return self._header[b'Weight']
+
+    def get_angle(self):
+        """Return the fontangle as float."""
+        return self._header[b'ItalicAngle']
+
+    def get_capheight(self):
+        """Return the cap height as float."""
+        return self._header[b'CapHeight']
+
+    def get_xheight(self):
+        """Return the xheight as float."""
+        return self._header[b'XHeight']
+
+    def get_underline_thickness(self):
+        """Return the underline thickness as float."""
+        return self._header[b'UnderlineThickness']
+
+    def get_horizontal_stem_width(self):
+        """
+        Return the standard horizontal stem width as float, or *None* if
+        not specified in AFM file.
+        """
+        return self._header.get(b'StdHW', None)
+
+    def get_vertical_stem_width(self):
+        """
+        Return the standard vertical stem width as float, or *None* if
+        not specified in AFM file.
+        """
+        return self._header.get(b'StdVW', None)

moondream/lib/python3.10/site-packages/matplotlib/_animation_data.py

@@ -0,0 +1,262 @@
+# JavaScript template for HTMLWriter
+JS_INCLUDE = """
+<link rel="stylesheet"
+href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
+<script language="javascript">
+  function isInternetExplorer() {
+    ua = navigator.userAgent;
+    /* MSIE used to detect old browsers and Trident used to newer ones*/
+    return ua.indexOf("MSIE ") > -1 || ua.indexOf("Trident/") > -1;
+  }
+
+  /* Define the Animation class */
+  function Animation(frames, img_id, slider_id, interval, loop_select_id){
+    this.img_id = img_id;
+    this.slider_id = slider_id;
+    this.loop_select_id = loop_select_id;
+    this.interval = interval;
+    this.current_frame = 0;
+    this.direction = 0;
+    this.timer = null;
+    this.frames = new Array(frames.length);
+
+    for (var i=0; i<frames.length; i++)
+    {
+     this.frames[i] = new Image();
+     this.frames[i].src = frames[i];
+    }
+    var slider = document.getElementById(this.slider_id);
+    slider.max = this.frames.length - 1;
+    if (isInternetExplorer()) {
+        // switch from oninput to onchange because IE <= 11 does not conform
+        // with W3C specification. It ignores oninput and onchange behaves
+        // like oninput. In contrast, Microsoft Edge behaves correctly.
+        slider.setAttribute('onchange', slider.getAttribute('oninput'));
+        slider.setAttribute('oninput', null);
+    }
+    this.set_frame(this.current_frame);
+  }
+
+  Animation.prototype.get_loop_state = function(){
+    var button_group = document[this.loop_select_id].state;
+    for (var i = 0; i < button_group.length; i++) {
+        var button = button_group[i];
+        if (button.checked) {
+            return button.value;
+        }
+    }
+    return undefined;
+  }
+
+  Animation.prototype.set_frame = function(frame){
+    this.current_frame = frame;
+    document.getElementById(this.img_id).src =
+            this.frames[this.current_frame].src;
+    document.getElementById(this.slider_id).value = this.current_frame;
+  }
+
+  Animation.prototype.next_frame = function()
+  {
+    this.set_frame(Math.min(this.frames.length - 1, this.current_frame + 1));
+  }
+
+  Animation.prototype.previous_frame = function()
+  {
+    this.set_frame(Math.max(0, this.current_frame - 1));
+  }
+
+  Animation.prototype.first_frame = function()
+  {
+    this.set_frame(0);
+  }
+
+  Animation.prototype.last_frame = function()
+  {
+    this.set_frame(this.frames.length - 1);
+  }
+
+  Animation.prototype.slower = function()
+  {
+    this.interval /= 0.7;
+    if(this.direction > 0){this.play_animation();}
+    else if(this.direction < 0){this.reverse_animation();}
+  }
+
+  Animation.prototype.faster = function()
+  {
+    this.interval *= 0.7;
+    if(this.direction > 0){this.play_animation();}
+    else if(this.direction < 0){this.reverse_animation();}
+  }
+
+  Animation.prototype.anim_step_forward = function()
+  {
+    this.current_frame += 1;
+    if(this.current_frame < this.frames.length){
+      this.set_frame(this.current_frame);
+    }else{
+      var loop_state = this.get_loop_state();
+      if(loop_state == "loop"){
+        this.first_frame();
+      }else if(loop_state == "reflect"){
+        this.last_frame();
+        this.reverse_animation();
+      }else{
+        this.pause_animation();
+        this.last_frame();
+      }
+    }
+  }
+
+  Animation.prototype.anim_step_reverse = function()
+  {
+    this.current_frame -= 1;
+    if(this.current_frame >= 0){
+      this.set_frame(this.current_frame);
+    }else{
+      var loop_state = this.get_loop_state();
+      if(loop_state == "loop"){
+        this.last_frame();
+      }else if(loop_state == "reflect"){
+        this.first_frame();
+        this.play_animation();
+      }else{
+        this.pause_animation();
+        this.first_frame();
+      }
+    }
+  }
+
+  Animation.prototype.pause_animation = function()
+  {
+    this.direction = 0;
+    if (this.timer){
+      clearInterval(this.timer);
+      this.timer = null;
+    }
+  }
+
+  Animation.prototype.play_animation = function()
+  {
+    this.pause_animation();
+    this.direction = 1;
+    var t = this;
+    if (!this.timer) this.timer = setInterval(function() {
+        t.anim_step_forward();
+    }, this.interval);
+  }
+
+  Animation.prototype.reverse_animation = function()
+  {
+    this.pause_animation();
+    this.direction = -1;
+    var t = this;
+    if (!this.timer) this.timer = setInterval(function() {
+        t.anim_step_reverse();
+    }, this.interval);
+  }
+</script>
+"""
+
+
+# Style definitions for the HTML template
+STYLE_INCLUDE = """
+<style>
+.animation {
+    display: inline-block;
+    text-align: center;
+}
+input[type=range].anim-slider {
+    width: 374px;
+    margin-left: auto;
+    margin-right: auto;
+}
+.anim-buttons {
+    margin: 8px 0px;
+}
+.anim-buttons button {
+    padding: 0;
+    width: 36px;
+}
+.anim-state label {
+    margin-right: 8px;
+}
+.anim-state input {
+    margin: 0;
+    vertical-align: middle;
+}
+</style>
+"""
+
+
+# HTML template for HTMLWriter
+DISPLAY_TEMPLATE = """
+<div class="animation">
+  <img id="_anim_img{id}">
+  <div class="anim-controls">
+    <input id="_anim_slider{id}" type="range" class="anim-slider"
+           name="points" min="0" max="1" step="1" value="0"
+           oninput="anim{id}.set_frame(parseInt(this.value));">
+    <div class="anim-buttons">
+      <button title="Decrease speed" aria-label="Decrease speed" onclick="anim{id}.slower()">
+          <i class="fa fa-minus"></i></button>
+      <button title="First frame" aria-label="First frame" onclick="anim{id}.first_frame()">
+        <i class="fa fa-fast-backward"></i></button>
+      <button title="Previous frame" aria-label="Previous frame" onclick="anim{id}.previous_frame()">
+          <i class="fa fa-step-backward"></i></button>
+      <button title="Play backwards" aria-label="Play backwards" onclick="anim{id}.reverse_animation()">
+          <i class="fa fa-play fa-flip-horizontal"></i></button>
+      <button title="Pause" aria-label="Pause" onclick="anim{id}.pause_animation()">
+          <i class="fa fa-pause"></i></button>
+      <button title="Play" aria-label="Play" onclick="anim{id}.play_animation()">
+          <i class="fa fa-play"></i></button>
+      <button title="Next frame" aria-label="Next frame" onclick="anim{id}.next_frame()">
+          <i class="fa fa-step-forward"></i></button>
+      <button title="Last frame" aria-label="Last frame" onclick="anim{id}.last_frame()">
+          <i class="fa fa-fast-forward"></i></button>
+      <button title="Increase speed" aria-label="Increase speed" onclick="anim{id}.faster()">
+          <i class="fa fa-plus"></i></button>
+    </div>
+    <form title="Repetition mode" aria-label="Repetition mode" action="#n" name="_anim_loop_select{id}"
+          class="anim-state">
+      <input type="radio" name="state" value="once" id="_anim_radio1_{id}"
+             {once_checked}>
+      <label for="_anim_radio1_{id}">Once</label>
+      <input type="radio" name="state" value="loop" id="_anim_radio2_{id}"
+             {loop_checked}>
+      <label for="_anim_radio2_{id}">Loop</label>
+      <input type="radio" name="state" value="reflect" id="_anim_radio3_{id}"
+             {reflect_checked}>
+      <label for="_anim_radio3_{id}">Reflect</label>
+    </form>
+  </div>
+</div>
+
+
+<script language="javascript">
+  /* Instantiate the Animation class. */
+  /* The IDs given should match those used in the template above. */
+  (function() {{
+    var img_id = "_anim_img{id}";
+    var slider_id = "_anim_slider{id}";
+    var loop_select_id = "_anim_loop_select{id}";
+    var frames = new Array({Nframes});
+    {fill_frames}
+
+    /* set a timeout to make sure all the above elements are created before
+       the object is initialized. */
+    setTimeout(function() {{
+        anim{id} = new Animation(frames, img_id, slider_id, {interval},
+                                 loop_select_id);
+    }}, 0);
+  }})()
+</script>
+"""  # noqa: E501
+
+
+INCLUDED_FRAMES = """
+  for (var i=0; i<{Nframes}; i++){{
+    frames[i] = "{frame_dir}/frame" + ("0000000" + i).slice(-7) +
+                ".{frame_format}";
+  }}
+"""

moondream/lib/python3.10/site-packages/matplotlib/_c_internal_utils.pyi

@@ -0,0 +1,8 @@
+def display_is_valid() -> bool: ...
+def xdisplay_is_valid() -> bool: ...
+
+def Win32_GetForegroundWindow() -> int | None: ...
+def Win32_SetForegroundWindow(hwnd: int) -> None: ...
+def Win32_SetProcessDpiAwareness_max() -> None: ...
+def Win32_SetCurrentProcessExplicitAppUserModelID(appid: str) -> None: ...
+def Win32_GetCurrentProcessExplicitAppUserModelID() -> str | None: ...

moondream/lib/python3.10/site-packages/matplotlib/_color_data.pyi

@@ -0,0 +1,6 @@
+from .typing import ColorType
+
+BASE_COLORS: dict[str, ColorType]
+TABLEAU_COLORS: dict[str, ColorType]
+XKCD_COLORS: dict[str, ColorType]
+CSS4_COLORS: dict[str, ColorType]

moondream/lib/python3.10/site-packages/matplotlib/_constrained_layout.py

@@ -0,0 +1,801 @@
+"""
+Adjust subplot layouts so that there are no overlapping Axes or Axes
+decorations.  All Axes decorations are dealt with (labels, ticks, titles,
+ticklabels) and some dependent artists are also dealt with (colorbar,
+suptitle).
+
+Layout is done via `~matplotlib.gridspec`, with one constraint per gridspec,
+so it is possible to have overlapping Axes if the gridspecs overlap (i.e.
+using `~matplotlib.gridspec.GridSpecFromSubplotSpec`).  Axes placed using
+``figure.subplots()`` or ``figure.add_subplots()`` will participate in the
+layout.  Axes manually placed via ``figure.add_axes()`` will not.
+
+See Tutorial: :ref:`constrainedlayout_guide`
+
+General idea:
+-------------
+
+First, a figure has a gridspec that divides the figure into nrows and ncols,
+with heights and widths set by ``height_ratios`` and ``width_ratios``,
+often just set to 1 for an equal grid.
+
+Subplotspecs that are derived from this gridspec can contain either a
+``SubPanel``, a ``GridSpecFromSubplotSpec``, or an ``Axes``.  The ``SubPanel``
+and ``GridSpecFromSubplotSpec`` are dealt with recursively and each contain an
+analogous layout.
+
+Each ``GridSpec`` has a ``_layoutgrid`` attached to it.  The ``_layoutgrid``
+has the same logical layout as the ``GridSpec``.   Each row of the grid spec
+has a top and bottom "margin" and each column has a left and right "margin".
+The "inner" height of each row is constrained to be the same (or as modified
+by ``height_ratio``), and the "inner" width of each column is
+constrained to be the same (as modified by ``width_ratio``), where "inner"
+is the width or height of each column/row minus the size of the margins.
+
+Then the size of the margins for each row and column are determined as the
+max width of the decorators on each Axes that has decorators in that margin.
+For instance, a normal Axes would have a left margin that includes the
+left ticklabels, and the ylabel if it exists.  The right margin may include a
+colorbar, the bottom margin the xaxis decorations, and the top margin the
+title.
+
+With these constraints, the solver then finds appropriate bounds for the
+columns and rows.  It's possible that the margins take up the whole figure,
+in which case the algorithm is not applied and a warning is raised.
+
+See the tutorial :ref:`constrainedlayout_guide`
+for more discussion of the algorithm with examples.
+"""
+
+import logging
+
+import numpy as np
+
+from matplotlib import _api, artist as martist
+import matplotlib.transforms as mtransforms
+import matplotlib._layoutgrid as mlayoutgrid
+
+
+_log = logging.getLogger(__name__)
+
+
+######################################################
+def do_constrained_layout(fig, h_pad, w_pad,
+                          hspace=None, wspace=None, rect=(0, 0, 1, 1),
+                          compress=False):
+    """
+    Do the constrained_layout.  Called at draw time in
+     ``figure.constrained_layout()``
+
+    Parameters
+    ----------
+    fig : `~matplotlib.figure.Figure`
+        `.Figure` instance to do the layout in.
+
+    h_pad, w_pad : float
+      Padding around the Axes elements in figure-normalized units.
+
+    hspace, wspace : float
+       Fraction of the figure to dedicate to space between the
+       Axes.  These are evenly spread between the gaps between the Axes.
+       A value of 0.2 for a three-column layout would have a space
+       of 0.1 of the figure width between each column.
+       If h/wspace < h/w_pad, then the pads are used instead.
+
+    rect : tuple of 4 floats
+        Rectangle in figure coordinates to perform constrained layout in
+        [left, bottom, width, height], each from 0-1.
+
+    compress : bool
+        Whether to shift Axes so that white space in between them is
+        removed. This is useful for simple grids of fixed-aspect Axes (e.g.
+        a grid of images).
+
+    Returns
+    -------
+    layoutgrid : private debugging structure
+    """
+
+    renderer = fig._get_renderer()
+    # make layoutgrid tree...
+    layoutgrids = make_layoutgrids(fig, None, rect=rect)
+    if not layoutgrids['hasgrids']:
+        _api.warn_external('There are no gridspecs with layoutgrids. '
+                           'Possibly did not call parent GridSpec with the'
+                           ' "figure" keyword')
+        return
+
+    for _ in range(2):
+        # do the algorithm twice.  This has to be done because decorations
+        # change size after the first re-position (i.e. x/yticklabels get
+        # larger/smaller).  This second reposition tends to be much milder,
+        # so doing twice makes things work OK.
+
+        # make margins for all the Axes and subfigures in the
+        # figure.  Add margins for colorbars...
+        make_layout_margins(layoutgrids, fig, renderer, h_pad=h_pad,
+                            w_pad=w_pad, hspace=hspace, wspace=wspace)
+        make_margin_suptitles(layoutgrids, fig, renderer, h_pad=h_pad,
+                              w_pad=w_pad)
+
+        # if a layout is such that a columns (or rows) margin has no
+        # constraints, we need to make all such instances in the grid
+        # match in margin size.
+        match_submerged_margins(layoutgrids, fig)
+
+        # update all the variables in the layout.
+        layoutgrids[fig].update_variables()
+
+        warn_collapsed = ('constrained_layout not applied because '
+                          'axes sizes collapsed to zero.  Try making '
+                          'figure larger or Axes decorations smaller.')
+        if check_no_collapsed_axes(layoutgrids, fig):
+            reposition_axes(layoutgrids, fig, renderer, h_pad=h_pad,
+                            w_pad=w_pad, hspace=hspace, wspace=wspace)
+            if compress:
+                layoutgrids = compress_fixed_aspect(layoutgrids, fig)
+                layoutgrids[fig].update_variables()
+                if check_no_collapsed_axes(layoutgrids, fig):
+                    reposition_axes(layoutgrids, fig, renderer, h_pad=h_pad,
+                                    w_pad=w_pad, hspace=hspace, wspace=wspace)
+                else:
+                    _api.warn_external(warn_collapsed)
+
+                if ((suptitle := fig._suptitle) is not None and
+                        suptitle.get_in_layout() and suptitle._autopos):
+                    x, _ = suptitle.get_position()
+                    suptitle.set_position(
+                        (x, layoutgrids[fig].get_inner_bbox().y1 + h_pad))
+                    suptitle.set_verticalalignment('bottom')
+        else:
+            _api.warn_external(warn_collapsed)
+        reset_margins(layoutgrids, fig)
+    return layoutgrids
+
+
+def make_layoutgrids(fig, layoutgrids, rect=(0, 0, 1, 1)):
+    """
+    Make the layoutgrid tree.
+
+    (Sub)Figures get a layoutgrid so we can have figure margins.
+
+    Gridspecs that are attached to Axes get a layoutgrid so Axes
+    can have margins.
+    """
+
+    if layoutgrids is None:
+        layoutgrids = dict()
+        layoutgrids['hasgrids'] = False
+    if not hasattr(fig, '_parent'):
+        # top figure;  pass rect as parent to allow user-specified
+        # margins
+        layoutgrids[fig] = mlayoutgrid.LayoutGrid(parent=rect, name='figlb')
+    else:
+        # subfigure
+        gs = fig._subplotspec.get_gridspec()
+        # it is possible the gridspec containing this subfigure hasn't
+        # been added to the tree yet:
+        layoutgrids = make_layoutgrids_gs(layoutgrids, gs)
+        # add the layoutgrid for the subfigure:
+        parentlb = layoutgrids[gs]
+        layoutgrids[fig] = mlayoutgrid.LayoutGrid(
+            parent=parentlb,
+            name='panellb',
+            parent_inner=True,
+            nrows=1, ncols=1,
+            parent_pos=(fig._subplotspec.rowspan,
+                        fig._subplotspec.colspan))
+    # recursively do all subfigures in this figure...
+    for sfig in fig.subfigs:
+        layoutgrids = make_layoutgrids(sfig, layoutgrids)
+
+    # for each Axes at the local level add its gridspec:
+    for ax in fig._localaxes:
+        gs = ax.get_gridspec()
+        if gs is not None:
+            layoutgrids = make_layoutgrids_gs(layoutgrids, gs)
+
+    return layoutgrids
+
+
+def make_layoutgrids_gs(layoutgrids, gs):
+    """
+    Make the layoutgrid for a gridspec (and anything nested in the gridspec)
+    """
+
+    if gs in layoutgrids or gs.figure is None:
+        return layoutgrids
+    # in order to do constrained_layout there has to be at least *one*
+    # gridspec in the tree:
+    layoutgrids['hasgrids'] = True
+    if not hasattr(gs, '_subplot_spec'):
+        # normal gridspec
+        parent = layoutgrids[gs.figure]
+        layoutgrids[gs] = mlayoutgrid.LayoutGrid(
+                parent=parent,
+                parent_inner=True,
+                name='gridspec',
+                ncols=gs._ncols, nrows=gs._nrows,
+                width_ratios=gs.get_width_ratios(),
+                height_ratios=gs.get_height_ratios())
+    else:
+        # this is a gridspecfromsubplotspec:
+        subplot_spec = gs._subplot_spec
+        parentgs = subplot_spec.get_gridspec()
+        # if a nested gridspec it is possible the parent is not in there yet:
+        if parentgs not in layoutgrids:
+            layoutgrids = make_layoutgrids_gs(layoutgrids, parentgs)
+        subspeclb = layoutgrids[parentgs]
+        # gridspecfromsubplotspec need an outer container:
+        # get a unique representation:
+        rep = (gs, 'top')
+        if rep not in layoutgrids:
+            layoutgrids[rep] = mlayoutgrid.LayoutGrid(
+                parent=subspeclb,
+                name='top',
+                nrows=1, ncols=1,
+                parent_pos=(subplot_spec.rowspan, subplot_spec.colspan))
+        layoutgrids[gs] = mlayoutgrid.LayoutGrid(
+                parent=layoutgrids[rep],
+                name='gridspec',
+                nrows=gs._nrows, ncols=gs._ncols,
+                width_ratios=gs.get_width_ratios(),
+                height_ratios=gs.get_height_ratios())
+    return layoutgrids
+
+
+def check_no_collapsed_axes(layoutgrids, fig):
+    """
+    Check that no Axes have collapsed to zero size.
+    """
+    for sfig in fig.subfigs:
+        ok = check_no_collapsed_axes(layoutgrids, sfig)
+        if not ok:
+            return False
+    for ax in fig.axes:
+        gs = ax.get_gridspec()
+        if gs in layoutgrids:  # also implies gs is not None.
+            lg = layoutgrids[gs]
+            for i in range(gs.nrows):
+                for j in range(gs.ncols):
+                    bb = lg.get_inner_bbox(i, j)
+                    if bb.width <= 0 or bb.height <= 0:
+                        return False
+    return True
+
+
+def compress_fixed_aspect(layoutgrids, fig):
+    gs = None
+    for ax in fig.axes:
+        if ax.get_subplotspec() is None:
+            continue
+        ax.apply_aspect()
+        sub = ax.get_subplotspec()
+        _gs = sub.get_gridspec()
+        if gs is None:
+            gs = _gs
+            extraw = np.zeros(gs.ncols)
+            extrah = np.zeros(gs.nrows)
+        elif _gs != gs:
+            raise ValueError('Cannot do compressed layout if Axes are not'
+                             'all from the same gridspec')
+        orig = ax.get_position(original=True)
+        actual = ax.get_position(original=False)
+        dw = orig.width - actual.width
+        if dw > 0:
+            extraw[sub.colspan] = np.maximum(extraw[sub.colspan], dw)
+        dh = orig.height - actual.height
+        if dh > 0:
+            extrah[sub.rowspan] = np.maximum(extrah[sub.rowspan], dh)
+
+    if gs is None:
+        raise ValueError('Cannot do compressed layout if no Axes '
+                         'are part of a gridspec.')
+    w = np.sum(extraw) / 2
+    layoutgrids[fig].edit_margin_min('left', w)
+    layoutgrids[fig].edit_margin_min('right', w)
+
+    h = np.sum(extrah) / 2
+    layoutgrids[fig].edit_margin_min('top', h)
+    layoutgrids[fig].edit_margin_min('bottom', h)
+    return layoutgrids
+
+
+def get_margin_from_padding(obj, *, w_pad=0, h_pad=0,
+                            hspace=0, wspace=0):
+
+    ss = obj._subplotspec
+    gs = ss.get_gridspec()
+
+    if hasattr(gs, 'hspace'):
+        _hspace = (gs.hspace if gs.hspace is not None else hspace)
+        _wspace = (gs.wspace if gs.wspace is not None else wspace)
+    else:
+        _hspace = (gs._hspace if gs._hspace is not None else hspace)
+        _wspace = (gs._wspace if gs._wspace is not None else wspace)
+
+    _wspace = _wspace / 2
+    _hspace = _hspace / 2
+
+    nrows, ncols = gs.get_geometry()
+    # there are two margins for each direction.  The "cb"
+    # margins are for pads and colorbars, the non-"cb" are
+    # for the Axes decorations (labels etc).
+    margin = {'leftcb': w_pad, 'rightcb': w_pad,
+              'bottomcb': h_pad, 'topcb': h_pad,
+              'left': 0, 'right': 0,
+              'top': 0, 'bottom': 0}
+    if _wspace / ncols > w_pad:
+        if ss.colspan.start > 0:
+            margin['leftcb'] = _wspace / ncols
+        if ss.colspan.stop < ncols:
+            margin['rightcb'] = _wspace / ncols
+    if _hspace / nrows > h_pad:
+        if ss.rowspan.stop < nrows:
+            margin['bottomcb'] = _hspace / nrows
+        if ss.rowspan.start > 0:
+            margin['topcb'] = _hspace / nrows
+
+    return margin
+
+
+def make_layout_margins(layoutgrids, fig, renderer, *, w_pad=0, h_pad=0,
+                        hspace=0, wspace=0):
+    """
+    For each Axes, make a margin between the *pos* layoutbox and the
+    *axes* layoutbox be a minimum size that can accommodate the
+    decorations on the axis.
+
+    Then make room for colorbars.
+
+    Parameters
+    ----------
+    layoutgrids : dict
+    fig : `~matplotlib.figure.Figure`
+        `.Figure` instance to do the layout in.
+    renderer : `~matplotlib.backend_bases.RendererBase` subclass.
+        The renderer to use.
+    w_pad, h_pad : float, default: 0
+        Width and height padding (in fraction of figure).
+    hspace, wspace : float, default: 0
+        Width and height padding as fraction of figure size divided by
+        number of columns or rows.
+    """
+    for sfig in fig.subfigs:  # recursively make child panel margins
+        ss = sfig._subplotspec
+        gs = ss.get_gridspec()
+
+        make_layout_margins(layoutgrids, sfig, renderer,
+                            w_pad=w_pad, h_pad=h_pad,
+                            hspace=hspace, wspace=wspace)
+
+        margins = get_margin_from_padding(sfig, w_pad=0, h_pad=0,
+                                          hspace=hspace, wspace=wspace)
+        layoutgrids[gs].edit_outer_margin_mins(margins, ss)
+
+    for ax in fig._localaxes:
+        if not ax.get_subplotspec() or not ax.get_in_layout():
+            continue
+
+        ss = ax.get_subplotspec()
+        gs = ss.get_gridspec()
+
+        if gs not in layoutgrids:
+            return
+
+        margin = get_margin_from_padding(ax, w_pad=w_pad, h_pad=h_pad,
+                                         hspace=hspace, wspace=wspace)
+        pos, bbox = get_pos_and_bbox(ax, renderer)
+        # the margin is the distance between the bounding box of the Axes
+        # and its position (plus the padding from above)
+        margin['left'] += pos.x0 - bbox.x0
+        margin['right'] += bbox.x1 - pos.x1
+        # remember that rows are ordered from top:
+        margin['bottom'] += pos.y0 - bbox.y0
+        margin['top'] += bbox.y1 - pos.y1
+
+        # make margin for colorbars.  These margins go in the
+        # padding margin, versus the margin for Axes decorators.
+        for cbax in ax._colorbars:
+            # note pad is a fraction of the parent width...
+            pad = colorbar_get_pad(layoutgrids, cbax)
+            # colorbars can be child of more than one subplot spec:
+            cbp_rspan, cbp_cspan = get_cb_parent_spans(cbax)
+            loc = cbax._colorbar_info['location']
+            cbpos, cbbbox = get_pos_and_bbox(cbax, renderer)
+            if loc == 'right':
+                if cbp_cspan.stop == ss.colspan.stop:
+                    # only increase if the colorbar is on the right edge
+                    margin['rightcb'] += cbbbox.width + pad
+            elif loc == 'left':
+                if cbp_cspan.start == ss.colspan.start:
+                    # only increase if the colorbar is on the left edge
+                    margin['leftcb'] += cbbbox.width + pad
+            elif loc == 'top':
+                if cbp_rspan.start == ss.rowspan.start:
+                    margin['topcb'] += cbbbox.height + pad
+            else:
+                if cbp_rspan.stop == ss.rowspan.stop:
+                    margin['bottomcb'] += cbbbox.height + pad
+            # If the colorbars are wider than the parent box in the
+            # cross direction
+            if loc in ['top', 'bottom']:
+                if (cbp_cspan.start == ss.colspan.start and
+                        cbbbox.x0 < bbox.x0):
+                    margin['left'] += bbox.x0 - cbbbox.x0
+                if (cbp_cspan.stop == ss.colspan.stop and
+                        cbbbox.x1 > bbox.x1):
+                    margin['right'] += cbbbox.x1 - bbox.x1
+            # or taller:
+            if loc in ['left', 'right']:
+                if (cbp_rspan.stop == ss.rowspan.stop and
+                        cbbbox.y0 < bbox.y0):
+                    margin['bottom'] += bbox.y0 - cbbbox.y0
+                if (cbp_rspan.start == ss.rowspan.start and
+                        cbbbox.y1 > bbox.y1):
+                    margin['top'] += cbbbox.y1 - bbox.y1
+        # pass the new margins down to the layout grid for the solution...
+        layoutgrids[gs].edit_outer_margin_mins(margin, ss)
+
+    # make margins for figure-level legends:
+    for leg in fig.legends:
+        inv_trans_fig = None
+        if leg._outside_loc and leg._bbox_to_anchor is None:
+            if inv_trans_fig is None:
+                inv_trans_fig = fig.transFigure.inverted().transform_bbox
+            bbox = inv_trans_fig(leg.get_tightbbox(renderer))
+            w = bbox.width + 2 * w_pad
+            h = bbox.height + 2 * h_pad
+            legendloc = leg._outside_loc
+            if legendloc == 'lower':
+                layoutgrids[fig].edit_margin_min('bottom', h)
+            elif legendloc == 'upper':
+                layoutgrids[fig].edit_margin_min('top', h)
+            if legendloc == 'right':
+                layoutgrids[fig].edit_margin_min('right', w)
+            elif legendloc == 'left':
+                layoutgrids[fig].edit_margin_min('left', w)
+
+
+def make_margin_suptitles(layoutgrids, fig, renderer, *, w_pad=0, h_pad=0):
+    # Figure out how large the suptitle is and make the
+    # top level figure margin larger.
+
+    inv_trans_fig = fig.transFigure.inverted().transform_bbox
+    # get the h_pad and w_pad as distances in the local subfigure coordinates:
+    padbox = mtransforms.Bbox([[0, 0], [w_pad, h_pad]])
+    padbox = (fig.transFigure -
+              fig.transSubfigure).transform_bbox(padbox)
+    h_pad_local = padbox.height
+    w_pad_local = padbox.width
+
+    for sfig in fig.subfigs:
+        make_margin_suptitles(layoutgrids, sfig, renderer,
+                              w_pad=w_pad, h_pad=h_pad)
+
+    if fig._suptitle is not None and fig._suptitle.get_in_layout():
+        p = fig._suptitle.get_position()
+        if getattr(fig._suptitle, '_autopos', False):
+            fig._suptitle.set_position((p[0], 1 - h_pad_local))
+            bbox = inv_trans_fig(fig._suptitle.get_tightbbox(renderer))
+            layoutgrids[fig].edit_margin_min('top', bbox.height + 2 * h_pad)
+
+    if fig._supxlabel is not None and fig._supxlabel.get_in_layout():
+        p = fig._supxlabel.get_position()
+        if getattr(fig._supxlabel, '_autopos', False):
+            fig._supxlabel.set_position((p[0], h_pad_local))
+            bbox = inv_trans_fig(fig._supxlabel.get_tightbbox(renderer))
+            layoutgrids[fig].edit_margin_min('bottom',
+                                             bbox.height + 2 * h_pad)
+
+    if fig._supylabel is not None and fig._supylabel.get_in_layout():
+        p = fig._supylabel.get_position()
+        if getattr(fig._supylabel, '_autopos', False):
+            fig._supylabel.set_position((w_pad_local, p[1]))
+            bbox = inv_trans_fig(fig._supylabel.get_tightbbox(renderer))
+            layoutgrids[fig].edit_margin_min('left', bbox.width + 2 * w_pad)
+
+
+def match_submerged_margins(layoutgrids, fig):
+    """
+    Make the margins that are submerged inside an Axes the same size.
+
+    This allows Axes that span two columns (or rows) that are offset
+    from one another to have the same size.
+
+    This gives the proper layout for something like::
+        fig = plt.figure(constrained_layout=True)
+        axs = fig.subplot_mosaic("AAAB\nCCDD")
+
+    Without this routine, the Axes D will be wider than C, because the
+    margin width between the two columns in C has no width by default,
+    whereas the margins between the two columns of D are set by the
+    width of the margin between A and B. However, obviously the user would
+    like C and D to be the same size, so we need to add constraints to these
+    "submerged" margins.
+
+    This routine makes all the interior margins the same, and the spacing
+    between the three columns in A and the two column in C are all set to the
+    margins between the two columns of D.
+
+    See test_constrained_layout::test_constrained_layout12 for an example.
+    """
+
+    for sfig in fig.subfigs:
+        match_submerged_margins(layoutgrids, sfig)
+
+    axs = [a for a in fig.get_axes()
+           if a.get_subplotspec() is not None and a.get_in_layout()]
+
+    for ax1 in axs:
+        ss1 = ax1.get_subplotspec()
+        if ss1.get_gridspec() not in layoutgrids:
+            axs.remove(ax1)
+            continue
+        lg1 = layoutgrids[ss1.get_gridspec()]
+
+        # interior columns:
+        if len(ss1.colspan) > 1:
+            maxsubl = np.max(
+                lg1.margin_vals['left'][ss1.colspan[1:]] +
+                lg1.margin_vals['leftcb'][ss1.colspan[1:]]
+            )
+            maxsubr = np.max(
+                lg1.margin_vals['right'][ss1.colspan[:-1]] +
+                lg1.margin_vals['rightcb'][ss1.colspan[:-1]]
+            )
+            for ax2 in axs:
+                ss2 = ax2.get_subplotspec()
+                lg2 = layoutgrids[ss2.get_gridspec()]
+                if lg2 is not None and len(ss2.colspan) > 1:
+                    maxsubl2 = np.max(
+                        lg2.margin_vals['left'][ss2.colspan[1:]] +
+                        lg2.margin_vals['leftcb'][ss2.colspan[1:]])
+                    if maxsubl2 > maxsubl:
+                        maxsubl = maxsubl2
+                    maxsubr2 = np.max(
+                        lg2.margin_vals['right'][ss2.colspan[:-1]] +
+                        lg2.margin_vals['rightcb'][ss2.colspan[:-1]])
+                    if maxsubr2 > maxsubr:
+                        maxsubr = maxsubr2
+            for i in ss1.colspan[1:]:
+                lg1.edit_margin_min('left', maxsubl, cell=i)
+            for i in ss1.colspan[:-1]:
+                lg1.edit_margin_min('right', maxsubr, cell=i)
+
+        # interior rows:
+        if len(ss1.rowspan) > 1:
+            maxsubt = np.max(
+                lg1.margin_vals['top'][ss1.rowspan[1:]] +
+                lg1.margin_vals['topcb'][ss1.rowspan[1:]]
+            )
+            maxsubb = np.max(
+                lg1.margin_vals['bottom'][ss1.rowspan[:-1]] +
+                lg1.margin_vals['bottomcb'][ss1.rowspan[:-1]]
+            )
+
+            for ax2 in axs:
+                ss2 = ax2.get_subplotspec()
+                lg2 = layoutgrids[ss2.get_gridspec()]
+                if lg2 is not None:
+                    if len(ss2.rowspan) > 1:
+                        maxsubt = np.max([np.max(
+                            lg2.margin_vals['top'][ss2.rowspan[1:]] +
+                            lg2.margin_vals['topcb'][ss2.rowspan[1:]]
+                        ), maxsubt])
+                        maxsubb = np.max([np.max(
+                            lg2.margin_vals['bottom'][ss2.rowspan[:-1]] +
+                            lg2.margin_vals['bottomcb'][ss2.rowspan[:-1]]
+                        ), maxsubb])
+            for i in ss1.rowspan[1:]:
+                lg1.edit_margin_min('top', maxsubt, cell=i)
+            for i in ss1.rowspan[:-1]:
+                lg1.edit_margin_min('bottom', maxsubb, cell=i)
+
+
+def get_cb_parent_spans(cbax):
+    """
+    Figure out which subplotspecs this colorbar belongs to.
+
+    Parameters
+    ----------
+    cbax : `~matplotlib.axes.Axes`
+        Axes for the colorbar.
+    """
+    rowstart = np.inf
+    rowstop = -np.inf
+    colstart = np.inf
+    colstop = -np.inf
+    for parent in cbax._colorbar_info['parents']:
+        ss = parent.get_subplotspec()
+        rowstart = min(ss.rowspan.start, rowstart)
+        rowstop = max(ss.rowspan.stop, rowstop)
+        colstart = min(ss.colspan.start, colstart)
+        colstop = max(ss.colspan.stop, colstop)
+
+    rowspan = range(rowstart, rowstop)
+    colspan = range(colstart, colstop)
+    return rowspan, colspan
+
+
+def get_pos_and_bbox(ax, renderer):
+    """
+    Get the position and the bbox for the Axes.
+
+    Parameters
+    ----------
+    ax : `~matplotlib.axes.Axes`
+    renderer : `~matplotlib.backend_bases.RendererBase` subclass.
+
+    Returns
+    -------
+    pos : `~matplotlib.transforms.Bbox`
+        Position in figure coordinates.
+    bbox : `~matplotlib.transforms.Bbox`
+        Tight bounding box in figure coordinates.
+    """
+    fig = ax.get_figure(root=False)
+    pos = ax.get_position(original=True)
+    # pos is in panel co-ords, but we need in figure for the layout
+    pos = pos.transformed(fig.transSubfigure - fig.transFigure)
+    tightbbox = martist._get_tightbbox_for_layout_only(ax, renderer)
+    if tightbbox is None:
+        bbox = pos
+    else:
+        bbox = tightbbox.transformed(fig.transFigure.inverted())
+    return pos, bbox
+
+
+def reposition_axes(layoutgrids, fig, renderer, *,
+                    w_pad=0, h_pad=0, hspace=0, wspace=0):
+    """
+    Reposition all the Axes based on the new inner bounding box.
+    """
+    trans_fig_to_subfig = fig.transFigure - fig.transSubfigure
+    for sfig in fig.subfigs:
+        bbox = layoutgrids[sfig].get_outer_bbox()
+        sfig._redo_transform_rel_fig(
+            bbox=bbox.transformed(trans_fig_to_subfig))
+        reposition_axes(layoutgrids, sfig, renderer,
+                        w_pad=w_pad, h_pad=h_pad,
+                        wspace=wspace, hspace=hspace)
+
+    for ax in fig._localaxes:
+        if ax.get_subplotspec() is None or not ax.get_in_layout():
+            continue
+
+        # grid bbox is in Figure coordinates, but we specify in panel
+        # coordinates...
+        ss = ax.get_subplotspec()
+        gs = ss.get_gridspec()
+        if gs not in layoutgrids:
+            return
+
+        bbox = layoutgrids[gs].get_inner_bbox(rows=ss.rowspan,
+                                              cols=ss.colspan)
+
+        # transform from figure to panel for set_position:
+        newbbox = trans_fig_to_subfig.transform_bbox(bbox)
+        ax._set_position(newbbox)
+
+        # move the colorbars:
+        # we need to keep track of oldw and oldh if there is more than
+        # one colorbar:
+        offset = {'left': 0, 'right': 0, 'bottom': 0, 'top': 0}
+        for nn, cbax in enumerate(ax._colorbars[::-1]):
+            if ax == cbax._colorbar_info['parents'][0]:
+                reposition_colorbar(layoutgrids, cbax, renderer,
+                                    offset=offset)
+
+
+def reposition_colorbar(layoutgrids, cbax, renderer, *, offset=None):
+    """
+    Place the colorbar in its new place.
+
+    Parameters
+    ----------
+    layoutgrids : dict
+    cbax : `~matplotlib.axes.Axes`
+        Axes for the colorbar.
+    renderer : `~matplotlib.backend_bases.RendererBase` subclass.
+        The renderer to use.
+    offset : array-like
+        Offset the colorbar needs to be pushed to in order to
+        account for multiple colorbars.
+    """
+
+    parents = cbax._colorbar_info['parents']
+    gs = parents[0].get_gridspec()
+    fig = cbax.get_figure(root=False)
+    trans_fig_to_subfig = fig.transFigure - fig.transSubfigure
+
+    cb_rspans, cb_cspans = get_cb_parent_spans(cbax)
+    bboxparent = layoutgrids[gs].get_bbox_for_cb(rows=cb_rspans,
+                                                 cols=cb_cspans)
+    pb = layoutgrids[gs].get_inner_bbox(rows=cb_rspans, cols=cb_cspans)
+
+    location = cbax._colorbar_info['location']
+    anchor = cbax._colorbar_info['anchor']
+    fraction = cbax._colorbar_info['fraction']
+    aspect = cbax._colorbar_info['aspect']
+    shrink = cbax._colorbar_info['shrink']
+
+    cbpos, cbbbox = get_pos_and_bbox(cbax, renderer)
+
+    # Colorbar gets put at extreme edge of outer bbox of the subplotspec
+    # It needs to be moved in by: 1) a pad 2) its "margin" 3) by
+    # any colorbars already added at this location:
+    cbpad = colorbar_get_pad(layoutgrids, cbax)
+    if location in ('left', 'right'):
+        # fraction and shrink are fractions of parent
+        pbcb = pb.shrunk(fraction, shrink).anchored(anchor, pb)
+        # The colorbar is at the left side of the parent.  Need
+        # to translate to right (or left)
+        if location == 'right':
+            lmargin = cbpos.x0 - cbbbox.x0
+            dx = bboxparent.x1 - pbcb.x0 + offset['right']
+            dx += cbpad + lmargin
+            offset['right'] += cbbbox.width + cbpad
+            pbcb = pbcb.translated(dx, 0)
+        else:
+            lmargin = cbpos.x0 - cbbbox.x0
+            dx = bboxparent.x0 - pbcb.x0  # edge of parent
+            dx += -cbbbox.width - cbpad + lmargin - offset['left']
+            offset['left'] += cbbbox.width + cbpad
+            pbcb = pbcb.translated(dx, 0)
+    else:  # horizontal axes:
+        pbcb = pb.shrunk(shrink, fraction).anchored(anchor, pb)
+        if location == 'top':
+            bmargin = cbpos.y0 - cbbbox.y0
+            dy = bboxparent.y1 - pbcb.y0 + offset['top']
+            dy += cbpad + bmargin
+            offset['top'] += cbbbox.height + cbpad
+            pbcb = pbcb.translated(0, dy)
+        else:
+            bmargin = cbpos.y0 - cbbbox.y0
+            dy = bboxparent.y0 - pbcb.y0
+            dy += -cbbbox.height - cbpad + bmargin - offset['bottom']
+            offset['bottom'] += cbbbox.height + cbpad
+            pbcb = pbcb.translated(0, dy)
+
+    pbcb = trans_fig_to_subfig.transform_bbox(pbcb)
+    cbax.set_transform(fig.transSubfigure)
+    cbax._set_position(pbcb)
+    cbax.set_anchor(anchor)
+    if location in ['bottom', 'top']:
+        aspect = 1 / aspect
+    cbax.set_box_aspect(aspect)
+    cbax.set_aspect('auto')
+    return offset
+
+
+def reset_margins(layoutgrids, fig):
+    """
+    Reset the margins in the layoutboxes of *fig*.
+
+    Margins are usually set as a minimum, so if the figure gets smaller
+    the minimum needs to be zero in order for it to grow again.
+    """
+    for sfig in fig.subfigs:
+        reset_margins(layoutgrids, sfig)
+    for ax in fig.axes:
+        if ax.get_in_layout():
+            gs = ax.get_gridspec()
+            if gs in layoutgrids:  # also implies gs is not None.
+                layoutgrids[gs].reset_margins()
+    layoutgrids[fig].reset_margins()
+
+
+def colorbar_get_pad(layoutgrids, cax):
+    parents = cax._colorbar_info['parents']
+    gs = parents[0].get_gridspec()
+
+    cb_rspans, cb_cspans = get_cb_parent_spans(cax)
+    bboxouter = layoutgrids[gs].get_inner_bbox(rows=cb_rspans, cols=cb_cspans)
+
+    if cax._colorbar_info['location'] in ['right', 'left']:
+        size = bboxouter.width
+    else:
+        size = bboxouter.height
+
+    return cax._colorbar_info['pad'] * size

moondream/lib/python3.10/site-packages/matplotlib/_docstring.pyi

@@ -0,0 +1,34 @@
+from collections.abc import Callable
+from typing import Any, TypeVar, overload
+
+
+_T = TypeVar('_T')
+
+
+def kwarg_doc(text: str) -> Callable[[_T], _T]: ...
+
+
+class Substitution:
+    @overload
+    def __init__(self, *args: str): ...
+    @overload
+    def __init__(self, **kwargs: str): ...
+    def __call__(self, func: _T) -> _T: ...
+    def update(self, *args, **kwargs): ...  # type: ignore[no-untyped-def]
+
+
+class _ArtistKwdocLoader(dict[str, str]):
+    def __missing__(self, key: str) -> str: ...
+
+
+class _ArtistPropertiesSubstitution:
+    def __init__(self) -> None: ...
+    def register(self, **kwargs) -> None: ...
+    def __call__(self, obj: _T) -> _T: ...
+
+
+def copy(source: Any) -> Callable[[_T], _T]: ...
+
+
+dedent_interpd: _ArtistPropertiesSubstitution
+interpd: _ArtistPropertiesSubstitution

moondream/lib/python3.10/site-packages/matplotlib/_enums.py

@@ -0,0 +1,187 @@
+"""
+Enums representing sets of strings that Matplotlib uses as input parameters.
+
+Matplotlib often uses simple data types like strings or tuples to define a
+concept; e.g. the line capstyle can be specified as one of 'butt', 'round',
+or 'projecting'. The classes in this module are used internally and serve to
+document these concepts formally.
+
+As an end-user you will not use these classes directly, but only the values
+they define.
+"""
+
+from enum import Enum, auto
+from matplotlib import _docstring
+
+
+class _AutoStringNameEnum(Enum):
+    """Automate the ``name = 'name'`` part of making a (str, Enum)."""
+
+    def _generate_next_value_(name, start, count, last_values):
+        return name
+
+    def __hash__(self):
+        return str(self).__hash__()
+
+
+class JoinStyle(str, _AutoStringNameEnum):
+    """
+    Define how the connection between two line segments is drawn.
+
+    For a visual impression of each *JoinStyle*, `view these docs online
+    <JoinStyle>`, or run `JoinStyle.demo`.
+
+    Lines in Matplotlib are typically defined by a 1D `~.path.Path` and a
+    finite ``linewidth``, where the underlying 1D `~.path.Path` represents the
+    center of the stroked line.
+
+    By default, `~.backend_bases.GraphicsContextBase` defines the boundaries of
+    a stroked line to simply be every point within some radius,
+    ``linewidth/2``, away from any point of the center line. However, this
+    results in corners appearing "rounded", which may not be the desired
+    behavior if you are drawing, for example, a polygon or pointed star.
+
+    **Supported values:**
+
+    .. rst-class:: value-list
+
+        'miter'
+            the "arrow-tip" style. Each boundary of the filled-in area will
+            extend in a straight line parallel to the tangent vector of the
+            centerline at the point it meets the corner, until they meet in a
+            sharp point.
+        'round'
+            stokes every point within a radius of ``linewidth/2`` of the center
+            lines.
+        'bevel'
+            the "squared-off" style. It can be thought of as a rounded corner
+            where the "circular" part of the corner has been cut off.
+
+    .. note::
+
+        Very long miter tips are cut off (to form a *bevel*) after a
+        backend-dependent limit called the "miter limit", which specifies the
+        maximum allowed ratio of miter length to line width. For example, the
+        PDF backend uses the default value of 10 specified by the PDF standard,
+        while the SVG backend does not even specify the miter limit, resulting
+        in a default value of 4 per the SVG specification. Matplotlib does not
+        currently allow the user to adjust this parameter.
+
+        A more detailed description of the effect of a miter limit can be found
+        in the `Mozilla Developer Docs
+        <https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/stroke-miterlimit>`_
+
+    .. plot::
+        :alt: Demo of possible JoinStyle's
+
+        from matplotlib._enums import JoinStyle
+        JoinStyle.demo()
+
+    """
+
+    miter = auto()
+    round = auto()
+    bevel = auto()
+
+    @staticmethod
+    def demo():
+        """Demonstrate how each JoinStyle looks for various join angles."""
+        import numpy as np
+        import matplotlib.pyplot as plt
+
+        def plot_angle(ax, x, y, angle, style):
+            phi = np.radians(angle)
+            xx = [x + .5, x, x + .5*np.cos(phi)]
+            yy = [y, y, y + .5*np.sin(phi)]
+            ax.plot(xx, yy, lw=12, color='tab:blue', solid_joinstyle=style)
+            ax.plot(xx, yy, lw=1, color='black')
+            ax.plot(xx[1], yy[1], 'o', color='tab:red', markersize=3)
+
+        fig, ax = plt.subplots(figsize=(5, 4), constrained_layout=True)
+        ax.set_title('Join style')
+        for x, style in enumerate(['miter', 'round', 'bevel']):
+            ax.text(x, 5, style)
+            for y, angle in enumerate([20, 45, 60, 90, 120]):
+                plot_angle(ax, x, y, angle, style)
+                if x == 0:
+                    ax.text(-1.3, y, f'{angle} degrees')
+        ax.set_xlim(-1.5, 2.75)
+        ax.set_ylim(-.5, 5.5)
+        ax.set_axis_off()
+        fig.show()
+
+
+JoinStyle.input_description = "{" \
+        + ", ".join([f"'{js.name}'" for js in JoinStyle]) \
+        + "}"
+
+
+class CapStyle(str, _AutoStringNameEnum):
+    r"""
+    Define how the two endpoints (caps) of an unclosed line are drawn.
+
+    How to draw the start and end points of lines that represent a closed curve
+    (i.e. that end in a `~.path.Path.CLOSEPOLY`) is controlled by the line's
+    `JoinStyle`. For all other lines, how the start and end points are drawn is
+    controlled by the *CapStyle*.
+
+    For a visual impression of each *CapStyle*, `view these docs online
+    <CapStyle>` or run `CapStyle.demo`.
+
+    By default, `~.backend_bases.GraphicsContextBase` draws a stroked line as
+    squared off at its endpoints.
+
+    **Supported values:**
+
+    .. rst-class:: value-list
+
+        'butt'
+            the line is squared off at its endpoint.
+        'projecting'
+            the line is squared off as in *butt*, but the filled in area
+            extends beyond the endpoint a distance of ``linewidth/2``.
+        'round'
+            like *butt*, but a semicircular cap is added to the end of the
+            line, of radius ``linewidth/2``.
+
+    .. plot::
+        :alt: Demo of possible CapStyle's
+
+        from matplotlib._enums import CapStyle
+        CapStyle.demo()
+
+    """
+    butt = auto()
+    projecting = auto()
+    round = auto()
+
+    @staticmethod
+    def demo():
+        """Demonstrate how each CapStyle looks for a thick line segment."""
+        import matplotlib.pyplot as plt
+
+        fig = plt.figure(figsize=(4, 1.2))
+        ax = fig.add_axes([0, 0, 1, 0.8])
+        ax.set_title('Cap style')
+
+        for x, style in enumerate(['butt', 'round', 'projecting']):
+            ax.text(x+0.25, 0.85, style, ha='center')
+            xx = [x, x+0.5]
+            yy = [0, 0]
+            ax.plot(xx, yy, lw=12, color='tab:blue', solid_capstyle=style)
+            ax.plot(xx, yy, lw=1, color='black')
+            ax.plot(xx, yy, 'o', color='tab:red', markersize=3)
+
+        ax.set_ylim(-.5, 1.5)
+        ax.set_axis_off()
+        fig.show()
+
+
+CapStyle.input_description = "{" \
+        + ", ".join([f"'{cs.name}'" for cs in CapStyle]) \
+        + "}"
+
+_docstring.interpd.register(
+    JoinStyle=JoinStyle.input_description,
+    CapStyle=CapStyle.input_description,
+)

moondream/lib/python3.10/site-packages/matplotlib/_mathtext_data.py

@@ -0,0 +1,1742 @@
+"""
+font data tables for truetype and afm computer modern fonts
+"""
+
+from __future__ import annotations
+from typing import overload
+
+latex_to_bakoma = {
+    '\\__sqrt__'                 : ('cmex10', 0x70),
+    '\\bigcap'                   : ('cmex10', 0x5c),
+    '\\bigcup'                   : ('cmex10', 0x5b),
+    '\\bigodot'                  : ('cmex10', 0x4b),
+    '\\bigoplus'                 : ('cmex10', 0x4d),
+    '\\bigotimes'                : ('cmex10', 0x4f),
+    '\\biguplus'                 : ('cmex10', 0x5d),
+    '\\bigvee'                   : ('cmex10', 0x5f),
+    '\\bigwedge'                 : ('cmex10', 0x5e),
+    '\\coprod'                   : ('cmex10', 0x61),
+    '\\int'                      : ('cmex10', 0x5a),
+    '\\langle'                   : ('cmex10', 0xad),
+    '\\leftangle'                : ('cmex10', 0xad),
+    '\\leftbrace'                : ('cmex10', 0xa9),
+    '\\oint'                     : ('cmex10', 0x49),
+    '\\prod'                     : ('cmex10', 0x59),
+    '\\rangle'                   : ('cmex10', 0xae),
+    '\\rightangle'               : ('cmex10', 0xae),
+    '\\rightbrace'               : ('cmex10', 0xaa),
+    '\\sum'                      : ('cmex10', 0x58),
+    '\\widehat'                  : ('cmex10', 0x62),
+    '\\widetilde'                : ('cmex10', 0x65),
+    '\\{'                        : ('cmex10', 0xa9),
+    '\\}'                        : ('cmex10', 0xaa),
+    '{'                          : ('cmex10', 0xa9),
+    '}'                          : ('cmex10', 0xaa),
+
+    ','                          : ('cmmi10', 0x3b),
+    '.'                          : ('cmmi10', 0x3a),
+    '/'                          : ('cmmi10', 0x3d),
+    '<'                          : ('cmmi10', 0x3c),
+    '>'                          : ('cmmi10', 0x3e),
+    '\\alpha'                    : ('cmmi10', 0xae),
+    '\\beta'                     : ('cmmi10', 0xaf),
+    '\\chi'                      : ('cmmi10', 0xc2),
+    '\\combiningrightarrowabove' : ('cmmi10', 0x7e),
+    '\\delta'                    : ('cmmi10', 0xb1),
+    '\\ell'                      : ('cmmi10', 0x60),
+    '\\epsilon'                  : ('cmmi10', 0xb2),
+    '\\eta'                      : ('cmmi10', 0xb4),
+    '\\flat'                     : ('cmmi10', 0x5b),
+    '\\frown'                    : ('cmmi10', 0x5f),
+    '\\gamma'                    : ('cmmi10', 0xb0),
+    '\\imath'                    : ('cmmi10', 0x7b),
+    '\\iota'                     : ('cmmi10', 0xb6),
+    '\\jmath'                    : ('cmmi10', 0x7c),
+    '\\kappa'                    : ('cmmi10', 0x2219),
+    '\\lambda'                   : ('cmmi10', 0xb8),
+    '\\leftharpoondown'          : ('cmmi10', 0x29),
+    '\\leftharpoonup'            : ('cmmi10', 0x28),
+    '\\mu'                       : ('cmmi10', 0xb9),
+    '\\natural'                  : ('cmmi10', 0x5c),
+    '\\nu'                       : ('cmmi10', 0xba),
+    '\\omega'                    : ('cmmi10', 0x21),
+    '\\phi'                      : ('cmmi10', 0xc1),
+    '\\pi'                       : ('cmmi10', 0xbc),
+    '\\psi'                      : ('cmmi10', 0xc3),
+    '\\rho'                      : ('cmmi10', 0xbd),
+    '\\rightharpoondown'         : ('cmmi10', 0x2b),
+    '\\rightharpoonup'           : ('cmmi10', 0x2a),
+    '\\sharp'                    : ('cmmi10', 0x5d),
+    '\\sigma'                    : ('cmmi10', 0xbe),
+    '\\smile'                    : ('cmmi10', 0x5e),
+    '\\tau'                      : ('cmmi10', 0xbf),
+    '\\theta'                    : ('cmmi10', 0xb5),
+    '\\triangleleft'             : ('cmmi10', 0x2f),
+    '\\triangleright'            : ('cmmi10', 0x2e),
+    '\\upsilon'                  : ('cmmi10', 0xc0),
+    '\\varepsilon'               : ('cmmi10', 0x22),
+    '\\varphi'                   : ('cmmi10', 0x27),
+    '\\varrho'                   : ('cmmi10', 0x25),
+    '\\varsigma'                 : ('cmmi10', 0x26),
+    '\\vartheta'                 : ('cmmi10', 0x23),
+    '\\wp'                       : ('cmmi10', 0x7d),
+    '\\xi'                       : ('cmmi10', 0xbb),
+    '\\zeta'                     : ('cmmi10', 0xb3),
+
+    '!'                          : ('cmr10', 0x21),
+    '%'                          : ('cmr10', 0x25),
+    '&'                          : ('cmr10', 0x26),
+    '('                          : ('cmr10', 0x28),
+    ')'                          : ('cmr10', 0x29),
+    '+'                          : ('cmr10', 0x2b),
+    '0'                          : ('cmr10', 0x30),
+    '1'                          : ('cmr10', 0x31),
+    '2'                          : ('cmr10', 0x32),
+    '3'                          : ('cmr10', 0x33),
+    '4'                          : ('cmr10', 0x34),
+    '5'                          : ('cmr10', 0x35),
+    '6'                          : ('cmr10', 0x36),
+    '7'                          : ('cmr10', 0x37),
+    '8'                          : ('cmr10', 0x38),
+    '9'                          : ('cmr10', 0x39),
+    ':'                          : ('cmr10', 0x3a),
+    ';'                          : ('cmr10', 0x3b),
+    '='                          : ('cmr10', 0x3d),
+    '?'                          : ('cmr10', 0x3f),
+    '@'                          : ('cmr10', 0x40),
+    '['                          : ('cmr10', 0x5b),
+    '\\#'                        : ('cmr10', 0x23),
+    '\\$'                        : ('cmr10', 0x24),
+    '\\%'                        : ('cmr10', 0x25),
+    '\\Delta'                    : ('cmr10', 0xa2),
+    '\\Gamma'                    : ('cmr10', 0xa1),
+    '\\Lambda'                   : ('cmr10', 0xa4),
+    '\\Omega'                    : ('cmr10', 0xad),
+    '\\Phi'                      : ('cmr10', 0xa9),
+    '\\Pi'                       : ('cmr10', 0xa6),
+    '\\Psi'                      : ('cmr10', 0xaa),
+    '\\Sigma'                    : ('cmr10', 0xa7),
+    '\\Theta'                    : ('cmr10', 0xa3),
+    '\\Upsilon'                  : ('cmr10', 0xa8),
+    '\\Xi'                       : ('cmr10', 0xa5),
+    '\\circumflexaccent'         : ('cmr10', 0x5e),
+    '\\combiningacuteaccent'     : ('cmr10', 0xb6),
+    '\\combiningbreve'           : ('cmr10', 0xb8),
+    '\\combiningdiaeresis'       : ('cmr10', 0xc4),
+    '\\combiningdotabove'        : ('cmr10', 0x5f),
+    '\\combininggraveaccent'     : ('cmr10', 0xb5),
+    '\\combiningoverline'        : ('cmr10', 0xb9),
+    '\\combiningtilde'           : ('cmr10', 0x7e),
+    '\\leftbracket'              : ('cmr10', 0x5b),
+    '\\leftparen'                : ('cmr10', 0x28),
+    '\\rightbracket'             : ('cmr10', 0x5d),
+    '\\rightparen'               : ('cmr10', 0x29),
+    '\\widebar'                  : ('cmr10', 0xb9),
+    ']'                          : ('cmr10', 0x5d),
+
+    '*'                          : ('cmsy10', 0xa4),
+    '\N{MINUS SIGN}'             : ('cmsy10', 0xa1),
+    '\\Downarrow'                : ('cmsy10', 0x2b),
+    '\\Im'                       : ('cmsy10', 0x3d),
+    '\\Leftarrow'                : ('cmsy10', 0x28),
+    '\\Leftrightarrow'           : ('cmsy10', 0x2c),
+    '\\P'                        : ('cmsy10', 0x7b),
+    '\\Re'                       : ('cmsy10', 0x3c),
+    '\\Rightarrow'               : ('cmsy10', 0x29),
+    '\\S'                        : ('cmsy10', 0x78),
+    '\\Uparrow'                  : ('cmsy10', 0x2a),
+    '\\Updownarrow'              : ('cmsy10', 0x6d),
+    '\\Vert'                     : ('cmsy10', 0x6b),
+    '\\aleph'                    : ('cmsy10', 0x40),
+    '\\approx'                   : ('cmsy10', 0xbc),
+    '\\ast'                      : ('cmsy10', 0xa4),
+    '\\asymp'                    : ('cmsy10', 0xb3),
+    '\\backslash'                : ('cmsy10', 0x6e),
+    '\\bigcirc'                  : ('cmsy10', 0xb0),
+    '\\bigtriangledown'          : ('cmsy10', 0x35),
+    '\\bigtriangleup'            : ('cmsy10', 0x34),
+    '\\bot'                      : ('cmsy10', 0x3f),
+    '\\bullet'                   : ('cmsy10', 0xb2),
+    '\\cap'                      : ('cmsy10', 0x5c),
+    '\\cdot'                     : ('cmsy10', 0xa2),
+    '\\circ'                     : ('cmsy10', 0xb1),
+    '\\clubsuit'                 : ('cmsy10', 0x7c),
+    '\\cup'                      : ('cmsy10', 0x5b),
+    '\\dag'                      : ('cmsy10', 0x79),
+    '\\dashv'                    : ('cmsy10', 0x61),
+    '\\ddag'                     : ('cmsy10', 0x7a),
+    '\\diamond'                  : ('cmsy10', 0xa6),
+    '\\diamondsuit'              : ('cmsy10', 0x7d),
+    '\\div'                      : ('cmsy10', 0xa5),
+    '\\downarrow'                : ('cmsy10', 0x23),
+    '\\emptyset'                 : ('cmsy10', 0x3b),
+    '\\equiv'                    : ('cmsy10', 0xb4),
+    '\\exists'                   : ('cmsy10', 0x39),
+    '\\forall'                   : ('cmsy10', 0x38),
+    '\\geq'                      : ('cmsy10', 0xb8),
+    '\\gg'                       : ('cmsy10', 0xc0),
+    '\\heartsuit'                : ('cmsy10', 0x7e),
+    '\\in'                       : ('cmsy10', 0x32),
+    '\\infty'                    : ('cmsy10', 0x31),
+    '\\lbrace'                   : ('cmsy10', 0x66),
+    '\\lceil'                    : ('cmsy10', 0x64),
+    '\\leftarrow'                : ('cmsy10', 0xc3),
+    '\\leftrightarrow'           : ('cmsy10', 0x24),
+    '\\leq'                      : ('cmsy10', 0x2219),
+    '\\lfloor'                   : ('cmsy10', 0x62),
+    '\\ll'                       : ('cmsy10', 0xbf),
+    '\\mid'                      : ('cmsy10', 0x6a),
+    '\\mp'                       : ('cmsy10', 0xa8),
+    '\\nabla'                    : ('cmsy10', 0x72),
+    '\\nearrow'                  : ('cmsy10', 0x25),
+    '\\neg'                      : ('cmsy10', 0x3a),
+    '\\ni'                       : ('cmsy10', 0x33),
+    '\\nwarrow'                  : ('cmsy10', 0x2d),
+    '\\odot'                     : ('cmsy10', 0xaf),
+    '\\ominus'                   : ('cmsy10', 0xaa),
+    '\\oplus'                    : ('cmsy10', 0xa9),
+    '\\oslash'                   : ('cmsy10', 0xae),
+    '\\otimes'                   : ('cmsy10', 0xad),
+    '\\pm'                       : ('cmsy10', 0xa7),
+    '\\prec'                     : ('cmsy10', 0xc1),
+    '\\preceq'                   : ('cmsy10', 0xb9),
+    '\\prime'                    : ('cmsy10', 0x30),
+    '\\propto'                   : ('cmsy10', 0x2f),
+    '\\rbrace'                   : ('cmsy10', 0x67),
+    '\\rceil'                    : ('cmsy10', 0x65),
+    '\\rfloor'                   : ('cmsy10', 0x63),
+    '\\rightarrow'               : ('cmsy10', 0x21),
+    '\\searrow'                  : ('cmsy10', 0x26),
+    '\\sim'                      : ('cmsy10', 0xbb),
+    '\\simeq'                    : ('cmsy10', 0x27),
+    '\\slash'                    : ('cmsy10', 0x36),
+    '\\spadesuit'                : ('cmsy10', 0xc4),
+    '\\sqcap'                    : ('cmsy10', 0x75),
+    '\\sqcup'                    : ('cmsy10', 0x74),
+    '\\sqsubseteq'               : ('cmsy10', 0x76),
+    '\\sqsupseteq'               : ('cmsy10', 0x77),
+    '\\subset'                   : ('cmsy10', 0xbd),
+    '\\subseteq'                 : ('cmsy10', 0xb5),
+    '\\succ'                     : ('cmsy10', 0xc2),
+    '\\succeq'                   : ('cmsy10', 0xba),
+    '\\supset'                   : ('cmsy10', 0xbe),
+    '\\supseteq'                 : ('cmsy10', 0xb6),
+    '\\swarrow'                  : ('cmsy10', 0x2e),
+    '\\times'                    : ('cmsy10', 0xa3),
+    '\\to'                       : ('cmsy10', 0x21),
+    '\\top'                      : ('cmsy10', 0x3e),
+    '\\uparrow'                  : ('cmsy10', 0x22),
+    '\\updownarrow'              : ('cmsy10', 0x6c),
+    '\\uplus'                    : ('cmsy10', 0x5d),
+    '\\vdash'                    : ('cmsy10', 0x60),
+    '\\vee'                      : ('cmsy10', 0x5f),
+    '\\vert'                     : ('cmsy10', 0x6a),
+    '\\wedge'                    : ('cmsy10', 0x5e),
+    '\\wr'                       : ('cmsy10', 0x6f),
+    '\\|'                        : ('cmsy10', 0x6b),
+    '|'                          : ('cmsy10', 0x6a),
+
+    '\\_'                        : ('cmtt10', 0x5f)
+}
+
+# Automatically generated.
+
+type12uni = {
+    'aring'          : 229,
+    'quotedblright'  : 8221,
+    'V'              : 86,
+    'dollar'         : 36,
+    'four'           : 52,
+    'Yacute'         : 221,
+    'P'              : 80,
+    'underscore'     : 95,
+    'p'              : 112,
+    'Otilde'         : 213,
+    'perthousand'    : 8240,
+    'zero'           : 48,
+    'dotlessi'       : 305,
+    'Scaron'         : 352,
+    'zcaron'         : 382,
+    'egrave'         : 232,
+    'section'        : 167,
+    'Icircumflex'    : 206,
+    'ntilde'         : 241,
+    'ampersand'      : 38,
+    'dotaccent'      : 729,
+    'degree'         : 176,
+    'K'              : 75,
+    'acircumflex'    : 226,
+    'Aring'          : 197,
+    'k'              : 107,
+    'smalltilde'     : 732,
+    'Agrave'         : 192,
+    'divide'         : 247,
+    'ocircumflex'    : 244,
+    'asciitilde'     : 126,
+    'two'            : 50,
+    'E'              : 69,
+    'scaron'         : 353,
+    'F'              : 70,
+    'bracketleft'    : 91,
+    'asciicircum'    : 94,
+    'f'              : 102,
+    'ordmasculine'   : 186,
+    'mu'             : 181,
+    'paragraph'      : 182,
+    'nine'           : 57,
+    'v'              : 118,
+    'guilsinglleft'  : 8249,
+    'backslash'      : 92,
+    'six'            : 54,
+    'A'              : 65,
+    'icircumflex'    : 238,
+    'a'              : 97,
+    'ogonek'         : 731,
+    'q'              : 113,
+    'oacute'         : 243,
+    'ograve'         : 242,
+    'edieresis'      : 235,
+    'comma'          : 44,
+    'otilde'         : 245,
+    'guillemotright' : 187,
+    'ecircumflex'    : 234,
+    'greater'        : 62,
+    'uacute'         : 250,
+    'L'              : 76,
+    'bullet'         : 8226,
+    'cedilla'        : 184,
+    'ydieresis'      : 255,
+    'l'              : 108,
+    'logicalnot'     : 172,
+    'exclamdown'     : 161,
+    'endash'         : 8211,
+    'agrave'         : 224,
+    'Adieresis'      : 196,
+    'germandbls'     : 223,
+    'Odieresis'      : 214,
+    'space'          : 32,
+    'quoteright'     : 8217,
+    'ucircumflex'    : 251,
+    'G'              : 71,
+    'quoteleft'      : 8216,
+    'W'              : 87,
+    'Q'              : 81,
+    'g'              : 103,
+    'w'              : 119,
+    'question'       : 63,
+    'one'            : 49,
+    'ring'           : 730,
+    'figuredash'     : 8210,
+    'B'              : 66,
+    'iacute'         : 237,
+    'Ydieresis'      : 376,
+    'R'              : 82,
+    'b'              : 98,
+    'r'              : 114,
+    'Ccedilla'       : 199,
+    'minus'          : 8722,
+    'Lslash'         : 321,
+    'Uacute'         : 218,
+    'yacute'         : 253,
+    'Ucircumflex'    : 219,
+    'quotedbl'       : 34,
+    'onehalf'        : 189,
+    'Thorn'          : 222,
+    'M'              : 77,
+    'eight'          : 56,
+    'multiply'       : 215,
+    'grave'          : 96,
+    'Ocircumflex'    : 212,
+    'm'              : 109,
+    'Ugrave'         : 217,
+    'guilsinglright' : 8250,
+    'Ntilde'         : 209,
+    'questiondown'   : 191,
+    'Atilde'         : 195,
+    'ccedilla'       : 231,
+    'Z'              : 90,
+    'copyright'      : 169,
+    'yen'            : 165,
+    'Eacute'         : 201,
+    'H'              : 72,
+    'X'              : 88,
+    'Idieresis'      : 207,
+    'bar'            : 124,
+    'h'              : 104,
+    'x'              : 120,
+    'udieresis'      : 252,
+    'ordfeminine'    : 170,
+    'braceleft'      : 123,
+    'macron'         : 175,
+    'atilde'         : 227,
+    'Acircumflex'    : 194,
+    'Oslash'         : 216,
+    'C'              : 67,
+    'quotedblleft'   : 8220,
+    'S'              : 83,
+    'exclam'         : 33,
+    'Zcaron'         : 381,
+    'equal'          : 61,
+    's'              : 115,
+    'eth'            : 240,
+    'Egrave'         : 200,
+    'hyphen'         : 45,
+    'period'         : 46,
+    'igrave'         : 236,
+    'colon'          : 58,
+    'Ecircumflex'    : 202,
+    'trademark'      : 8482,
+    'Aacute'         : 193,
+    'cent'           : 162,
+    'lslash'         : 322,
+    'c'              : 99,
+    'N'              : 78,
+    'breve'          : 728,
+    'Oacute'         : 211,
+    'guillemotleft'  : 171,
+    'n'              : 110,
+    'idieresis'      : 239,
+    'braceright'     : 125,
+    'seven'          : 55,
+    'brokenbar'      : 166,
+    'ugrave'         : 249,
+    'periodcentered' : 183,
+    'sterling'       : 163,
+    'I'              : 73,
+    'Y'              : 89,
+    'Eth'            : 208,
+    'emdash'         : 8212,
+    'i'              : 105,
+    'daggerdbl'      : 8225,
+    'y'              : 121,
+    'plusminus'      : 177,
+    'less'           : 60,
+    'Udieresis'      : 220,
+    'D'              : 68,
+    'five'           : 53,
+    'T'              : 84,
+    'oslash'         : 248,
+    'acute'          : 180,
+    'd'              : 100,
+    'OE'             : 338,
+    'Igrave'         : 204,
+    't'              : 116,
+    'parenright'     : 41,
+    'adieresis'      : 228,
+    'quotesingle'    : 39,
+    'twodotenleader' : 8229,
+    'slash'          : 47,
+    'ellipsis'       : 8230,
+    'numbersign'     : 35,
+    'odieresis'      : 246,
+    'O'              : 79,
+    'oe'             : 339,
+    'o'              : 111,
+    'Edieresis'      : 203,
+    'plus'           : 43,
+    'dagger'         : 8224,
+    'three'          : 51,
+    'hungarumlaut'   : 733,
+    'parenleft'      : 40,
+    'fraction'       : 8260,
+    'registered'     : 174,
+    'J'              : 74,
+    'dieresis'       : 168,
+    'Ograve'         : 210,
+    'j'              : 106,
+    'z'              : 122,
+    'ae'             : 230,
+    'semicolon'      : 59,
+    'at'             : 64,
+    'Iacute'         : 205,
+    'percent'        : 37,
+    'bracketright'   : 93,
+    'AE'             : 198,
+    'asterisk'       : 42,
+    'aacute'         : 225,
+    'U'              : 85,
+    'eacute'         : 233,
+    'e'              : 101,
+    'thorn'          : 254,
+    'u'              : 117,
+}
+
+uni2type1 = {v: k for k, v in type12uni.items()}
+
+#  The script below is to sort and format the tex2uni dict
+
+## For decimal values: int(hex(v), 16)
+#  newtex = {k: hex(v) for k, v in tex2uni.items()}
+#  sd = dict(sorted(newtex.items(), key=lambda item: item[0]))
+#
+## For formatting the sorted dictionary with proper spacing
+## the value '24' comes from finding the longest string in
+## the newtex keys with len(max(newtex, key=len))
+#  for key in sd:
+#      print("{0:24} : {1: <s},".format("'" + key + "'", sd[key]))
+
+tex2uni = {
+    '#'                      : 0x23,
+    '$'                      : 0x24,
+    '%'                      : 0x25,
+    'AA'                     : 0xc5,
+    'AE'                     : 0xc6,
+    'BbbC'                   : 0x2102,
+    'BbbN'                   : 0x2115,
+    'BbbP'                   : 0x2119,
+    'BbbQ'                   : 0x211a,
+    'BbbR'                   : 0x211d,
+    'BbbZ'                   : 0x2124,
+    'Bumpeq'                 : 0x224e,
+    'Cap'                    : 0x22d2,
+    'Colon'                  : 0x2237,
+    'Cup'                    : 0x22d3,
+    'DH'                     : 0xd0,
+    'Delta'                  : 0x394,
+    'Doteq'                  : 0x2251,
+    'Downarrow'              : 0x21d3,
+    'Equiv'                  : 0x2263,
+    'Finv'                   : 0x2132,
+    'Game'                   : 0x2141,
+    'Gamma'                  : 0x393,
+    'H'                      : 0x30b,
+    'Im'                     : 0x2111,
+    'Join'                   : 0x2a1d,
+    'L'                      : 0x141,
+    'Lambda'                 : 0x39b,
+    'Ldsh'                   : 0x21b2,
+    'Leftarrow'              : 0x21d0,
+    'Leftrightarrow'         : 0x21d4,
+    'Lleftarrow'             : 0x21da,
+    'Longleftarrow'          : 0x27f8,
+    'Longleftrightarrow'     : 0x27fa,
+    'Longrightarrow'         : 0x27f9,
+    'Lsh'                    : 0x21b0,
+    'Nearrow'                : 0x21d7,
+    'Nwarrow'                : 0x21d6,
+    'O'                      : 0xd8,
+    'OE'                     : 0x152,
+    'Omega'                  : 0x3a9,
+    'P'                      : 0xb6,
+    'Phi'                    : 0x3a6,
+    'Pi'                     : 0x3a0,
+    'Psi'                    : 0x3a8,
+    'QED'                    : 0x220e,
+    'Rdsh'                   : 0x21b3,
+    'Re'                     : 0x211c,
+    'Rightarrow'             : 0x21d2,
+    'Rrightarrow'            : 0x21db,
+    'Rsh'                    : 0x21b1,
+    'S'                      : 0xa7,
+    'Searrow'                : 0x21d8,
+    'Sigma'                  : 0x3a3,
+    'Subset'                 : 0x22d0,
+    'Supset'                 : 0x22d1,
+    'Swarrow'                : 0x21d9,
+    'Theta'                  : 0x398,
+    'Thorn'                  : 0xde,
+    'Uparrow'                : 0x21d1,
+    'Updownarrow'            : 0x21d5,
+    'Upsilon'                : 0x3a5,
+    'Vdash'                  : 0x22a9,
+    'Vert'                   : 0x2016,
+    'Vvdash'                 : 0x22aa,
+    'Xi'                     : 0x39e,
+    '_'                      : 0x5f,
+    '__sqrt__'               : 0x221a,
+    'aa'                     : 0xe5,
+    'ac'                     : 0x223e,
+    'acute'                  : 0x301,
+    'acwopencirclearrow'     : 0x21ba,
+    'adots'                  : 0x22f0,
+    'ae'                     : 0xe6,
+    'aleph'                  : 0x2135,
+    'alpha'                  : 0x3b1,
+    'amalg'                  : 0x2a3f,
+    'angle'                  : 0x2220,
+    'approx'                 : 0x2248,
+    'approxeq'               : 0x224a,
+    'approxident'            : 0x224b,
+    'arceq'                  : 0x2258,
+    'ast'                    : 0x2217,
+    'asterisk'               : 0x2a,
+    'asymp'                  : 0x224d,
+    'backcong'               : 0x224c,
+    'backepsilon'            : 0x3f6,
+    'backprime'              : 0x2035,
+    'backsim'                : 0x223d,
+    'backsimeq'              : 0x22cd,
+    'backslash'              : 0x5c,
+    'bagmember'              : 0x22ff,
+    'bar'                    : 0x304,
+    'barleftarrow'           : 0x21e4,
+    'barvee'                 : 0x22bd,
+    'barwedge'               : 0x22bc,
+    'because'                : 0x2235,
+    'beta'                   : 0x3b2,
+    'beth'                   : 0x2136,
+    'between'                : 0x226c,
+    'bigcap'                 : 0x22c2,
+    'bigcirc'                : 0x25cb,
+    'bigcup'                 : 0x22c3,
+    'bigodot'                : 0x2a00,
+    'bigoplus'               : 0x2a01,
+    'bigotimes'              : 0x2a02,
+    'bigsqcup'               : 0x2a06,
+    'bigstar'                : 0x2605,
+    'bigtriangledown'        : 0x25bd,
+    'bigtriangleup'          : 0x25b3,
+    'biguplus'               : 0x2a04,
+    'bigvee'                 : 0x22c1,
+    'bigwedge'               : 0x22c0,
+    'blacksquare'            : 0x25a0,
+    'blacktriangle'          : 0x25b4,
+    'blacktriangledown'      : 0x25be,
+    'blacktriangleleft'      : 0x25c0,
+    'blacktriangleright'     : 0x25b6,
+    'bot'                    : 0x22a5,
+    'bowtie'                 : 0x22c8,
+    'boxbar'                 : 0x25eb,
+    'boxdot'                 : 0x22a1,
+    'boxminus'               : 0x229f,
+    'boxplus'                : 0x229e,
+    'boxtimes'               : 0x22a0,
+    'breve'                  : 0x306,
+    'bullet'                 : 0x2219,
+    'bumpeq'                 : 0x224f,
+    'c'                      : 0x327,
+    'candra'                 : 0x310,
+    'cap'                    : 0x2229,
+    'carriagereturn'         : 0x21b5,
+    'cdot'                   : 0x22c5,
+    'cdotp'                  : 0xb7,
+    'cdots'                  : 0x22ef,
+    'cent'                   : 0xa2,
+    'check'                  : 0x30c,
+    'checkmark'              : 0x2713,
+    'chi'                    : 0x3c7,
+    'circ'                   : 0x2218,
+    'circeq'                 : 0x2257,
+    'circlearrowleft'        : 0x21ba,
+    'circlearrowright'       : 0x21bb,
+    'circledR'               : 0xae,
+    'circledS'               : 0x24c8,
+    'circledast'             : 0x229b,
+    'circledcirc'            : 0x229a,
+    'circleddash'            : 0x229d,
+    'circumflexaccent'       : 0x302,
+    'clubsuit'               : 0x2663,
+    'clubsuitopen'           : 0x2667,
+    'colon'                  : 0x3a,
+    'coloneq'                : 0x2254,
+    'combiningacuteaccent'   : 0x301,
+    'combiningbreve'         : 0x306,
+    'combiningdiaeresis'     : 0x308,
+    'combiningdotabove'      : 0x307,
+    'combiningfourdotsabove' : 0x20dc,
+    'combininggraveaccent'   : 0x300,
+    'combiningoverline'      : 0x304,
+    'combiningrightarrowabove' : 0x20d7,
+    'combiningthreedotsabove' : 0x20db,
+    'combiningtilde'         : 0x303,
+    'complement'             : 0x2201,
+    'cong'                   : 0x2245,
+    'coprod'                 : 0x2210,
+    'copyright'              : 0xa9,
+    'cup'                    : 0x222a,
+    'cupdot'                 : 0x228d,
+    'cupleftarrow'           : 0x228c,
+    'curlyeqprec'            : 0x22de,
+    'curlyeqsucc'            : 0x22df,
+    'curlyvee'               : 0x22ce,
+    'curlywedge'             : 0x22cf,
+    'curvearrowleft'         : 0x21b6,
+    'curvearrowright'        : 0x21b7,
+    'cwopencirclearrow'      : 0x21bb,
+    'd'                      : 0x323,
+    'dag'                    : 0x2020,
+    'dagger'                 : 0x2020,
+    'daleth'                 : 0x2138,
+    'danger'                 : 0x2621,
+    'dashleftarrow'          : 0x290e,
+    'dashrightarrow'         : 0x290f,
+    'dashv'                  : 0x22a3,
+    'ddag'                   : 0x2021,
+    'ddagger'                : 0x2021,
+    'ddddot'                 : 0x20dc,
+    'dddot'                  : 0x20db,
+    'ddot'                   : 0x308,
+    'ddots'                  : 0x22f1,
+    'degree'                 : 0xb0,
+    'delta'                  : 0x3b4,
+    'dh'                     : 0xf0,
+    'diamond'                : 0x22c4,
+    'diamondsuit'            : 0x2662,
+    'digamma'                : 0x3dd,
+    'disin'                  : 0x22f2,
+    'div'                    : 0xf7,
+    'divideontimes'          : 0x22c7,
+    'dot'                    : 0x307,
+    'doteq'                  : 0x2250,
+    'doteqdot'               : 0x2251,
+    'dotminus'               : 0x2238,
+    'dotplus'                : 0x2214,
+    'dots'                   : 0x2026,
+    'dotsminusdots'          : 0x223a,
+    'doublebarwedge'         : 0x2306,
+    'downarrow'              : 0x2193,
+    'downdownarrows'         : 0x21ca,
+    'downharpoonleft'        : 0x21c3,
+    'downharpoonright'       : 0x21c2,
+    'downzigzagarrow'        : 0x21af,
+    'ell'                    : 0x2113,
+    'emdash'                 : 0x2014,
+    'emptyset'               : 0x2205,
+    'endash'                 : 0x2013,
+    'epsilon'                : 0x3b5,
+    'eqcirc'                 : 0x2256,
+    'eqcolon'                : 0x2255,
+    'eqdef'                  : 0x225d,
+    'eqgtr'                  : 0x22dd,
+    'eqless'                 : 0x22dc,
+    'eqsim'                  : 0x2242,
+    'eqslantgtr'             : 0x2a96,
+    'eqslantless'            : 0x2a95,
+    'equal'                  : 0x3d,
+    'equalparallel'          : 0x22d5,
+    'equiv'                  : 0x2261,
+    'eta'                    : 0x3b7,
+    'eth'                    : 0xf0,
+    'exists'                 : 0x2203,
+    'fallingdotseq'          : 0x2252,
+    'flat'                   : 0x266d,
+    'forall'                 : 0x2200,
+    'frakC'                  : 0x212d,
+    'frakZ'                  : 0x2128,
+    'frown'                  : 0x2322,
+    'gamma'                  : 0x3b3,
+    'geq'                    : 0x2265,
+    'geqq'                   : 0x2267,
+    'geqslant'               : 0x2a7e,
+    'gg'                     : 0x226b,
+    'ggg'                    : 0x22d9,
+    'gimel'                  : 0x2137,
+    'gnapprox'               : 0x2a8a,
+    'gneqq'                  : 0x2269,
+    'gnsim'                  : 0x22e7,
+    'grave'                  : 0x300,
+    'greater'                : 0x3e,
+    'gtrapprox'              : 0x2a86,
+    'gtrdot'                 : 0x22d7,
+    'gtreqless'              : 0x22db,
+    'gtreqqless'             : 0x2a8c,
+    'gtrless'                : 0x2277,
+    'gtrsim'                 : 0x2273,
+    'guillemotleft'          : 0xab,
+    'guillemotright'         : 0xbb,
+    'guilsinglleft'          : 0x2039,
+    'guilsinglright'         : 0x203a,
+    'hat'                    : 0x302,
+    'hbar'                   : 0x127,
+    'heartsuit'              : 0x2661,
+    'hermitmatrix'           : 0x22b9,
+    'hookleftarrow'          : 0x21a9,
+    'hookrightarrow'         : 0x21aa,
+    'hslash'                 : 0x210f,
+    'i'                      : 0x131,
+    'iiiint'                 : 0x2a0c,
+    'iiint'                  : 0x222d,
+    'iint'                   : 0x222c,
+    'imageof'                : 0x22b7,
+    'imath'                  : 0x131,
+    'in'                     : 0x2208,
+    'increment'              : 0x2206,
+    'infty'                  : 0x221e,
+    'int'                    : 0x222b,
+    'intercal'               : 0x22ba,
+    'invnot'                 : 0x2310,
+    'iota'                   : 0x3b9,
+    'isinE'                  : 0x22f9,
+    'isindot'                : 0x22f5,
+    'isinobar'               : 0x22f7,
+    'isins'                  : 0x22f4,
+    'isinvb'                 : 0x22f8,
+    'jmath'                  : 0x237,
+    'k'                      : 0x328,
+    'kappa'                  : 0x3ba,
+    'kernelcontraction'      : 0x223b,
+    'l'                      : 0x142,
+    'lambda'                 : 0x3bb,
+    'lambdabar'              : 0x19b,
+    'langle'                 : 0x27e8,
+    'lasp'                   : 0x2bd,
+    'lbrace'                 : 0x7b,
+    'lbrack'                 : 0x5b,
+    'lceil'                  : 0x2308,
+    'ldots'                  : 0x2026,
+    'leadsto'                : 0x21dd,
+    'leftarrow'              : 0x2190,
+    'leftarrowtail'          : 0x21a2,
+    'leftbrace'              : 0x7b,
+    'leftharpoonaccent'      : 0x20d0,
+    'leftharpoondown'        : 0x21bd,
+    'leftharpoonup'          : 0x21bc,
+    'leftleftarrows'         : 0x21c7,
+    'leftparen'              : 0x28,
+    'leftrightarrow'         : 0x2194,
+    'leftrightarrows'        : 0x21c6,
+    'leftrightharpoons'      : 0x21cb,
+    'leftrightsquigarrow'    : 0x21ad,
+    'leftsquigarrow'         : 0x219c,
+    'leftthreetimes'         : 0x22cb,
+    'leq'                    : 0x2264,
+    'leqq'                   : 0x2266,
+    'leqslant'               : 0x2a7d,
+    'less'                   : 0x3c,
+    'lessapprox'             : 0x2a85,
+    'lessdot'                : 0x22d6,
+    'lesseqgtr'              : 0x22da,
+    'lesseqqgtr'             : 0x2a8b,
+    'lessgtr'                : 0x2276,
+    'lesssim'                : 0x2272,
+    'lfloor'                 : 0x230a,
+    'lgroup'                 : 0x27ee,
+    'lhd'                    : 0x25c1,
+    'll'                     : 0x226a,
+    'llcorner'               : 0x231e,
+    'lll'                    : 0x22d8,
+    'lnapprox'               : 0x2a89,
+    'lneqq'                  : 0x2268,
+    'lnsim'                  : 0x22e6,
+    'longleftarrow'          : 0x27f5,
+    'longleftrightarrow'     : 0x27f7,
+    'longmapsto'             : 0x27fc,
+    'longrightarrow'         : 0x27f6,
+    'looparrowleft'          : 0x21ab,
+    'looparrowright'         : 0x21ac,
+    'lq'                     : 0x2018,
+    'lrcorner'               : 0x231f,
+    'ltimes'                 : 0x22c9,
+    'macron'                 : 0xaf,
+    'maltese'                : 0x2720,
+    'mapsdown'               : 0x21a7,
+    'mapsfrom'               : 0x21a4,
+    'mapsto'                 : 0x21a6,
+    'mapsup'                 : 0x21a5,
+    'measeq'                 : 0x225e,
+    'measuredangle'          : 0x2221,
+    'measuredrightangle'     : 0x22be,
+    'merge'                  : 0x2a55,
+    'mho'                    : 0x2127,
+    'mid'                    : 0x2223,
+    'minus'                  : 0x2212,
+    'minuscolon'             : 0x2239,
+    'models'                 : 0x22a7,
+    'mp'                     : 0x2213,
+    'mu'                     : 0x3bc,
+    'multimap'               : 0x22b8,
+    'nLeftarrow'             : 0x21cd,
+    'nLeftrightarrow'        : 0x21ce,
+    'nRightarrow'            : 0x21cf,
+    'nVDash'                 : 0x22af,
+    'nVdash'                 : 0x22ae,
+    'nabla'                  : 0x2207,
+    'napprox'                : 0x2249,
+    'natural'                : 0x266e,
+    'ncong'                  : 0x2247,
+    'ne'                     : 0x2260,
+    'nearrow'                : 0x2197,
+    'neg'                    : 0xac,
+    'neq'                    : 0x2260,
+    'nequiv'                 : 0x2262,
+    'nexists'                : 0x2204,
+    'ngeq'                   : 0x2271,
+    'ngtr'                   : 0x226f,
+    'ngtrless'               : 0x2279,
+    'ngtrsim'                : 0x2275,
+    'ni'                     : 0x220b,
+    'niobar'                 : 0x22fe,
+    'nis'                    : 0x22fc,
+    'nisd'                   : 0x22fa,
+    'nleftarrow'             : 0x219a,
+    'nleftrightarrow'        : 0x21ae,
+    'nleq'                   : 0x2270,
+    'nless'                  : 0x226e,
+    'nlessgtr'               : 0x2278,
+    'nlesssim'               : 0x2274,
+    'nmid'                   : 0x2224,
+    'not'                    : 0x338,
+    'notin'                  : 0x2209,
+    'notsmallowns'           : 0x220c,
+    'nparallel'              : 0x2226,
+    'nprec'                  : 0x2280,
+    'npreccurlyeq'           : 0x22e0,
+    'nrightarrow'            : 0x219b,
+    'nsim'                   : 0x2241,
+    'nsimeq'                 : 0x2244,
+    'nsqsubseteq'            : 0x22e2,
+    'nsqsupseteq'            : 0x22e3,
+    'nsubset'                : 0x2284,
+    'nsubseteq'              : 0x2288,
+    'nsucc'                  : 0x2281,
+    'nsucccurlyeq'           : 0x22e1,
+    'nsupset'                : 0x2285,
+    'nsupseteq'              : 0x2289,
+    'ntriangleleft'          : 0x22ea,
+    'ntrianglelefteq'        : 0x22ec,
+    'ntriangleright'         : 0x22eb,
+    'ntrianglerighteq'       : 0x22ed,
+    'nu'                     : 0x3bd,
+    'nvDash'                 : 0x22ad,
+    'nvdash'                 : 0x22ac,
+    'nwarrow'                : 0x2196,
+    'o'                      : 0xf8,
+    'obar'                   : 0x233d,
+    'ocirc'                  : 0x30a,
+    'odot'                   : 0x2299,
+    'oe'                     : 0x153,
+    'oequal'                 : 0x229c,
+    'oiiint'                 : 0x2230,
+    'oiint'                  : 0x222f,
+    'oint'                   : 0x222e,
+    'omega'                  : 0x3c9,
+    'ominus'                 : 0x2296,
+    'oplus'                  : 0x2295,
+    'origof'                 : 0x22b6,
+    'oslash'                 : 0x2298,
+    'otimes'                 : 0x2297,
+    'overarc'                : 0x311,
+    'overleftarrow'          : 0x20d6,
+    'overleftrightarrow'     : 0x20e1,
+    'parallel'               : 0x2225,
+    'partial'                : 0x2202,
+    'perp'                   : 0x27c2,
+    'perthousand'            : 0x2030,
+    'phi'                    : 0x3d5,
+    'pi'                     : 0x3c0,
+    'pitchfork'              : 0x22d4,
+    'plus'                   : 0x2b,
+    'pm'                     : 0xb1,
+    'prec'                   : 0x227a,
+    'precapprox'             : 0x2ab7,
+    'preccurlyeq'            : 0x227c,
+    'preceq'                 : 0x227c,
+    'precnapprox'            : 0x2ab9,
+    'precnsim'               : 0x22e8,
+    'precsim'                : 0x227e,
+    'prime'                  : 0x2032,
+    'prod'                   : 0x220f,
+    'propto'                 : 0x221d,
+    'prurel'                 : 0x22b0,
+    'psi'                    : 0x3c8,
+    'quad'                   : 0x2003,
+    'questeq'                : 0x225f,
+    'rangle'                 : 0x27e9,
+    'rasp'                   : 0x2bc,
+    'ratio'                  : 0x2236,
+    'rbrace'                 : 0x7d,
+    'rbrack'                 : 0x5d,
+    'rceil'                  : 0x2309,
+    'rfloor'                 : 0x230b,
+    'rgroup'                 : 0x27ef,
+    'rhd'                    : 0x25b7,
+    'rho'                    : 0x3c1,
+    'rightModels'            : 0x22ab,
+    'rightangle'             : 0x221f,
+    'rightarrow'             : 0x2192,
+    'rightarrowbar'          : 0x21e5,
+    'rightarrowtail'         : 0x21a3,
+    'rightassert'            : 0x22a6,
+    'rightbrace'             : 0x7d,
+    'rightharpoonaccent'     : 0x20d1,
+    'rightharpoondown'       : 0x21c1,
+    'rightharpoonup'         : 0x21c0,
+    'rightleftarrows'        : 0x21c4,
+    'rightleftharpoons'      : 0x21cc,
+    'rightparen'             : 0x29,
+    'rightrightarrows'       : 0x21c9,
+    'rightsquigarrow'        : 0x219d,
+    'rightthreetimes'        : 0x22cc,
+    'rightzigzagarrow'       : 0x21dd,
+    'ring'                   : 0x2da,
+    'risingdotseq'           : 0x2253,
+    'rq'                     : 0x2019,
+    'rtimes'                 : 0x22ca,
+    'scrB'                   : 0x212c,
+    'scrE'                   : 0x2130,
+    'scrF'                   : 0x2131,
+    'scrH'                   : 0x210b,
+    'scrI'                   : 0x2110,
+    'scrL'                   : 0x2112,
+    'scrM'                   : 0x2133,
+    'scrR'                   : 0x211b,
+    'scre'                   : 0x212f,
+    'scrg'                   : 0x210a,
+    'scro'                   : 0x2134,
+    'scurel'                 : 0x22b1,
+    'searrow'                : 0x2198,
+    'setminus'               : 0x2216,
+    'sharp'                  : 0x266f,
+    'sigma'                  : 0x3c3,
+    'sim'                    : 0x223c,
+    'simeq'                  : 0x2243,
+    'simneqq'                : 0x2246,
+    'sinewave'               : 0x223f,
+    'slash'                  : 0x2215,
+    'smallin'                : 0x220a,
+    'smallintclockwise'      : 0x2231,
+    'smallointctrcclockwise' : 0x2233,
+    'smallowns'              : 0x220d,
+    'smallsetminus'          : 0x2216,
+    'smallvarointclockwise'  : 0x2232,
+    'smile'                  : 0x2323,
+    'solbar'                 : 0x233f,
+    'spadesuit'              : 0x2660,
+    'spadesuitopen'          : 0x2664,
+    'sphericalangle'         : 0x2222,
+    'sqcap'                  : 0x2293,
+    'sqcup'                  : 0x2294,
+    'sqsubset'               : 0x228f,
+    'sqsubseteq'             : 0x2291,
+    'sqsubsetneq'            : 0x22e4,
+    'sqsupset'               : 0x2290,
+    'sqsupseteq'             : 0x2292,
+    'sqsupsetneq'            : 0x22e5,
+    'ss'                     : 0xdf,
+    'star'                   : 0x22c6,
+    'stareq'                 : 0x225b,
+    'sterling'               : 0xa3,
+    'subset'                 : 0x2282,
+    'subseteq'               : 0x2286,
+    'subseteqq'              : 0x2ac5,
+    'subsetneq'              : 0x228a,
+    'subsetneqq'             : 0x2acb,
+    'succ'                   : 0x227b,
+    'succapprox'             : 0x2ab8,
+    'succcurlyeq'            : 0x227d,
+    'succeq'                 : 0x227d,
+    'succnapprox'            : 0x2aba,
+    'succnsim'               : 0x22e9,
+    'succsim'                : 0x227f,
+    'sum'                    : 0x2211,
+    'supset'                 : 0x2283,
+    'supseteq'               : 0x2287,
+    'supseteqq'              : 0x2ac6,
+    'supsetneq'              : 0x228b,
+    'supsetneqq'             : 0x2acc,
+    'swarrow'                : 0x2199,
+    't'                      : 0x361,
+    'tau'                    : 0x3c4,
+    'textasciiacute'         : 0xb4,
+    'textasciicircum'        : 0x5e,
+    'textasciigrave'         : 0x60,
+    'textasciitilde'         : 0x7e,
+    'textexclamdown'         : 0xa1,
+    'textquestiondown'       : 0xbf,
+    'textquotedblleft'       : 0x201c,
+    'textquotedblright'      : 0x201d,
+    'therefore'              : 0x2234,
+    'theta'                  : 0x3b8,
+    'thickspace'             : 0x2005,
+    'thorn'                  : 0xfe,
+    'tilde'                  : 0x303,
+    'times'                  : 0xd7,
+    'to'                     : 0x2192,
+    'top'                    : 0x22a4,
+    'triangle'               : 0x25b3,
+    'triangledown'           : 0x25bf,
+    'triangleeq'             : 0x225c,
+    'triangleleft'           : 0x25c1,
+    'trianglelefteq'         : 0x22b4,
+    'triangleq'              : 0x225c,
+    'triangleright'          : 0x25b7,
+    'trianglerighteq'        : 0x22b5,
+    'turnednot'              : 0x2319,
+    'twoheaddownarrow'       : 0x21a1,
+    'twoheadleftarrow'       : 0x219e,
+    'twoheadrightarrow'      : 0x21a0,
+    'twoheaduparrow'         : 0x219f,
+    'ulcorner'               : 0x231c,
+    'underbar'               : 0x331,
+    'unlhd'                  : 0x22b4,
+    'unrhd'                  : 0x22b5,
+    'uparrow'                : 0x2191,
+    'updownarrow'            : 0x2195,
+    'updownarrowbar'         : 0x21a8,
+    'updownarrows'           : 0x21c5,
+    'upharpoonleft'          : 0x21bf,
+    'upharpoonright'         : 0x21be,
+    'uplus'                  : 0x228e,
+    'upsilon'                : 0x3c5,
+    'upuparrows'             : 0x21c8,
+    'urcorner'               : 0x231d,
+    'vDash'                  : 0x22a8,
+    'varepsilon'             : 0x3b5,
+    'varisinobar'            : 0x22f6,
+    'varisins'               : 0x22f3,
+    'varkappa'               : 0x3f0,
+    'varlrtriangle'          : 0x22bf,
+    'varniobar'              : 0x22fd,
+    'varnis'                 : 0x22fb,
+    'varnothing'             : 0x2205,
+    'varphi'                 : 0x3c6,
+    'varpi'                  : 0x3d6,
+    'varpropto'              : 0x221d,
+    'varrho'                 : 0x3f1,
+    'varsigma'               : 0x3c2,
+    'vartheta'               : 0x3d1,
+    'vartriangle'            : 0x25b5,
+    'vartriangleleft'        : 0x22b2,
+    'vartriangleright'       : 0x22b3,
+    'vdash'                  : 0x22a2,
+    'vdots'                  : 0x22ee,
+    'vec'                    : 0x20d7,
+    'vee'                    : 0x2228,
+    'veebar'                 : 0x22bb,
+    'veeeq'                  : 0x225a,
+    'vert'                   : 0x7c,
+    'wedge'                  : 0x2227,
+    'wedgeq'                 : 0x2259,
+    'widebar'                : 0x305,
+    'widehat'                : 0x302,
+    'widetilde'              : 0x303,
+    'wp'                     : 0x2118,
+    'wr'                     : 0x2240,
+    'xi'                     : 0x3be,
+    'yen'                    : 0xa5,
+    'zeta'                   : 0x3b6,
+    '{'                      : 0x7b,
+    '|'                      : 0x2016,
+    '}'                      : 0x7d,
+}
+
+# Each element is a 4-tuple of the form:
+#   src_start, src_end, dst_font, dst_start
+
+_EntryTypeIn = tuple[str, str, str, str | int]
+_EntryTypeOut = tuple[int, int, str, int]
+
+_stix_virtual_fonts: dict[str, dict[str, list[_EntryTypeIn]] | list[_EntryTypeIn]] = {
+    'bb': {
+        "rm": [
+            ("\N{DIGIT ZERO}",
+             "\N{DIGIT NINE}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK DIGIT ZERO}"),
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER B}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL A}"),
+            ("\N{LATIN CAPITAL LETTER C}",
+             "\N{LATIN CAPITAL LETTER C}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL C}"),
+            ("\N{LATIN CAPITAL LETTER D}",
+             "\N{LATIN CAPITAL LETTER G}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL D}"),
+            ("\N{LATIN CAPITAL LETTER H}",
+             "\N{LATIN CAPITAL LETTER H}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL H}"),
+            ("\N{LATIN CAPITAL LETTER I}",
+             "\N{LATIN CAPITAL LETTER M}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL I}"),
+            ("\N{LATIN CAPITAL LETTER N}",
+             "\N{LATIN CAPITAL LETTER N}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL N}"),
+            ("\N{LATIN CAPITAL LETTER O}",
+             "\N{LATIN CAPITAL LETTER O}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL O}"),
+            ("\N{LATIN CAPITAL LETTER P}",
+             "\N{LATIN CAPITAL LETTER Q}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL P}"),
+            ("\N{LATIN CAPITAL LETTER R}",
+             "\N{LATIN CAPITAL LETTER R}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL R}"),
+            ("\N{LATIN CAPITAL LETTER S}",
+             "\N{LATIN CAPITAL LETTER Y}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL S}"),
+            ("\N{LATIN CAPITAL LETTER Z}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL Z}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK SMALL A}"),
+            ("\N{GREEK CAPITAL LETTER GAMMA}",
+             "\N{GREEK CAPITAL LETTER GAMMA}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL GAMMA}"),
+            ("\N{GREEK CAPITAL LETTER PI}",
+             "\N{GREEK CAPITAL LETTER PI}",
+             "rm",
+             "\N{DOUBLE-STRUCK CAPITAL PI}"),
+            ("\N{GREEK CAPITAL LETTER SIGMA}",
+             "\N{GREEK CAPITAL LETTER SIGMA}",
+             "rm",
+             "\N{DOUBLE-STRUCK N-ARY SUMMATION}"),
+            ("\N{GREEK SMALL LETTER GAMMA}",
+             "\N{GREEK SMALL LETTER GAMMA}",
+             "rm",
+             "\N{DOUBLE-STRUCK SMALL GAMMA}"),
+            ("\N{GREEK SMALL LETTER PI}",
+             "\N{GREEK SMALL LETTER PI}",
+             "rm",
+             "\N{DOUBLE-STRUCK SMALL PI}"),
+        ],
+        "it": [
+            ("\N{DIGIT ZERO}",
+             "\N{DIGIT NINE}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK DIGIT ZERO}"),
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER B}",
+             "it",
+             0xe154),
+            ("\N{LATIN CAPITAL LETTER C}",
+             "\N{LATIN CAPITAL LETTER C}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL C}"),
+            ("\N{LATIN CAPITAL LETTER D}",
+             "\N{LATIN CAPITAL LETTER D}",
+             "it",
+             "\N{DOUBLE-STRUCK ITALIC CAPITAL D}"),
+            ("\N{LATIN CAPITAL LETTER E}",
+             "\N{LATIN CAPITAL LETTER G}",
+             "it",
+             0xe156),
+            ("\N{LATIN CAPITAL LETTER H}",
+             "\N{LATIN CAPITAL LETTER H}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL H}"),
+            ("\N{LATIN CAPITAL LETTER I}",
+             "\N{LATIN CAPITAL LETTER M}",
+             "it",
+             0xe159),
+            ("\N{LATIN CAPITAL LETTER N}",
+             "\N{LATIN CAPITAL LETTER N}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL N}"),
+            ("\N{LATIN CAPITAL LETTER O}",
+             "\N{LATIN CAPITAL LETTER O}",
+             "it",
+             0xe15e),
+            ("\N{LATIN CAPITAL LETTER P}",
+             "\N{LATIN CAPITAL LETTER Q}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL P}"),
+            ("\N{LATIN CAPITAL LETTER R}",
+             "\N{LATIN CAPITAL LETTER R}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL R}"),
+            ("\N{LATIN CAPITAL LETTER S}",
+             "\N{LATIN CAPITAL LETTER Y}",
+             "it",
+             0xe15f),
+            ("\N{LATIN CAPITAL LETTER Z}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL Z}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER C}",
+             "it",
+             0xe166),
+            ("\N{LATIN SMALL LETTER D}",
+             "\N{LATIN SMALL LETTER E}",
+             "it",
+             "\N{DOUBLE-STRUCK ITALIC SMALL D}"),
+            ("\N{LATIN SMALL LETTER F}",
+             "\N{LATIN SMALL LETTER H}",
+             "it",
+             0xe169),
+            ("\N{LATIN SMALL LETTER I}",
+             "\N{LATIN SMALL LETTER J}",
+             "it",
+             "\N{DOUBLE-STRUCK ITALIC SMALL I}"),
+            ("\N{LATIN SMALL LETTER K}",
+             "\N{LATIN SMALL LETTER Z}",
+             "it",
+             0xe16c),
+            ("\N{GREEK CAPITAL LETTER GAMMA}",
+             "\N{GREEK CAPITAL LETTER GAMMA}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL GAMMA}"),  # \Gamma (not in beta STIX fonts)
+            ("\N{GREEK CAPITAL LETTER PI}",
+             "\N{GREEK CAPITAL LETTER PI}",
+             "it",
+             "\N{DOUBLE-STRUCK CAPITAL PI}"),
+            ("\N{GREEK CAPITAL LETTER SIGMA}",
+             "\N{GREEK CAPITAL LETTER SIGMA}",
+             "it",
+             "\N{DOUBLE-STRUCK N-ARY SUMMATION}"),  # \Sigma (not in beta STIX fonts)
+            ("\N{GREEK SMALL LETTER GAMMA}",
+             "\N{GREEK SMALL LETTER GAMMA}",
+             "it",
+             "\N{DOUBLE-STRUCK SMALL GAMMA}"),  # \gamma (not in beta STIX fonts)
+            ("\N{GREEK SMALL LETTER PI}",
+             "\N{GREEK SMALL LETTER PI}",
+             "it",
+             "\N{DOUBLE-STRUCK SMALL PI}"),
+        ],
+        "bf": [
+            ("\N{DIGIT ZERO}",
+             "\N{DIGIT NINE}",
+             "rm",
+             "\N{MATHEMATICAL DOUBLE-STRUCK DIGIT ZERO}"),
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER B}",
+             "bf",
+             0xe38a),
+            ("\N{LATIN CAPITAL LETTER C}",
+             "\N{LATIN CAPITAL LETTER C}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL C}"),
+            ("\N{LATIN CAPITAL LETTER D}",
+             "\N{LATIN CAPITAL LETTER D}",
+             "bf",
+             "\N{DOUBLE-STRUCK ITALIC CAPITAL D}"),
+            ("\N{LATIN CAPITAL LETTER E}",
+             "\N{LATIN CAPITAL LETTER G}",
+             "bf",
+             0xe38d),
+            ("\N{LATIN CAPITAL LETTER H}",
+             "\N{LATIN CAPITAL LETTER H}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL H}"),
+            ("\N{LATIN CAPITAL LETTER I}",
+             "\N{LATIN CAPITAL LETTER M}",
+             "bf",
+             0xe390),
+            ("\N{LATIN CAPITAL LETTER N}",
+             "\N{LATIN CAPITAL LETTER N}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL N}"),
+            ("\N{LATIN CAPITAL LETTER O}",
+             "\N{LATIN CAPITAL LETTER O}",
+             "bf",
+             0xe395),
+            ("\N{LATIN CAPITAL LETTER P}",
+             "\N{LATIN CAPITAL LETTER Q}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL P}"),
+            ("\N{LATIN CAPITAL LETTER R}",
+             "\N{LATIN CAPITAL LETTER R}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL R}"),
+            ("\N{LATIN CAPITAL LETTER S}",
+             "\N{LATIN CAPITAL LETTER Y}",
+             "bf",
+             0xe396),
+            ("\N{LATIN CAPITAL LETTER Z}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL Z}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER C}",
+             "bf",
+             0xe39d),
+            ("\N{LATIN SMALL LETTER D}",
+             "\N{LATIN SMALL LETTER E}",
+             "bf",
+             "\N{DOUBLE-STRUCK ITALIC SMALL D}"),
+            ("\N{LATIN SMALL LETTER F}",
+             "\N{LATIN SMALL LETTER H}",
+             "bf",
+             0xe3a2),
+            ("\N{LATIN SMALL LETTER I}",
+             "\N{LATIN SMALL LETTER J}",
+             "bf",
+             "\N{DOUBLE-STRUCK ITALIC SMALL I}"),
+            ("\N{LATIN SMALL LETTER K}",
+             "\N{LATIN SMALL LETTER Z}",
+             "bf",
+             0xe3a7),
+            ("\N{GREEK CAPITAL LETTER GAMMA}",
+             "\N{GREEK CAPITAL LETTER GAMMA}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL GAMMA}"),
+            ("\N{GREEK CAPITAL LETTER PI}",
+             "\N{GREEK CAPITAL LETTER PI}",
+             "bf",
+             "\N{DOUBLE-STRUCK CAPITAL PI}"),
+            ("\N{GREEK CAPITAL LETTER SIGMA}",
+             "\N{GREEK CAPITAL LETTER SIGMA}",
+             "bf",
+             "\N{DOUBLE-STRUCK N-ARY SUMMATION}"),
+            ("\N{GREEK SMALL LETTER GAMMA}",
+             "\N{GREEK SMALL LETTER GAMMA}",
+             "bf",
+             "\N{DOUBLE-STRUCK SMALL GAMMA}"),
+            ("\N{GREEK SMALL LETTER PI}",
+             "\N{GREEK SMALL LETTER PI}",
+             "bf",
+             "\N{DOUBLE-STRUCK SMALL PI}"),
+        ],
+    },
+    'cal': [
+        ("\N{LATIN CAPITAL LETTER A}",
+         "\N{LATIN CAPITAL LETTER Z}",
+         "it",
+         0xe22d),
+    ],
+    'frak': {
+        "rm": [
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER B}",
+             "rm",
+             "\N{MATHEMATICAL FRAKTUR CAPITAL A}"),
+            ("\N{LATIN CAPITAL LETTER C}",
+             "\N{LATIN CAPITAL LETTER C}",
+             "rm",
+             "\N{BLACK-LETTER CAPITAL C}"),
+            ("\N{LATIN CAPITAL LETTER D}",
+             "\N{LATIN CAPITAL LETTER G}",
+             "rm",
+             "\N{MATHEMATICAL FRAKTUR CAPITAL D}"),
+            ("\N{LATIN CAPITAL LETTER H}",
+             "\N{LATIN CAPITAL LETTER H}",
+             "rm",
+             "\N{BLACK-LETTER CAPITAL H}"),
+            ("\N{LATIN CAPITAL LETTER I}",
+             "\N{LATIN CAPITAL LETTER I}",
+             "rm",
+             "\N{BLACK-LETTER CAPITAL I}"),
+            ("\N{LATIN CAPITAL LETTER J}",
+             "\N{LATIN CAPITAL LETTER Q}",
+             "rm",
+             "\N{MATHEMATICAL FRAKTUR CAPITAL J}"),
+            ("\N{LATIN CAPITAL LETTER R}",
+             "\N{LATIN CAPITAL LETTER R}",
+             "rm",
+             "\N{BLACK-LETTER CAPITAL R}"),
+            ("\N{LATIN CAPITAL LETTER S}",
+             "\N{LATIN CAPITAL LETTER Y}",
+             "rm",
+             "\N{MATHEMATICAL FRAKTUR CAPITAL S}"),
+            ("\N{LATIN CAPITAL LETTER Z}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "rm",
+             "\N{BLACK-LETTER CAPITAL Z}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "rm",
+             "\N{MATHEMATICAL FRAKTUR SMALL A}"),
+            ],
+        "bf": [
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "bf",
+             "\N{MATHEMATICAL BOLD FRAKTUR CAPITAL A}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "bf",
+             "\N{MATHEMATICAL BOLD FRAKTUR SMALL A}"),
+        ],
+    },
+    'scr': [
+        ("\N{LATIN CAPITAL LETTER A}",
+         "\N{LATIN CAPITAL LETTER A}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT CAPITAL A}"),
+        ("\N{LATIN CAPITAL LETTER B}",
+         "\N{LATIN CAPITAL LETTER B}",
+         "it",
+         "\N{SCRIPT CAPITAL B}"),
+        ("\N{LATIN CAPITAL LETTER C}",
+         "\N{LATIN CAPITAL LETTER D}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT CAPITAL C}"),
+        ("\N{LATIN CAPITAL LETTER E}",
+         "\N{LATIN CAPITAL LETTER F}",
+         "it",
+         "\N{SCRIPT CAPITAL E}"),
+        ("\N{LATIN CAPITAL LETTER G}",
+         "\N{LATIN CAPITAL LETTER G}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT CAPITAL G}"),
+        ("\N{LATIN CAPITAL LETTER H}",
+         "\N{LATIN CAPITAL LETTER H}",
+         "it",
+         "\N{SCRIPT CAPITAL H}"),
+        ("\N{LATIN CAPITAL LETTER I}",
+         "\N{LATIN CAPITAL LETTER I}",
+         "it",
+         "\N{SCRIPT CAPITAL I}"),
+        ("\N{LATIN CAPITAL LETTER J}",
+         "\N{LATIN CAPITAL LETTER K}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT CAPITAL J}"),
+        ("\N{LATIN CAPITAL LETTER L}",
+         "\N{LATIN CAPITAL LETTER L}",
+         "it",
+         "\N{SCRIPT CAPITAL L}"),
+        ("\N{LATIN CAPITAL LETTER M}",
+         "\N{LATIN CAPITAL LETTER M}",
+         "it",
+         "\N{SCRIPT CAPITAL M}"),
+        ("\N{LATIN CAPITAL LETTER N}",
+         "\N{LATIN CAPITAL LETTER Q}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT CAPITAL N}"),
+        ("\N{LATIN CAPITAL LETTER R}",
+         "\N{LATIN CAPITAL LETTER R}",
+         "it",
+         "\N{SCRIPT CAPITAL R}"),
+        ("\N{LATIN CAPITAL LETTER S}",
+         "\N{LATIN CAPITAL LETTER Z}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT CAPITAL S}"),
+        ("\N{LATIN SMALL LETTER A}",
+         "\N{LATIN SMALL LETTER D}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT SMALL A}"),
+        ("\N{LATIN SMALL LETTER E}",
+         "\N{LATIN SMALL LETTER E}",
+         "it",
+         "\N{SCRIPT SMALL E}"),
+        ("\N{LATIN SMALL LETTER F}",
+         "\N{LATIN SMALL LETTER F}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT SMALL F}"),
+        ("\N{LATIN SMALL LETTER G}",
+         "\N{LATIN SMALL LETTER G}",
+         "it",
+         "\N{SCRIPT SMALL G}"),
+        ("\N{LATIN SMALL LETTER H}",
+         "\N{LATIN SMALL LETTER N}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT SMALL H}"),
+        ("\N{LATIN SMALL LETTER O}",
+         "\N{LATIN SMALL LETTER O}",
+         "it",
+         "\N{SCRIPT SMALL O}"),
+        ("\N{LATIN SMALL LETTER P}",
+         "\N{LATIN SMALL LETTER Z}",
+         "it",
+         "\N{MATHEMATICAL SCRIPT SMALL P}"),
+    ],
+    'sf': {
+        "rm": [
+            ("\N{DIGIT ZERO}",
+             "\N{DIGIT NINE}",
+             "rm",
+             "\N{MATHEMATICAL SANS-SERIF DIGIT ZERO}"),
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "rm",
+             "\N{MATHEMATICAL SANS-SERIF CAPITAL A}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "rm",
+             "\N{MATHEMATICAL SANS-SERIF SMALL A}"),
+            ("\N{GREEK CAPITAL LETTER ALPHA}",
+             "\N{GREEK CAPITAL LETTER OMEGA}",
+             "rm",
+             0xe17d),
+            ("\N{GREEK SMALL LETTER ALPHA}",
+             "\N{GREEK SMALL LETTER OMEGA}",
+             "rm",
+             0xe196),
+            ("\N{GREEK THETA SYMBOL}",
+             "\N{GREEK THETA SYMBOL}",
+             "rm",
+             0xe1b0),
+            ("\N{GREEK PHI SYMBOL}",
+             "\N{GREEK PHI SYMBOL}",
+             "rm",
+             0xe1b1),
+            ("\N{GREEK PI SYMBOL}",
+             "\N{GREEK PI SYMBOL}",
+             "rm",
+             0xe1b3),
+            ("\N{GREEK RHO SYMBOL}",
+             "\N{GREEK RHO SYMBOL}",
+             "rm",
+             0xe1b2),
+            ("\N{GREEK LUNATE EPSILON SYMBOL}",
+             "\N{GREEK LUNATE EPSILON SYMBOL}",
+             "rm",
+             0xe1af),
+            ("\N{PARTIAL DIFFERENTIAL}",
+             "\N{PARTIAL DIFFERENTIAL}",
+             "rm",
+             0xe17c),
+        ],
+        "it": [
+            # These numerals are actually upright.  We don't actually
+            # want italic numerals ever.
+            ("\N{DIGIT ZERO}",
+             "\N{DIGIT NINE}",
+             "rm",
+             "\N{MATHEMATICAL SANS-SERIF DIGIT ZERO}"),
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "it",
+             "\N{MATHEMATICAL SANS-SERIF ITALIC CAPITAL A}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "it",
+             "\N{MATHEMATICAL SANS-SERIF ITALIC SMALL A}"),
+            ("\N{GREEK CAPITAL LETTER ALPHA}",
+             "\N{GREEK CAPITAL LETTER OMEGA}",
+             "rm",
+             0xe17d),
+            ("\N{GREEK SMALL LETTER ALPHA}",
+             "\N{GREEK SMALL LETTER OMEGA}",
+             "it",
+             0xe1d8),
+            ("\N{GREEK THETA SYMBOL}",
+             "\N{GREEK THETA SYMBOL}",
+             "it",
+             0xe1f2),
+            ("\N{GREEK PHI SYMBOL}",
+             "\N{GREEK PHI SYMBOL}",
+             "it",
+             0xe1f3),
+            ("\N{GREEK PI SYMBOL}",
+             "\N{GREEK PI SYMBOL}",
+             "it",
+             0xe1f5),
+            ("\N{GREEK RHO SYMBOL}",
+             "\N{GREEK RHO SYMBOL}",
+             "it",
+             0xe1f4),
+            ("\N{GREEK LUNATE EPSILON SYMBOL}",
+             "\N{GREEK LUNATE EPSILON SYMBOL}",
+             "it",
+             0xe1f1),
+        ],
+        "bf": [
+            ("\N{DIGIT ZERO}",
+             "\N{DIGIT NINE}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD DIGIT ZERO}"),
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD CAPITAL A}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD SMALL A}"),
+            ("\N{GREEK CAPITAL LETTER ALPHA}",
+             "\N{GREEK CAPITAL LETTER OMEGA}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD CAPITAL ALPHA}"),
+            ("\N{GREEK SMALL LETTER ALPHA}",
+             "\N{GREEK SMALL LETTER OMEGA}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD SMALL ALPHA}"),
+            ("\N{GREEK THETA SYMBOL}",
+             "\N{GREEK THETA SYMBOL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD THETA SYMBOL}"),
+            ("\N{GREEK PHI SYMBOL}",
+             "\N{GREEK PHI SYMBOL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD PHI SYMBOL}"),
+            ("\N{GREEK PI SYMBOL}",
+             "\N{GREEK PI SYMBOL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD PI SYMBOL}"),
+            ("\N{GREEK KAPPA SYMBOL}",
+             "\N{GREEK KAPPA SYMBOL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD KAPPA SYMBOL}"),
+            ("\N{GREEK RHO SYMBOL}",
+             "\N{GREEK RHO SYMBOL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD RHO SYMBOL}"),
+            ("\N{GREEK LUNATE EPSILON SYMBOL}",
+             "\N{GREEK LUNATE EPSILON SYMBOL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD EPSILON SYMBOL}"),
+            ("\N{PARTIAL DIFFERENTIAL}",
+             "\N{PARTIAL DIFFERENTIAL}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD PARTIAL DIFFERENTIAL}"),
+            ("\N{NABLA}",
+             "\N{NABLA}",
+             "bf",
+             "\N{MATHEMATICAL SANS-SERIF BOLD NABLA}"),
+        ],
+        "bfit": [
+            ("\N{LATIN CAPITAL LETTER A}",
+             "\N{LATIN CAPITAL LETTER Z}",
+             "bfit",
+             "\N{MATHEMATICAL BOLD ITALIC CAPITAL A}"),
+            ("\N{LATIN SMALL LETTER A}",
+             "\N{LATIN SMALL LETTER Z}",
+             "bfit",
+             "\N{MATHEMATICAL BOLD ITALIC SMALL A}"),
+            ("\N{GREEK CAPITAL LETTER GAMMA}",
+             "\N{GREEK CAPITAL LETTER OMEGA}",
+             "bfit",
+             "\N{MATHEMATICAL BOLD ITALIC CAPITAL GAMMA}"),
+            ("\N{GREEK SMALL LETTER ALPHA}",
+             "\N{GREEK SMALL LETTER OMEGA}",
+             "bfit",
+             "\N{MATHEMATICAL BOLD ITALIC SMALL ALPHA}"),
+        ],
+    },
+    'tt': [
+        ("\N{DIGIT ZERO}",
+         "\N{DIGIT NINE}",
+         "rm",
+         "\N{MATHEMATICAL MONOSPACE DIGIT ZERO}"),
+        ("\N{LATIN CAPITAL LETTER A}",
+         "\N{LATIN CAPITAL LETTER Z}",
+         "rm",
+         "\N{MATHEMATICAL MONOSPACE CAPITAL A}"),
+        ("\N{LATIN SMALL LETTER A}",
+         "\N{LATIN SMALL LETTER Z}",
+         "rm",
+         "\N{MATHEMATICAL MONOSPACE SMALL A}")
+    ],
+}
+
+
+@overload
+def _normalize_stix_fontcodes(d: _EntryTypeIn) -> _EntryTypeOut: ...
+
+
+@overload
+def _normalize_stix_fontcodes(d: list[_EntryTypeIn]) -> list[_EntryTypeOut]: ...
+
+
+@overload
+def _normalize_stix_fontcodes(d: dict[str, list[_EntryTypeIn] |
+                                      dict[str, list[_EntryTypeIn]]]
+                              ) -> dict[str, list[_EntryTypeOut] |
+                                        dict[str, list[_EntryTypeOut]]]: ...
+
+
+def _normalize_stix_fontcodes(d):
+    if isinstance(d, tuple):
+        return tuple(ord(x) if isinstance(x, str) and len(x) == 1 else x for x in d)
+    elif isinstance(d, list):
+        return [_normalize_stix_fontcodes(x) for x in d]
+    elif isinstance(d, dict):
+        return {k: _normalize_stix_fontcodes(v) for k, v in d.items()}
+
+
+stix_virtual_fonts: dict[str, dict[str, list[_EntryTypeOut]] | list[_EntryTypeOut]]
+stix_virtual_fonts = _normalize_stix_fontcodes(_stix_virtual_fonts)
+
+# Free redundant list now that it has been normalized
+del _stix_virtual_fonts
+
+# Fix some incorrect glyphs.
+stix_glyph_fixes = {
+    # Cap and Cup glyphs are swapped.
+    0x22d2: 0x22d3,
+    0x22d3: 0x22d2,
+}

moondream/lib/python3.10/site-packages/matplotlib/_path.pyi

@@ -0,0 +1,9 @@
+from collections.abc import Sequence
+
+import numpy as np
+
+from .transforms import BboxBase
+
+def affine_transform(points: np.ndarray, trans: np.ndarray) -> np.ndarray: ...
+def count_bboxes_overlapping_bbox(bbox: BboxBase, bboxes: Sequence[BboxBase]) -> int: ...
+def update_path_extents(path, trans, rect, minpos, ignore): ...

moondream/lib/python3.10/site-packages/matplotlib/_tight_bbox.py

@@ -0,0 +1,84 @@
+"""
+Helper module for the *bbox_inches* parameter in `.Figure.savefig`.
+"""
+
+from matplotlib.transforms import Bbox, TransformedBbox, Affine2D
+
+
+def adjust_bbox(fig, bbox_inches, fixed_dpi=None):
+    """
+    Temporarily adjust the figure so that only the specified area
+    (bbox_inches) is saved.
+
+    It modifies fig.bbox, fig.bbox_inches,
+    fig.transFigure._boxout, and fig.patch.  While the figure size
+    changes, the scale of the original figure is conserved.  A
+    function which restores the original values are returned.
+    """
+    origBbox = fig.bbox
+    origBboxInches = fig.bbox_inches
+    _boxout = fig.transFigure._boxout
+
+    old_aspect = []
+    locator_list = []
+    sentinel = object()
+    for ax in fig.axes:
+        locator = ax.get_axes_locator()
+        if locator is not None:
+            ax.apply_aspect(locator(ax, None))
+        locator_list.append(locator)
+        current_pos = ax.get_position(original=False).frozen()
+        ax.set_axes_locator(lambda a, r, _pos=current_pos: _pos)
+        # override the method that enforces the aspect ratio on the Axes
+        if 'apply_aspect' in ax.__dict__:
+            old_aspect.append(ax.apply_aspect)
+        else:
+            old_aspect.append(sentinel)
+        ax.apply_aspect = lambda pos=None: None
+
+    def restore_bbox():
+        for ax, loc, aspect in zip(fig.axes, locator_list, old_aspect):
+            ax.set_axes_locator(loc)
+            if aspect is sentinel:
+                # delete our no-op function which un-hides the original method
+                del ax.apply_aspect
+            else:
+                ax.apply_aspect = aspect
+
+        fig.bbox = origBbox
+        fig.bbox_inches = origBboxInches
+        fig.transFigure._boxout = _boxout
+        fig.transFigure.invalidate()
+        fig.patch.set_bounds(0, 0, 1, 1)
+
+    if fixed_dpi is None:
+        fixed_dpi = fig.dpi
+    tr = Affine2D().scale(fixed_dpi)
+    dpi_scale = fixed_dpi / fig.dpi
+
+    fig.bbox_inches = Bbox.from_bounds(0, 0, *bbox_inches.size)
+    x0, y0 = tr.transform(bbox_inches.p0)
+    w1, h1 = fig.bbox.size * dpi_scale
+    fig.transFigure._boxout = Bbox.from_bounds(-x0, -y0, w1, h1)
+    fig.transFigure.invalidate()
+
+    fig.bbox = TransformedBbox(fig.bbox_inches, tr)
+
+    fig.patch.set_bounds(x0 / w1, y0 / h1,
+                         fig.bbox.width / w1, fig.bbox.height / h1)
+
+    return restore_bbox
+
+
+def process_figure_for_rasterizing(fig, bbox_inches_restore, fixed_dpi=None):
+    """
+    A function that needs to be called when figure dpi changes during the
+    drawing (e.g., rasterizing).  It recovers the bbox and re-adjust it with
+    the new dpi.
+    """
+
+    bbox_inches, restore_bbox = bbox_inches_restore
+    restore_bbox()
+    r = adjust_bbox(fig, bbox_inches, fixed_dpi)
+
+    return bbox_inches, r

moondream/lib/python3.10/site-packages/matplotlib/animation.py

@@ -0,0 +1,1823 @@
+import abc
+import base64
+import contextlib
+from io import BytesIO, TextIOWrapper
+import itertools
+import logging
+from pathlib import Path
+import shutil
+import subprocess
+import sys
+from tempfile import TemporaryDirectory
+import uuid
+import warnings
+
+import numpy as np
+from PIL import Image
+
+import matplotlib as mpl
+from matplotlib._animation_data import (
+    DISPLAY_TEMPLATE, INCLUDED_FRAMES, JS_INCLUDE, STYLE_INCLUDE)
+from matplotlib import _api, cbook
+import matplotlib.colors as mcolors
+
+_log = logging.getLogger(__name__)
+
+# Process creation flag for subprocess to prevent it raising a terminal
+# window. See for example https://stackoverflow.com/q/24130623/
+subprocess_creation_flags = (
+    subprocess.CREATE_NO_WINDOW if sys.platform == 'win32' else 0)
+
+
+def adjusted_figsize(w, h, dpi, n):
+    """
+    Compute figure size so that pixels are a multiple of n.
+
+    Parameters
+    ----------
+    w, h : float
+        Size in inches.
+
+    dpi : float
+        The dpi.
+
+    n : int
+        The target multiple.
+
+    Returns
+    -------
+    wnew, hnew : float
+        The new figure size in inches.
+    """
+
+    # this maybe simplified if / when we adopt consistent rounding for
+    # pixel size across the whole library
+    def correct_roundoff(x, dpi, n):
+        if int(x*dpi) % n != 0:
+            if int(np.nextafter(x, np.inf)*dpi) % n == 0:
+                x = np.nextafter(x, np.inf)
+            elif int(np.nextafter(x, -np.inf)*dpi) % n == 0:
+                x = np.nextafter(x, -np.inf)
+        return x
+
+    wnew = int(w * dpi / n) * n / dpi
+    hnew = int(h * dpi / n) * n / dpi
+    return correct_roundoff(wnew, dpi, n), correct_roundoff(hnew, dpi, n)
+
+
+class MovieWriterRegistry:
+    """Registry of available writer classes by human readable name."""
+
+    def __init__(self):
+        self._registered = dict()
+
+    def register(self, name):
+        """
+        Decorator for registering a class under a name.
+
+        Example use::
+
+            @registry.register(name)
+            class Foo:
+                pass
+        """
+        def wrapper(writer_cls):
+            self._registered[name] = writer_cls
+            return writer_cls
+        return wrapper
+
+    def is_available(self, name):
+        """
+        Check if given writer is available by name.
+
+        Parameters
+        ----------
+        name : str
+
+        Returns
+        -------
+        bool
+        """
+        try:
+            cls = self._registered[name]
+        except KeyError:
+            return False
+        return cls.isAvailable()
+
+    def __iter__(self):
+        """Iterate over names of available writer class."""
+        for name in self._registered:
+            if self.is_available(name):
+                yield name
+
+    def list(self):
+        """Get a list of available MovieWriters."""
+        return [*self]
+
+    def __getitem__(self, name):
+        """Get an available writer class from its name."""
+        if self.is_available(name):
+            return self._registered[name]
+        raise RuntimeError(f"Requested MovieWriter ({name}) not available")
+
+
+writers = MovieWriterRegistry()
+
+
+class AbstractMovieWriter(abc.ABC):
+    """
+    Abstract base class for writing movies, providing a way to grab frames by
+    calling `~AbstractMovieWriter.grab_frame`.
+
+    `setup` is called to start the process and `finish` is called afterwards.
+    `saving` is provided as a context manager to facilitate this process as ::
+
+        with moviewriter.saving(fig, outfile='myfile.mp4', dpi=100):
+            # Iterate over frames
+            moviewriter.grab_frame(**savefig_kwargs)
+
+    The use of the context manager ensures that `setup` and `finish` are
+    performed as necessary.
+
+    An instance of a concrete subclass of this class can be given as the
+    ``writer`` argument of `Animation.save()`.
+    """
+
+    def __init__(self, fps=5, metadata=None, codec=None, bitrate=None):
+        self.fps = fps
+        self.metadata = metadata if metadata is not None else {}
+        self.codec = mpl._val_or_rc(codec, 'animation.codec')
+        self.bitrate = mpl._val_or_rc(bitrate, 'animation.bitrate')
+
+    @abc.abstractmethod
+    def setup(self, fig, outfile, dpi=None):
+        """
+        Setup for writing the movie file.
+
+        Parameters
+        ----------
+        fig : `~matplotlib.figure.Figure`
+            The figure object that contains the information for frames.
+        outfile : str
+            The filename of the resulting movie file.
+        dpi : float, default: ``fig.dpi``
+            The DPI (or resolution) for the file.  This controls the size
+            in pixels of the resulting movie file.
+        """
+        # Check that path is valid
+        Path(outfile).parent.resolve(strict=True)
+        self.outfile = outfile
+        self.fig = fig
+        if dpi is None:
+            dpi = self.fig.dpi
+        self.dpi = dpi
+
+    @property
+    def frame_size(self):
+        """A tuple ``(width, height)`` in pixels of a movie frame."""
+        w, h = self.fig.get_size_inches()
+        return int(w * self.dpi), int(h * self.dpi)
+
+    def _supports_transparency(self):
+        """
+        Whether this writer supports transparency.
+
+        Writers may consult output file type and codec to determine this at runtime.
+        """
+        return False
+
+    @abc.abstractmethod
+    def grab_frame(self, **savefig_kwargs):
+        """
+        Grab the image information from the figure and save as a movie frame.
+
+        All keyword arguments in *savefig_kwargs* are passed on to the
+        `~.Figure.savefig` call that saves the figure.  However, several
+        keyword arguments that are supported by `~.Figure.savefig` may not be
+        passed as they are controlled by the MovieWriter:
+
+        - *dpi*, *bbox_inches*:  These may not be passed because each frame of the
+           animation much be exactly the same size in pixels.
+        - *format*: This is controlled by the MovieWriter.
+        """
+
+    @abc.abstractmethod
+    def finish(self):
+        """Finish any processing for writing the movie."""
+
+    @contextlib.contextmanager
+    def saving(self, fig, outfile, dpi, *args, **kwargs):
+        """
+        Context manager to facilitate writing the movie file.
+
+        ``*args, **kw`` are any parameters that should be passed to `setup`.
+        """
+        if mpl.rcParams['savefig.bbox'] == 'tight':
+            _log.info("Disabling savefig.bbox = 'tight', as it may cause "
+                      "frame size to vary, which is inappropriate for "
+                      "animation.")
+
+        # This particular sequence is what contextlib.contextmanager wants
+        self.setup(fig, outfile, dpi, *args, **kwargs)
+        with mpl.rc_context({'savefig.bbox': None}):
+            try:
+                yield self
+            finally:
+                self.finish()
+
+
+class MovieWriter(AbstractMovieWriter):
+    """
+    Base class for writing movies.
+
+    This is a base class for MovieWriter subclasses that write a movie frame
+    data to a pipe. You cannot instantiate this class directly.
+    See examples for how to use its subclasses.
+
+    Attributes
+    ----------
+    frame_format : str
+        The format used in writing frame data, defaults to 'rgba'.
+    fig : `~matplotlib.figure.Figure`
+        The figure to capture data from.
+        This must be provided by the subclasses.
+    """
+
+    # Builtin writer subclasses additionally define the _exec_key and _args_key
+    # attributes, which indicate the rcParams entries where the path to the
+    # executable and additional command-line arguments to the executable are
+    # stored.  Third-party writers cannot meaningfully set these as they cannot
+    # extend rcParams with new keys.
+
+    # Pipe-based writers only support RGBA, but file-based ones support more
+    # formats.
+    supported_formats = ["rgba"]
+
+    def __init__(self, fps=5, codec=None, bitrate=None, extra_args=None,
+                 metadata=None):
+        """
+        Parameters
+        ----------
+        fps : int, default: 5
+            Movie frame rate (per second).
+        codec : str or None, default: :rc:`animation.codec`
+            The codec to use.
+        bitrate : int, default: :rc:`animation.bitrate`
+            The bitrate of the movie, in kilobits per second.  Higher values
+            means higher quality movies, but increase the file size.  A value
+            of -1 lets the underlying movie encoder select the bitrate.
+        extra_args : list of str or None, optional
+            Extra command-line arguments passed to the underlying movie encoder. These
+            arguments are passed last to the encoder, just before the filename. The
+            default, None, means to use :rc:`animation.[name-of-encoder]_args` for the
+            builtin writers.
+        metadata : dict[str, str], default: {}
+            A dictionary of keys and values for metadata to include in the
+            output file. Some keys that may be of use include:
+            title, artist, genre, subject, copyright, srcform, comment.
+        """
+        if type(self) is MovieWriter:
+            # TODO MovieWriter is still an abstract class and needs to be
+            #      extended with a mixin. This should be clearer in naming
+            #      and description. For now, just give a reasonable error
+            #      message to users.
+            raise TypeError(
+                'MovieWriter cannot be instantiated directly. Please use one '
+                'of its subclasses.')
+
+        super().__init__(fps=fps, metadata=metadata, codec=codec,
+                         bitrate=bitrate)
+        self.frame_format = self.supported_formats[0]
+        self.extra_args = extra_args
+
+    def _adjust_frame_size(self):
+        if self.codec == 'h264':
+            wo, ho = self.fig.get_size_inches()
+            w, h = adjusted_figsize(wo, ho, self.dpi, 2)
+            if (wo, ho) != (w, h):
+                self.fig.set_size_inches(w, h, forward=True)
+                _log.info('figure size in inches has been adjusted '
+                          'from %s x %s to %s x %s', wo, ho, w, h)
+        else:
+            w, h = self.fig.get_size_inches()
+        _log.debug('frame size in pixels is %s x %s', *self.frame_size)
+        return w, h
+
+    def setup(self, fig, outfile, dpi=None):
+        # docstring inherited
+        super().setup(fig, outfile, dpi=dpi)
+        self._w, self._h = self._adjust_frame_size()
+        # Run here so that grab_frame() can write the data to a pipe. This
+        # eliminates the need for temp files.
+        self._run()
+
+    def _run(self):
+        # Uses subprocess to call the program for assembling frames into a
+        # movie file.  *args* returns the sequence of command line arguments
+        # from a few configuration options.
+        command = self._args()
+        _log.info('MovieWriter._run: running command: %s',
+                  cbook._pformat_subprocess(command))
+        PIPE = subprocess.PIPE
+        self._proc = subprocess.Popen(
+            command, stdin=PIPE, stdout=PIPE, stderr=PIPE,
+            creationflags=subprocess_creation_flags)
+
+    def finish(self):
+        """Finish any processing for writing the movie."""
+        out, err = self._proc.communicate()
+        # Use the encoding/errors that universal_newlines would use.
+        out = TextIOWrapper(BytesIO(out)).read()
+        err = TextIOWrapper(BytesIO(err)).read()
+        if out:
+            _log.log(
+                logging.WARNING if self._proc.returncode else logging.DEBUG,
+                "MovieWriter stdout:\n%s", out)
+        if err:
+            _log.log(
+                logging.WARNING if self._proc.returncode else logging.DEBUG,
+                "MovieWriter stderr:\n%s", err)
+        if self._proc.returncode:
+            raise subprocess.CalledProcessError(
+                self._proc.returncode, self._proc.args, out, err)
+
+    def grab_frame(self, **savefig_kwargs):
+        # docstring inherited
+        _validate_grabframe_kwargs(savefig_kwargs)
+        _log.debug('MovieWriter.grab_frame: Grabbing frame.')
+        # Readjust the figure size in case it has been changed by the user.
+        # All frames must have the same size to save the movie correctly.
+        self.fig.set_size_inches(self._w, self._h)
+        # Save the figure data to the sink, using the frame format and dpi.
+        self.fig.savefig(self._proc.stdin, format=self.frame_format,
+                         dpi=self.dpi, **savefig_kwargs)
+
+    def _args(self):
+        """Assemble list of encoder-specific command-line arguments."""
+        return NotImplementedError("args needs to be implemented by subclass.")
+
+    @classmethod
+    def bin_path(cls):
+        """
+        Return the binary path to the commandline tool used by a specific
+        subclass. This is a class method so that the tool can be looked for
+        before making a particular MovieWriter subclass available.
+        """
+        return str(mpl.rcParams[cls._exec_key])
+
+    @classmethod
+    def isAvailable(cls):
+        """Return whether a MovieWriter subclass is actually available."""
+        return shutil.which(cls.bin_path()) is not None
+
+
+class FileMovieWriter(MovieWriter):
+    """
+    `MovieWriter` for writing to individual files and stitching at the end.
+
+    This must be sub-classed to be useful.
+    """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.frame_format = mpl.rcParams['animation.frame_format']
+
+    def setup(self, fig, outfile, dpi=None, frame_prefix=None):
+        """
+        Setup for writing the movie file.
+
+        Parameters
+        ----------
+        fig : `~matplotlib.figure.Figure`
+            The figure to grab the rendered frames from.
+        outfile : str
+            The filename of the resulting movie file.
+        dpi : float, default: ``fig.dpi``
+            The dpi of the output file. This, with the figure size,
+            controls the size in pixels of the resulting movie file.
+        frame_prefix : str, optional
+            The filename prefix to use for temporary files.  If *None* (the
+            default), files are written to a temporary directory which is
+            deleted by `finish`; if not *None*, no temporary files are
+            deleted.
+        """
+        # Check that path is valid
+        Path(outfile).parent.resolve(strict=True)
+        self.fig = fig
+        self.outfile = outfile
+        if dpi is None:
+            dpi = self.fig.dpi
+        self.dpi = dpi
+        self._adjust_frame_size()
+
+        if frame_prefix is None:
+            self._tmpdir = TemporaryDirectory()
+            self.temp_prefix = str(Path(self._tmpdir.name, 'tmp'))
+        else:
+            self._tmpdir = None
+            self.temp_prefix = frame_prefix
+        self._frame_counter = 0  # used for generating sequential file names
+        self._temp_paths = list()
+        self.fname_format_str = '%s%%07d.%s'
+
+    def __del__(self):
+        if hasattr(self, '_tmpdir') and self._tmpdir:
+            self._tmpdir.cleanup()
+
+    @property
+    def frame_format(self):
+        """
+        Format (png, jpeg, etc.) to use for saving the frames, which can be
+        decided by the individual subclasses.
+        """
+        return self._frame_format
+
+    @frame_format.setter
+    def frame_format(self, frame_format):
+        if frame_format in self.supported_formats:
+            self._frame_format = frame_format
+        else:
+            _api.warn_external(
+                f"Ignoring file format {frame_format!r} which is not "
+                f"supported by {type(self).__name__}; using "
+                f"{self.supported_formats[0]} instead.")
+            self._frame_format = self.supported_formats[0]
+
+    def _base_temp_name(self):
+        # Generates a template name (without number) given the frame format
+        # for extension and the prefix.
+        return self.fname_format_str % (self.temp_prefix, self.frame_format)
+
+    def grab_frame(self, **savefig_kwargs):
+        # docstring inherited
+        # Creates a filename for saving using basename and counter.
+        _validate_grabframe_kwargs(savefig_kwargs)
+        path = Path(self._base_temp_name() % self._frame_counter)
+        self._temp_paths.append(path)  # Record the filename for later use.
+        self._frame_counter += 1  # Ensures each created name is unique.
+        _log.debug('FileMovieWriter.grab_frame: Grabbing frame %d to path=%s',
+                   self._frame_counter, path)
+        with open(path, 'wb') as sink:  # Save figure to the sink.
+            self.fig.savefig(sink, format=self.frame_format, dpi=self.dpi,
+                             **savefig_kwargs)
+
+    def finish(self):
+        # Call run here now that all frame grabbing is done. All temp files
+        # are available to be assembled.
+        try:
+            self._run()
+            super().finish()
+        finally:
+            if self._tmpdir:
+                _log.debug(
+                    'MovieWriter: clearing temporary path=%s', self._tmpdir
+                )
+                self._tmpdir.cleanup()
+
+
+@writers.register('pillow')
+class PillowWriter(AbstractMovieWriter):
+    def _supports_transparency(self):
+        return True
+
+    @classmethod
+    def isAvailable(cls):
+        return True
+
+    def setup(self, fig, outfile, dpi=None):
+        super().setup(fig, outfile, dpi=dpi)
+        self._frames = []
+
+    def grab_frame(self, **savefig_kwargs):
+        _validate_grabframe_kwargs(savefig_kwargs)
+        buf = BytesIO()
+        self.fig.savefig(
+            buf, **{**savefig_kwargs, "format": "rgba", "dpi": self.dpi})
+        im = Image.frombuffer(
+            "RGBA", self.frame_size, buf.getbuffer(), "raw", "RGBA", 0, 1)
+        if im.getextrema()[3][0] < 255:
+            # This frame has transparency, so we'll just add it as is.
+            self._frame.append(im)
+        else:
+            # Without transparency, we switch to RGB mode, which converts to P mode a
+            # little better if needed (specifically, this helps with GIF output.)
+            self._frames.append(im.convert("RGB"))
+
+    def finish(self):
+        self._frames[0].save(
+            self.outfile, save_all=True, append_images=self._frames[1:],
+            duration=int(1000 / self.fps), loop=0)
+
+
+# Base class of ffmpeg information. Has the config keys and the common set
+# of arguments that controls the *output* side of things.
+class FFMpegBase:
+    """
+    Mixin class for FFMpeg output.
+
+    This is a base class for the concrete `FFMpegWriter` and `FFMpegFileWriter`
+    classes.
+    """
+
+    _exec_key = 'animation.ffmpeg_path'
+    _args_key = 'animation.ffmpeg_args'
+
+    def _supports_transparency(self):
+        suffix = Path(self.outfile).suffix
+        if suffix in {'.apng', '.avif', '.gif', '.webm', '.webp'}:
+            return True
+        # This list was found by going through `ffmpeg -codecs` for video encoders,
+        # running them with _support_transparency() forced to True, and checking that
+        # the "Pixel format" in Kdenlive included alpha. Note this is not a guarantee
+        # that transparency will work; you may also need to pass `-pix_fmt`, but we
+        # trust the user has done so if they are asking for these formats.
+        return self.codec in {
+            'apng', 'avrp', 'bmp', 'cfhd', 'dpx', 'ffv1', 'ffvhuff', 'gif', 'huffyuv',
+            'jpeg2000', 'ljpeg', 'png', 'prores', 'prores_aw', 'prores_ks', 'qtrle',
+            'rawvideo', 'targa', 'tiff', 'utvideo', 'v408', }
+
+    @property
+    def output_args(self):
+        args = []
+        suffix = Path(self.outfile).suffix
+        if suffix in {'.apng', '.avif', '.gif', '.webm', '.webp'}:
+            self.codec = suffix[1:]
+        else:
+            args.extend(['-vcodec', self.codec])
+        extra_args = (self.extra_args if self.extra_args is not None
+                      else mpl.rcParams[self._args_key])
+        # For h264, the default format is yuv444p, which is not compatible
+        # with quicktime (and others). Specifying yuv420p fixes playback on
+        # iOS, as well as HTML5 video in firefox and safari (on both Windows and
+        # macOS). Also fixes internet explorer. This is as of 2015/10/29.
+        if self.codec == 'h264' and '-pix_fmt' not in extra_args:
+            args.extend(['-pix_fmt', 'yuv420p'])
+        # For GIF, we're telling FFmpeg to split the video stream, to generate
+        # a palette, and then use it for encoding.
+        elif self.codec == 'gif' and '-filter_complex' not in extra_args:
+            args.extend(['-filter_complex',
+                         'split [a][b];[a] palettegen [p];[b][p] paletteuse'])
+        # For AVIF, we're telling FFmpeg to split the video stream, extract the alpha,
+        # in order to place it in a secondary stream, as needed by AVIF-in-FFmpeg.
+        elif self.codec == 'avif' and '-filter_complex' not in extra_args:
+            args.extend(['-filter_complex',
+                         'split [rgb][rgba]; [rgba] alphaextract [alpha]',
+                         '-map', '[rgb]', '-map', '[alpha]'])
+        if self.bitrate > 0:
+            args.extend(['-b', '%dk' % self.bitrate])  # %dk: bitrate in kbps.
+        for k, v in self.metadata.items():
+            args.extend(['-metadata', f'{k}={v}'])
+        args.extend(extra_args)
+
+        return args + ['-y', self.outfile]
+
+
+# Combine FFMpeg options with pipe-based writing
+@writers.register('ffmpeg')
+class FFMpegWriter(FFMpegBase, MovieWriter):
+    """
+    Pipe-based ffmpeg writer.
+
+    Frames are streamed directly to ffmpeg via a pipe and written in a single pass.
+
+    This effectively works as a slideshow input to ffmpeg with the fps passed as
+    ``-framerate``, so see also `their notes on frame rates`_ for further details.
+
+    .. _their notes on frame rates: https://trac.ffmpeg.org/wiki/Slideshow#Framerates
+    """
+    def _args(self):
+        # Returns the command line parameters for subprocess to use
+        # ffmpeg to create a movie using a pipe.
+        args = [self.bin_path(), '-f', 'rawvideo', '-vcodec', 'rawvideo',
+                '-s', '%dx%d' % self.frame_size, '-pix_fmt', self.frame_format,
+                '-framerate', str(self.fps)]
+        # Logging is quieted because subprocess.PIPE has limited buffer size.
+        # If you have a lot of frames in your animation and set logging to
+        # DEBUG, you will have a buffer overrun.
+        if _log.getEffectiveLevel() > logging.DEBUG:
+            args += ['-loglevel', 'error']
+        args += ['-i', 'pipe:'] + self.output_args
+        return args
+
+
+# Combine FFMpeg options with temp file-based writing
+@writers.register('ffmpeg_file')
+class FFMpegFileWriter(FFMpegBase, FileMovieWriter):
+    """
+    File-based ffmpeg writer.
+
+    Frames are written to temporary files on disk and then stitched together at the end.
+
+    This effectively works as a slideshow input to ffmpeg with the fps passed as
+    ``-framerate``, so see also `their notes on frame rates`_ for further details.
+
+    .. _their notes on frame rates: https://trac.ffmpeg.org/wiki/Slideshow#Framerates
+    """
+    supported_formats = ['png', 'jpeg', 'tiff', 'raw', 'rgba']
+
+    def _args(self):
+        # Returns the command line parameters for subprocess to use
+        # ffmpeg to create a movie using a collection of temp images
+        args = []
+        # For raw frames, we need to explicitly tell ffmpeg the metadata.
+        if self.frame_format in {'raw', 'rgba'}:
+            args += [
+                '-f', 'image2', '-vcodec', 'rawvideo',
+                '-video_size', '%dx%d' % self.frame_size,
+                '-pixel_format', 'rgba',
+            ]
+        args += ['-framerate', str(self.fps), '-i', self._base_temp_name()]
+        if not self._tmpdir:
+            args += ['-frames:v', str(self._frame_counter)]
+        # Logging is quieted because subprocess.PIPE has limited buffer size.
+        # If you have a lot of frames in your animation and set logging to
+        # DEBUG, you will have a buffer overrun.
+        if _log.getEffectiveLevel() > logging.DEBUG:
+            args += ['-loglevel', 'error']
+        return [self.bin_path(), *args, *self.output_args]
+
+
+# Base class for animated GIFs with ImageMagick
+class ImageMagickBase:
+    """
+    Mixin class for ImageMagick output.
+
+    This is a base class for the concrete `ImageMagickWriter` and
+    `ImageMagickFileWriter` classes, which define an ``input_names`` attribute
+    (or property) specifying the input names passed to ImageMagick.
+    """
+
+    _exec_key = 'animation.convert_path'
+    _args_key = 'animation.convert_args'
+
+    def _supports_transparency(self):
+        suffix = Path(self.outfile).suffix
+        return suffix in {'.apng', '.avif', '.gif', '.webm', '.webp'}
+
+    def _args(self):
+        # ImageMagick does not recognize "raw".
+        fmt = "rgba" if self.frame_format == "raw" else self.frame_format
+        extra_args = (self.extra_args if self.extra_args is not None
+                      else mpl.rcParams[self._args_key])
+        return [
+            self.bin_path(),
+            "-size", "%ix%i" % self.frame_size,
+            "-depth", "8",
+            "-delay", str(100 / self.fps),
+            "-loop", "0",
+            f"{fmt}:{self.input_names}",
+            *extra_args,
+            self.outfile,
+        ]
+
+    @classmethod
+    def bin_path(cls):
+        binpath = super().bin_path()
+        if binpath == 'convert':
+            binpath = mpl._get_executable_info('magick').executable
+        return binpath
+
+    @classmethod
+    def isAvailable(cls):
+        try:
+            return super().isAvailable()
+        except mpl.ExecutableNotFoundError as _enf:
+            # May be raised by get_executable_info.
+            _log.debug('ImageMagick unavailable due to: %s', _enf)
+            return False
+
+
+# Combine ImageMagick options with pipe-based writing
+@writers.register('imagemagick')
+class ImageMagickWriter(ImageMagickBase, MovieWriter):
+    """
+    Pipe-based animated gif writer.
+
+    Frames are streamed directly to ImageMagick via a pipe and written
+    in a single pass.
+    """
+
+    input_names = "-"  # stdin
+
+
+# Combine ImageMagick options with temp file-based writing
+@writers.register('imagemagick_file')
+class ImageMagickFileWriter(ImageMagickBase, FileMovieWriter):
+    """
+    File-based animated gif writer.
+
+    Frames are written to temporary files on disk and then stitched
+    together at the end.
+    """
+
+    supported_formats = ['png', 'jpeg', 'tiff', 'raw', 'rgba']
+    input_names = property(
+        lambda self: f'{self.temp_prefix}*.{self.frame_format}')
+
+
+# Taken directly from jakevdp's JSAnimation package at
+# http://github.com/jakevdp/JSAnimation
+def _included_frames(frame_count, frame_format, frame_dir):
+    return INCLUDED_FRAMES.format(Nframes=frame_count,
+                                  frame_dir=frame_dir,
+                                  frame_format=frame_format)
+
+
+def _embedded_frames(frame_list, frame_format):
+    """frame_list should be a list of base64-encoded png files"""
+    if frame_format == 'svg':
+        # Fix MIME type for svg
+        frame_format = 'svg+xml'
+    template = '  frames[{0}] = "data:image/{1};base64,{2}"\n'
+    return "\n" + "".join(
+        template.format(i, frame_format, frame_data.replace('\n', '\\\n'))
+        for i, frame_data in enumerate(frame_list))
+
+
+@writers.register('html')
+class HTMLWriter(FileMovieWriter):
+    """Writer for JavaScript-based HTML movies."""
+
+    supported_formats = ['png', 'jpeg', 'tiff', 'svg']
+
+    @classmethod
+    def isAvailable(cls):
+        return True
+
+    def __init__(self, fps=30, codec=None, bitrate=None, extra_args=None,
+                 metadata=None, embed_frames=False, default_mode='loop',
+                 embed_limit=None):
+
+        if extra_args:
+            _log.warning("HTMLWriter ignores 'extra_args'")
+        extra_args = ()  # Don't lookup nonexistent rcParam[args_key].
+        self.embed_frames = embed_frames
+        self.default_mode = default_mode.lower()
+        _api.check_in_list(['loop', 'once', 'reflect'],
+                           default_mode=self.default_mode)
+
+        # Save embed limit, which is given in MB
+        self._bytes_limit = mpl._val_or_rc(embed_limit, 'animation.embed_limit')
+        # Convert from MB to bytes
+        self._bytes_limit *= 1024 * 1024
+
+        super().__init__(fps, codec, bitrate, extra_args, metadata)
+
+    def setup(self, fig, outfile, dpi=None, frame_dir=None):
+        outfile = Path(outfile)
+        _api.check_in_list(['.html', '.htm'], outfile_extension=outfile.suffix)
+
+        self._saved_frames = []
+        self._total_bytes = 0
+        self._hit_limit = False
+
+        if not self.embed_frames:
+            if frame_dir is None:
+                frame_dir = outfile.with_name(outfile.stem + '_frames')
+            frame_dir.mkdir(parents=True, exist_ok=True)
+            frame_prefix = frame_dir / 'frame'
+        else:
+            frame_prefix = None
+
+        super().setup(fig, outfile, dpi, frame_prefix)
+        self._clear_temp = False
+
+    def grab_frame(self, **savefig_kwargs):
+        _validate_grabframe_kwargs(savefig_kwargs)
+        if self.embed_frames:
+            # Just stop processing if we hit the limit
+            if self._hit_limit:
+                return
+            f = BytesIO()
+            self.fig.savefig(f, format=self.frame_format,
+                             dpi=self.dpi, **savefig_kwargs)
+            imgdata64 = base64.encodebytes(f.getvalue()).decode('ascii')
+            self._total_bytes += len(imgdata64)
+            if self._total_bytes >= self._bytes_limit:
+                _log.warning(
+                    "Animation size has reached %s bytes, exceeding the limit "
+                    "of %s. If you're sure you want a larger animation "
+                    "embedded, set the animation.embed_limit rc parameter to "
+                    "a larger value (in MB). This and further frames will be "
+                    "dropped.", self._total_bytes, self._bytes_limit)
+                self._hit_limit = True
+            else:
+                self._saved_frames.append(imgdata64)
+        else:
+            return super().grab_frame(**savefig_kwargs)
+
+    def finish(self):
+        # save the frames to an html file
+        if self.embed_frames:
+            fill_frames = _embedded_frames(self._saved_frames,
+                                           self.frame_format)
+            frame_count = len(self._saved_frames)
+        else:
+            # temp names is filled by FileMovieWriter
+            frame_count = len(self._temp_paths)
+            fill_frames = _included_frames(
+                frame_count, self.frame_format,
+                self._temp_paths[0].parent.relative_to(self.outfile.parent))
+        mode_dict = dict(once_checked='',
+                         loop_checked='',
+                         reflect_checked='')
+        mode_dict[self.default_mode + '_checked'] = 'checked'
+
+        interval = 1000 // self.fps
+
+        with open(self.outfile, 'w') as of:
+            of.write(JS_INCLUDE + STYLE_INCLUDE)
+            of.write(DISPLAY_TEMPLATE.format(id=uuid.uuid4().hex,
+                                             Nframes=frame_count,
+                                             fill_frames=fill_frames,
+                                             interval=interval,
+                                             **mode_dict))
+
+        # Duplicate the temporary file clean up logic from
+        # FileMovieWriter.finish.  We cannot call the inherited version of
+        # finish because it assumes that there is a subprocess that we either
+        # need to call to merge many frames together or that there is a
+        # subprocess call that we need to clean up.
+        if self._tmpdir:
+            _log.debug('MovieWriter: clearing temporary path=%s', self._tmpdir)
+            self._tmpdir.cleanup()
+
+
+class Animation:
+    """
+    A base class for Animations.
+
+    This class is not usable as is, and should be subclassed to provide needed
+    behavior.
+
+    .. note::
+
+        You must store the created Animation in a variable that lives as long
+        as the animation should run. Otherwise, the Animation object will be
+        garbage-collected and the animation stops.
+
+    Parameters
+    ----------
+    fig : `~matplotlib.figure.Figure`
+        The figure object used to get needed events, such as draw or resize.
+
+    event_source : object, optional
+        A class that can run a callback when desired events
+        are generated, as well as be stopped and started.
+
+        Examples include timers (see `TimedAnimation`) and file
+        system notifications.
+
+    blit : bool, default: False
+        Whether blitting is used to optimize drawing.  If the backend does not
+        support blitting, then this parameter has no effect.
+
+    See Also
+    --------
+    FuncAnimation,  ArtistAnimation
+    """
+
+    def __init__(self, fig, event_source=None, blit=False):
+        self._draw_was_started = False
+
+        self._fig = fig
+        # Disables blitting for backends that don't support it.  This
+        # allows users to request it if available, but still have a
+        # fallback that works if it is not.
+        self._blit = blit and fig.canvas.supports_blit
+
+        # These are the basics of the animation.  The frame sequence represents
+        # information for each frame of the animation and depends on how the
+        # drawing is handled by the subclasses. The event source fires events
+        # that cause the frame sequence to be iterated.
+        self.frame_seq = self.new_frame_seq()
+        self.event_source = event_source
+
+        # Instead of starting the event source now, we connect to the figure's
+        # draw_event, so that we only start once the figure has been drawn.
+        self._first_draw_id = fig.canvas.mpl_connect('draw_event', self._start)
+
+        # Connect to the figure's close_event so that we don't continue to
+        # fire events and try to draw to a deleted figure.
+        self._close_id = self._fig.canvas.mpl_connect('close_event',
+                                                      self._stop)
+        if self._blit:
+            self._setup_blit()
+
+    def __del__(self):
+        if not getattr(self, '_draw_was_started', True):
+            warnings.warn(
+                'Animation was deleted without rendering anything. This is '
+                'most likely not intended. To prevent deletion, assign the '
+                'Animation to a variable, e.g. `anim`, that exists until you '
+                'output the Animation using `plt.show()` or '
+                '`anim.save()`.'
+            )
+
+    def _start(self, *args):
+        """
+        Starts interactive animation. Adds the draw frame command to the GUI
+        handler, calls show to start the event loop.
+        """
+        # Do not start the event source if saving() it.
+        if self._fig.canvas.is_saving():
+            return
+        # First disconnect our draw event handler
+        self._fig.canvas.mpl_disconnect(self._first_draw_id)
+
+        # Now do any initial draw
+        self._init_draw()
+
+        # Add our callback for stepping the animation and
+        # actually start the event_source.
+        self.event_source.add_callback(self._step)
+        self.event_source.start()
+
+    def _stop(self, *args):
+        # On stop we disconnect all of our events.
+        if self._blit:
+            self._fig.canvas.mpl_disconnect(self._resize_id)
+        self._fig.canvas.mpl_disconnect(self._close_id)
+        self.event_source.remove_callback(self._step)
+        self.event_source = None
+
+    def save(self, filename, writer=None, fps=None, dpi=None, codec=None,
+             bitrate=None, extra_args=None, metadata=None, extra_anim=None,
+             savefig_kwargs=None, *, progress_callback=None):
+        """
+        Save the animation as a movie file by drawing every frame.
+
+        Parameters
+        ----------
+        filename : str
+            The output filename, e.g., :file:`mymovie.mp4`.
+
+        writer : `MovieWriter` or str, default: :rc:`animation.writer`
+            A `MovieWriter` instance to use or a key that identifies a
+            class to use, such as 'ffmpeg'.
+
+        fps : int, optional
+            Movie frame rate (per second).  If not set, the frame rate from the
+            animation's frame interval.
+
+        dpi : float, default: :rc:`savefig.dpi`
+            Controls the dots per inch for the movie frames.  Together with
+            the figure's size in inches, this controls the size of the movie.
+
+        codec : str, default: :rc:`animation.codec`.
+            The video codec to use.  Not all codecs are supported by a given
+            `MovieWriter`.
+
+        bitrate : int, default: :rc:`animation.bitrate`
+            The bitrate of the movie, in kilobits per second.  Higher values
+            means higher quality movies, but increase the file size.  A value
+            of -1 lets the underlying movie encoder select the bitrate.
+
+        extra_args : list of str or None, optional
+            Extra command-line arguments passed to the underlying movie encoder. These
+            arguments are passed last to the encoder, just before the output filename.
+            The default, None, means to use :rc:`animation.[name-of-encoder]_args` for
+            the builtin writers.
+
+        metadata : dict[str, str], default: {}
+            Dictionary of keys and values for metadata to include in
+            the output file. Some keys that may be of use include:
+            title, artist, genre, subject, copyright, srcform, comment.
+
+        extra_anim : list, default: []
+            Additional `Animation` objects that should be included
+            in the saved movie file. These need to be from the same
+            `.Figure` instance. Also, animation frames will
+            just be simply combined, so there should be a 1:1 correspondence
+            between the frames from the different animations.
+
+        savefig_kwargs : dict, default: {}
+            Keyword arguments passed to each `~.Figure.savefig` call used to
+            save the individual frames.
+
+        progress_callback : function, optional
+            A callback function that will be called for every frame to notify
+            the saving progress. It must have the signature ::
+
+                def func(current_frame: int, total_frames: int) -> Any
+
+            where *current_frame* is the current frame number and *total_frames* is the
+            total number of frames to be saved. *total_frames* is set to None, if the
+            total number of frames cannot be determined. Return values may exist but are
+            ignored.
+
+            Example code to write the progress to stdout::
+
+                progress_callback = lambda i, n: print(f'Saving frame {i}/{n}')
+
+        Notes
+        -----
+        *fps*, *codec*, *bitrate*, *extra_args* and *metadata* are used to
+        construct a `.MovieWriter` instance and can only be passed if
+        *writer* is a string.  If they are passed as non-*None* and *writer*
+        is a `.MovieWriter`, a `RuntimeError` will be raised.
+        """
+
+        all_anim = [self]
+        if extra_anim is not None:
+            all_anim.extend(anim for anim in extra_anim
+                            if anim._fig is self._fig)
+
+        # Disable "Animation was deleted without rendering" warning.
+        for anim in all_anim:
+            anim._draw_was_started = True
+
+        if writer is None:
+            writer = mpl.rcParams['animation.writer']
+        elif (not isinstance(writer, str) and
+              any(arg is not None
+                  for arg in (fps, codec, bitrate, extra_args, metadata))):
+            raise RuntimeError('Passing in values for arguments '
+                               'fps, codec, bitrate, extra_args, or metadata '
+                               'is not supported when writer is an existing '
+                               'MovieWriter instance. These should instead be '
+                               'passed as arguments when creating the '
+                               'MovieWriter instance.')
+
+        if savefig_kwargs is None:
+            savefig_kwargs = {}
+        else:
+            # we are going to mutate this below
+            savefig_kwargs = dict(savefig_kwargs)
+
+        if fps is None and hasattr(self, '_interval'):
+            # Convert interval in ms to frames per second
+            fps = 1000. / self._interval
+
+        # Reuse the savefig DPI for ours if none is given.
+        dpi = mpl._val_or_rc(dpi, 'savefig.dpi')
+        if dpi == 'figure':
+            dpi = self._fig.dpi
+
+        writer_kwargs = {}
+        if codec is not None:
+            writer_kwargs['codec'] = codec
+        if bitrate is not None:
+            writer_kwargs['bitrate'] = bitrate
+        if extra_args is not None:
+            writer_kwargs['extra_args'] = extra_args
+        if metadata is not None:
+            writer_kwargs['metadata'] = metadata
+
+        # If we have the name of a writer, instantiate an instance of the
+        # registered class.
+        if isinstance(writer, str):
+            try:
+                writer_cls = writers[writer]
+            except RuntimeError:  # Raised if not available.
+                writer_cls = PillowWriter  # Always available.
+                _log.warning("MovieWriter %s unavailable; using Pillow "
+                             "instead.", writer)
+            writer = writer_cls(fps, **writer_kwargs)
+        _log.info('Animation.save using %s', type(writer))
+
+        if 'bbox_inches' in savefig_kwargs:
+            _log.warning("Warning: discarding the 'bbox_inches' argument in "
+                         "'savefig_kwargs' as it may cause frame size "
+                         "to vary, which is inappropriate for animation.")
+            savefig_kwargs.pop('bbox_inches')
+
+        # Create a new sequence of frames for saved data. This is different
+        # from new_frame_seq() to give the ability to save 'live' generated
+        # frame information to be saved later.
+        # TODO: Right now, after closing the figure, saving a movie won't work
+        # since GUI widgets are gone. Either need to remove extra code to
+        # allow for this non-existent use case or find a way to make it work.
+
+        def _pre_composite_to_white(color):
+            r, g, b, a = mcolors.to_rgba(color)
+            return a * np.array([r, g, b]) + 1 - a
+
+        # canvas._is_saving = True makes the draw_event animation-starting
+        # callback a no-op; canvas.manager = None prevents resizing the GUI
+        # widget (both are likewise done in savefig()).
+        with (writer.saving(self._fig, filename, dpi),
+              cbook._setattr_cm(self._fig.canvas, _is_saving=True, manager=None)):
+            if not writer._supports_transparency():
+                facecolor = savefig_kwargs.get('facecolor',
+                                               mpl.rcParams['savefig.facecolor'])
+                if facecolor == 'auto':
+                    facecolor = self._fig.get_facecolor()
+                savefig_kwargs['facecolor'] = _pre_composite_to_white(facecolor)
+                savefig_kwargs['transparent'] = False   # just to be safe!
+
+            for anim in all_anim:
+                anim._init_draw()  # Clear the initial frame
+            frame_number = 0
+            # TODO: Currently only FuncAnimation has a save_count
+            #       attribute. Can we generalize this to all Animations?
+            save_count_list = [getattr(a, '_save_count', None)
+                               for a in all_anim]
+            if None in save_count_list:
+                total_frames = None
+            else:
+                total_frames = sum(save_count_list)
+            for data in zip(*[a.new_saved_frame_seq() for a in all_anim]):
+                for anim, d in zip(all_anim, data):
+                    # TODO: See if turning off blit is really necessary
+                    anim._draw_next_frame(d, blit=False)
+                    if progress_callback is not None:
+                        progress_callback(frame_number, total_frames)
+                        frame_number += 1
+                writer.grab_frame(**savefig_kwargs)
+
+    def _step(self, *args):
+        """
+        Handler for getting events. By default, gets the next frame in the
+        sequence and hands the data off to be drawn.
+        """
+        # Returns True to indicate that the event source should continue to
+        # call _step, until the frame sequence reaches the end of iteration,
+        # at which point False will be returned.
+        try:
+            framedata = next(self.frame_seq)
+            self._draw_next_frame(framedata, self._blit)
+            return True
+        except StopIteration:
+            return False
+
+    def new_frame_seq(self):
+        """Return a new sequence of frame information."""
+        # Default implementation is just an iterator over self._framedata
+        return iter(self._framedata)
+
+    def new_saved_frame_seq(self):
+        """Return a new sequence of saved/cached frame information."""
+        # Default is the same as the regular frame sequence
+        return self.new_frame_seq()
+
+    def _draw_next_frame(self, framedata, blit):
+        # Breaks down the drawing of the next frame into steps of pre- and
+        # post- draw, as well as the drawing of the frame itself.
+        self._pre_draw(framedata, blit)
+        self._draw_frame(framedata)
+        self._post_draw(framedata, blit)
+
+    def _init_draw(self):
+        # Initial draw to clear the frame. Also used by the blitting code
+        # when a clean base is required.
+        self._draw_was_started = True
+
+    def _pre_draw(self, framedata, blit):
+        # Perform any cleaning or whatnot before the drawing of the frame.
+        # This default implementation allows blit to clear the frame.
+        if blit:
+            self._blit_clear(self._drawn_artists)
+
+    def _draw_frame(self, framedata):
+        # Performs actual drawing of the frame.
+        raise NotImplementedError('Needs to be implemented by subclasses to'
+                                  ' actually make an animation.')
+
+    def _post_draw(self, framedata, blit):
+        # After the frame is rendered, this handles the actual flushing of
+        # the draw, which can be a direct draw_idle() or make use of the
+        # blitting.
+        if blit and self._drawn_artists:
+            self._blit_draw(self._drawn_artists)
+        else:
+            self._fig.canvas.draw_idle()
+
+    # The rest of the code in this class is to facilitate easy blitting
+    def _blit_draw(self, artists):
+        # Handles blitted drawing, which renders only the artists given instead
+        # of the entire figure.
+        updated_ax = {a.axes for a in artists}
+        # Enumerate artists to cache Axes backgrounds. We do not draw
+        # artists yet to not cache foreground from plots with shared Axes
+        for ax in updated_ax:
+            # If we haven't cached the background for the current view of this
+            # Axes object, do so now. This might not always be reliable, but
+            # it's an attempt to automate the process.
+            cur_view = ax._get_view()
+            view, bg = self._blit_cache.get(ax, (object(), None))
+            if cur_view != view:
+                self._blit_cache[ax] = (
+                    cur_view, ax.figure.canvas.copy_from_bbox(ax.bbox))
+        # Make a separate pass to draw foreground.
+        for a in artists:
+            a.axes.draw_artist(a)
+        # After rendering all the needed artists, blit each Axes individually.
+        for ax in updated_ax:
+            ax.figure.canvas.blit(ax.bbox)
+
+    def _blit_clear(self, artists):
+        # Get a list of the Axes that need clearing from the artists that
+        # have been drawn. Grab the appropriate saved background from the
+        # cache and restore.
+        axes = {a.axes for a in artists}
+        for ax in axes:
+            try:
+                view, bg = self._blit_cache[ax]
+            except KeyError:
+                continue
+            if ax._get_view() == view:
+                ax.figure.canvas.restore_region(bg)
+            else:
+                self._blit_cache.pop(ax)
+
+    def _setup_blit(self):
+        # Setting up the blit requires: a cache of the background for the Axes
+        self._blit_cache = dict()
+        self._drawn_artists = []
+        # _post_draw needs to be called first to initialize the renderer
+        self._post_draw(None, self._blit)
+        # Then we need to clear the Frame for the initial draw
+        # This is typically handled in _on_resize because QT and Tk
+        # emit a resize event on launch, but the macosx backend does not,
+        # thus we force it here for everyone for consistency
+        self._init_draw()
+        # Connect to future resize events
+        self._resize_id = self._fig.canvas.mpl_connect('resize_event',
+                                                       self._on_resize)
+
+    def _on_resize(self, event):
+        # On resize, we need to disable the resize event handling so we don't
+        # get too many events. Also stop the animation events, so that
+        # we're paused. Reset the cache and re-init. Set up an event handler
+        # to catch once the draw has actually taken place.
+        self._fig.canvas.mpl_disconnect(self._resize_id)
+        self.event_source.stop()
+        self._blit_cache.clear()
+        self._init_draw()
+        self._resize_id = self._fig.canvas.mpl_connect('draw_event',
+                                                       self._end_redraw)
+
+    def _end_redraw(self, event):
+        # Now that the redraw has happened, do the post draw flushing and
+        # blit handling. Then re-enable all of the original events.
+        self._post_draw(None, False)
+        self.event_source.start()
+        self._fig.canvas.mpl_disconnect(self._resize_id)
+        self._resize_id = self._fig.canvas.mpl_connect('resize_event',
+                                                       self._on_resize)
+
+    def to_html5_video(self, embed_limit=None):
+        """
+        Convert the animation to an HTML5 ``<video>`` tag.
+
+        This saves the animation as an h264 video, encoded in base64
+        directly into the HTML5 video tag. This respects :rc:`animation.writer`
+        and :rc:`animation.bitrate`. This also makes use of the
+        *interval* to control the speed, and uses the *repeat*
+        parameter to decide whether to loop.
+
+        Parameters
+        ----------
+        embed_limit : float, optional
+            Limit, in MB, of the returned animation. No animation is created
+            if the limit is exceeded.
+            Defaults to :rc:`animation.embed_limit` = 20.0.
+
+        Returns
+        -------
+        str
+            An HTML5 video tag with the animation embedded as base64 encoded
+            h264 video.
+            If the *embed_limit* is exceeded, this returns the string
+            "Video too large to embed."
+        """
+        VIDEO_TAG = r'''<video {size} {options}>
+  <source type="video/mp4" src="data:video/mp4;base64,{video}">
+  Your browser does not support the video tag.
+</video>'''
+        # Cache the rendering of the video as HTML
+        if not hasattr(self, '_base64_video'):
+            # Save embed limit, which is given in MB
+            embed_limit = mpl._val_or_rc(embed_limit, 'animation.embed_limit')
+
+            # Convert from MB to bytes
+            embed_limit *= 1024 * 1024
+
+            # Can't open a NamedTemporaryFile twice on Windows, so use a
+            # TemporaryDirectory instead.
+            with TemporaryDirectory() as tmpdir:
+                path = Path(tmpdir, "temp.m4v")
+                # We create a writer manually so that we can get the
+                # appropriate size for the tag
+                Writer = writers[mpl.rcParams['animation.writer']]
+                writer = Writer(codec='h264',
+                                bitrate=mpl.rcParams['animation.bitrate'],
+                                fps=1000. / self._interval)
+                self.save(str(path), writer=writer)
+                # Now open and base64 encode.
+                vid64 = base64.encodebytes(path.read_bytes())
+
+            vid_len = len(vid64)
+            if vid_len >= embed_limit:
+                _log.warning(
+                    "Animation movie is %s bytes, exceeding the limit of %s. "
+                    "If you're sure you want a large animation embedded, set "
+                    "the animation.embed_limit rc parameter to a larger value "
+                    "(in MB).", vid_len, embed_limit)
+            else:
+                self._base64_video = vid64.decode('ascii')
+                self._video_size = 'width="{}" height="{}"'.format(
+                        *writer.frame_size)
+
+        # If we exceeded the size, this attribute won't exist
+        if hasattr(self, '_base64_video'):
+            # Default HTML5 options are to autoplay and display video controls
+            options = ['controls', 'autoplay']
+
+            # If we're set to repeat, make it loop
+            if getattr(self, '_repeat', False):
+                options.append('loop')
+
+            return VIDEO_TAG.format(video=self._base64_video,
+                                    size=self._video_size,
+                                    options=' '.join(options))
+        else:
+            return 'Video too large to embed.'
+
+    def to_jshtml(self, fps=None, embed_frames=True, default_mode=None):
+        """
+        Generate HTML representation of the animation.
+
+        Parameters
+        ----------
+        fps : int, optional
+            Movie frame rate (per second). If not set, the frame rate from
+            the animation's frame interval.
+        embed_frames : bool, optional
+        default_mode : str, optional
+            What to do when the animation ends. Must be one of ``{'loop',
+            'once', 'reflect'}``. Defaults to ``'loop'`` if the *repeat*
+            parameter is True, otherwise ``'once'``.
+
+        Returns
+        -------
+        str
+            An HTML representation of the animation embedded as a js object as
+            produced with the `.HTMLWriter`.
+        """
+        if fps is None and hasattr(self, '_interval'):
+            # Convert interval in ms to frames per second
+            fps = 1000 / self._interval
+
+        # If we're not given a default mode, choose one base on the value of
+        # the _repeat attribute
+        if default_mode is None:
+            default_mode = 'loop' if getattr(self, '_repeat',
+                                             False) else 'once'
+
+        if not hasattr(self, "_html_representation"):
+            # Can't open a NamedTemporaryFile twice on Windows, so use a
+            # TemporaryDirectory instead.
+            with TemporaryDirectory() as tmpdir:
+                path = Path(tmpdir, "temp.html")
+                writer = HTMLWriter(fps=fps,
+                                    embed_frames=embed_frames,
+                                    default_mode=default_mode)
+                self.save(str(path), writer=writer)
+                self._html_representation = path.read_text()
+
+        return self._html_representation
+
+    def _repr_html_(self):
+        """IPython display hook for rendering."""
+        fmt = mpl.rcParams['animation.html']
+        if fmt == 'html5':
+            return self.to_html5_video()
+        elif fmt == 'jshtml':
+            return self.to_jshtml()
+
+    def pause(self):
+        """Pause the animation."""
+        self.event_source.stop()
+        if self._blit:
+            for artist in self._drawn_artists:
+                artist.set_animated(False)
+
+    def resume(self):
+        """Resume the animation."""
+        self.event_source.start()
+        if self._blit:
+            for artist in self._drawn_artists:
+                artist.set_animated(True)
+
+
+class TimedAnimation(Animation):
+    """
+    `Animation` subclass for time-based animation.
+
+    A new frame is drawn every *interval* milliseconds.
+
+    .. note::
+
+        You must store the created Animation in a variable that lives as long
+        as the animation should run. Otherwise, the Animation object will be
+        garbage-collected and the animation stops.
+
+    Parameters
+    ----------
+    fig : `~matplotlib.figure.Figure`
+        The figure object used to get needed events, such as draw or resize.
+    interval : int, default: 200
+        Delay between frames in milliseconds.
+    repeat_delay : int, default: 0
+        The delay in milliseconds between consecutive animation runs, if
+        *repeat* is True.
+    repeat : bool, default: True
+        Whether the animation repeats when the sequence of frames is completed.
+    blit : bool, default: False
+        Whether blitting is used to optimize drawing.
+    """
+    def __init__(self, fig, interval=200, repeat_delay=0, repeat=True,
+                 event_source=None, *args, **kwargs):
+        self._interval = interval
+        # Undocumented support for repeat_delay = None as backcompat.
+        self._repeat_delay = repeat_delay if repeat_delay is not None else 0
+        self._repeat = repeat
+        # If we're not given an event source, create a new timer. This permits
+        # sharing timers between animation objects for syncing animations.
+        if event_source is None:
+            event_source = fig.canvas.new_timer(interval=self._interval)
+        super().__init__(fig, event_source=event_source, *args, **kwargs)
+
+    def _step(self, *args):
+        """Handler for getting events."""
+        # Extends the _step() method for the Animation class.  If
+        # Animation._step signals that it reached the end and we want to
+        # repeat, we refresh the frame sequence and return True. If
+        # _repeat_delay is set, change the event_source's interval to our loop
+        # delay and set the callback to one which will then set the interval
+        # back.
+        still_going = super()._step(*args)
+        if not still_going:
+            if self._repeat:
+                # Restart the draw loop
+                self._init_draw()
+                self.frame_seq = self.new_frame_seq()
+                self.event_source.interval = self._repeat_delay
+                return True
+            else:
+                # We are done with the animation. Call pause to remove
+                # animated flags from artists that were using blitting
+                self.pause()
+                if self._blit:
+                    # Remove the resize callback if we were blitting
+                    self._fig.canvas.mpl_disconnect(self._resize_id)
+                self._fig.canvas.mpl_disconnect(self._close_id)
+                self.event_source = None
+                return False
+
+        self.event_source.interval = self._interval
+        return True
+
+
+class ArtistAnimation(TimedAnimation):
+    """
+    `TimedAnimation` subclass that creates an animation by using a fixed
+    set of `.Artist` objects.
+
+    Before creating an instance, all plotting should have taken place
+    and the relevant artists saved.
+
+    .. note::
+
+        You must store the created Animation in a variable that lives as long
+        as the animation should run. Otherwise, the Animation object will be
+        garbage-collected and the animation stops.
+
+    Parameters
+    ----------
+    fig : `~matplotlib.figure.Figure`
+        The figure object used to get needed events, such as draw or resize.
+    artists : list
+        Each list entry is a collection of `.Artist` objects that are made
+        visible on the corresponding frame.  Other artists are made invisible.
+    interval : int, default: 200
+        Delay between frames in milliseconds.
+    repeat_delay : int, default: 0
+        The delay in milliseconds between consecutive animation runs, if
+        *repeat* is True.
+    repeat : bool, default: True
+        Whether the animation repeats when the sequence of frames is completed.
+    blit : bool, default: False
+        Whether blitting is used to optimize drawing.
+    """
+
+    def __init__(self, fig, artists, *args, **kwargs):
+        # Internal list of artists drawn in the most recent frame.
+        self._drawn_artists = []
+
+        # Use the list of artists as the framedata, which will be iterated
+        # over by the machinery.
+        self._framedata = artists
+        super().__init__(fig, *args, **kwargs)
+
+    def _init_draw(self):
+        super()._init_draw()
+        # Make all the artists involved in *any* frame invisible
+        figs = set()
+        for f in self.new_frame_seq():
+            for artist in f:
+                artist.set_visible(False)
+                artist.set_animated(self._blit)
+                # Assemble a list of unique figures that need flushing
+                if artist.get_figure() not in figs:
+                    figs.add(artist.get_figure())
+
+        # Flush the needed figures
+        for fig in figs:
+            fig.canvas.draw_idle()
+
+    def _pre_draw(self, framedata, blit):
+        """Clears artists from the last frame."""
+        if blit:
+            # Let blit handle clearing
+            self._blit_clear(self._drawn_artists)
+        else:
+            # Otherwise, make all the artists from the previous frame invisible
+            for artist in self._drawn_artists:
+                artist.set_visible(False)
+
+    def _draw_frame(self, artists):
+        # Save the artists that were passed in as framedata for the other
+        # steps (esp. blitting) to use.
+        self._drawn_artists = artists
+
+        # Make all the artists from the current frame visible
+        for artist in artists:
+            artist.set_visible(True)
+
+
+class FuncAnimation(TimedAnimation):
+    """
+    `TimedAnimation` subclass that makes an animation by repeatedly calling
+    a function *func*.
+
+    .. note::
+
+        You must store the created Animation in a variable that lives as long
+        as the animation should run. Otherwise, the Animation object will be
+        garbage-collected and the animation stops.
+
+    Parameters
+    ----------
+    fig : `~matplotlib.figure.Figure`
+        The figure object used to get needed events, such as draw or resize.
+
+    func : callable
+        The function to call at each frame.  The first argument will
+        be the next value in *frames*.   Any additional positional
+        arguments can be supplied using `functools.partial` or via the *fargs*
+        parameter.
+
+        The required signature is::
+
+            def func(frame, *fargs) -> iterable_of_artists
+
+        It is often more convenient to provide the arguments using
+        `functools.partial`. In this way it is also possible to pass keyword
+        arguments. To pass a function with both positional and keyword
+        arguments, set all arguments as keyword arguments, just leaving the
+        *frame* argument unset::
+
+            def func(frame, art, *, y=None):
+                ...
+
+            ani = FuncAnimation(fig, partial(func, art=ln, y='foo'))
+
+        If ``blit == True``, *func* must return an iterable of all artists
+        that were modified or created. This information is used by the blitting
+        algorithm to determine which parts of the figure have to be updated.
+        The return value is unused if ``blit == False`` and may be omitted in
+        that case.
+
+    frames : iterable, int, generator function, or None, optional
+        Source of data to pass *func* and each frame of the animation
+
+        - If an iterable, then simply use the values provided.  If the
+          iterable has a length, it will override the *save_count* kwarg.
+
+        - If an integer, then equivalent to passing ``range(frames)``
+
+        - If a generator function, then must have the signature::
+
+             def gen_function() -> obj
+
+        - If *None*, then equivalent to passing ``itertools.count``.
+
+        In all of these cases, the values in *frames* is simply passed through
+        to the user-supplied *func* and thus can be of any type.
+
+    init_func : callable, optional
+        A function used to draw a clear frame. If not given, the results of
+        drawing from the first item in the frames sequence will be used. This
+        function will be called once before the first frame.
+
+        The required signature is::
+
+            def init_func() -> iterable_of_artists
+
+        If ``blit == True``, *init_func* must return an iterable of artists
+        to be re-drawn. This information is used by the blitting algorithm to
+        determine which parts of the figure have to be updated.  The return
+        value is unused if ``blit == False`` and may be omitted in that case.
+
+    fargs : tuple or None, optional
+        Additional arguments to pass to each call to *func*. Note: the use of
+        `functools.partial` is preferred over *fargs*. See *func* for details.
+
+    save_count : int, optional
+        Fallback for the number of values from *frames* to cache. This is
+        only used if the number of frames cannot be inferred from *frames*,
+        i.e. when it's an iterator without length or a generator.
+
+    interval : int, default: 200
+        Delay between frames in milliseconds.
+
+    repeat_delay : int, default: 0
+        The delay in milliseconds between consecutive animation runs, if
+        *repeat* is True.
+
+    repeat : bool, default: True
+        Whether the animation repeats when the sequence of frames is completed.
+
+    blit : bool, default: False
+        Whether blitting is used to optimize drawing.  Note: when using
+        blitting, any animated artists will be drawn according to their zorder;
+        however, they will be drawn on top of any previous artists, regardless
+        of their zorder.
+
+    cache_frame_data : bool, default: True
+        Whether frame data is cached.  Disabling cache might be helpful when
+        frames contain large objects.
+    """
+    def __init__(self, fig, func, frames=None, init_func=None, fargs=None,
+                 save_count=None, *, cache_frame_data=True, **kwargs):
+        if fargs:
+            self._args = fargs
+        else:
+            self._args = ()
+        self._func = func
+        self._init_func = init_func
+
+        # Amount of framedata to keep around for saving movies. This is only
+        # used if we don't know how many frames there will be: in the case
+        # of no generator or in the case of a callable.
+        self._save_count = save_count
+        # Set up a function that creates a new iterable when needed. If nothing
+        # is passed in for frames, just use itertools.count, which will just
+        # keep counting from 0. A callable passed in for frames is assumed to
+        # be a generator. An iterable will be used as is, and anything else
+        # will be treated as a number of frames.
+        if frames is None:
+            self._iter_gen = itertools.count
+        elif callable(frames):
+            self._iter_gen = frames
+        elif np.iterable(frames):
+            if kwargs.get('repeat', True):
+                self._tee_from = frames
+                def iter_frames(frames=frames):
+                    this, self._tee_from = itertools.tee(self._tee_from, 2)
+                    yield from this
+                self._iter_gen = iter_frames
+            else:
+                self._iter_gen = lambda: iter(frames)
+            if hasattr(frames, '__len__'):
+                self._save_count = len(frames)
+                if save_count is not None:
+                    _api.warn_external(
+                        f"You passed in an explicit {save_count=} "
+                        "which is being ignored in favor of "
+                        f"{len(frames)=}."
+                    )
+        else:
+            self._iter_gen = lambda: iter(range(frames))
+            self._save_count = frames
+            if save_count is not None:
+                _api.warn_external(
+                    f"You passed in an explicit {save_count=} which is being "
+                    f"ignored in favor of {frames=}."
+                )
+        if self._save_count is None and cache_frame_data:
+            _api.warn_external(
+                f"{frames=!r} which we can infer the length of, "
+                "did not pass an explicit *save_count* "
+                f"and passed {cache_frame_data=}.  To avoid a possibly "
+                "unbounded cache, frame data caching has been disabled. "
+                "To suppress this warning either pass "
+                "`cache_frame_data=False` or `save_count=MAX_FRAMES`."
+            )
+            cache_frame_data = False
+
+        self._cache_frame_data = cache_frame_data
+
+        # Needs to be initialized so the draw functions work without checking
+        self._save_seq = []
+
+        super().__init__(fig, **kwargs)
+
+        # Need to reset the saved seq, since right now it will contain data
+        # for a single frame from init, which is not what we want.
+        self._save_seq = []
+
+    def new_frame_seq(self):
+        # Use the generating function to generate a new frame sequence
+        return self._iter_gen()
+
+    def new_saved_frame_seq(self):
+        # Generate an iterator for the sequence of saved data. If there are
+        # no saved frames, generate a new frame sequence and take the first
+        # save_count entries in it.
+        if self._save_seq:
+            # While iterating we are going to update _save_seq
+            # so make a copy to safely iterate over
+            self._old_saved_seq = list(self._save_seq)
+            return iter(self._old_saved_seq)
+        else:
+            if self._save_count is None:
+                frame_seq = self.new_frame_seq()
+
+                def gen():
+                    try:
+                        while True:
+                            yield next(frame_seq)
+                    except StopIteration:
+                        pass
+                return gen()
+            else:
+                return itertools.islice(self.new_frame_seq(), self._save_count)
+
+    def _init_draw(self):
+        super()._init_draw()
+        # Initialize the drawing either using the given init_func or by
+        # calling the draw function with the first item of the frame sequence.
+        # For blitting, the init_func should return a sequence of modified
+        # artists.
+        if self._init_func is None:
+            try:
+                frame_data = next(self.new_frame_seq())
+            except StopIteration:
+                # we can't start the iteration, it may have already been
+                # exhausted by a previous save or just be 0 length.
+                # warn and bail.
+                warnings.warn(
+                    "Can not start iterating the frames for the initial draw. "
+                    "This can be caused by passing in a 0 length sequence "
+                    "for *frames*.\n\n"
+                    "If you passed *frames* as a generator "
+                    "it may be exhausted due to a previous display or save."
+                )
+                return
+            self._draw_frame(frame_data)
+        else:
+            self._drawn_artists = self._init_func()
+            if self._blit:
+                if self._drawn_artists is None:
+                    raise RuntimeError('The init_func must return a '
+                                       'sequence of Artist objects.')
+                for a in self._drawn_artists:
+                    a.set_animated(self._blit)
+        self._save_seq = []
+
+    def _draw_frame(self, framedata):
+        if self._cache_frame_data:
+            # Save the data for potential saving of movies.
+            self._save_seq.append(framedata)
+            self._save_seq = self._save_seq[-self._save_count:]
+
+        # Call the func with framedata and args. If blitting is desired,
+        # func needs to return a sequence of any artists that were modified.
+        self._drawn_artists = self._func(framedata, *self._args)
+
+        if self._blit:
+
+            err = RuntimeError('The animation function must return a sequence '
+                               'of Artist objects.')
+            try:
+                # check if a sequence
+                iter(self._drawn_artists)
+            except TypeError:
+                raise err from None
+
+            # check each item if it's artist
+            for i in self._drawn_artists:
+                if not isinstance(i, mpl.artist.Artist):
+                    raise err
+
+            self._drawn_artists = sorted(self._drawn_artists,
+                                         key=lambda x: x.get_zorder())
+
+            for a in self._drawn_artists:
+                a.set_animated(self._blit)
+
+
+def _validate_grabframe_kwargs(savefig_kwargs):
+    if mpl.rcParams['savefig.bbox'] == 'tight':
+        raise ValueError(
+            f"{mpl.rcParams['savefig.bbox']=} must not be 'tight' as it "
+            "may cause frame size to vary, which is inappropriate for animation."
+        )
+    for k in ('dpi', 'bbox_inches', 'format'):
+        if k in savefig_kwargs:
+            raise TypeError(
+                f"grab_frame got an unexpected keyword argument {k!r}"
+            )

moondream/lib/python3.10/site-packages/matplotlib/animation.pyi

@@ -0,0 +1,217 @@
+import abc
+from collections.abc import Callable, Collection, Iterable, Sequence, Generator
+import contextlib
+from pathlib import Path
+from matplotlib.artist import Artist
+from matplotlib.backend_bases import TimerBase
+from matplotlib.figure import Figure
+
+from typing import Any
+
+subprocess_creation_flags: int
+
+def adjusted_figsize(w: float, h: float, dpi: float, n: int) -> tuple[float, float]: ...
+
+class MovieWriterRegistry:
+    def __init__(self) -> None: ...
+    def register(
+        self, name: str
+    ) -> Callable[[type[AbstractMovieWriter]], type[AbstractMovieWriter]]: ...
+    def is_available(self, name: str) -> bool: ...
+    def __iter__(self) -> Generator[str, None, None]: ...
+    def list(self) -> list[str]: ...
+    def __getitem__(self, name: str) -> type[AbstractMovieWriter]: ...
+
+writers: MovieWriterRegistry
+
+class AbstractMovieWriter(abc.ABC, metaclass=abc.ABCMeta):
+    fps: int
+    metadata: dict[str, str]
+    codec: str
+    bitrate: int
+    def __init__(
+        self,
+        fps: int = ...,
+        metadata: dict[str, str] | None = ...,
+        codec: str | None = ...,
+        bitrate: int | None = ...,
+    ) -> None: ...
+    outfile: str | Path
+    fig: Figure
+    dpi: float
+
+    @abc.abstractmethod
+    def setup(self, fig: Figure, outfile: str | Path, dpi: float | None = ...) -> None: ...
+    @property
+    def frame_size(self) -> tuple[int, int]: ...
+    @abc.abstractmethod
+    def grab_frame(self, **savefig_kwargs) -> None: ...
+    @abc.abstractmethod
+    def finish(self) -> None: ...
+    @contextlib.contextmanager
+    def saving(
+        self, fig: Figure, outfile: str | Path, dpi: float | None, *args, **kwargs
+    ) -> Generator[AbstractMovieWriter, None, None]: ...
+
+class MovieWriter(AbstractMovieWriter):
+    supported_formats: list[str]
+    frame_format: str
+    extra_args: list[str] | None
+    def __init__(
+        self,
+        fps: int = ...,
+        codec: str | None = ...,
+        bitrate: int | None = ...,
+        extra_args: list[str] | None = ...,
+        metadata: dict[str, str] | None = ...,
+    ) -> None: ...
+    def setup(self, fig: Figure, outfile: str | Path, dpi: float | None = ...) -> None: ...
+    def grab_frame(self, **savefig_kwargs) -> None: ...
+    def finish(self) -> None: ...
+    @classmethod
+    def bin_path(cls) -> str: ...
+    @classmethod
+    def isAvailable(cls) -> bool: ...
+
+class FileMovieWriter(MovieWriter):
+    fig: Figure
+    outfile: str | Path
+    dpi: float
+    temp_prefix: str
+    fname_format_str: str
+    def setup(
+        self,
+        fig: Figure,
+        outfile: str | Path,
+        dpi: float | None = ...,
+        frame_prefix: str | Path | None = ...,
+    ) -> None: ...
+    def __del__(self) -> None: ...
+    @property
+    def frame_format(self) -> str: ...
+    @frame_format.setter
+    def frame_format(self, frame_format: str) -> None: ...
+
+class PillowWriter(AbstractMovieWriter):
+    @classmethod
+    def isAvailable(cls) -> bool: ...
+    def setup(
+        self, fig: Figure, outfile: str | Path, dpi: float | None = ...
+    ) -> None: ...
+    def grab_frame(self, **savefig_kwargs) -> None: ...
+    def finish(self) -> None: ...
+
+class FFMpegBase:
+    codec: str
+    @property
+    def output_args(self) -> list[str]: ...
+
+class FFMpegWriter(FFMpegBase, MovieWriter): ...
+
+class FFMpegFileWriter(FFMpegBase, FileMovieWriter):
+    supported_formats: list[str]
+
+class ImageMagickBase:
+    @classmethod
+    def bin_path(cls) -> str: ...
+    @classmethod
+    def isAvailable(cls) -> bool: ...
+
+class ImageMagickWriter(ImageMagickBase, MovieWriter):
+    input_names: str
+
+class ImageMagickFileWriter(ImageMagickBase, FileMovieWriter):
+    supported_formats: list[str]
+    @property
+    def input_names(self) -> str: ...
+
+class HTMLWriter(FileMovieWriter):
+    supported_formats: list[str]
+    @classmethod
+    def isAvailable(cls) -> bool: ...
+    embed_frames: bool
+    default_mode: str
+    def __init__(
+        self,
+        fps: int = ...,
+        codec: str | None = ...,
+        bitrate: int | None = ...,
+        extra_args: list[str] | None = ...,
+        metadata: dict[str, str] | None = ...,
+        embed_frames: bool = ...,
+        default_mode: str = ...,
+        embed_limit: float | None = ...,
+    ) -> None: ...
+    def setup(
+        self,
+        fig: Figure,
+        outfile: str | Path,
+        dpi: float | None = ...,
+        frame_dir: str | Path | None = ...,
+    ) -> None: ...
+    def grab_frame(self, **savefig_kwargs): ...
+    def finish(self) -> None: ...
+
+class Animation:
+    frame_seq: Iterable[Artist]
+    event_source: Any
+    def __init__(
+        self, fig: Figure, event_source: Any | None = ..., blit: bool = ...
+    ) -> None: ...
+    def __del__(self) -> None: ...
+    def save(
+        self,
+        filename: str | Path,
+        writer: AbstractMovieWriter | str | None = ...,
+        fps: int | None = ...,
+        dpi: float | None = ...,
+        codec: str | None = ...,
+        bitrate: int | None = ...,
+        extra_args: list[str] | None = ...,
+        metadata: dict[str, str] | None = ...,
+        extra_anim: list[Animation] | None = ...,
+        savefig_kwargs: dict[str, Any] | None = ...,
+        *,
+        progress_callback: Callable[[int, int], Any] | None = ...
+    ) -> None: ...
+    def new_frame_seq(self) -> Iterable[Artist]: ...
+    def new_saved_frame_seq(self) -> Iterable[Artist]: ...
+    def to_html5_video(self, embed_limit: float | None = ...) -> str: ...
+    def to_jshtml(
+        self,
+        fps: int | None = ...,
+        embed_frames: bool = ...,
+        default_mode: str | None = ...,
+    ) -> str: ...
+    def _repr_html_(self) -> str: ...
+    def pause(self) -> None: ...
+    def resume(self) -> None: ...
+
+class TimedAnimation(Animation):
+    def __init__(
+        self,
+        fig: Figure,
+        interval: int = ...,
+        repeat_delay: int = ...,
+        repeat: bool = ...,
+        event_source: TimerBase | None = ...,
+        *args,
+        **kwargs
+    ) -> None: ...
+
+class ArtistAnimation(TimedAnimation):
+    def __init__(self, fig: Figure, artists: Sequence[Collection[Artist]], *args, **kwargs) -> None: ...
+
+class FuncAnimation(TimedAnimation):
+    def __init__(
+        self,
+        fig: Figure,
+        func: Callable[..., Iterable[Artist]],
+        frames: Iterable | int | Callable[[], Generator] | None = ...,
+        init_func: Callable[[], Iterable[Artist]] | None = ...,
+        fargs: tuple[Any, ...] | None = ...,
+        save_count: int | None = ...,
+        *,
+        cache_frame_data: bool = ...,
+        **kwargs
+    ) -> None: ...

moondream/lib/python3.10/site-packages/matplotlib/artist.py

@@ -0,0 +1,1855 @@
+from collections import namedtuple
+import contextlib
+from functools import cache, reduce, wraps
+import inspect
+from inspect import Signature, Parameter
+import logging
+from numbers import Number, Real
+import operator
+import re
+import warnings
+
+import numpy as np
+
+import matplotlib as mpl
+from . import _api, cbook
+from .path import Path
+from .transforms import (BboxBase, Bbox, IdentityTransform, Transform, TransformedBbox,
+                         TransformedPatchPath, TransformedPath)
+
+_log = logging.getLogger(__name__)
+
+
+def _prevent_rasterization(draw):
+    # We assume that by default artists are not allowed to rasterize (unless
+    # its draw method is explicitly decorated). If it is being drawn after a
+    # rasterized artist and it has reached a raster_depth of 0, we stop
+    # rasterization so that it does not affect the behavior of normal artist
+    # (e.g., change in dpi).
+
+    @wraps(draw)
+    def draw_wrapper(artist, renderer, *args, **kwargs):
+        if renderer._raster_depth == 0 and renderer._rasterizing:
+            # Only stop when we are not in a rasterized parent
+            # and something has been rasterized since last stop.
+            renderer.stop_rasterizing()
+            renderer._rasterizing = False
+
+        return draw(artist, renderer, *args, **kwargs)
+
+    draw_wrapper._supports_rasterization = False
+    return draw_wrapper
+
+
+def allow_rasterization(draw):
+    """
+    Decorator for Artist.draw method. Provides routines
+    that run before and after the draw call. The before and after functions
+    are useful for changing artist-dependent renderer attributes or making
+    other setup function calls, such as starting and flushing a mixed-mode
+    renderer.
+    """
+
+    @wraps(draw)
+    def draw_wrapper(artist, renderer):
+        try:
+            if artist.get_rasterized():
+                if renderer._raster_depth == 0 and not renderer._rasterizing:
+                    renderer.start_rasterizing()
+                    renderer._rasterizing = True
+                renderer._raster_depth += 1
+            else:
+                if renderer._raster_depth == 0 and renderer._rasterizing:
+                    # Only stop when we are not in a rasterized parent
+                    # and something has be rasterized since last stop
+                    renderer.stop_rasterizing()
+                    renderer._rasterizing = False
+
+            if artist.get_agg_filter() is not None:
+                renderer.start_filter()
+
+            return draw(artist, renderer)
+        finally:
+            if artist.get_agg_filter() is not None:
+                renderer.stop_filter(artist.get_agg_filter())
+            if artist.get_rasterized():
+                renderer._raster_depth -= 1
+            if (renderer._rasterizing and (fig := artist.get_figure(root=True)) and
+                    fig.suppressComposite):
+                # restart rasterizing to prevent merging
+                renderer.stop_rasterizing()
+                renderer.start_rasterizing()
+
+    draw_wrapper._supports_rasterization = True
+    return draw_wrapper
+
+
+def _finalize_rasterization(draw):
+    """
+    Decorator for Artist.draw method. Needed on the outermost artist, i.e.
+    Figure, to finish up if the render is still in rasterized mode.
+    """
+    @wraps(draw)
+    def draw_wrapper(artist, renderer, *args, **kwargs):
+        result = draw(artist, renderer, *args, **kwargs)
+        if renderer._rasterizing:
+            renderer.stop_rasterizing()
+            renderer._rasterizing = False
+        return result
+    return draw_wrapper
+
+
+def _stale_axes_callback(self, val):
+    if self.axes:
+        self.axes.stale = val
+
+
+_XYPair = namedtuple("_XYPair", "x y")
+
+
+class _Unset:
+    def __repr__(self):
+        return "<UNSET>"
+_UNSET = _Unset()
+
+
+class Artist:
+    """
+    Abstract base class for objects that render into a FigureCanvas.
+
+    Typically, all visible elements in a figure are subclasses of Artist.
+    """
+
+    zorder = 0
+
+    def __init_subclass__(cls):
+
+        # Decorate draw() method so that all artists are able to stop
+        # rastrization when necessary. If the artist's draw method is already
+        # decorated (has a `_supports_rasterization` attribute), it won't be
+        # decorated.
+
+        if not hasattr(cls.draw, "_supports_rasterization"):
+            cls.draw = _prevent_rasterization(cls.draw)
+
+        # Inject custom set() methods into the subclass with signature and
+        # docstring based on the subclasses' properties.
+
+        if not hasattr(cls.set, '_autogenerated_signature'):
+            # Don't overwrite cls.set if the subclass or one of its parents
+            # has defined a set method set itself.
+            # If there was no explicit definition, cls.set is inherited from
+            # the hierarchy of auto-generated set methods, which hold the
+            # flag _autogenerated_signature.
+            return
+
+        cls.set = lambda self, **kwargs: Artist.set(self, **kwargs)
+        cls.set.__name__ = "set"
+        cls.set.__qualname__ = f"{cls.__qualname__}.set"
+        cls._update_set_signature_and_docstring()
+
+    _PROPERTIES_EXCLUDED_FROM_SET = [
+        'navigate_mode',  # not a user-facing function
+        'figure',         # changing the figure is such a profound operation
+                          # that we don't want this in set()
+        '3d_properties',  # cannot be used as a keyword due to leading digit
+    ]
+
+    @classmethod
+    def _update_set_signature_and_docstring(cls):
+        """
+        Update the signature of the set function to list all properties
+        as keyword arguments.
+
+        Property aliases are not listed in the signature for brevity, but
+        are still accepted as keyword arguments.
+        """
+        cls.set.__signature__ = Signature(
+            [Parameter("self", Parameter.POSITIONAL_OR_KEYWORD),
+             *[Parameter(prop, Parameter.KEYWORD_ONLY, default=_UNSET)
+               for prop in ArtistInspector(cls).get_setters()
+               if prop not in Artist._PROPERTIES_EXCLUDED_FROM_SET]])
+        cls.set._autogenerated_signature = True
+
+        cls.set.__doc__ = (
+            "Set multiple properties at once.\n\n"
+            "Supported properties are\n\n"
+            + kwdoc(cls))
+
+    def __init__(self):
+        self._stale = True
+        self.stale_callback = None
+        self._axes = None
+        self._parent_figure = None
+
+        self._transform = None
+        self._transformSet = False
+        self._visible = True
+        self._animated = False
+        self._alpha = None
+        self.clipbox = None
+        self._clippath = None
+        self._clipon = True
+        self._label = ''
+        self._picker = None
+        self._rasterized = False
+        self._agg_filter = None
+        # Normally, artist classes need to be queried for mouseover info if and
+        # only if they override get_cursor_data.
+        self._mouseover = type(self).get_cursor_data != Artist.get_cursor_data
+        self._callbacks = cbook.CallbackRegistry(signals=["pchanged"])
+        try:
+            self.axes = None
+        except AttributeError:
+            # Handle self.axes as a read-only property, as in Figure.
+            pass
+        self._remove_method = None
+        self._url = None
+        self._gid = None
+        self._snap = None
+        self._sketch = mpl.rcParams['path.sketch']
+        self._path_effects = mpl.rcParams['path.effects']
+        self._sticky_edges = _XYPair([], [])
+        self._in_layout = True
+
+    def __getstate__(self):
+        d = self.__dict__.copy()
+        d['stale_callback'] = None
+        return d
+
+    def remove(self):
+        """
+        Remove the artist from the figure if possible.
+
+        The effect will not be visible until the figure is redrawn, e.g.,
+        with `.FigureCanvasBase.draw_idle`.  Call `~.axes.Axes.relim` to
+        update the Axes limits if desired.
+
+        Note: `~.axes.Axes.relim` will not see collections even if the
+        collection was added to the Axes with *autolim* = True.
+
+        Note: there is no support for removing the artist's legend entry.
+        """
+
+        # There is no method to set the callback.  Instead, the parent should
+        # set the _remove_method attribute directly.  This would be a
+        # protected attribute if Python supported that sort of thing.  The
+        # callback has one parameter, which is the child to be removed.
+        if self._remove_method is not None:
+            self._remove_method(self)
+            # clear stale callback
+            self.stale_callback = None
+            _ax_flag = False
+            if hasattr(self, 'axes') and self.axes:
+                # remove from the mouse hit list
+                self.axes._mouseover_set.discard(self)
+                self.axes.stale = True
+                self.axes = None  # decouple the artist from the Axes
+                _ax_flag = True
+
+            if (fig := self.get_figure(root=False)) is not None:
+                if not _ax_flag:
+                    fig.stale = True
+                self._parent_figure = None
+
+        else:
+            raise NotImplementedError('cannot remove artist')
+        # TODO: the fix for the collections relim problem is to move the
+        # limits calculation into the artist itself, including the property of
+        # whether or not the artist should affect the limits.  Then there will
+        # be no distinction between axes.add_line, axes.add_patch, etc.
+        # TODO: add legend support
+
+    def have_units(self):
+        """Return whether units are set on any axis."""
+        ax = self.axes
+        return ax and any(axis.have_units() for axis in ax._axis_map.values())
+
+    def convert_xunits(self, x):
+        """
+        Convert *x* using the unit type of the xaxis.
+
+        If the artist is not contained in an Axes or if the xaxis does not
+        have units, *x* itself is returned.
+        """
+        ax = getattr(self, 'axes', None)
+        if ax is None or ax.xaxis is None:
+            return x
+        return ax.xaxis.convert_units(x)
+
+    def convert_yunits(self, y):
+        """
+        Convert *y* using the unit type of the yaxis.
+
+        If the artist is not contained in an Axes or if the yaxis does not
+        have units, *y* itself is returned.
+        """
+        ax = getattr(self, 'axes', None)
+        if ax is None or ax.yaxis is None:
+            return y
+        return ax.yaxis.convert_units(y)
+
+    @property
+    def axes(self):
+        """The `~.axes.Axes` instance the artist resides in, or *None*."""
+        return self._axes
+
+    @axes.setter
+    def axes(self, new_axes):
+        if (new_axes is not None and self._axes is not None
+                and new_axes != self._axes):
+            raise ValueError("Can not reset the Axes. You are probably trying to reuse "
+                             "an artist in more than one Axes which is not supported")
+        self._axes = new_axes
+        if new_axes is not None and new_axes is not self:
+            self.stale_callback = _stale_axes_callback
+
+    @property
+    def stale(self):
+        """
+        Whether the artist is 'stale' and needs to be re-drawn for the output
+        to match the internal state of the artist.
+        """
+        return self._stale
+
+    @stale.setter
+    def stale(self, val):
+        self._stale = val
+
+        # if the artist is animated it does not take normal part in the
+        # draw stack and is not expected to be drawn as part of the normal
+        # draw loop (when not saving) so do not propagate this change
+        if self._animated:
+            return
+
+        if val and self.stale_callback is not None:
+            self.stale_callback(self, val)
+
+    def get_window_extent(self, renderer=None):
+        """
+        Get the artist's bounding box in display space.
+
+        The bounding box' width and height are nonnegative.
+
+        Subclasses should override for inclusion in the bounding box
+        "tight" calculation. Default is to return an empty bounding
+        box at 0, 0.
+
+        Be careful when using this function, the results will not update
+        if the artist window extent of the artist changes.  The extent
+        can change due to any changes in the transform stack, such as
+        changing the Axes limits, the figure size, or the canvas used
+        (as is done when saving a figure).  This can lead to unexpected
+        behavior where interactive figures will look fine on the screen,
+        but will save incorrectly.
+        """
+        return Bbox([[0, 0], [0, 0]])
+
+    def get_tightbbox(self, renderer=None):
+        """
+        Like `.Artist.get_window_extent`, but includes any clipping.
+
+        Parameters
+        ----------
+        renderer : `~matplotlib.backend_bases.RendererBase` subclass, optional
+            renderer that will be used to draw the figures (i.e.
+            ``fig.canvas.get_renderer()``)
+
+        Returns
+        -------
+        `.Bbox` or None
+            The enclosing bounding box (in figure pixel coordinates).
+            Returns None if clipping results in no intersection.
+        """
+        bbox = self.get_window_extent(renderer)
+        if self.get_clip_on():
+            clip_box = self.get_clip_box()
+            if clip_box is not None:
+                bbox = Bbox.intersection(bbox, clip_box)
+            clip_path = self.get_clip_path()
+            if clip_path is not None and bbox is not None:
+                clip_path = clip_path.get_fully_transformed_path()
+                bbox = Bbox.intersection(bbox, clip_path.get_extents())
+        return bbox
+
+    def add_callback(self, func):
+        """
+        Add a callback function that will be called whenever one of the
+        `.Artist`'s properties changes.
+
+        Parameters
+        ----------
+        func : callable
+            The callback function. It must have the signature::
+
+                def func(artist: Artist) -> Any
+
+            where *artist* is the calling `.Artist`. Return values may exist
+            but are ignored.
+
+        Returns
+        -------
+        int
+            The observer id associated with the callback. This id can be
+            used for removing the callback with `.remove_callback` later.
+
+        See Also
+        --------
+        remove_callback
+        """
+        # Wrapping func in a lambda ensures it can be connected multiple times
+        # and never gets weakref-gc'ed.
+        return self._callbacks.connect("pchanged", lambda: func(self))
+
+    def remove_callback(self, oid):
+        """
+        Remove a callback based on its observer id.
+
+        See Also
+        --------
+        add_callback
+        """
+        self._callbacks.disconnect(oid)
+
+    def pchanged(self):
+        """
+        Call all of the registered callbacks.
+
+        This function is triggered internally when a property is changed.
+
+        See Also
+        --------
+        add_callback
+        remove_callback
+        """
+        self._callbacks.process("pchanged")
+
+    def is_transform_set(self):
+        """
+        Return whether the Artist has an explicitly set transform.
+
+        This is *True* after `.set_transform` has been called.
+        """
+        return self._transformSet
+
+    def set_transform(self, t):
+        """
+        Set the artist transform.
+
+        Parameters
+        ----------
+        t : `~matplotlib.transforms.Transform`
+        """
+        self._transform = t
+        self._transformSet = True
+        self.pchanged()
+        self.stale = True
+
+    def get_transform(self):
+        """Return the `.Transform` instance used by this artist."""
+        if self._transform is None:
+            self._transform = IdentityTransform()
+        elif (not isinstance(self._transform, Transform)
+              and hasattr(self._transform, '_as_mpl_transform')):
+            self._transform = self._transform._as_mpl_transform(self.axes)
+        return self._transform
+
+    def get_children(self):
+        r"""Return a list of the child `.Artist`\s of this `.Artist`."""
+        return []
+
+    def _different_canvas(self, event):
+        """
+        Check whether an *event* occurred on a canvas other that this artist's canvas.
+
+        If this method returns True, the event definitely occurred on a different
+        canvas; if it returns False, either it occurred on the same canvas, or we may
+        not have enough information to know.
+
+        Subclasses should start their definition of `contains` as follows::
+
+            if self._different_canvas(mouseevent):
+                return False, {}
+            # subclass-specific implementation follows
+        """
+        return (getattr(event, "canvas", None) is not None
+                and (fig := self.get_figure(root=True)) is not None
+                and event.canvas is not fig.canvas)
+
+    def contains(self, mouseevent):
+        """
+        Test whether the artist contains the mouse event.
+
+        Parameters
+        ----------
+        mouseevent : `~matplotlib.backend_bases.MouseEvent`
+
+        Returns
+        -------
+        contains : bool
+            Whether any values are within the radius.
+        details : dict
+            An artist-specific dictionary of details of the event context,
+            such as which points are contained in the pick radius. See the
+            individual Artist subclasses for details.
+        """
+        _log.warning("%r needs 'contains' method", self.__class__.__name__)
+        return False, {}
+
+    def pickable(self):
+        """
+        Return whether the artist is pickable.
+
+        See Also
+        --------
+        .Artist.set_picker, .Artist.get_picker, .Artist.pick
+        """
+        return self.get_figure(root=False) is not None and self._picker is not None
+
+    def pick(self, mouseevent):
+        """
+        Process a pick event.
+
+        Each child artist will fire a pick event if *mouseevent* is over
+        the artist and the artist has picker set.
+
+        See Also
+        --------
+        .Artist.set_picker, .Artist.get_picker, .Artist.pickable
+        """
+        from .backend_bases import PickEvent  # Circular import.
+        # Pick self
+        if self.pickable():
+            picker = self.get_picker()
+            if callable(picker):
+                inside, prop = picker(self, mouseevent)
+            else:
+                inside, prop = self.contains(mouseevent)
+            if inside:
+                PickEvent("pick_event", self.get_figure(root=True).canvas,
+                          mouseevent, self, **prop)._process()
+
+        # Pick children
+        for a in self.get_children():
+            # make sure the event happened in the same Axes
+            ax = getattr(a, 'axes', None)
+            if (isinstance(a, mpl.figure.SubFigure)
+                    or mouseevent.inaxes is None or ax is None
+                    or mouseevent.inaxes == ax):
+                # we need to check if mouseevent.inaxes is None
+                # because some objects associated with an Axes (e.g., a
+                # tick label) can be outside the bounding box of the
+                # Axes and inaxes will be None
+                # also check that ax is None so that it traverse objects
+                # which do not have an axes property but children might
+                a.pick(mouseevent)
+
+    def set_picker(self, picker):
+        """
+        Define the picking behavior of the artist.
+
+        Parameters
+        ----------
+        picker : None or bool or float or callable
+            This can be one of the following:
+
+            - *None*: Picking is disabled for this artist (default).
+
+            - A boolean: If *True* then picking will be enabled and the
+              artist will fire a pick event if the mouse event is over
+              the artist.
+
+            - A float: If picker is a number it is interpreted as an
+              epsilon tolerance in points and the artist will fire
+              off an event if its data is within epsilon of the mouse
+              event.  For some artists like lines and patch collections,
+              the artist may provide additional data to the pick event
+              that is generated, e.g., the indices of the data within
+              epsilon of the pick event
+
+            - A function: If picker is callable, it is a user supplied
+              function which determines whether the artist is hit by the
+              mouse event::
+
+                hit, props = picker(artist, mouseevent)
+
+              to determine the hit test.  if the mouse event is over the
+              artist, return *hit=True* and props is a dictionary of
+              properties you want added to the PickEvent attributes.
+        """
+        self._picker = picker
+
+    def get_picker(self):
+        """
+        Return the picking behavior of the artist.
+
+        The possible values are described in `.Artist.set_picker`.
+
+        See Also
+        --------
+        .Artist.set_picker, .Artist.pickable, .Artist.pick
+        """
+        return self._picker
+
+    def get_url(self):
+        """Return the url."""
+        return self._url
+
+    def set_url(self, url):
+        """
+        Set the url for the artist.
+
+        Parameters
+        ----------
+        url : str
+        """
+        self._url = url
+
+    def get_gid(self):
+        """Return the group id."""
+        return self._gid
+
+    def set_gid(self, gid):
+        """
+        Set the (group) id for the artist.
+
+        Parameters
+        ----------
+        gid : str
+        """
+        self._gid = gid
+
+    def get_snap(self):
+        """
+        Return the snap setting.
+
+        See `.set_snap` for details.
+        """
+        if mpl.rcParams['path.snap']:
+            return self._snap
+        else:
+            return False
+
+    def set_snap(self, snap):
+        """
+        Set the snapping behavior.
+
+        Snapping aligns positions with the pixel grid, which results in
+        clearer images. For example, if a black line of 1px width was
+        defined at a position in between two pixels, the resulting image
+        would contain the interpolated value of that line in the pixel grid,
+        which would be a grey value on both adjacent pixel positions. In
+        contrast, snapping will move the line to the nearest integer pixel
+        value, so that the resulting image will really contain a 1px wide
+        black line.
+
+        Snapping is currently only supported by the Agg and MacOSX backends.
+
+        Parameters
+        ----------
+        snap : bool or None
+            Possible values:
+
+            - *True*: Snap vertices to the nearest pixel center.
+            - *False*: Do not modify vertex positions.
+            - *None*: (auto) If the path contains only rectilinear line
+              segments, round to the nearest pixel center.
+        """
+        self._snap = snap
+        self.stale = True
+
+    def get_sketch_params(self):
+        """
+        Return the sketch parameters for the artist.
+
+        Returns
+        -------
+        tuple or None
+
+            A 3-tuple with the following elements:
+
+            - *scale*: The amplitude of the wiggle perpendicular to the
+              source line.
+            - *length*: The length of the wiggle along the line.
+            - *randomness*: The scale factor by which the length is
+              shrunken or expanded.
+
+            Returns *None* if no sketch parameters were set.
+        """
+        return self._sketch
+
+    def set_sketch_params(self, scale=None, length=None, randomness=None):
+        """
+        Set the sketch parameters.
+
+        Parameters
+        ----------
+        scale : float, optional
+            The amplitude of the wiggle perpendicular to the source
+            line, in pixels.  If scale is `None`, or not provided, no
+            sketch filter will be provided.
+        length : float, optional
+             The length of the wiggle along the line, in pixels
+             (default 128.0)
+        randomness : float, optional
+            The scale factor by which the length is shrunken or
+            expanded (default 16.0)
+
+            The PGF backend uses this argument as an RNG seed and not as
+            described above. Using the same seed yields the same random shape.
+
+            .. ACCEPTS: (scale: float, length: float, randomness: float)
+        """
+        if scale is None:
+            self._sketch = None
+        else:
+            self._sketch = (scale, length or 128.0, randomness or 16.0)
+        self.stale = True
+
+    def set_path_effects(self, path_effects):
+        """
+        Set the path effects.
+
+        Parameters
+        ----------
+        path_effects : list of `.AbstractPathEffect`
+        """
+        self._path_effects = path_effects
+        self.stale = True
+
+    def get_path_effects(self):
+        return self._path_effects
+
+    def get_figure(self, root=False):
+        """
+        Return the `.Figure` or `.SubFigure` instance the artist belongs to.
+
+        Parameters
+        ----------
+        root : bool, default=False
+            If False, return the (Sub)Figure this artist is on.  If True,
+            return the root Figure for a nested tree of SubFigures.
+        """
+        if root and self._parent_figure is not None:
+            return self._parent_figure.get_figure(root=True)
+
+        return self._parent_figure
+
+    def set_figure(self, fig):
+        """
+        Set the `.Figure` or `.SubFigure` instance the artist belongs to.
+
+        Parameters
+        ----------
+        fig : `~matplotlib.figure.Figure` or `~matplotlib.figure.SubFigure`
+        """
+        # if this is a no-op just return
+        if self._parent_figure is fig:
+            return
+        # if we currently have a figure (the case of both `self.figure`
+        # and *fig* being none is taken care of above) we then user is
+        # trying to change the figure an artist is associated with which
+        # is not allowed for the same reason as adding the same instance
+        # to more than one Axes
+        if self._parent_figure is not None:
+            raise RuntimeError("Can not put single artist in "
+                               "more than one figure")
+        self._parent_figure = fig
+        if self._parent_figure and self._parent_figure is not self:
+            self.pchanged()
+        self.stale = True
+
+    figure = property(get_figure, set_figure,
+                      doc=("The (Sub)Figure that the artist is on.  For more "
+                           "control, use the `get_figure` method."))
+
+    def set_clip_box(self, clipbox):
+        """
+        Set the artist's clip `.Bbox`.
+
+        Parameters
+        ----------
+        clipbox : `~matplotlib.transforms.BboxBase` or None
+            Will typically be created from a `.TransformedBbox`. For instance,
+            ``TransformedBbox(Bbox([[0, 0], [1, 1]]), ax.transAxes)`` is the default
+            clipping for an artist added to an Axes.
+
+        """
+        _api.check_isinstance((BboxBase, None), clipbox=clipbox)
+        if clipbox != self.clipbox:
+            self.clipbox = clipbox
+            self.pchanged()
+            self.stale = True
+
+    def set_clip_path(self, path, transform=None):
+        """
+        Set the artist's clip path.
+
+        Parameters
+        ----------
+        path : `~matplotlib.patches.Patch` or `.Path` or `.TransformedPath` or None
+            The clip path. If given a `.Path`, *transform* must be provided as
+            well. If *None*, a previously set clip path is removed.
+        transform : `~matplotlib.transforms.Transform`, optional
+            Only used if *path* is a `.Path`, in which case the given `.Path`
+            is converted to a `.TransformedPath` using *transform*.
+
+        Notes
+        -----
+        For efficiency, if *path* is a `.Rectangle` this method will set the
+        clipping box to the corresponding rectangle and set the clipping path
+        to ``None``.
+
+        For technical reasons (support of `~.Artist.set`), a tuple
+        (*path*, *transform*) is also accepted as a single positional
+        parameter.
+
+        .. ACCEPTS: Patch or (Path, Transform) or None
+        """
+        from matplotlib.patches import Patch, Rectangle
+
+        success = False
+        if transform is None:
+            if isinstance(path, Rectangle):
+                self.clipbox = TransformedBbox(Bbox.unit(),
+                                               path.get_transform())
+                self._clippath = None
+                success = True
+            elif isinstance(path, Patch):
+                self._clippath = TransformedPatchPath(path)
+                success = True
+            elif isinstance(path, tuple):
+                path, transform = path
+
+        if path is None:
+            self._clippath = None
+            success = True
+        elif isinstance(path, Path):
+            self._clippath = TransformedPath(path, transform)
+            success = True
+        elif isinstance(path, TransformedPatchPath):
+            self._clippath = path
+            success = True
+        elif isinstance(path, TransformedPath):
+            self._clippath = path
+            success = True
+
+        if not success:
+            raise TypeError(
+                "Invalid arguments to set_clip_path, of type "
+                f"{type(path).__name__} and {type(transform).__name__}")
+        # This may result in the callbacks being hit twice, but guarantees they
+        # will be hit at least once.
+        self.pchanged()
+        self.stale = True
+
+    def get_alpha(self):
+        """
+        Return the alpha value used for blending - not supported on all
+        backends.
+        """
+        return self._alpha
+
+    def get_visible(self):
+        """Return the visibility."""
+        return self._visible
+
+    def get_animated(self):
+        """Return whether the artist is animated."""
+        return self._animated
+
+    def get_in_layout(self):
+        """
+        Return boolean flag, ``True`` if artist is included in layout
+        calculations.
+
+        E.g. :ref:`constrainedlayout_guide`,
+        `.Figure.tight_layout()`, and
+        ``fig.savefig(fname, bbox_inches='tight')``.
+        """
+        return self._in_layout
+
+    def _fully_clipped_to_axes(self):
+        """
+        Return a boolean flag, ``True`` if the artist is clipped to the Axes
+        and can thus be skipped in layout calculations. Requires `get_clip_on`
+        is True, one of `clip_box` or `clip_path` is set, ``clip_box.extents``
+        is equivalent to ``ax.bbox.extents`` (if set), and ``clip_path._patch``
+        is equivalent to ``ax.patch`` (if set).
+        """
+        # Note that ``clip_path.get_fully_transformed_path().get_extents()``
+        # cannot be directly compared to ``axes.bbox.extents`` because the
+        # extents may be undefined (i.e. equivalent to ``Bbox.null()``)
+        # before the associated artist is drawn, and this method is meant
+        # to determine whether ``axes.get_tightbbox()`` may bypass drawing
+        clip_box = self.get_clip_box()
+        clip_path = self.get_clip_path()
+        return (self.axes is not None
+                and self.get_clip_on()
+                and (clip_box is not None or clip_path is not None)
+                and (clip_box is None
+                     or np.all(clip_box.extents == self.axes.bbox.extents))
+                and (clip_path is None
+                     or isinstance(clip_path, TransformedPatchPath)
+                     and clip_path._patch is self.axes.patch))
+
+    def get_clip_on(self):
+        """Return whether the artist uses clipping."""
+        return self._clipon
+
+    def get_clip_box(self):
+        """Return the clipbox."""
+        return self.clipbox
+
+    def get_clip_path(self):
+        """Return the clip path."""
+        return self._clippath
+
+    def get_transformed_clip_path_and_affine(self):
+        """
+        Return the clip path with the non-affine part of its
+        transformation applied, and the remaining affine part of its
+        transformation.
+        """
+        if self._clippath is not None:
+            return self._clippath.get_transformed_path_and_affine()
+        return None, None
+
+    def set_clip_on(self, b):
+        """
+        Set whether the artist uses clipping.
+
+        When False, artists will be visible outside the Axes which
+        can lead to unexpected results.
+
+        Parameters
+        ----------
+        b : bool
+        """
+        self._clipon = b
+        # This may result in the callbacks being hit twice, but ensures they
+        # are hit at least once
+        self.pchanged()
+        self.stale = True
+
+    def _set_gc_clip(self, gc):
+        """Set the clip properly for the gc."""
+        if self._clipon:
+            if self.clipbox is not None:
+                gc.set_clip_rectangle(self.clipbox)
+            gc.set_clip_path(self._clippath)
+        else:
+            gc.set_clip_rectangle(None)
+            gc.set_clip_path(None)
+
+    def get_rasterized(self):
+        """Return whether the artist is to be rasterized."""
+        return self._rasterized
+
+    def set_rasterized(self, rasterized):
+        """
+        Force rasterized (bitmap) drawing for vector graphics output.
+
+        Rasterized drawing is not supported by all artists. If you try to
+        enable this on an artist that does not support it, the command has no
+        effect and a warning will be issued.
+
+        This setting is ignored for pixel-based output.
+
+        See also :doc:`/gallery/misc/rasterization_demo`.
+
+        Parameters
+        ----------
+        rasterized : bool
+        """
+        supports_rasterization = getattr(self.draw,
+                                         "_supports_rasterization", False)
+        if rasterized and not supports_rasterization:
+            _api.warn_external(f"Rasterization of '{self}' will be ignored")
+
+        self._rasterized = rasterized
+
+    def get_agg_filter(self):
+        """Return filter function to be used for agg filter."""
+        return self._agg_filter
+
+    def set_agg_filter(self, filter_func):
+        """
+        Set the agg filter.
+
+        Parameters
+        ----------
+        filter_func : callable
+            A filter function, which takes a (m, n, depth) float array
+            and a dpi value, and returns a (m, n, depth) array and two
+            offsets from the bottom left corner of the image
+
+            .. ACCEPTS: a filter function, which takes a (m, n, 3) float array
+                and a dpi value, and returns a (m, n, 3) array and two offsets
+                from the bottom left corner of the image
+        """
+        self._agg_filter = filter_func
+        self.stale = True
+
+    def draw(self, renderer):
+        """
+        Draw the Artist (and its children) using the given renderer.
+
+        This has no effect if the artist is not visible (`.Artist.get_visible`
+        returns False).
+
+        Parameters
+        ----------
+        renderer : `~matplotlib.backend_bases.RendererBase` subclass.
+
+        Notes
+        -----
+        This method is overridden in the Artist subclasses.
+        """
+        if not self.get_visible():
+            return
+        self.stale = False
+
+    def set_alpha(self, alpha):
+        """
+        Set the alpha value used for blending - not supported on all backends.
+
+        Parameters
+        ----------
+        alpha : scalar or None
+            *alpha* must be within the 0-1 range, inclusive.
+        """
+        if alpha is not None and not isinstance(alpha, Real):
+            raise TypeError(
+                f'alpha must be numeric or None, not {type(alpha)}')
+        if alpha is not None and not (0 <= alpha <= 1):
+            raise ValueError(f'alpha ({alpha}) is outside 0-1 range')
+        if alpha != self._alpha:
+            self._alpha = alpha
+            self.pchanged()
+            self.stale = True
+
+    def _set_alpha_for_array(self, alpha):
+        """
+        Set the alpha value used for blending - not supported on all backends.
+
+        Parameters
+        ----------
+        alpha : array-like or scalar or None
+            All values must be within the 0-1 range, inclusive.
+            Masked values and nans are not supported.
+        """
+        if isinstance(alpha, str):
+            raise TypeError("alpha must be numeric or None, not a string")
+        if not np.iterable(alpha):
+            Artist.set_alpha(self, alpha)
+            return
+        alpha = np.asarray(alpha)
+        if not (0 <= alpha.min() and alpha.max() <= 1):
+            raise ValueError('alpha must be between 0 and 1, inclusive, '
+                             f'but min is {alpha.min()}, max is {alpha.max()}')
+        self._alpha = alpha
+        self.pchanged()
+        self.stale = True
+
+    def set_visible(self, b):
+        """
+        Set the artist's visibility.
+
+        Parameters
+        ----------
+        b : bool
+        """
+        if b != self._visible:
+            self._visible = b
+            self.pchanged()
+            self.stale = True
+
+    def set_animated(self, b):
+        """
+        Set whether the artist is intended to be used in an animation.
+
+        If True, the artist is excluded from regular drawing of the figure.
+        You have to call `.Figure.draw_artist` / `.Axes.draw_artist`
+        explicitly on the artist. This approach is used to speed up animations
+        using blitting.
+
+        See also `matplotlib.animation` and
+        :ref:`blitting`.
+
+        Parameters
+        ----------
+        b : bool
+        """
+        if self._animated != b:
+            self._animated = b
+            self.pchanged()
+
+    def set_in_layout(self, in_layout):
+        """
+        Set if artist is to be included in layout calculations,
+        E.g. :ref:`constrainedlayout_guide`,
+        `.Figure.tight_layout()`, and
+        ``fig.savefig(fname, bbox_inches='tight')``.
+
+        Parameters
+        ----------
+        in_layout : bool
+        """
+        self._in_layout = in_layout
+
+    def get_label(self):
+        """Return the label used for this artist in the legend."""
+        return self._label
+
+    def set_label(self, s):
+        """
+        Set a label that will be displayed in the legend.
+
+        Parameters
+        ----------
+        s : object
+            *s* will be converted to a string by calling `str`.
+        """
+        label = str(s) if s is not None else None
+        if label != self._label:
+            self._label = label
+            self.pchanged()
+            self.stale = True
+
+    def get_zorder(self):
+        """Return the artist's zorder."""
+        return self.zorder
+
+    def set_zorder(self, level):
+        """
+        Set the zorder for the artist.  Artists with lower zorder
+        values are drawn first.
+
+        Parameters
+        ----------
+        level : float
+        """
+        if level is None:
+            level = self.__class__.zorder
+        if level != self.zorder:
+            self.zorder = level
+            self.pchanged()
+            self.stale = True
+
+    @property
+    def sticky_edges(self):
+        """
+        ``x`` and ``y`` sticky edge lists for autoscaling.
+
+        When performing autoscaling, if a data limit coincides with a value in
+        the corresponding sticky_edges list, then no margin will be added--the
+        view limit "sticks" to the edge. A typical use case is histograms,
+        where one usually expects no margin on the bottom edge (0) of the
+        histogram.
+
+        Moreover, margin expansion "bumps" against sticky edges and cannot
+        cross them.  For example, if the upper data limit is 1.0, the upper
+        view limit computed by simple margin application is 1.2, but there is a
+        sticky edge at 1.1, then the actual upper view limit will be 1.1.
+
+        This attribute cannot be assigned to; however, the ``x`` and ``y``
+        lists can be modified in place as needed.
+
+        Examples
+        --------
+        >>> artist.sticky_edges.x[:] = (xmin, xmax)
+        >>> artist.sticky_edges.y[:] = (ymin, ymax)
+
+        """
+        return self._sticky_edges
+
+    def update_from(self, other):
+        """Copy properties from *other* to *self*."""
+        self._transform = other._transform
+        self._transformSet = other._transformSet
+        self._visible = other._visible
+        self._alpha = other._alpha
+        self.clipbox = other.clipbox
+        self._clipon = other._clipon
+        self._clippath = other._clippath
+        self._label = other._label
+        self._sketch = other._sketch
+        self._path_effects = other._path_effects
+        self.sticky_edges.x[:] = other.sticky_edges.x.copy()
+        self.sticky_edges.y[:] = other.sticky_edges.y.copy()
+        self.pchanged()
+        self.stale = True
+
+    def properties(self):
+        """Return a dictionary of all the properties of the artist."""
+        return ArtistInspector(self).properties()
+
+    def _update_props(self, props, errfmt):
+        """
+        Helper for `.Artist.set` and `.Artist.update`.
+
+        *errfmt* is used to generate error messages for invalid property
+        names; it gets formatted with ``type(self)`` for "{cls}" and the
+        property name for "{prop_name}".
+        """
+        ret = []
+        with cbook._setattr_cm(self, eventson=False):
+            for k, v in props.items():
+                # Allow attributes we want to be able to update through
+                # art.update, art.set, setp.
+                if k == "axes":
+                    ret.append(setattr(self, k, v))
+                else:
+                    func = getattr(self, f"set_{k}", None)
+                    if not callable(func):
+                        raise AttributeError(
+                            errfmt.format(cls=type(self), prop_name=k),
+                            name=k)
+                    ret.append(func(v))
+        if ret:
+            self.pchanged()
+            self.stale = True
+        return ret
+
+    def update(self, props):
+        """
+        Update this artist's properties from the dict *props*.
+
+        Parameters
+        ----------
+        props : dict
+        """
+        return self._update_props(
+            props, "{cls.__name__!r} object has no property {prop_name!r}")
+
+    def _internal_update(self, kwargs):
+        """
+        Update artist properties without prenormalizing them, but generating
+        errors as if calling `set`.
+
+        The lack of prenormalization is to maintain backcompatibility.
+        """
+        return self._update_props(
+            kwargs, "{cls.__name__}.set() got an unexpected keyword argument "
+            "{prop_name!r}")
+
+    def set(self, **kwargs):
+        # docstring and signature are auto-generated via
+        # Artist._update_set_signature_and_docstring() at the end of the
+        # module.
+        return self._internal_update(cbook.normalize_kwargs(kwargs, self))
+
+    @contextlib.contextmanager
+    def _cm_set(self, **kwargs):
+        """
+        `.Artist.set` context-manager that restores original values at exit.
+        """
+        orig_vals = {k: getattr(self, f"get_{k}")() for k in kwargs}
+        try:
+            self.set(**kwargs)
+            yield
+        finally:
+            self.set(**orig_vals)
+
+    def findobj(self, match=None, include_self=True):
+        """
+        Find artist objects.
+
+        Recursively find all `.Artist` instances contained in the artist.
+
+        Parameters
+        ----------
+        match
+            A filter criterion for the matches. This can be
+
+            - *None*: Return all objects contained in artist.
+            - A function with signature ``def match(artist: Artist) -> bool``.
+              The result will only contain artists for which the function
+              returns *True*.
+            - A class instance: e.g., `.Line2D`. The result will only contain
+              artists of this class or its subclasses (``isinstance`` check).
+
+        include_self : bool
+            Include *self* in the list to be checked for a match.
+
+        Returns
+        -------
+        list of `.Artist`
+
+        """
+        if match is None:  # always return True
+            def matchfunc(x):
+                return True
+        elif isinstance(match, type) and issubclass(match, Artist):
+            def matchfunc(x):
+                return isinstance(x, match)
+        elif callable(match):
+            matchfunc = match
+        else:
+            raise ValueError('match must be None, a matplotlib.artist.Artist '
+                             'subclass, or a callable')
+
+        artists = reduce(operator.iadd,
+                         [c.findobj(matchfunc) for c in self.get_children()], [])
+        if include_self and matchfunc(self):
+            artists.append(self)
+        return artists
+
+    def get_cursor_data(self, event):
+        """
+        Return the cursor data for a given event.
+
+        .. note::
+            This method is intended to be overridden by artist subclasses.
+            As an end-user of Matplotlib you will most likely not call this
+            method yourself.
+
+        Cursor data can be used by Artists to provide additional context
+        information for a given event. The default implementation just returns
+        *None*.
+
+        Subclasses can override the method and return arbitrary data. However,
+        when doing so, they must ensure that `.format_cursor_data` can convert
+        the data to a string representation.
+
+        The only current use case is displaying the z-value of an `.AxesImage`
+        in the status bar of a plot window, while moving the mouse.
+
+        Parameters
+        ----------
+        event : `~matplotlib.backend_bases.MouseEvent`
+
+        See Also
+        --------
+        format_cursor_data
+
+        """
+        return None
+
+    def format_cursor_data(self, data):
+        """
+        Return a string representation of *data*.
+
+        .. note::
+            This method is intended to be overridden by artist subclasses.
+            As an end-user of Matplotlib you will most likely not call this
+            method yourself.
+
+        The default implementation converts ints and floats and arrays of ints
+        and floats into a comma-separated string enclosed in square brackets,
+        unless the artist has an associated colorbar, in which case scalar
+        values are formatted using the colorbar's formatter.
+
+        See Also
+        --------
+        get_cursor_data
+        """
+        if np.ndim(data) == 0 and hasattr(self, "_format_cursor_data_override"):
+            # workaround for ScalarMappable to be able to define its own
+            # format_cursor_data(). See ScalarMappable._format_cursor_data_override
+            # for details.
+            return self._format_cursor_data_override(data)
+        else:
+            try:
+                data[0]
+            except (TypeError, IndexError):
+                data = [data]
+            data_str = ', '.join(f'{item:0.3g}' for item in data
+                                 if isinstance(item, Number))
+            return "[" + data_str + "]"
+
+    def get_mouseover(self):
+        """
+        Return whether this artist is queried for custom context information
+        when the mouse cursor moves over it.
+        """
+        return self._mouseover
+
+    def set_mouseover(self, mouseover):
+        """
+        Set whether this artist is queried for custom context information when
+        the mouse cursor moves over it.
+
+        Parameters
+        ----------
+        mouseover : bool
+
+        See Also
+        --------
+        get_cursor_data
+        .ToolCursorPosition
+        .NavigationToolbar2
+        """
+        self._mouseover = bool(mouseover)
+        ax = self.axes
+        if ax:
+            if self._mouseover:
+                ax._mouseover_set.add(self)
+            else:
+                ax._mouseover_set.discard(self)
+
+    mouseover = property(get_mouseover, set_mouseover)  # backcompat.
+
+
+def _get_tightbbox_for_layout_only(obj, *args, **kwargs):
+    """
+    Matplotlib's `.Axes.get_tightbbox` and `.Axis.get_tightbbox` support a
+    *for_layout_only* kwarg; this helper tries to use the kwarg but skips it
+    when encountering third-party subclasses that do not support it.
+    """
+    try:
+        return obj.get_tightbbox(*args, **{**kwargs, "for_layout_only": True})
+    except TypeError:
+        return obj.get_tightbbox(*args, **kwargs)
+
+
+class ArtistInspector:
+    """
+    A helper class to inspect an `~matplotlib.artist.Artist` and return
+    information about its settable properties and their current values.
+    """
+
+    def __init__(self, o):
+        r"""
+        Initialize the artist inspector with an `Artist` or an iterable of
+        `Artist`\s.  If an iterable is used, we assume it is a homogeneous
+        sequence (all `Artist`\s are of the same type) and it is your
+        responsibility to make sure this is so.
+        """
+        if not isinstance(o, Artist):
+            if np.iterable(o):
+                o = list(o)
+                if len(o):
+                    o = o[0]
+
+        self.oorig = o
+        if not isinstance(o, type):
+            o = type(o)
+        self.o = o
+
+        self.aliasd = self.get_aliases()
+
+    def get_aliases(self):
+        """
+        Get a dict mapping property fullnames to sets of aliases for each alias
+        in the :class:`~matplotlib.artist.ArtistInspector`.
+
+        e.g., for lines::
+
+          {'markerfacecolor': {'mfc'},
+           'linewidth'      : {'lw'},
+          }
+        """
+        names = [name for name in dir(self.o)
+                 if name.startswith(('set_', 'get_'))
+                    and callable(getattr(self.o, name))]
+        aliases = {}
+        for name in names:
+            func = getattr(self.o, name)
+            if not self.is_alias(func):
+                continue
+            propname = re.search(f"`({name[:4]}.*)`",  # get_.*/set_.*
+                                 inspect.getdoc(func)).group(1)
+            aliases.setdefault(propname[4:], set()).add(name[4:])
+        return aliases
+
+    _get_valid_values_regex = re.compile(
+        r"\n\s*(?:\.\.\s+)?ACCEPTS:\s*((?:.|\n)*?)(?:$|(?:\n\n))"
+    )
+
+    def get_valid_values(self, attr):
+        """
+        Get the legal arguments for the setter associated with *attr*.
+
+        This is done by querying the docstring of the setter for a line that
+        begins with "ACCEPTS:" or ".. ACCEPTS:", and then by looking for a
+        numpydoc-style documentation for the setter's first argument.
+        """
+
+        name = 'set_%s' % attr
+        if not hasattr(self.o, name):
+            raise AttributeError(f'{self.o} has no function {name}')
+        func = getattr(self.o, name)
+
+        if hasattr(func, '_kwarg_doc'):
+            return func._kwarg_doc
+
+        docstring = inspect.getdoc(func)
+        if docstring is None:
+            return 'unknown'
+
+        if docstring.startswith('Alias for '):
+            return None
+
+        match = self._get_valid_values_regex.search(docstring)
+        if match is not None:
+            return re.sub("\n *", " ", match.group(1))
+
+        # Much faster than list(inspect.signature(func).parameters)[1],
+        # although barely relevant wrt. matplotlib's total import time.
+        param_name = func.__code__.co_varnames[1]
+        # We could set the presence * based on whether the parameter is a
+        # varargs (it can't be a varkwargs) but it's not really worth it.
+        match = re.search(fr"(?m)^ *\*?{param_name} : (.+)", docstring)
+        if match:
+            return match.group(1)
+
+        return 'unknown'
+
+    def _replace_path(self, source_class):
+        """
+        Changes the full path to the public API path that is used
+        in sphinx. This is needed for links to work.
+        """
+        replace_dict = {'_base._AxesBase': 'Axes',
+                        '_axes.Axes': 'Axes'}
+        for key, value in replace_dict.items():
+            source_class = source_class.replace(key, value)
+        return source_class
+
+    def get_setters(self):
+        """
+        Get the attribute strings with setters for object.
+
+        For example, for a line, return ``['markerfacecolor', 'linewidth',
+        ....]``.
+        """
+        setters = []
+        for name in dir(self.o):
+            if not name.startswith('set_'):
+                continue
+            func = getattr(self.o, name)
+            if (not callable(func)
+                    or self.number_of_parameters(func) < 2
+                    or self.is_alias(func)):
+                continue
+            setters.append(name[4:])
+        return setters
+
+    @staticmethod
+    @cache
+    def number_of_parameters(func):
+        """Return number of parameters of the callable *func*."""
+        return len(inspect.signature(func).parameters)
+
+    @staticmethod
+    @cache
+    def is_alias(method):
+        """
+        Return whether the object *method* is an alias for another method.
+        """
+
+        ds = inspect.getdoc(method)
+        if ds is None:
+            return False
+
+        return ds.startswith('Alias for ')
+
+    def aliased_name(self, s):
+        """
+        Return 'PROPNAME or alias' if *s* has an alias, else return 'PROPNAME'.
+
+        For example, for the line markerfacecolor property, which has an
+        alias, return 'markerfacecolor or mfc' and for the transform
+        property, which does not, return 'transform'.
+        """
+        aliases = ''.join(' or %s' % x for x in sorted(self.aliasd.get(s, [])))
+        return s + aliases
+
+    _NOT_LINKABLE = {
+        # A set of property setter methods that are not available in our
+        # current docs. This is a workaround used to prevent trying to link
+        # these setters which would lead to "target reference not found"
+        # warnings during doc build.
+        'matplotlib.image._ImageBase.set_alpha',
+        'matplotlib.image._ImageBase.set_array',
+        'matplotlib.image._ImageBase.set_data',
+        'matplotlib.image._ImageBase.set_filternorm',
+        'matplotlib.image._ImageBase.set_filterrad',
+        'matplotlib.image._ImageBase.set_interpolation',
+        'matplotlib.image._ImageBase.set_interpolation_stage',
+        'matplotlib.image._ImageBase.set_resample',
+        'matplotlib.text._AnnotationBase.set_annotation_clip',
+    }
+
+    def aliased_name_rest(self, s, target):
+        """
+        Return 'PROPNAME or alias' if *s* has an alias, else return 'PROPNAME',
+        formatted for reST.
+
+        For example, for the line markerfacecolor property, which has an
+        alias, return 'markerfacecolor or mfc' and for the transform
+        property, which does not, return 'transform'.
+        """
+        # workaround to prevent "reference target not found"
+        if target in self._NOT_LINKABLE:
+            return f'``{s}``'
+
+        aliases = ''.join(
+            f' or :meth:`{a} <{target}>`' for a in sorted(self.aliasd.get(s, [])))
+        return f':meth:`{s} <{target}>`{aliases}'
+
+    def pprint_setters(self, prop=None, leadingspace=2):
+        """
+        If *prop* is *None*, return a list of strings of all settable
+        properties and their valid values.
+
+        If *prop* is not *None*, it is a valid property name and that
+        property will be returned as a string of property : valid
+        values.
+        """
+        if leadingspace:
+            pad = ' ' * leadingspace
+        else:
+            pad = ''
+        if prop is not None:
+            accepts = self.get_valid_values(prop)
+            return f'{pad}{prop}: {accepts}'
+
+        lines = []
+        for prop in sorted(self.get_setters()):
+            accepts = self.get_valid_values(prop)
+            name = self.aliased_name(prop)
+            lines.append(f'{pad}{name}: {accepts}')
+        return lines
+
+    def pprint_setters_rest(self, prop=None, leadingspace=4):
+        """
+        If *prop* is *None*, return a list of reST-formatted strings of all
+        settable properties and their valid values.
+
+        If *prop* is not *None*, it is a valid property name and that
+        property will be returned as a string of "property : valid"
+        values.
+        """
+        if leadingspace:
+            pad = ' ' * leadingspace
+        else:
+            pad = ''
+        if prop is not None:
+            accepts = self.get_valid_values(prop)
+            return f'{pad}{prop}: {accepts}'
+
+        prop_and_qualnames = []
+        for prop in sorted(self.get_setters()):
+            # Find the parent method which actually provides the docstring.
+            for cls in self.o.__mro__:
+                method = getattr(cls, f"set_{prop}", None)
+                if method and method.__doc__ is not None:
+                    break
+            else:  # No docstring available.
+                method = getattr(self.o, f"set_{prop}")
+            prop_and_qualnames.append(
+                (prop, f"{method.__module__}.{method.__qualname__}"))
+
+        names = [self.aliased_name_rest(prop, target)
+                 .replace('_base._AxesBase', 'Axes')
+                 .replace('_axes.Axes', 'Axes')
+                 for prop, target in prop_and_qualnames]
+        accepts = [self.get_valid_values(prop)
+                   for prop, _ in prop_and_qualnames]
+
+        col0_len = max(len(n) for n in names)
+        col1_len = max(len(a) for a in accepts)
+        table_formatstr = pad + '   ' + '=' * col0_len + '   ' + '=' * col1_len
+
+        return [
+            '',
+            pad + '.. table::',
+            pad + '   :class: property-table',
+            '',
+            table_formatstr,
+            pad + '   ' + 'Property'.ljust(col0_len)
+            + '   ' + 'Description'.ljust(col1_len),
+            table_formatstr,
+            *[pad + '   ' + n.ljust(col0_len) + '   ' + a.ljust(col1_len)
+              for n, a in zip(names, accepts)],
+            table_formatstr,
+            '',
+        ]
+
+    def properties(self):
+        """Return a dictionary mapping property name -> value."""
+        o = self.oorig
+        getters = [name for name in dir(o)
+                   if name.startswith('get_') and callable(getattr(o, name))]
+        getters.sort()
+        d = {}
+        for name in getters:
+            func = getattr(o, name)
+            if self.is_alias(func):
+                continue
+            try:
+                with warnings.catch_warnings():
+                    warnings.simplefilter('ignore')
+                    val = func()
+            except Exception:
+                continue
+            else:
+                d[name[4:]] = val
+        return d
+
+    def pprint_getters(self):
+        """Return the getters and actual values as list of strings."""
+        lines = []
+        for name, val in sorted(self.properties().items()):
+            if getattr(val, 'shape', ()) != () and len(val) > 6:
+                s = str(val[:6]) + '...'
+            else:
+                s = str(val)
+            s = s.replace('\n', ' ')
+            if len(s) > 50:
+                s = s[:50] + '...'
+            name = self.aliased_name(name)
+            lines.append(f'    {name} = {s}')
+        return lines
+
+
+def getp(obj, property=None):
+    """
+    Return the value of an `.Artist`'s *property*, or print all of them.
+
+    Parameters
+    ----------
+    obj : `~matplotlib.artist.Artist`
+        The queried artist; e.g., a `.Line2D`, a `.Text`, or an `~.axes.Axes`.
+
+    property : str or None, default: None
+        If *property* is 'somename', this function returns
+        ``obj.get_somename()``.
+
+        If it's None (or unset), it *prints* all gettable properties from
+        *obj*.  Many properties have aliases for shorter typing, e.g. 'lw' is
+        an alias for 'linewidth'.  In the output, aliases and full property
+        names will be listed as:
+
+          property or alias = value
+
+        e.g.:
+
+          linewidth or lw = 2
+
+    See Also
+    --------
+    setp
+    """
+    if property is None:
+        insp = ArtistInspector(obj)
+        ret = insp.pprint_getters()
+        print('\n'.join(ret))
+        return
+    return getattr(obj, 'get_' + property)()
+
+# alias
+get = getp
+
+
+def setp(obj, *args, file=None, **kwargs):
+    """
+    Set one or more properties on an `.Artist`, or list allowed values.
+
+    Parameters
+    ----------
+    obj : `~matplotlib.artist.Artist` or list of `.Artist`
+        The artist(s) whose properties are being set or queried.  When setting
+        properties, all artists are affected; when querying the allowed values,
+        only the first instance in the sequence is queried.
+
+        For example, two lines can be made thicker and red with a single call:
+
+        >>> x = arange(0, 1, 0.01)
+        >>> lines = plot(x, sin(2*pi*x), x, sin(4*pi*x))
+        >>> setp(lines, linewidth=2, color='r')
+
+    file : file-like, default: `sys.stdout`
+        Where `setp` writes its output when asked to list allowed values.
+
+        >>> with open('output.log') as file:
+        ...     setp(line, file=file)
+
+        The default, ``None``, means `sys.stdout`.
+
+    *args, **kwargs
+        The properties to set.  The following combinations are supported:
+
+        - Set the linestyle of a line to be dashed:
+
+          >>> line, = plot([1, 2, 3])
+          >>> setp(line, linestyle='--')
+
+        - Set multiple properties at once:
+
+          >>> setp(line, linewidth=2, color='r')
+
+        - List allowed values for a line's linestyle:
+
+          >>> setp(line, 'linestyle')
+          linestyle: {'-', '--', '-.', ':', '', (offset, on-off-seq), ...}
+
+        - List all properties that can be set, and their allowed values:
+
+          >>> setp(line)
+          agg_filter: a filter function, ...
+          [long output listing omitted]
+
+        `setp` also supports MATLAB style string/value pairs.  For example, the
+        following are equivalent:
+
+        >>> setp(lines, 'linewidth', 2, 'color', 'r')  # MATLAB style
+        >>> setp(lines, linewidth=2, color='r')        # Python style
+
+    See Also
+    --------
+    getp
+    """
+
+    if isinstance(obj, Artist):
+        objs = [obj]
+    else:
+        objs = list(cbook.flatten(obj))
+
+    if not objs:
+        return
+
+    insp = ArtistInspector(objs[0])
+
+    if not kwargs and len(args) < 2:
+        if args:
+            print(insp.pprint_setters(prop=args[0]), file=file)
+        else:
+            print('\n'.join(insp.pprint_setters()), file=file)
+        return
+
+    if len(args) % 2:
+        raise ValueError('The set args must be string, value pairs')
+
+    funcvals = dict(zip(args[::2], args[1::2]))
+    ret = [o.update(funcvals) for o in objs] + [o.set(**kwargs) for o in objs]
+    return list(cbook.flatten(ret))
+
+
+def kwdoc(artist):
+    r"""
+    Inspect an `~matplotlib.artist.Artist` class (using `.ArtistInspector`) and
+    return information about its settable properties and their current values.
+
+    Parameters
+    ----------
+    artist : `~matplotlib.artist.Artist` or an iterable of `Artist`\s
+
+    Returns
+    -------
+    str
+        The settable properties of *artist*, as plain text if
+        :rc:`docstring.hardcopy` is False and as a rst table (intended for
+        use in Sphinx) if it is True.
+    """
+    ai = ArtistInspector(artist)
+    return ('\n'.join(ai.pprint_setters_rest(leadingspace=4))
+            if mpl.rcParams['docstring.hardcopy'] else
+            'Properties:\n' + '\n'.join(ai.pprint_setters(leadingspace=4)))
+
+# We defer this to the end of them module, because it needs ArtistInspector
+# to be defined.
+Artist._update_set_signature_and_docstring()

moondream/lib/python3.10/site-packages/matplotlib/backend_bases.pyi

@@ -0,0 +1,482 @@
+from enum import Enum, IntEnum
+import os
+from matplotlib import (
+    cbook,
+    transforms,
+    widgets,
+    _api,
+)
+from matplotlib.artist import Artist
+from matplotlib.axes import Axes
+from matplotlib.backend_managers import ToolManager
+from matplotlib.backend_tools import Cursors, ToolBase
+from matplotlib.colorbar import Colorbar
+from matplotlib.figure import Figure
+from matplotlib.font_manager import FontProperties
+from matplotlib.path import Path
+from matplotlib.texmanager import TexManager
+from matplotlib.text import Text
+from matplotlib.transforms import Bbox, BboxBase, Transform, TransformedPath
+
+from collections.abc import Callable, Iterable, Sequence
+from typing import Any, IO, Literal, NamedTuple, TypeVar
+from numpy.typing import ArrayLike
+from .typing import ColorType, LineStyleType, CapStyleType, JoinStyleType
+
+def register_backend(
+    format: str, backend: str | type[FigureCanvasBase], description: str | None = ...
+) -> None: ...
+def get_registered_canvas_class(format: str) -> type[FigureCanvasBase]: ...
+
+class RendererBase:
+    def __init__(self) -> None: ...
+    def open_group(self, s: str, gid: str | None = ...) -> None: ...
+    def close_group(self, s: str) -> None: ...
+    def draw_path(
+        self,
+        gc: GraphicsContextBase,
+        path: Path,
+        transform: Transform,
+        rgbFace: ColorType | None = ...,
+    ) -> None: ...
+    def draw_markers(
+        self,
+        gc: GraphicsContextBase,
+        marker_path: Path,
+        marker_trans: Transform,
+        path: Path,
+        trans: Transform,
+        rgbFace: ColorType | None = ...,
+    ) -> None: ...
+    def draw_path_collection(
+        self,
+        gc: GraphicsContextBase,
+        master_transform: Transform,
+        paths: Sequence[Path],
+        all_transforms: Sequence[ArrayLike],
+        offsets: ArrayLike | Sequence[ArrayLike],
+        offset_trans: Transform,
+        facecolors: ColorType | Sequence[ColorType],
+        edgecolors: ColorType | Sequence[ColorType],
+        linewidths: float | Sequence[float],
+        linestyles: LineStyleType | Sequence[LineStyleType],
+        antialiaseds: bool | Sequence[bool],
+        urls: str | Sequence[str],
+        offset_position: Any,
+    ) -> None: ...
+    def draw_quad_mesh(
+        self,
+        gc: GraphicsContextBase,
+        master_transform: Transform,
+        meshWidth,
+        meshHeight,
+        coordinates: ArrayLike,
+        offsets: ArrayLike | Sequence[ArrayLike],
+        offsetTrans: Transform,
+        facecolors: Sequence[ColorType],
+        antialiased: bool,
+        edgecolors: Sequence[ColorType] | ColorType | None,
+    ) -> None: ...
+    def draw_gouraud_triangles(
+        self,
+        gc: GraphicsContextBase,
+        triangles_array: ArrayLike,
+        colors_array: ArrayLike,
+        transform: Transform,
+    ) -> None: ...
+    def get_image_magnification(self) -> float: ...
+    def draw_image(
+        self,
+        gc: GraphicsContextBase,
+        x: float,
+        y: float,
+        im: ArrayLike,
+        transform: transforms.Affine2DBase | None = ...,
+    ) -> None: ...
+    def option_image_nocomposite(self) -> bool: ...
+    def option_scale_image(self) -> bool: ...
+    def draw_tex(
+        self,
+        gc: GraphicsContextBase,
+        x: float,
+        y: float,
+        s: str,
+        prop: FontProperties,
+        angle: float,
+        *,
+        mtext: Text | None = ...
+    ) -> None: ...
+    def draw_text(
+        self,
+        gc: GraphicsContextBase,
+        x: float,
+        y: float,
+        s: str,
+        prop: FontProperties,
+        angle: float,
+        ismath: bool | Literal["TeX"] = ...,
+        mtext: Text | None = ...,
+    ) -> None: ...
+    def get_text_width_height_descent(
+        self, s: str, prop: FontProperties, ismath: bool | Literal["TeX"]
+    ) -> tuple[float, float, float]: ...
+    def flipy(self) -> bool: ...
+    def get_canvas_width_height(self) -> tuple[float, float]: ...
+    def get_texmanager(self) -> TexManager: ...
+    def new_gc(self) -> GraphicsContextBase: ...
+    def points_to_pixels(self, points: ArrayLike) -> ArrayLike: ...
+    def start_rasterizing(self) -> None: ...
+    def stop_rasterizing(self) -> None: ...
+    def start_filter(self) -> None: ...
+    def stop_filter(self, filter_func) -> None: ...
+
+class GraphicsContextBase:
+    def __init__(self) -> None: ...
+    def copy_properties(self, gc: GraphicsContextBase) -> None: ...
+    def restore(self) -> None: ...
+    def get_alpha(self) -> float: ...
+    def get_antialiased(self) -> int: ...
+    def get_capstyle(self) -> Literal["butt", "projecting", "round"]: ...
+    def get_clip_rectangle(self) -> Bbox | None: ...
+    def get_clip_path(
+        self,
+    ) -> tuple[TransformedPath, Transform] | tuple[None, None]: ...
+    def get_dashes(self) -> tuple[float, ArrayLike | None]: ...
+    def get_forced_alpha(self) -> bool: ...
+    def get_joinstyle(self) -> Literal["miter", "round", "bevel"]: ...
+    def get_linewidth(self) -> float: ...
+    def get_rgb(self) -> tuple[float, float, float, float]: ...
+    def get_url(self) -> str | None: ...
+    def get_gid(self) -> int | None: ...
+    def get_snap(self) -> bool | None: ...
+    def set_alpha(self, alpha: float) -> None: ...
+    def set_antialiased(self, b: bool) -> None: ...
+    def set_capstyle(self, cs: CapStyleType) -> None: ...
+    def set_clip_rectangle(self, rectangle: Bbox | None) -> None: ...
+    def set_clip_path(self, path: TransformedPath | None) -> None: ...
+    def set_dashes(self, dash_offset: float, dash_list: ArrayLike | None) -> None: ...
+    def set_foreground(self, fg: ColorType, isRGBA: bool = ...) -> None: ...
+    def set_joinstyle(self, js: JoinStyleType) -> None: ...
+    def set_linewidth(self, w: float) -> None: ...
+    def set_url(self, url: str | None) -> None: ...
+    def set_gid(self, id: int | None) -> None: ...
+    def set_snap(self, snap: bool | None) -> None: ...
+    def set_hatch(self, hatch: str | None) -> None: ...
+    def get_hatch(self) -> str | None: ...
+    def get_hatch_path(self, density: float = ...) -> Path: ...
+    def get_hatch_color(self) -> ColorType: ...
+    def set_hatch_color(self, hatch_color: ColorType) -> None: ...
+    def get_hatch_linewidth(self) -> float: ...
+    def set_hatch_linewidth(self, hatch_linewidth: float) -> None: ...
+    def get_sketch_params(self) -> tuple[float, float, float] | None: ...
+    def set_sketch_params(
+        self,
+        scale: float | None = ...,
+        length: float | None = ...,
+        randomness: float | None = ...,
+    ) -> None: ...
+
+class TimerBase:
+    callbacks: list[tuple[Callable, tuple, dict[str, Any]]]
+    def __init__(
+        self,
+        interval: int | None = ...,
+        callbacks: list[tuple[Callable, tuple, dict[str, Any]]] | None = ...,
+    ) -> None: ...
+    def __del__(self) -> None: ...
+    def start(self, interval: int | None = ...) -> None: ...
+    def stop(self) -> None: ...
+    @property
+    def interval(self) -> int: ...
+    @interval.setter
+    def interval(self, interval: int) -> None: ...
+    @property
+    def single_shot(self) -> bool: ...
+    @single_shot.setter
+    def single_shot(self, ss: bool) -> None: ...
+    def add_callback(self, func: Callable, *args, **kwargs) -> Callable: ...
+    def remove_callback(self, func: Callable, *args, **kwargs) -> None: ...
+
+class Event:
+    name: str
+    canvas: FigureCanvasBase
+    guiEvent: Any
+    def __init__(
+        self, name: str, canvas: FigureCanvasBase, guiEvent: Any | None = ...
+    ) -> None: ...
+
+class DrawEvent(Event):
+    renderer: RendererBase
+    def __init__(
+        self, name: str, canvas: FigureCanvasBase, renderer: RendererBase
+    ) -> None: ...
+
+class ResizeEvent(Event):
+    width: int
+    height: int
+    def __init__(self, name: str, canvas: FigureCanvasBase) -> None: ...
+
+class CloseEvent(Event): ...
+
+class LocationEvent(Event):
+    x: int
+    y: int
+    inaxes: Axes | None
+    xdata: float | None
+    ydata: float | None
+    def __init__(
+        self,
+        name: str,
+        canvas: FigureCanvasBase,
+        x: int,
+        y: int,
+        guiEvent: Any | None = ...,
+        *,
+        modifiers: Iterable[str] | None = ...,
+    ) -> None: ...
+
+class MouseButton(IntEnum):
+    LEFT: int
+    MIDDLE: int
+    RIGHT: int
+    BACK: int
+    FORWARD: int
+
+class MouseEvent(LocationEvent):
+    button: MouseButton | Literal["up", "down"] | None
+    key: str | None
+    step: float
+    dblclick: bool
+    def __init__(
+        self,
+        name: str,
+        canvas: FigureCanvasBase,
+        x: int,
+        y: int,
+        button: MouseButton | Literal["up", "down"] | None = ...,
+        key: str | None = ...,
+        step: float = ...,
+        dblclick: bool = ...,
+        guiEvent: Any | None = ...,
+        *,
+        buttons: Iterable[MouseButton] | None = ...,
+        modifiers: Iterable[str] | None = ...,
+    ) -> None: ...
+
+class PickEvent(Event):
+    mouseevent: MouseEvent
+    artist: Artist
+    def __init__(
+        self,
+        name: str,
+        canvas: FigureCanvasBase,
+        mouseevent: MouseEvent,
+        artist: Artist,
+        guiEvent: Any | None = ...,
+        **kwargs
+    ) -> None: ...
+
+class KeyEvent(LocationEvent):
+    key: str | None
+    def __init__(
+        self,
+        name: str,
+        canvas: FigureCanvasBase,
+        key: str | None,
+        x: int = ...,
+        y: int = ...,
+        guiEvent: Any | None = ...,
+    ) -> None: ...
+
+class FigureCanvasBase:
+    required_interactive_framework: str | None
+
+    @_api.classproperty
+    def manager_class(cls) -> type[FigureManagerBase]: ...
+    events: list[str]
+    fixed_dpi: None | float
+    filetypes: dict[str, str]
+
+    @_api.classproperty
+    def supports_blit(cls) -> bool: ...
+
+    figure: Figure
+    manager: None | FigureManagerBase
+    widgetlock: widgets.LockDraw
+    mouse_grabber: None | Axes
+    toolbar: None | NavigationToolbar2
+    def __init__(self, figure: Figure | None = ...) -> None: ...
+    @property
+    def callbacks(self) -> cbook.CallbackRegistry: ...
+    @property
+    def button_pick_id(self) -> int: ...
+    @property
+    def scroll_pick_id(self) -> int: ...
+    @classmethod
+    def new_manager(cls, figure: Figure, num: int | str) -> FigureManagerBase: ...
+    def is_saving(self) -> bool: ...
+    def blit(self, bbox: BboxBase | None = ...) -> None: ...
+    def inaxes(self, xy: tuple[float, float]) -> Axes | None: ...
+    def grab_mouse(self, ax: Axes) -> None: ...
+    def release_mouse(self, ax: Axes) -> None: ...
+    def set_cursor(self, cursor: Cursors) -> None: ...
+    def draw(self, *args, **kwargs) -> None: ...
+    def draw_idle(self, *args, **kwargs) -> None: ...
+    @property
+    def device_pixel_ratio(self) -> float: ...
+    def get_width_height(self, *, physical: bool = ...) -> tuple[int, int]: ...
+    @classmethod
+    def get_supported_filetypes(cls) -> dict[str, str]: ...
+    @classmethod
+    def get_supported_filetypes_grouped(cls) -> dict[str, list[str]]: ...
+    def print_figure(
+        self,
+        filename: str | os.PathLike | IO,
+        dpi: float | None = ...,
+        facecolor: ColorType | Literal["auto"] | None = ...,
+        edgecolor: ColorType | Literal["auto"] | None = ...,
+        orientation: str = ...,
+        format: str | None = ...,
+        *,
+        bbox_inches: Literal["tight"] | Bbox | None = ...,
+        pad_inches: float | None = ...,
+        bbox_extra_artists: list[Artist] | None = ...,
+        backend: str | None = ...,
+        **kwargs
+    ) -> Any: ...
+    @classmethod
+    def get_default_filetype(cls) -> str: ...
+    def get_default_filename(self) -> str: ...
+    _T = TypeVar("_T", bound=FigureCanvasBase)
+    def mpl_connect(self, s: str, func: Callable[[Event], Any]) -> int: ...
+    def mpl_disconnect(self, cid: int) -> None: ...
+    def new_timer(
+        self,
+        interval: int | None = ...,
+        callbacks: list[tuple[Callable, tuple, dict[str, Any]]] | None = ...,
+    ) -> TimerBase: ...
+    def flush_events(self) -> None: ...
+    def start_event_loop(self, timeout: float = ...) -> None: ...
+    def stop_event_loop(self) -> None: ...
+
+def key_press_handler(
+    event: KeyEvent,
+    canvas: FigureCanvasBase | None = ...,
+    toolbar: NavigationToolbar2 | None = ...,
+) -> None: ...
+def button_press_handler(
+    event: MouseEvent,
+    canvas: FigureCanvasBase | None = ...,
+    toolbar: NavigationToolbar2 | None = ...,
+) -> None: ...
+
+class NonGuiException(Exception): ...
+
+class FigureManagerBase:
+    canvas: FigureCanvasBase
+    num: int | str
+    key_press_handler_id: int | None
+    button_press_handler_id: int | None
+    toolmanager: ToolManager | None
+    toolbar: NavigationToolbar2 | ToolContainerBase | None
+    def __init__(self, canvas: FigureCanvasBase, num: int | str) -> None: ...
+    @classmethod
+    def create_with_canvas(
+        cls, canvas_class: type[FigureCanvasBase], figure: Figure, num: int | str
+    ) -> FigureManagerBase: ...
+    @classmethod
+    def start_main_loop(cls) -> None: ...
+    @classmethod
+    def pyplot_show(cls, *, block: bool | None = ...) -> None: ...
+    def show(self) -> None: ...
+    def destroy(self) -> None: ...
+    def full_screen_toggle(self) -> None: ...
+    def resize(self, w: int, h: int) -> None: ...
+    def get_window_title(self) -> str: ...
+    def set_window_title(self, title: str) -> None: ...
+
+cursors = Cursors
+
+class _Mode(str, Enum):
+    NONE: str
+    PAN: str
+    ZOOM: str
+
+class NavigationToolbar2:
+    toolitems: tuple[tuple[str, ...] | tuple[None, ...], ...]
+    UNKNOWN_SAVED_STATUS: object
+    canvas: FigureCanvasBase
+    mode: _Mode
+    def __init__(self, canvas: FigureCanvasBase) -> None: ...
+    def set_message(self, s: str) -> None: ...
+    def draw_rubberband(
+        self, event: Event, x0: float, y0: float, x1: float, y1: float
+    ) -> None: ...
+    def remove_rubberband(self) -> None: ...
+    def home(self, *args) -> None: ...
+    def back(self, *args) -> None: ...
+    def forward(self, *args) -> None: ...
+    def mouse_move(self, event: MouseEvent) -> None: ...
+    def pan(self, *args) -> None: ...
+
+    class _PanInfo(NamedTuple):
+        button: MouseButton
+        axes: list[Axes]
+        cid: int
+    def press_pan(self, event: Event) -> None: ...
+    def drag_pan(self, event: Event) -> None: ...
+    def release_pan(self, event: Event) -> None: ...
+    def zoom(self, *args) -> None: ...
+
+    class _ZoomInfo(NamedTuple):
+        direction: Literal["in", "out"]
+        start_xy: tuple[float, float]
+        axes: list[Axes]
+        cid: int
+        cbar: Colorbar
+    def press_zoom(self, event: Event) -> None: ...
+    def drag_zoom(self, event: Event) -> None: ...
+    def release_zoom(self, event: Event) -> None: ...
+    def push_current(self) -> None: ...
+    subplot_tool: widgets.SubplotTool
+    def configure_subplots(self, *args): ...
+    def save_figure(self, *args) -> str | None | object: ...
+    def update(self) -> None: ...
+    def set_history_buttons(self) -> None: ...
+
+class ToolContainerBase:
+    toolmanager: ToolManager
+    def __init__(self, toolmanager: ToolManager) -> None: ...
+    def add_tool(self, tool: ToolBase, group: str, position: int = ...) -> None: ...
+    def trigger_tool(self, name: str) -> None: ...
+    def add_toolitem(
+        self,
+        name: str,
+        group: str,
+        position: int,
+        image: str,
+        description: str,
+        toggle: bool,
+    ) -> None: ...
+    def toggle_toolitem(self, name: str, toggled: bool) -> None: ...
+    def remove_toolitem(self, name: str) -> None: ...
+    def set_message(self, s: str) -> None: ...
+
+class _Backend:
+    backend_version: str
+    FigureCanvas: type[FigureCanvasBase] | None
+    FigureManager: type[FigureManagerBase]
+    mainloop: None | Callable[[], Any]
+    @classmethod
+    def new_figure_manager(cls, num: int | str, *args, **kwargs) -> FigureManagerBase: ...
+    @classmethod
+    def new_figure_manager_given_figure(cls, num: int | str, figure: Figure) -> FigureManagerBase: ...
+    @classmethod
+    def draw_if_interactive(cls) -> None: ...
+    @classmethod
+    def show(cls, *, block: bool | None = ...) -> None: ...
+    @staticmethod
+    def export(cls) -> type[_Backend]: ...
+
+class ShowBase(_Backend):
+    def __call__(self, block: bool | None = ...) -> None: ...

moondream/lib/python3.10/site-packages/matplotlib/backend_managers.py

@@ -0,0 +1,387 @@
+from matplotlib import _api, backend_tools, cbook, widgets
+
+
+class ToolEvent:
+    """Event for tool manipulation (add/remove)."""
+    def __init__(self, name, sender, tool, data=None):
+        self.name = name
+        self.sender = sender
+        self.tool = tool
+        self.data = data
+
+
+class ToolTriggerEvent(ToolEvent):
+    """Event to inform that a tool has been triggered."""
+    def __init__(self, name, sender, tool, canvasevent=None, data=None):
+        super().__init__(name, sender, tool, data)
+        self.canvasevent = canvasevent
+
+
+class ToolManagerMessageEvent:
+    """
+    Event carrying messages from toolmanager.
+
+    Messages usually get displayed to the user by the toolbar.
+    """
+    def __init__(self, name, sender, message):
+        self.name = name
+        self.sender = sender
+        self.message = message
+
+
+class ToolManager:
+    """
+    Manager for actions triggered by user interactions (key press, toolbar
+    clicks, ...) on a Figure.
+
+    Attributes
+    ----------
+    figure : `.Figure`
+    keypresslock : `~matplotlib.widgets.LockDraw`
+        `.LockDraw` object to know if the `canvas` key_press_event is locked.
+    messagelock : `~matplotlib.widgets.LockDraw`
+        `.LockDraw` object to know if the message is available to write.
+    """
+
+    def __init__(self, figure=None):
+
+        self._key_press_handler_id = None
+
+        self._tools = {}
+        self._keys = {}
+        self._toggled = {}
+        self._callbacks = cbook.CallbackRegistry()
+
+        # to process keypress event
+        self.keypresslock = widgets.LockDraw()
+        self.messagelock = widgets.LockDraw()
+
+        self._figure = None
+        self.set_figure(figure)
+
+    @property
+    def canvas(self):
+        """Canvas managed by FigureManager."""
+        if not self._figure:
+            return None
+        return self._figure.canvas
+
+    @property
+    def figure(self):
+        """Figure that holds the canvas."""
+        return self._figure
+
+    @figure.setter
+    def figure(self, figure):
+        self.set_figure(figure)
+
+    def set_figure(self, figure, update_tools=True):
+        """
+        Bind the given figure to the tools.
+
+        Parameters
+        ----------
+        figure : `.Figure`
+        update_tools : bool, default: True
+            Force tools to update figure.
+        """
+        if self._key_press_handler_id:
+            self.canvas.mpl_disconnect(self._key_press_handler_id)
+        self._figure = figure
+        if figure:
+            self._key_press_handler_id = self.canvas.mpl_connect(
+                'key_press_event', self._key_press)
+        if update_tools:
+            for tool in self._tools.values():
+                tool.figure = figure
+
+    def toolmanager_connect(self, s, func):
+        """
+        Connect event with string *s* to *func*.
+
+        Parameters
+        ----------
+        s : str
+            The name of the event. The following events are recognized:
+
+            - 'tool_message_event'
+            - 'tool_removed_event'
+            - 'tool_added_event'
+
+            For every tool added a new event is created
+
+            - 'tool_trigger_TOOLNAME', where TOOLNAME is the id of the tool.
+
+        func : callable
+            Callback function for the toolmanager event with signature::
+
+                def func(event: ToolEvent) -> Any
+
+        Returns
+        -------
+        cid
+            The callback id for the connection. This can be used in
+            `.toolmanager_disconnect`.
+        """
+        return self._callbacks.connect(s, func)
+
+    def toolmanager_disconnect(self, cid):
+        """
+        Disconnect callback id *cid*.
+
+        Example usage::
+
+            cid = toolmanager.toolmanager_connect('tool_trigger_zoom', onpress)
+            #...later
+            toolmanager.toolmanager_disconnect(cid)
+        """
+        return self._callbacks.disconnect(cid)
+
+    def message_event(self, message, sender=None):
+        """Emit a `ToolManagerMessageEvent`."""
+        if sender is None:
+            sender = self
+
+        s = 'tool_message_event'
+        event = ToolManagerMessageEvent(s, sender, message)
+        self._callbacks.process(s, event)
+
+    @property
+    def active_toggle(self):
+        """Currently toggled tools."""
+        return self._toggled
+
+    def get_tool_keymap(self, name):
+        """
+        Return the keymap associated with the specified tool.
+
+        Parameters
+        ----------
+        name : str
+            Name of the Tool.
+
+        Returns
+        -------
+        list of str
+            List of keys associated with the tool.
+        """
+
+        keys = [k for k, i in self._keys.items() if i == name]
+        return keys
+
+    def _remove_keys(self, name):
+        for k in self.get_tool_keymap(name):
+            del self._keys[k]
+
+    def update_keymap(self, name, key):
+        """
+        Set the keymap to associate with the specified tool.
+
+        Parameters
+        ----------
+        name : str
+            Name of the Tool.
+        key : str or list of str
+            Keys to associate with the tool.
+        """
+        if name not in self._tools:
+            raise KeyError(f'{name!r} not in Tools')
+        self._remove_keys(name)
+        if isinstance(key, str):
+            key = [key]
+        for k in key:
+            if k in self._keys:
+                _api.warn_external(
+                    f'Key {k} changed from {self._keys[k]} to {name}')
+            self._keys[k] = name
+
+    def remove_tool(self, name):
+        """
+        Remove tool named *name*.
+
+        Parameters
+        ----------
+        name : str
+            Name of the tool.
+        """
+        tool = self.get_tool(name)
+        if getattr(tool, 'toggled', False):  # If it's a toggled toggle tool, untoggle
+            self.trigger_tool(tool, 'toolmanager')
+        self._remove_keys(name)
+        event = ToolEvent('tool_removed_event', self, tool)
+        self._callbacks.process(event.name, event)
+        del self._tools[name]
+
+    def add_tool(self, name, tool, *args, **kwargs):
+        """
+        Add *tool* to `ToolManager`.
+
+        If successful, adds a new event ``tool_trigger_{name}`` where
+        ``{name}`` is the *name* of the tool; the event is fired every time the
+        tool is triggered.
+
+        Parameters
+        ----------
+        name : str
+            Name of the tool, treated as the ID, has to be unique.
+        tool : type
+            Class of the tool to be added.  A subclass will be used
+            instead if one was registered for the current canvas class.
+        *args, **kwargs
+            Passed to the *tool*'s constructor.
+
+        See Also
+        --------
+        matplotlib.backend_tools.ToolBase : The base class for tools.
+        """
+
+        tool_cls = backend_tools._find_tool_class(type(self.canvas), tool)
+        if not tool_cls:
+            raise ValueError('Impossible to find class for %s' % str(tool))
+
+        if name in self._tools:
+            _api.warn_external('A "Tool class" with the same name already '
+                               'exists, not added')
+            return self._tools[name]
+
+        tool_obj = tool_cls(self, name, *args, **kwargs)
+        self._tools[name] = tool_obj
+
+        if tool_obj.default_keymap is not None:
+            self.update_keymap(name, tool_obj.default_keymap)
+
+        # For toggle tools init the radio_group in self._toggled
+        if isinstance(tool_obj, backend_tools.ToolToggleBase):
+            # None group is not mutually exclusive, a set is used to keep track
+            # of all toggled tools in this group
+            if tool_obj.radio_group is None:
+                self._toggled.setdefault(None, set())
+            else:
+                self._toggled.setdefault(tool_obj.radio_group, None)
+
+            # If initially toggled
+            if tool_obj.toggled:
+                self._handle_toggle(tool_obj, None, None)
+        tool_obj.set_figure(self.figure)
+
+        event = ToolEvent('tool_added_event', self, tool_obj)
+        self._callbacks.process(event.name, event)
+
+        return tool_obj
+
+    def _handle_toggle(self, tool, canvasevent, data):
+        """
+        Toggle tools, need to untoggle prior to using other Toggle tool.
+        Called from trigger_tool.
+
+        Parameters
+        ----------
+        tool : `.ToolBase`
+        canvasevent : Event
+            Original Canvas event or None.
+        data : object
+            Extra data to pass to the tool when triggering.
+        """
+
+        radio_group = tool.radio_group
+        # radio_group None is not mutually exclusive
+        # just keep track of toggled tools in this group
+        if radio_group is None:
+            if tool.name in self._toggled[None]:
+                self._toggled[None].remove(tool.name)
+            else:
+                self._toggled[None].add(tool.name)
+            return
+
+        # If the tool already has a toggled state, untoggle it
+        if self._toggled[radio_group] == tool.name:
+            toggled = None
+        # If no tool was toggled in the radio_group
+        # toggle it
+        elif self._toggled[radio_group] is None:
+            toggled = tool.name
+        # Other tool in the radio_group is toggled
+        else:
+            # Untoggle previously toggled tool
+            self.trigger_tool(self._toggled[radio_group],
+                              self,
+                              canvasevent,
+                              data)
+            toggled = tool.name
+
+        # Keep track of the toggled tool in the radio_group
+        self._toggled[radio_group] = toggled
+
+    def trigger_tool(self, name, sender=None, canvasevent=None, data=None):
+        """
+        Trigger a tool and emit the ``tool_trigger_{name}`` event.
+
+        Parameters
+        ----------
+        name : str
+            Name of the tool.
+        sender : object
+            Object that wishes to trigger the tool.
+        canvasevent : Event
+            Original Canvas event or None.
+        data : object
+            Extra data to pass to the tool when triggering.
+        """
+        tool = self.get_tool(name)
+        if tool is None:
+            return
+
+        if sender is None:
+            sender = self
+
+        if isinstance(tool, backend_tools.ToolToggleBase):
+            self._handle_toggle(tool, canvasevent, data)
+
+        tool.trigger(sender, canvasevent, data)  # Actually trigger Tool.
+
+        s = 'tool_trigger_%s' % name
+        event = ToolTriggerEvent(s, sender, tool, canvasevent, data)
+        self._callbacks.process(s, event)
+
+    def _key_press(self, event):
+        if event.key is None or self.keypresslock.locked():
+            return
+
+        name = self._keys.get(event.key, None)
+        if name is None:
+            return
+        self.trigger_tool(name, canvasevent=event)
+
+    @property
+    def tools(self):
+        """A dict mapping tool name -> controlled tool."""
+        return self._tools
+
+    def get_tool(self, name, warn=True):
+        """
+        Return the tool object with the given name.
+
+        For convenience, this passes tool objects through.
+
+        Parameters
+        ----------
+        name : str or `.ToolBase`
+            Name of the tool, or the tool itself.
+        warn : bool, default: True
+            Whether a warning should be emitted it no tool with the given name
+            exists.
+
+        Returns
+        -------
+        `.ToolBase` or None
+            The tool or None if no tool with the given name exists.
+        """
+        if (isinstance(name, backend_tools.ToolBase)
+                and name.name in self._tools):
+            return name
+        if name not in self._tools:
+            if warn:
+                _api.warn_external(
+                    f"ToolManager does not control tool {name!r}")
+            return None
+        return self._tools[name]

moondream/lib/python3.10/site-packages/matplotlib/backend_tools.pyi

@@ -0,0 +1,121 @@
+import enum
+from matplotlib import cbook
+from matplotlib.axes import Axes
+from matplotlib.backend_bases import ToolContainerBase, FigureCanvasBase
+from matplotlib.backend_managers import ToolManager, ToolEvent
+from matplotlib.figure import Figure
+from matplotlib.scale import ScaleBase
+
+from typing import Any
+
+class Cursors(enum.IntEnum):
+    POINTER: int
+    HAND: int
+    SELECT_REGION: int
+    MOVE: int
+    WAIT: int
+    RESIZE_HORIZONTAL: int
+    RESIZE_VERTICAL: int
+
+cursors = Cursors
+
+class ToolBase:
+    @property
+    def default_keymap(self) -> list[str] | None: ...
+    description: str | None
+    image: str | None
+    def __init__(self, toolmanager: ToolManager, name: str) -> None: ...
+    @property
+    def name(self) -> str: ...
+    @property
+    def toolmanager(self) -> ToolManager: ...
+    @property
+    def canvas(self) -> FigureCanvasBase | None: ...
+    @property
+    def figure(self) -> Figure | None: ...
+    @figure.setter
+    def figure(self, figure: Figure | None) -> None: ...
+    def set_figure(self, figure: Figure | None) -> None: ...
+    def trigger(self, sender: Any, event: ToolEvent, data: Any = ...) -> None: ...
+
+class ToolToggleBase(ToolBase):
+    radio_group: str | None
+    cursor: Cursors | None
+    default_toggled: bool
+    def __init__(self, *args, **kwargs) -> None: ...
+    def enable(self, event: ToolEvent | None = ...) -> None: ...
+    def disable(self, event: ToolEvent | None = ...) -> None: ...
+    @property
+    def toggled(self) -> bool: ...
+    def set_figure(self, figure: Figure | None) -> None: ...
+
+class ToolSetCursor(ToolBase): ...
+
+class ToolCursorPosition(ToolBase):
+    def send_message(self, event: ToolEvent) -> None: ...
+
+class RubberbandBase(ToolBase):
+    def draw_rubberband(self, *data) -> None: ...
+    def remove_rubberband(self) -> None: ...
+
+class ToolQuit(ToolBase): ...
+class ToolQuitAll(ToolBase): ...
+class ToolGrid(ToolBase): ...
+class ToolMinorGrid(ToolBase): ...
+class ToolFullScreen(ToolBase): ...
+
+class AxisScaleBase(ToolToggleBase):
+    def enable(self, event: ToolEvent | None = ...) -> None: ...
+    def disable(self, event: ToolEvent | None = ...) -> None: ...
+
+class ToolYScale(AxisScaleBase):
+    def set_scale(self, ax: Axes, scale: str | ScaleBase) -> None: ...
+
+class ToolXScale(AxisScaleBase):
+    def set_scale(self, ax, scale: str | ScaleBase) -> None: ...
+
+class ToolViewsPositions(ToolBase):
+    views: dict[Figure | Axes, cbook._Stack]
+    positions: dict[Figure | Axes, cbook._Stack]
+    home_views: dict[Figure, dict[Axes, tuple[float, float, float, float]]]
+    def add_figure(self, figure: Figure) -> None: ...
+    def clear(self, figure: Figure) -> None: ...
+    def update_view(self) -> None: ...
+    def push_current(self, figure: Figure | None = ...) -> None: ...
+    def update_home_views(self, figure: Figure | None = ...) -> None: ...
+    def home(self) -> None: ...
+    def back(self) -> None: ...
+    def forward(self) -> None: ...
+
+class ViewsPositionsBase(ToolBase): ...
+class ToolHome(ViewsPositionsBase): ...
+class ToolBack(ViewsPositionsBase): ...
+class ToolForward(ViewsPositionsBase): ...
+class ConfigureSubplotsBase(ToolBase): ...
+class SaveFigureBase(ToolBase): ...
+
+class ZoomPanBase(ToolToggleBase):
+    base_scale: float
+    scrollthresh: float
+    lastscroll: float
+    def __init__(self, *args) -> None: ...
+    def enable(self, event: ToolEvent | None = ...) -> None: ...
+    def disable(self, event: ToolEvent | None = ...) -> None: ...
+    def scroll_zoom(self, event: ToolEvent) -> None: ...
+
+class ToolZoom(ZoomPanBase): ...
+class ToolPan(ZoomPanBase): ...
+
+class ToolHelpBase(ToolBase):
+    @staticmethod
+    def format_shortcut(key_sequence: str) -> str: ...
+
+class ToolCopyToClipboardBase(ToolBase): ...
+
+default_tools: dict[str, ToolBase]
+default_toolbar_tools: list[list[str | list[str]]]
+
+def add_tools_to_manager(
+    toolmanager: ToolManager, tools: dict[str, type[ToolBase]] = ...
+) -> None: ...
+def add_tools_to_container(container: ToolContainerBase, tools: list[Any] = ...) -> None: ...

moondream/lib/python3.10/site-packages/matplotlib/bezier.pyi

@@ -0,0 +1,74 @@
+from collections.abc import Callable
+from typing import Literal
+
+import numpy as np
+from numpy.typing import ArrayLike
+
+from .path import Path
+
+class NonIntersectingPathException(ValueError): ...
+
+def get_intersection(
+    cx1: float,
+    cy1: float,
+    cos_t1: float,
+    sin_t1: float,
+    cx2: float,
+    cy2: float,
+    cos_t2: float,
+    sin_t2: float,
+) -> tuple[float, float]: ...
+def get_normal_points(
+    cx: float, cy: float, cos_t: float, sin_t: float, length: float
+) -> tuple[float, float, float, float]: ...
+def split_de_casteljau(beta: ArrayLike, t: float) -> tuple[np.ndarray, np.ndarray]: ...
+def find_bezier_t_intersecting_with_closedpath(
+    bezier_point_at_t: Callable[[float], tuple[float, float]],
+    inside_closedpath: Callable[[tuple[float, float]], bool],
+    t0: float = ...,
+    t1: float = ...,
+    tolerance: float = ...,
+) -> tuple[float, float]: ...
+
+# TODO make generic over d, the dimension? ndarraydim
+class BezierSegment:
+    def __init__(self, control_points: ArrayLike) -> None: ...
+    def __call__(self, t: ArrayLike) -> np.ndarray: ...
+    def point_at_t(self, t: float) -> tuple[float, ...]: ...
+    @property
+    def control_points(self) -> np.ndarray: ...
+    @property
+    def dimension(self) -> int: ...
+    @property
+    def degree(self) -> int: ...
+    @property
+    def polynomial_coefficients(self) -> np.ndarray: ...
+    def axis_aligned_extrema(self) -> tuple[np.ndarray, np.ndarray]: ...
+
+def split_bezier_intersecting_with_closedpath(
+    bezier: ArrayLike,
+    inside_closedpath: Callable[[tuple[float, float]], bool],
+    tolerance: float = ...,
+) -> tuple[np.ndarray, np.ndarray]: ...
+def split_path_inout(
+    path: Path,
+    inside: Callable[[tuple[float, float]], bool],
+    tolerance: float = ...,
+    reorder_inout: bool = ...,
+) -> tuple[Path, Path]: ...
+def inside_circle(
+    cx: float, cy: float, r: float
+) -> Callable[[tuple[float, float]], bool]: ...
+def get_cos_sin(x0: float, y0: float, x1: float, y1: float) -> tuple[float, float]: ...
+def check_if_parallel(
+    dx1: float, dy1: float, dx2: float, dy2: float, tolerance: float = ...
+) -> Literal[-1, False, 1]: ...
+def get_parallels(
+    bezier2: ArrayLike, width: float
+) -> tuple[list[tuple[float, float]], list[tuple[float, float]]]: ...
+def find_control_points(
+    c1x: float, c1y: float, mmx: float, mmy: float, c2x: float, c2y: float
+) -> list[tuple[float, float]]: ...
+def make_wedged_bezier2(
+    bezier2: ArrayLike, width: float, w1: float = ..., wm: float = ..., w2: float = ...
+) -> tuple[list[tuple[float, float]], list[tuple[float, float]]]: ...

moondream/lib/python3.10/site-packages/matplotlib/colorbar.pyi

@@ -0,0 +1,139 @@
+import matplotlib.spines as mspines
+from matplotlib import cm, collections, colors, contour, colorizer
+from matplotlib.axes import Axes
+from matplotlib.axis import Axis
+from matplotlib.backend_bases import RendererBase
+from matplotlib.patches import Patch
+from matplotlib.ticker import Locator, Formatter
+from matplotlib.transforms import Bbox
+
+import numpy as np
+from numpy.typing import ArrayLike
+from collections.abc import Sequence
+from typing import Any, Literal, overload
+from .typing import ColorType
+
+class _ColorbarSpine(mspines.Spines):
+    def __init__(self, axes: Axes): ...
+    def get_window_extent(self, renderer: RendererBase | None = ...) -> Bbox:...
+    def set_xy(self, xy: ArrayLike) -> None: ...
+    def draw(self, renderer: RendererBase | None) -> None:...
+
+
+class Colorbar:
+    n_rasterize: int
+    mappable: cm.ScalarMappable | colorizer.ColorizingArtist
+    ax: Axes
+    alpha: float | None
+    cmap: colors.Colormap
+    norm: colors.Normalize
+    values: Sequence[float] | None
+    boundaries: Sequence[float] | None
+    extend: Literal["neither", "both", "min", "max"]
+    spacing: Literal["uniform", "proportional"]
+    orientation: Literal["vertical", "horizontal"]
+    drawedges: bool
+    extendfrac: Literal["auto"] | float | Sequence[float] | None
+    extendrect: bool
+    solids: None | collections.QuadMesh
+    solids_patches: list[Patch]
+    lines: list[collections.LineCollection]
+    outline: _ColorbarSpine
+    dividers: collections.LineCollection
+    ticklocation: Literal["left", "right", "top", "bottom"]
+    def __init__(
+        self,
+        ax: Axes,
+        mappable: cm.ScalarMappable | colorizer.ColorizingArtist | None = ...,
+        *,
+        cmap: str | colors.Colormap | None = ...,
+        norm: colors.Normalize | None = ...,
+        alpha: float | None = ...,
+        values: Sequence[float] | None = ...,
+        boundaries: Sequence[float] | None = ...,
+        orientation: Literal["vertical", "horizontal"] | None = ...,
+        ticklocation: Literal["auto", "left", "right", "top", "bottom"] = ...,
+        extend: Literal["neither", "both", "min", "max"] | None = ...,
+        spacing: Literal["uniform", "proportional"] = ...,
+        ticks: Sequence[float] | Locator | None = ...,
+        format: str | Formatter | None = ...,
+        drawedges: bool = ...,
+        extendfrac: Literal["auto"] | float | Sequence[float] | None = ...,
+        extendrect: bool = ...,
+        label: str = ...,
+        location: Literal["left", "right", "top", "bottom"] | None = ...
+    ) -> None: ...
+    @property
+    def long_axis(self) -> Axis: ...
+    @property
+    def locator(self) -> Locator: ...
+    @locator.setter
+    def locator(self, loc: Locator) -> None: ...
+    @property
+    def minorlocator(self) -> Locator: ...
+    @minorlocator.setter
+    def minorlocator(self, loc: Locator) -> None: ...
+    @property
+    def formatter(self) -> Formatter: ...
+    @formatter.setter
+    def formatter(self, fmt: Formatter) -> None: ...
+    @property
+    def minorformatter(self) -> Formatter: ...
+    @minorformatter.setter
+    def minorformatter(self, fmt: Formatter) -> None: ...
+    def update_normal(self, mappable: cm.ScalarMappable | None = ...) -> None: ...
+    @overload
+    def add_lines(self, CS: contour.ContourSet, erase: bool = ...) -> None: ...
+    @overload
+    def add_lines(
+        self,
+        levels: ArrayLike,
+        colors: ColorType | Sequence[ColorType],
+        linewidths: float | ArrayLike,
+        erase: bool = ...,
+    ) -> None: ...
+    def update_ticks(self) -> None: ...
+    def set_ticks(
+        self,
+        ticks: Sequence[float] | Locator,
+        *,
+        labels: Sequence[str] | None = ...,
+        minor: bool = ...,
+        **kwargs
+    ) -> None: ...
+    def get_ticks(self, minor: bool = ...) -> np.ndarray: ...
+    def set_ticklabels(
+        self,
+        ticklabels: Sequence[str],
+        *,
+        minor: bool = ...,
+        **kwargs
+    ) -> None: ...
+    def minorticks_on(self) -> None: ...
+    def minorticks_off(self) -> None: ...
+    def set_label(self, label: str, *, loc: str | None = ..., **kwargs) -> None: ...
+    def set_alpha(self, alpha: float | np.ndarray) -> None: ...
+    def remove(self) -> None: ...
+    def drag_pan(self, button: Any, key: Any, x: float, y: float) -> None: ...
+
+ColorbarBase = Colorbar
+
+def make_axes(
+    parents: Axes | list[Axes] | np.ndarray,
+    location: Literal["left", "right", "top", "bottom"] | None = ...,
+    orientation: Literal["vertical", "horizontal"] | None = ...,
+    fraction: float = ...,
+    shrink: float = ...,
+    aspect: float = ...,
+    **kwargs
+) -> tuple[Axes, dict[str, Any]]: ...
+def make_axes_gridspec(
+    parent: Axes,
+    *,
+    location: Literal["left", "right", "top", "bottom"] | None = ...,
+    orientation: Literal["vertical", "horizontal"] | None = ...,
+    fraction: float = ...,
+    shrink: float = ...,
+    aspect: float = ...,
+    **kwargs
+) -> tuple[Axes, dict[str, Any]]: ...

moondream/lib/python3.10/site-packages/matplotlib/contour.py

@@ -0,0 +1,1709 @@
+"""
+Classes to support contour plotting and labelling for the Axes class.
+"""
+
+from contextlib import ExitStack
+import functools
+import math
+from numbers import Integral
+
+import numpy as np
+from numpy import ma
+
+import matplotlib as mpl
+from matplotlib import _api, _docstring
+from matplotlib.backend_bases import MouseButton
+from matplotlib.lines import Line2D
+from matplotlib.path import Path
+from matplotlib.text import Text
+import matplotlib.ticker as ticker
+import matplotlib.cm as cm
+import matplotlib.colors as mcolors
+import matplotlib.collections as mcoll
+import matplotlib.font_manager as font_manager
+import matplotlib.cbook as cbook
+import matplotlib.patches as mpatches
+import matplotlib.transforms as mtransforms
+
+
+def _contour_labeler_event_handler(cs, inline, inline_spacing, event):
+    canvas = cs.axes.get_figure(root=True).canvas
+    is_button = event.name == "button_press_event"
+    is_key = event.name == "key_press_event"
+    # Quit (even if not in infinite mode; this is consistent with
+    # MATLAB and sometimes quite useful, but will require the user to
+    # test how many points were actually returned before using data).
+    if (is_button and event.button == MouseButton.MIDDLE
+            or is_key and event.key in ["escape", "enter"]):
+        canvas.stop_event_loop()
+    # Pop last click.
+    elif (is_button and event.button == MouseButton.RIGHT
+          or is_key and event.key in ["backspace", "delete"]):
+        # Unfortunately, if one is doing inline labels, then there is currently
+        # no way to fix the broken contour - once humpty-dumpty is broken, he
+        # can't be put back together.  In inline mode, this does nothing.
+        if not inline:
+            cs.pop_label()
+            canvas.draw()
+    # Add new click.
+    elif (is_button and event.button == MouseButton.LEFT
+          # On macOS/gtk, some keys return None.
+          or is_key and event.key is not None):
+        if cs.axes.contains(event)[0]:
+            cs.add_label_near(event.x, event.y, transform=False,
+                              inline=inline, inline_spacing=inline_spacing)
+            canvas.draw()
+
+
+class ContourLabeler:
+    """Mixin to provide labelling capability to `.ContourSet`."""
+
+    def clabel(self, levels=None, *,
+               fontsize=None, inline=True, inline_spacing=5, fmt=None,
+               colors=None, use_clabeltext=False, manual=False,
+               rightside_up=True, zorder=None):
+        """
+        Label a contour plot.
+
+        Adds labels to line contours in this `.ContourSet` (which inherits from
+        this mixin class).
+
+        Parameters
+        ----------
+        levels : array-like, optional
+            A list of level values, that should be labeled. The list must be
+            a subset of ``cs.levels``. If not given, all levels are labeled.
+
+        fontsize : str or float, default: :rc:`font.size`
+            Size in points or relative size e.g., 'smaller', 'x-large'.
+            See `.Text.set_size` for accepted string values.
+
+        colors : :mpltype:`color` or colors or None, default: None
+            The label colors:
+
+            - If *None*, the color of each label matches the color of
+              the corresponding contour.
+
+            - If one string color, e.g., *colors* = 'r' or *colors* =
+              'red', all labels will be plotted in this color.
+
+            - If a tuple of colors (string, float, RGB, etc), different labels
+              will be plotted in different colors in the order specified.
+
+        inline : bool, default: True
+            If ``True`` the underlying contour is removed where the label is
+            placed.
+
+        inline_spacing : float, default: 5
+            Space in pixels to leave on each side of label when placing inline.
+
+            This spacing will be exact for labels at locations where the
+            contour is straight, less so for labels on curved contours.
+
+        fmt : `.Formatter` or str or callable or dict, optional
+            How the levels are formatted:
+
+            - If a `.Formatter`, it is used to format all levels at once, using
+              its `.Formatter.format_ticks` method.
+            - If a str, it is interpreted as a %-style format string.
+            - If a callable, it is called with one level at a time and should
+              return the corresponding label.
+            - If a dict, it should directly map levels to labels.
+
+            The default is to use a standard `.ScalarFormatter`.
+
+        manual : bool or iterable, default: False
+            If ``True``, contour labels will be placed manually using
+            mouse clicks. Click the first button near a contour to
+            add a label, click the second button (or potentially both
+            mouse buttons at once) to finish adding labels. The third
+            button can be used to remove the last label added, but
+            only if labels are not inline. Alternatively, the keyboard
+            can be used to select label locations (enter to end label
+            placement, delete or backspace act like the third mouse button,
+            and any other key will select a label location).
+
+            *manual* can also be an iterable object of (x, y) tuples.
+            Contour labels will be created as if mouse is clicked at each
+            (x, y) position.
+
+        rightside_up : bool, default: True
+            If ``True``, label rotations will always be plus
+            or minus 90 degrees from level.
+
+        use_clabeltext : bool, default: False
+            If ``True``, use `.Text.set_transform_rotates_text` to ensure that
+            label rotation is updated whenever the Axes aspect changes.
+
+        zorder : float or None, default: ``(2 + contour.get_zorder())``
+            zorder of the contour labels.
+
+        Returns
+        -------
+        labels
+            A list of `.Text` instances for the labels.
+        """
+
+        # Based on the input arguments, clabel() adds a list of "label
+        # specific" attributes to the ContourSet object.  These attributes are
+        # all of the form label* and names should be fairly self explanatory.
+        #
+        # Once these attributes are set, clabel passes control to the labels()
+        # method (for automatic label placement) or blocking_input_loop and
+        # _contour_labeler_event_handler (for manual label placement).
+
+        if fmt is None:
+            fmt = ticker.ScalarFormatter(useOffset=False)
+            fmt.create_dummy_axis()
+        self.labelFmt = fmt
+        self._use_clabeltext = use_clabeltext
+        self.labelManual = manual
+        self.rightside_up = rightside_up
+        self._clabel_zorder = 2 + self.get_zorder() if zorder is None else zorder
+
+        if levels is None:
+            levels = self.levels
+            indices = list(range(len(self.cvalues)))
+        else:
+            levlabs = list(levels)
+            indices, levels = [], []
+            for i, lev in enumerate(self.levels):
+                if lev in levlabs:
+                    indices.append(i)
+                    levels.append(lev)
+            if len(levels) < len(levlabs):
+                raise ValueError(f"Specified levels {levlabs} don't match "
+                                 f"available levels {self.levels}")
+        self.labelLevelList = levels
+        self.labelIndiceList = indices
+
+        self._label_font_props = font_manager.FontProperties(size=fontsize)
+
+        if colors is None:
+            self.labelMappable = self
+            self.labelCValueList = np.take(self.cvalues, self.labelIndiceList)
+        else:
+            cmap = mcolors.ListedColormap(colors, N=len(self.labelLevelList))
+            self.labelCValueList = list(range(len(self.labelLevelList)))
+            self.labelMappable = cm.ScalarMappable(cmap=cmap,
+                                                   norm=mcolors.NoNorm())
+
+        self.labelXYs = []
+
+        if np.iterable(manual):
+            for x, y in manual:
+                self.add_label_near(x, y, inline, inline_spacing)
+        elif manual:
+            print('Select label locations manually using first mouse button.')
+            print('End manual selection with second mouse button.')
+            if not inline:
+                print('Remove last label by clicking third mouse button.')
+            mpl._blocking_input.blocking_input_loop(
+                self.axes.get_figure(root=True),
+                ["button_press_event", "key_press_event"],
+                timeout=-1, handler=functools.partial(
+                    _contour_labeler_event_handler,
+                    self, inline, inline_spacing))
+        else:
+            self.labels(inline, inline_spacing)
+
+        return cbook.silent_list('text.Text', self.labelTexts)
+
+    def print_label(self, linecontour, labelwidth):
+        """Return whether a contour is long enough to hold a label."""
+        return (len(linecontour) > 10 * labelwidth
+                or (len(linecontour)
+                    and (np.ptp(linecontour, axis=0) > 1.2 * labelwidth).any()))
+
+    def too_close(self, x, y, lw):
+        """Return whether a label is already near this location."""
+        thresh = (1.2 * lw) ** 2
+        return any((x - loc[0]) ** 2 + (y - loc[1]) ** 2 < thresh
+                   for loc in self.labelXYs)
+
+    def _get_nth_label_width(self, nth):
+        """Return the width of the *nth* label, in pixels."""
+        fig = self.axes.get_figure(root=False)
+        renderer = fig.get_figure(root=True)._get_renderer()
+        return (Text(0, 0,
+                     self.get_text(self.labelLevelList[nth], self.labelFmt),
+                     figure=fig, fontproperties=self._label_font_props)
+                .get_window_extent(renderer).width)
+
+    def get_text(self, lev, fmt):
+        """Get the text of the label."""
+        if isinstance(lev, str):
+            return lev
+        elif isinstance(fmt, dict):
+            return fmt.get(lev, '%1.3f')
+        elif callable(getattr(fmt, "format_ticks", None)):
+            return fmt.format_ticks([*self.labelLevelList, lev])[-1]
+        elif callable(fmt):
+            return fmt(lev)
+        else:
+            return fmt % lev
+
+    def locate_label(self, linecontour, labelwidth):
+        """
+        Find good place to draw a label (relatively flat part of the contour).
+        """
+        ctr_size = len(linecontour)
+        n_blocks = int(np.ceil(ctr_size / labelwidth)) if labelwidth > 1 else 1
+        block_size = ctr_size if n_blocks == 1 else int(labelwidth)
+        # Split contour into blocks of length ``block_size``, filling the last
+        # block by cycling the contour start (per `np.resize` semantics).  (Due
+        # to cycling, the index returned is taken modulo ctr_size.)
+        xx = np.resize(linecontour[:, 0], (n_blocks, block_size))
+        yy = np.resize(linecontour[:, 1], (n_blocks, block_size))
+        yfirst = yy[:, :1]
+        ylast = yy[:, -1:]
+        xfirst = xx[:, :1]
+        xlast = xx[:, -1:]
+        s = (yfirst - yy) * (xlast - xfirst) - (xfirst - xx) * (ylast - yfirst)
+        l = np.hypot(xlast - xfirst, ylast - yfirst)
+        # Ignore warning that divide by zero throws, as this is a valid option
+        with np.errstate(divide='ignore', invalid='ignore'):
+            distances = (abs(s) / l).sum(axis=-1)
+        # Labels are drawn in the middle of the block (``hbsize``) where the
+        # contour is the closest (per ``distances``) to a straight line, but
+        # not `too_close()` to a preexisting label.
+        hbsize = block_size // 2
+        adist = np.argsort(distances)
+        # If all candidates are `too_close()`, go back to the straightest part
+        # (``adist[0]``).
+        for idx in np.append(adist, adist[0]):
+            x, y = xx[idx, hbsize], yy[idx, hbsize]
+            if not self.too_close(x, y, labelwidth):
+                break
+        return x, y, (idx * block_size + hbsize) % ctr_size
+
+    def _split_path_and_get_label_rotation(self, path, idx, screen_pos, lw, spacing=5):
+        """
+        Prepare for insertion of a label at index *idx* of *path*.
+
+        Parameters
+        ----------
+        path : Path
+            The path where the label will be inserted, in data space.
+        idx : int
+            The vertex index after which the label will be inserted.
+        screen_pos : (float, float)
+            The position where the label will be inserted, in screen space.
+        lw : float
+            The label width, in screen space.
+        spacing : float
+            Extra spacing around the label, in screen space.
+
+        Returns
+        -------
+        path : Path
+            The path, broken so that the label can be drawn over it.
+        angle : float
+            The rotation of the label.
+
+        Notes
+        -----
+        Both tasks are done together to avoid calculating path lengths multiple times,
+        which is relatively costly.
+
+        The method used here involves computing the path length along the contour in
+        pixel coordinates and then looking (label width / 2) away from central point to
+        determine rotation and then to break contour if desired.  The extra spacing is
+        taken into account when breaking the path, but not when computing the angle.
+        """
+        xys = path.vertices
+        codes = path.codes
+
+        # Insert a vertex at idx/pos (converting back to data space), if there isn't yet
+        # a vertex there.  With infinite precision one could also always insert the
+        # extra vertex (it will get masked out by the label below anyways), but floating
+        # point inaccuracies (the point can have undergone a data->screen->data
+        # transform loop) can slightly shift the point and e.g. shift the angle computed
+        # below from exactly zero to nonzero.
+        pos = self.get_transform().inverted().transform(screen_pos)
+        if not np.allclose(pos, xys[idx]):
+            xys = np.insert(xys, idx, pos, axis=0)
+            codes = np.insert(codes, idx, Path.LINETO)
+
+        # Find the connected component where the label will be inserted.  Note that a
+        # path always starts with a MOVETO, and we consider there's an implicit
+        # MOVETO (closing the last path) at the end.
+        movetos = (codes == Path.MOVETO).nonzero()[0]
+        start = movetos[movetos <= idx][-1]
+        try:
+            stop = movetos[movetos > idx][0]
+        except IndexError:
+            stop = len(codes)
+
+        # Restrict ourselves to the connected component.
+        cc_xys = xys[start:stop]
+        idx -= start
+
+        # If the path is closed, rotate it s.t. it starts at the label.
+        is_closed_path = codes[stop - 1] == Path.CLOSEPOLY
+        if is_closed_path:
+            cc_xys = np.concatenate([cc_xys[idx:-1], cc_xys[:idx+1]])
+            idx = 0
+
+        # Like np.interp, but additionally vectorized over fp.
+        def interp_vec(x, xp, fp): return [np.interp(x, xp, col) for col in fp.T]
+
+        # Use cumulative path lengths ("cpl") as curvilinear coordinate along contour.
+        screen_xys = self.get_transform().transform(cc_xys)
+        path_cpls = np.insert(
+            np.cumsum(np.hypot(*np.diff(screen_xys, axis=0).T)), 0, 0)
+        path_cpls -= path_cpls[idx]
+
+        # Use linear interpolation to get end coordinates of label.
+        target_cpls = np.array([-lw/2, lw/2])
+        if is_closed_path:  # For closed paths, target from the other end.
+            target_cpls[0] += (path_cpls[-1] - path_cpls[0])
+        (sx0, sx1), (sy0, sy1) = interp_vec(target_cpls, path_cpls, screen_xys)
+        angle = np.rad2deg(np.arctan2(sy1 - sy0, sx1 - sx0))  # Screen space.
+        if self.rightside_up:  # Fix angle so text is never upside-down
+            angle = (angle + 90) % 180 - 90
+
+        target_cpls += [-spacing, +spacing]  # Expand range by spacing.
+
+        # Get indices near points of interest; use -1 as out of bounds marker.
+        i0, i1 = np.interp(target_cpls, path_cpls, range(len(path_cpls)),
+                           left=-1, right=-1)
+        i0 = math.floor(i0)
+        i1 = math.ceil(i1)
+        (x0, x1), (y0, y1) = interp_vec(target_cpls, path_cpls, cc_xys)
+
+        # Actually break contours (dropping zero-len parts).
+        new_xy_blocks = []
+        new_code_blocks = []
+        if is_closed_path:
+            if i0 != -1 and i1 != -1:
+                # This is probably wrong in the case that the entire contour would
+                # be discarded, but ensures that a valid path is returned and is
+                # consistent with behavior of mpl <3.8
+                points = cc_xys[i1:i0+1]
+                new_xy_blocks.extend([[(x1, y1)], points, [(x0, y0)]])
+                nlines = len(points) + 1
+                new_code_blocks.extend([[Path.MOVETO], [Path.LINETO] * nlines])
+        else:
+            if i0 != -1:
+                new_xy_blocks.extend([cc_xys[:i0 + 1], [(x0, y0)]])
+                new_code_blocks.extend([[Path.MOVETO], [Path.LINETO] * (i0 + 1)])
+            if i1 != -1:
+                new_xy_blocks.extend([[(x1, y1)], cc_xys[i1:]])
+                new_code_blocks.extend([
+                    [Path.MOVETO], [Path.LINETO] * (len(cc_xys) - i1)])
+
+        # Back to the full path.
+        xys = np.concatenate([xys[:start], *new_xy_blocks, xys[stop:]])
+        codes = np.concatenate([codes[:start], *new_code_blocks, codes[stop:]])
+
+        return angle, Path(xys, codes)
+
+    def add_label(self, x, y, rotation, lev, cvalue):
+        """Add a contour label, respecting whether *use_clabeltext* was set."""
+        data_x, data_y = self.axes.transData.inverted().transform((x, y))
+        t = Text(
+            data_x, data_y,
+            text=self.get_text(lev, self.labelFmt),
+            rotation=rotation,
+            horizontalalignment='center', verticalalignment='center',
+            zorder=self._clabel_zorder,
+            color=self.labelMappable.to_rgba(cvalue, alpha=self.get_alpha()),
+            fontproperties=self._label_font_props,
+            clip_box=self.axes.bbox)
+        if self._use_clabeltext:
+            data_rotation, = self.axes.transData.inverted().transform_angles(
+                [rotation], [[x, y]])
+            t.set(rotation=data_rotation, transform_rotates_text=True)
+        self.labelTexts.append(t)
+        self.labelCValues.append(cvalue)
+        self.labelXYs.append((x, y))
+        # Add label to plot here - useful for manual mode label selection
+        self.axes.add_artist(t)
+
+    def add_label_near(self, x, y, inline=True, inline_spacing=5,
+                       transform=None):
+        """
+        Add a label near the point ``(x, y)``.
+
+        Parameters
+        ----------
+        x, y : float
+            The approximate location of the label.
+        inline : bool, default: True
+            If *True* remove the segment of the contour beneath the label.
+        inline_spacing : int, default: 5
+            Space in pixels to leave on each side of label when placing
+            inline. This spacing will be exact for labels at locations where
+            the contour is straight, less so for labels on curved contours.
+        transform : `.Transform` or `False`, default: ``self.axes.transData``
+            A transform applied to ``(x, y)`` before labeling.  The default
+            causes ``(x, y)`` to be interpreted as data coordinates.  `False`
+            is a synonym for `.IdentityTransform`; i.e. ``(x, y)`` should be
+            interpreted as display coordinates.
+        """
+
+        if transform is None:
+            transform = self.axes.transData
+        if transform:
+            x, y = transform.transform((x, y))
+
+        idx_level_min, idx_vtx_min, proj = self._find_nearest_contour(
+            (x, y), self.labelIndiceList)
+        path = self._paths[idx_level_min]
+        level = self.labelIndiceList.index(idx_level_min)
+        label_width = self._get_nth_label_width(level)
+        rotation, path = self._split_path_and_get_label_rotation(
+            path, idx_vtx_min, proj, label_width, inline_spacing)
+        self.add_label(*proj, rotation, self.labelLevelList[idx_level_min],
+                       self.labelCValueList[idx_level_min])
+
+        if inline:
+            self._paths[idx_level_min] = path
+
+    def pop_label(self, index=-1):
+        """Defaults to removing last label, but any index can be supplied"""
+        self.labelCValues.pop(index)
+        t = self.labelTexts.pop(index)
+        t.remove()
+
+    def labels(self, inline, inline_spacing):
+        for idx, (icon, lev, cvalue) in enumerate(zip(
+                self.labelIndiceList,
+                self.labelLevelList,
+                self.labelCValueList,
+        )):
+            trans = self.get_transform()
+            label_width = self._get_nth_label_width(idx)
+            additions = []
+            for subpath in self._paths[icon]._iter_connected_components():
+                screen_xys = trans.transform(subpath.vertices)
+                # Check if long enough for a label
+                if self.print_label(screen_xys, label_width):
+                    x, y, idx = self.locate_label(screen_xys, label_width)
+                    rotation, path = self._split_path_and_get_label_rotation(
+                        subpath, idx, (x, y),
+                        label_width, inline_spacing)
+                    self.add_label(x, y, rotation, lev, cvalue)  # Really add label.
+                    if inline:  # If inline, add new contours
+                        additions.append(path)
+                else:  # If not adding label, keep old path
+                    additions.append(subpath)
+            # After looping over all segments on a contour, replace old path by new one
+            # if inlining.
+            if inline:
+                self._paths[icon] = Path.make_compound_path(*additions)
+
+    def remove(self):
+        super().remove()
+        for text in self.labelTexts:
+            text.remove()
+
+
+def _find_closest_point_on_path(xys, p):
+    """
+    Parameters
+    ----------
+    xys : (N, 2) array-like
+        Coordinates of vertices.
+    p : (float, float)
+        Coordinates of point.
+
+    Returns
+    -------
+    d2min : float
+        Minimum square distance of *p* to *xys*.
+    proj : (float, float)
+        Projection of *p* onto *xys*.
+    imin : (int, int)
+        Consecutive indices of vertices of segment in *xys* where *proj* is.
+        Segments are considered as including their end-points; i.e. if the
+        closest point on the path is a node in *xys* with index *i*, this
+        returns ``(i-1, i)``.  For the special case where *xys* is a single
+        point, this returns ``(0, 0)``.
+    """
+    if len(xys) == 1:
+        return (((p - xys[0]) ** 2).sum(), xys[0], (0, 0))
+    dxys = xys[1:] - xys[:-1]  # Individual segment vectors.
+    norms = (dxys ** 2).sum(axis=1)
+    norms[norms == 0] = 1  # For zero-length segment, replace 0/0 by 0/1.
+    rel_projs = np.clip(  # Project onto each segment in relative 0-1 coords.
+        ((p - xys[:-1]) * dxys).sum(axis=1) / norms,
+        0, 1)[:, None]
+    projs = xys[:-1] + rel_projs * dxys  # Projs. onto each segment, in (x, y).
+    d2s = ((projs - p) ** 2).sum(axis=1)  # Squared distances.
+    imin = np.argmin(d2s)
+    return (d2s[imin], projs[imin], (imin, imin+1))
+
+
+_docstring.interpd.register(contour_set_attributes=r"""
+Attributes
+----------
+ax : `~matplotlib.axes.Axes`
+    The Axes object in which the contours are drawn.
+
+collections : `.silent_list` of `.PathCollection`\s
+    The `.Artist`\s representing the contour. This is a list of
+    `.PathCollection`\s for both line and filled contours.
+
+levels : array
+    The values of the contour levels.
+
+layers : array
+    Same as levels for line contours; half-way between
+    levels for filled contours.  See ``ContourSet._process_colors``.
+""")
+
+
+@_docstring.interpd
+class ContourSet(ContourLabeler, mcoll.Collection):
+    """
+    Store a set of contour lines or filled regions.
+
+    User-callable method: `~.Axes.clabel`
+
+    Parameters
+    ----------
+    ax : `~matplotlib.axes.Axes`
+
+    levels : [level0, level1, ..., leveln]
+        A list of floating point numbers indicating the contour levels.
+
+    allsegs : [level0segs, level1segs, ...]
+        List of all the polygon segments for all the *levels*.
+        For contour lines ``len(allsegs) == len(levels)``, and for
+        filled contour regions ``len(allsegs) = len(levels)-1``. The lists
+        should look like ::
+
+            level0segs = [polygon0, polygon1, ...]
+            polygon0 = [[x0, y0], [x1, y1], ...]
+
+    allkinds : ``None`` or [level0kinds, level1kinds, ...]
+        Optional list of all the polygon vertex kinds (code types), as
+        described and used in Path. This is used to allow multiply-
+        connected paths such as holes within filled polygons.
+        If not ``None``, ``len(allkinds) == len(allsegs)``. The lists
+        should look like ::
+
+            level0kinds = [polygon0kinds, ...]
+            polygon0kinds = [vertexcode0, vertexcode1, ...]
+
+        If *allkinds* is not ``None``, usually all polygons for a
+        particular contour level are grouped together so that
+        ``level0segs = [polygon0]`` and ``level0kinds = [polygon0kinds]``.
+
+    **kwargs
+        Keyword arguments are as described in the docstring of
+        `~.Axes.contour`.
+
+    %(contour_set_attributes)s
+    """
+
+    def __init__(self, ax, *args,
+                 levels=None, filled=False, linewidths=None, linestyles=None,
+                 hatches=(None,), alpha=None, origin=None, extent=None,
+                 cmap=None, colors=None, norm=None, vmin=None, vmax=None,
+                 colorizer=None, extend='neither', antialiased=None, nchunk=0,
+                 locator=None, transform=None, negative_linestyles=None, clip_path=None,
+                 **kwargs):
+        """
+        Draw contour lines or filled regions, depending on
+        whether keyword arg *filled* is ``False`` (default) or ``True``.
+
+        Call signature::
+
+            ContourSet(ax, levels, allsegs, [allkinds], **kwargs)
+
+        Parameters
+        ----------
+        ax : `~matplotlib.axes.Axes`
+            The `~.axes.Axes` object to draw on.
+
+        levels : [level0, level1, ..., leveln]
+            A list of floating point numbers indicating the contour
+            levels.
+
+        allsegs : [level0segs, level1segs, ...]
+            List of all the polygon segments for all the *levels*.
+            For contour lines ``len(allsegs) == len(levels)``, and for
+            filled contour regions ``len(allsegs) = len(levels)-1``. The lists
+            should look like ::
+
+                level0segs = [polygon0, polygon1, ...]
+                polygon0 = [[x0, y0], [x1, y1], ...]
+
+        allkinds : [level0kinds, level1kinds, ...], optional
+            Optional list of all the polygon vertex kinds (code types), as
+            described and used in Path. This is used to allow multiply-
+            connected paths such as holes within filled polygons.
+            If not ``None``, ``len(allkinds) == len(allsegs)``. The lists
+            should look like ::
+
+                level0kinds = [polygon0kinds, ...]
+                polygon0kinds = [vertexcode0, vertexcode1, ...]
+
+            If *allkinds* is not ``None``, usually all polygons for a
+            particular contour level are grouped together so that
+            ``level0segs = [polygon0]`` and ``level0kinds = [polygon0kinds]``.
+
+        **kwargs
+            Keyword arguments are as described in the docstring of
+            `~.Axes.contour`.
+        """
+        if antialiased is None and filled:
+            # Eliminate artifacts; we are not stroking the boundaries.
+            antialiased = False
+            # The default for line contours will be taken from the
+            # LineCollection default, which uses :rc:`lines.antialiased`.
+        super().__init__(
+            antialiaseds=antialiased,
+            alpha=alpha,
+            clip_path=clip_path,
+            transform=transform,
+            colorizer=colorizer,
+        )
+        self.axes = ax
+        self.levels = levels
+        self.filled = filled
+        self.hatches = hatches
+        self.origin = origin
+        self.extent = extent
+        self.colors = colors
+        self.extend = extend
+
+        self.nchunk = nchunk
+        self.locator = locator
+
+        if colorizer:
+            self._set_colorizer_check_keywords(colorizer, cmap=cmap,
+                                               norm=norm, vmin=vmin,
+                                               vmax=vmax, colors=colors)
+            norm = colorizer.norm
+            cmap = colorizer.cmap
+        if (isinstance(norm, mcolors.LogNorm)
+                or isinstance(self.locator, ticker.LogLocator)):
+            self.logscale = True
+            if norm is None:
+                norm = mcolors.LogNorm()
+        else:
+            self.logscale = False
+
+        _api.check_in_list([None, 'lower', 'upper', 'image'], origin=origin)
+        if self.extent is not None and len(self.extent) != 4:
+            raise ValueError(
+                "If given, 'extent' must be None or (x0, x1, y0, y1)")
+        if self.colors is not None and cmap is not None:
+            raise ValueError('Either colors or cmap must be None')
+        if self.origin == 'image':
+            self.origin = mpl.rcParams['image.origin']
+
+        self._orig_linestyles = linestyles  # Only kept for user access.
+        self.negative_linestyles = negative_linestyles
+        # If negative_linestyles was not defined as a keyword argument, define
+        # negative_linestyles with rcParams
+        if self.negative_linestyles is None:
+            self.negative_linestyles = \
+                mpl.rcParams['contour.negative_linestyle']
+
+        kwargs = self._process_args(*args, **kwargs)
+        self._process_levels()
+
+        self._extend_min = self.extend in ['min', 'both']
+        self._extend_max = self.extend in ['max', 'both']
+        if self.colors is not None:
+            if mcolors.is_color_like(self.colors):
+                color_sequence = [self.colors]
+            else:
+                color_sequence = self.colors
+
+            ncolors = len(self.levels)
+            if self.filled:
+                ncolors -= 1
+            i0 = 0
+
+            # Handle the case where colors are given for the extended
+            # parts of the contour.
+
+            use_set_under_over = False
+            # if we are extending the lower end, and we've been given enough
+            # colors then skip the first color in the resulting cmap. For the
+            # extend_max case we don't need to worry about passing more colors
+            # than ncolors as ListedColormap will clip.
+            total_levels = (ncolors +
+                            int(self._extend_min) +
+                            int(self._extend_max))
+            if (len(color_sequence) == total_levels and
+                    (self._extend_min or self._extend_max)):
+                use_set_under_over = True
+                if self._extend_min:
+                    i0 = 1
+
+            cmap = mcolors.ListedColormap(color_sequence[i0:None], N=ncolors)
+
+            if use_set_under_over:
+                if self._extend_min:
+                    cmap.set_under(color_sequence[0])
+                if self._extend_max:
+                    cmap.set_over(color_sequence[-1])
+
+        # label lists must be initialized here
+        self.labelTexts = []
+        self.labelCValues = []
+
+        self.set_cmap(cmap)
+        if norm is not None:
+            self.set_norm(norm)
+        with self.norm.callbacks.blocked(signal="changed"):
+            if vmin is not None:
+                self.norm.vmin = vmin
+            if vmax is not None:
+                self.norm.vmax = vmax
+        self.norm._changed()
+        self._process_colors()
+
+        if self._paths is None:
+            self._paths = self._make_paths_from_contour_generator()
+
+        if self.filled:
+            if linewidths is not None:
+                _api.warn_external('linewidths is ignored by contourf')
+            # Lower and upper contour levels.
+            lowers, uppers = self._get_lowers_and_uppers()
+            self.set(
+                edgecolor="none",
+                # Default zorder taken from Collection
+                zorder=kwargs.pop("zorder", 1),
+            )
+
+        else:
+            self.set(
+                facecolor="none",
+                linewidths=self._process_linewidths(linewidths),
+                linestyle=self._process_linestyles(linestyles),
+                # Default zorder taken from LineCollection, which is higher
+                # than for filled contours so that lines are displayed on top.
+                zorder=kwargs.pop("zorder", 2),
+                label="_nolegend_",
+            )
+
+        self.axes.add_collection(self, autolim=False)
+        self.sticky_edges.x[:] = [self._mins[0], self._maxs[0]]
+        self.sticky_edges.y[:] = [self._mins[1], self._maxs[1]]
+        self.axes.update_datalim([self._mins, self._maxs])
+        self.axes.autoscale_view(tight=True)
+
+        self.changed()  # set the colors
+
+        if kwargs:
+            _api.warn_external(
+                'The following kwargs were not used by contour: ' +
+                ", ".join(map(repr, kwargs))
+            )
+
+    allsegs = property(lambda self: [
+        [subp.vertices for subp in p._iter_connected_components()]
+        for p in self.get_paths()])
+    allkinds = property(lambda self: [
+        [subp.codes for subp in p._iter_connected_components()]
+        for p in self.get_paths()])
+    alpha = property(lambda self: self.get_alpha())
+    linestyles = property(lambda self: self._orig_linestyles)
+
+    def get_transform(self):
+        """Return the `.Transform` instance used by this ContourSet."""
+        if self._transform is None:
+            self._transform = self.axes.transData
+        elif (not isinstance(self._transform, mtransforms.Transform)
+              and hasattr(self._transform, '_as_mpl_transform')):
+            self._transform = self._transform._as_mpl_transform(self.axes)
+        return self._transform
+
+    def __getstate__(self):
+        state = self.__dict__.copy()
+        # the C object _contour_generator cannot currently be pickled. This
+        # isn't a big issue as it is not actually used once the contour has
+        # been calculated.
+        state['_contour_generator'] = None
+        return state
+
+    def legend_elements(self, variable_name='x', str_format=str):
+        """
+        Return a list of artists and labels suitable for passing through
+        to `~.Axes.legend` which represent this ContourSet.
+
+        The labels have the form "0 < x <= 1" stating the data ranges which
+        the artists represent.
+
+        Parameters
+        ----------
+        variable_name : str
+            The string used inside the inequality used on the labels.
+        str_format : function: float -> str
+            Function used to format the numbers in the labels.
+
+        Returns
+        -------
+        artists : list[`.Artist`]
+            A list of the artists.
+        labels : list[str]
+            A list of the labels.
+        """
+        artists = []
+        labels = []
+
+        if self.filled:
+            lowers, uppers = self._get_lowers_and_uppers()
+            n_levels = len(self._paths)
+            for idx in range(n_levels):
+                artists.append(mpatches.Rectangle(
+                    (0, 0), 1, 1,
+                    facecolor=self.get_facecolor()[idx],
+                    hatch=self.hatches[idx % len(self.hatches)],
+                ))
+                lower = str_format(lowers[idx])
+                upper = str_format(uppers[idx])
+                if idx == 0 and self.extend in ('min', 'both'):
+                    labels.append(fr'${variable_name} \leq {lower}s$')
+                elif idx == n_levels - 1 and self.extend in ('max', 'both'):
+                    labels.append(fr'${variable_name} > {upper}s$')
+                else:
+                    labels.append(fr'${lower} < {variable_name} \leq {upper}$')
+        else:
+            for idx, level in enumerate(self.levels):
+                artists.append(Line2D(
+                    [], [],
+                    color=self.get_edgecolor()[idx],
+                    linewidth=self.get_linewidths()[idx],
+                    linestyle=self.get_linestyles()[idx],
+                ))
+                labels.append(fr'${variable_name} = {str_format(level)}$')
+
+        return artists, labels
+
+    def _process_args(self, *args, **kwargs):
+        """
+        Process *args* and *kwargs*; override in derived classes.
+
+        Must set self.levels, self.zmin and self.zmax, and update Axes limits.
+        """
+        self.levels = args[0]
+        allsegs = args[1]
+        allkinds = args[2] if len(args) > 2 else None
+        self.zmax = np.max(self.levels)
+        self.zmin = np.min(self.levels)
+
+        if allkinds is None:
+            allkinds = [[None] * len(segs) for segs in allsegs]
+
+        # Check lengths of levels and allsegs.
+        if self.filled:
+            if len(allsegs) != len(self.levels) - 1:
+                raise ValueError('must be one less number of segments as '
+                                 'levels')
+        else:
+            if len(allsegs) != len(self.levels):
+                raise ValueError('must be same number of segments as levels')
+
+        # Check length of allkinds.
+        if len(allkinds) != len(allsegs):
+            raise ValueError('allkinds has different length to allsegs')
+
+        # Determine x, y bounds and update axes data limits.
+        flatseglist = [s for seg in allsegs for s in seg]
+        points = np.concatenate(flatseglist, axis=0)
+        self._mins = points.min(axis=0)
+        self._maxs = points.max(axis=0)
+
+        # Each entry in (allsegs, allkinds) is a list of (segs, kinds): segs is a list
+        # of (N, 2) arrays of xy coordinates, kinds is a list of arrays of corresponding
+        # pathcodes.  However, kinds can also be None; in which case all paths in that
+        # list are codeless (this case is normalized above).  These lists are used to
+        # construct paths, which then get concatenated.
+        self._paths = [Path.make_compound_path(*map(Path, segs, kinds))
+                       for segs, kinds in zip(allsegs, allkinds)]
+
+        return kwargs
+
+    def _make_paths_from_contour_generator(self):
+        """Compute ``paths`` using C extension."""
+        if self._paths is not None:
+            return self._paths
+        cg = self._contour_generator
+        empty_path = Path(np.empty((0, 2)))
+        vertices_and_codes = (
+            map(cg.create_filled_contour, *self._get_lowers_and_uppers())
+            if self.filled else
+            map(cg.create_contour, self.levels))
+        return [Path(np.concatenate(vs), np.concatenate(cs)) if len(vs) else empty_path
+                for vs, cs in vertices_and_codes]
+
+    def _get_lowers_and_uppers(self):
+        """
+        Return ``(lowers, uppers)`` for filled contours.
+        """
+        lowers = self._levels[:-1]
+        if self.zmin == lowers[0]:
+            # Include minimum values in lowest interval
+            lowers = lowers.copy()  # so we don't change self._levels
+            if self.logscale:
+                lowers[0] = 0.99 * self.zmin
+            else:
+                lowers[0] -= 1
+        uppers = self._levels[1:]
+        return (lowers, uppers)
+
+    def changed(self):
+        if not hasattr(self, "cvalues"):
+            self._process_colors()  # Sets cvalues.
+        # Force an autoscale immediately because self.to_rgba() calls
+        # autoscale_None() internally with the data passed to it,
+        # so if vmin/vmax are not set yet, this would override them with
+        # content from *cvalues* rather than levels like we want
+        self.norm.autoscale_None(self.levels)
+        self.set_array(self.cvalues)
+        self.update_scalarmappable()
+        alphas = np.broadcast_to(self.get_alpha(), len(self.cvalues))
+        for label, cv, alpha in zip(self.labelTexts, self.labelCValues, alphas):
+            label.set_alpha(alpha)
+            label.set_color(self.labelMappable.to_rgba(cv))
+        super().changed()
+
+    def _autolev(self, N):
+        """
+        Select contour levels to span the data.
+
+        The target number of levels, *N*, is used only when the
+        scale is not log and default locator is used.
+
+        We need two more levels for filled contours than for
+        line contours, because for the latter we need to specify
+        the lower and upper boundary of each range. For example,
+        a single contour boundary, say at z = 0, requires only
+        one contour line, but two filled regions, and therefore
+        three levels to provide boundaries for both regions.
+        """
+        if self.locator is None:
+            if self.logscale:
+                self.locator = ticker.LogLocator()
+            else:
+                self.locator = ticker.MaxNLocator(N + 1, min_n_ticks=1)
+
+        lev = self.locator.tick_values(self.zmin, self.zmax)
+
+        try:
+            if self.locator._symmetric:
+                return lev
+        except AttributeError:
+            pass
+
+        # Trim excess levels the locator may have supplied.
+        under = np.nonzero(lev < self.zmin)[0]
+        i0 = under[-1] if len(under) else 0
+        over = np.nonzero(lev > self.zmax)[0]
+        i1 = over[0] + 1 if len(over) else len(lev)
+        if self.extend in ('min', 'both'):
+            i0 += 1
+        if self.extend in ('max', 'both'):
+            i1 -= 1
+
+        if i1 - i0 < 3:
+            i0, i1 = 0, len(lev)
+
+        return lev[i0:i1]
+
+    def _process_contour_level_args(self, args, z_dtype):
+        """
+        Determine the contour levels and store in self.levels.
+        """
+        if self.levels is None:
+            if args:
+                levels_arg = args[0]
+            elif np.issubdtype(z_dtype, bool):
+                if self.filled:
+                    levels_arg = [0, .5, 1]
+                else:
+                    levels_arg = [.5]
+            else:
+                levels_arg = 7  # Default, hard-wired.
+        else:
+            levels_arg = self.levels
+        if isinstance(levels_arg, Integral):
+            self.levels = self._autolev(levels_arg)
+        else:
+            self.levels = np.asarray(levels_arg, np.float64)
+        if self.filled and len(self.levels) < 2:
+            raise ValueError("Filled contours require at least 2 levels.")
+        if len(self.levels) > 1 and np.min(np.diff(self.levels)) <= 0.0:
+            raise ValueError("Contour levels must be increasing")
+
+    def _process_levels(self):
+        """
+        Assign values to :attr:`layers` based on :attr:`levels`,
+        adding extended layers as needed if contours are filled.
+
+        For line contours, layers simply coincide with levels;
+        a line is a thin layer.  No extended levels are needed
+        with line contours.
+        """
+        # Make a private _levels to include extended regions; we
+        # want to leave the original levels attribute unchanged.
+        # (Colorbar needs this even for line contours.)
+        self._levels = list(self.levels)
+
+        if self.logscale:
+            lower, upper = 1e-250, 1e250
+        else:
+            lower, upper = -1e250, 1e250
+
+        if self.extend in ('both', 'min'):
+            self._levels.insert(0, lower)
+        if self.extend in ('both', 'max'):
+            self._levels.append(upper)
+        self._levels = np.asarray(self._levels)
+
+        if not self.filled:
+            self.layers = self.levels
+            return
+
+        # Layer values are mid-way between levels in screen space.
+        if self.logscale:
+            # Avoid overflow by taking sqrt before multiplying.
+            self.layers = (np.sqrt(self._levels[:-1])
+                           * np.sqrt(self._levels[1:]))
+        else:
+            self.layers = 0.5 * (self._levels[:-1] + self._levels[1:])
+
+    def _process_colors(self):
+        """
+        Color argument processing for contouring.
+
+        Note that we base the colormapping on the contour levels
+        and layers, not on the actual range of the Z values.  This
+        means we don't have to worry about bad values in Z, and we
+        always have the full dynamic range available for the selected
+        levels.
+
+        The color is based on the midpoint of the layer, except for
+        extended end layers.  By default, the norm vmin and vmax
+        are the extreme values of the non-extended levels.  Hence,
+        the layer color extremes are not the extreme values of
+        the colormap itself, but approach those values as the number
+        of levels increases.  An advantage of this scheme is that
+        line contours, when added to filled contours, take on
+        colors that are consistent with those of the filled regions;
+        for example, a contour line on the boundary between two
+        regions will have a color intermediate between those
+        of the regions.
+
+        """
+        self.monochrome = self.cmap.monochrome
+        if self.colors is not None:
+            # Generate integers for direct indexing.
+            i0, i1 = 0, len(self.levels)
+            if self.filled:
+                i1 -= 1
+                # Out of range indices for over and under:
+                if self.extend in ('both', 'min'):
+                    i0 -= 1
+                if self.extend in ('both', 'max'):
+                    i1 += 1
+            self.cvalues = list(range(i0, i1))
+            self.set_norm(mcolors.NoNorm())
+        else:
+            self.cvalues = self.layers
+        self.norm.autoscale_None(self.levels)
+        self.set_array(self.cvalues)
+        self.update_scalarmappable()
+        if self.extend in ('both', 'max', 'min'):
+            self.norm.clip = False
+
+    def _process_linewidths(self, linewidths):
+        Nlev = len(self.levels)
+        if linewidths is None:
+            default_linewidth = mpl.rcParams['contour.linewidth']
+            if default_linewidth is None:
+                default_linewidth = mpl.rcParams['lines.linewidth']
+            return [default_linewidth] * Nlev
+        elif not np.iterable(linewidths):
+            return [linewidths] * Nlev
+        else:
+            linewidths = list(linewidths)
+            return (linewidths * math.ceil(Nlev / len(linewidths)))[:Nlev]
+
+    def _process_linestyles(self, linestyles):
+        Nlev = len(self.levels)
+        if linestyles is None:
+            tlinestyles = ['solid'] * Nlev
+            if self.monochrome:
+                eps = - (self.zmax - self.zmin) * 1e-15
+                for i, lev in enumerate(self.levels):
+                    if lev < eps:
+                        tlinestyles[i] = self.negative_linestyles
+        else:
+            if isinstance(linestyles, str):
+                tlinestyles = [linestyles] * Nlev
+            elif np.iterable(linestyles):
+                tlinestyles = list(linestyles)
+                if len(tlinestyles) < Nlev:
+                    nreps = int(np.ceil(Nlev / len(linestyles)))
+                    tlinestyles = tlinestyles * nreps
+                if len(tlinestyles) > Nlev:
+                    tlinestyles = tlinestyles[:Nlev]
+            else:
+                raise ValueError("Unrecognized type for linestyles kwarg")
+        return tlinestyles
+
+    def _find_nearest_contour(self, xy, indices=None):
+        """
+        Find the point in the unfilled contour plot that is closest (in screen
+        space) to point *xy*.
+
+        Parameters
+        ----------
+        xy : tuple[float, float]
+            The reference point (in screen space).
+        indices : list of int or None, default: None
+            Indices of contour levels to consider.  If None (the default), all levels
+            are considered.
+
+        Returns
+        -------
+        idx_level_min : int
+            The index of the contour level closest to *xy*.
+        idx_vtx_min : int
+            The index of the `.Path` segment closest to *xy* (at that level).
+        proj : (float, float)
+            The point in the contour plot closest to *xy*.
+        """
+
+        # Convert each contour segment to pixel coordinates and then compare the given
+        # point to those coordinates for each contour. This is fast enough in normal
+        # cases, but speedups may be possible.
+
+        if self.filled:
+            raise ValueError("Method does not support filled contours")
+
+        if indices is None:
+            indices = range(len(self._paths))
+
+        d2min = np.inf
+        idx_level_min = idx_vtx_min = proj_min = None
+
+        for idx_level in indices:
+            path = self._paths[idx_level]
+            idx_vtx_start = 0
+            for subpath in path._iter_connected_components():
+                if not len(subpath.vertices):
+                    continue
+                lc = self.get_transform().transform(subpath.vertices)
+                d2, proj, leg = _find_closest_point_on_path(lc, xy)
+                if d2 < d2min:
+                    d2min = d2
+                    idx_level_min = idx_level
+                    idx_vtx_min = leg[1] + idx_vtx_start
+                    proj_min = proj
+                idx_vtx_start += len(subpath)
+
+        return idx_level_min, idx_vtx_min, proj_min
+
+    def find_nearest_contour(self, x, y, indices=None, pixel=True):
+        """
+        Find the point in the contour plot that is closest to ``(x, y)``.
+
+        This method does not support filled contours.
+
+        Parameters
+        ----------
+        x, y : float
+            The reference point.
+        indices : list of int or None, default: None
+            Indices of contour levels to consider.  If None (the default), all
+            levels are considered.
+        pixel : bool, default: True
+            If *True*, measure distance in pixel (screen) space, which is
+            useful for manual contour labeling; else, measure distance in axes
+            space.
+
+        Returns
+        -------
+        path : int
+            The index of the path that is closest to ``(x, y)``.  Each path corresponds
+            to one contour level.
+        subpath : int
+            The index within that closest path of the subpath that is closest to
+            ``(x, y)``.  Each subpath corresponds to one unbroken contour line.
+        index : int
+            The index of the vertices within that subpath that are closest to
+            ``(x, y)``.
+        xmin, ymin : float
+            The point in the contour plot that is closest to ``(x, y)``.
+        d2 : float
+            The squared distance from ``(xmin, ymin)`` to ``(x, y)``.
+        """
+        segment = index = d2 = None
+
+        with ExitStack() as stack:
+            if not pixel:
+                # _find_nearest_contour works in pixel space. We want axes space, so
+                # effectively disable the transformation here by setting to identity.
+                stack.enter_context(self._cm_set(
+                    transform=mtransforms.IdentityTransform()))
+
+            i_level, i_vtx, (xmin, ymin) = self._find_nearest_contour((x, y), indices)
+
+        if i_level is not None:
+            cc_cumlens = np.cumsum(
+                [*map(len, self._paths[i_level]._iter_connected_components())])
+            segment = cc_cumlens.searchsorted(i_vtx, "right")
+            index = i_vtx if segment == 0 else i_vtx - cc_cumlens[segment - 1]
+            d2 = (xmin-x)**2 + (ymin-y)**2
+
+        return (i_level, segment, index, xmin, ymin, d2)
+
+    def draw(self, renderer):
+        paths = self._paths
+        n_paths = len(paths)
+        if not self.filled or all(hatch is None for hatch in self.hatches):
+            super().draw(renderer)
+            return
+        # In presence of hatching, draw contours one at a time.
+        edgecolors = self.get_edgecolors()
+        if edgecolors.size == 0:
+            edgecolors = ("none",)
+        for idx in range(n_paths):
+            with cbook._setattr_cm(self, _paths=[paths[idx]]), self._cm_set(
+                hatch=self.hatches[idx % len(self.hatches)],
+                array=[self.get_array()[idx]],
+                linewidths=[self.get_linewidths()[idx % len(self.get_linewidths())]],
+                linestyles=[self.get_linestyles()[idx % len(self.get_linestyles())]],
+                edgecolors=edgecolors[idx % len(edgecolors)],
+            ):
+                super().draw(renderer)
+
+
+@_docstring.interpd
+class QuadContourSet(ContourSet):
+    """
+    Create and store a set of contour lines or filled regions.
+
+    This class is typically not instantiated directly by the user but by
+    `~.Axes.contour` and `~.Axes.contourf`.
+
+    %(contour_set_attributes)s
+    """
+
+    def _process_args(self, *args, corner_mask=None, algorithm=None, **kwargs):
+        """
+        Process args and kwargs.
+        """
+        if args and isinstance(args[0], QuadContourSet):
+            if self.levels is None:
+                self.levels = args[0].levels
+            self.zmin = args[0].zmin
+            self.zmax = args[0].zmax
+            self._corner_mask = args[0]._corner_mask
+            contour_generator = args[0]._contour_generator
+            self._mins = args[0]._mins
+            self._maxs = args[0]._maxs
+            self._algorithm = args[0]._algorithm
+        else:
+            import contourpy
+
+            if algorithm is None:
+                algorithm = mpl.rcParams['contour.algorithm']
+            mpl.rcParams.validate["contour.algorithm"](algorithm)
+            self._algorithm = algorithm
+
+            if corner_mask is None:
+                if self._algorithm == "mpl2005":
+                    # mpl2005 does not support corner_mask=True so if not
+                    # specifically requested then disable it.
+                    corner_mask = False
+                else:
+                    corner_mask = mpl.rcParams['contour.corner_mask']
+            self._corner_mask = corner_mask
+
+            x, y, z = self._contour_args(args, kwargs)
+
+            contour_generator = contourpy.contour_generator(
+                x, y, z, name=self._algorithm, corner_mask=self._corner_mask,
+                line_type=contourpy.LineType.SeparateCode,
+                fill_type=contourpy.FillType.OuterCode,
+                chunk_size=self.nchunk)
+
+            t = self.get_transform()
+
+            # if the transform is not trans data, and some part of it
+            # contains transData, transform the xs and ys to data coordinates
+            if (t != self.axes.transData and
+                    any(t.contains_branch_seperately(self.axes.transData))):
+                trans_to_data = t - self.axes.transData
+                pts = np.vstack([x.flat, y.flat]).T
+                transformed_pts = trans_to_data.transform(pts)
+                x = transformed_pts[..., 0]
+                y = transformed_pts[..., 1]
+
+            self._mins = [ma.min(x), ma.min(y)]
+            self._maxs = [ma.max(x), ma.max(y)]
+
+        self._contour_generator = contour_generator
+
+        return kwargs
+
+    def _contour_args(self, args, kwargs):
+        if self.filled:
+            fn = 'contourf'
+        else:
+            fn = 'contour'
+        nargs = len(args)
+
+        if 0 < nargs <= 2:
+            z, *args = args
+            z = ma.asarray(z)
+            x, y = self._initialize_x_y(z)
+        elif 2 < nargs <= 4:
+            x, y, z_orig, *args = args
+            x, y, z = self._check_xyz(x, y, z_orig, kwargs)
+
+        else:
+            raise _api.nargs_error(fn, takes="from 1 to 4", given=nargs)
+        z = ma.masked_invalid(z, copy=False)
+        self.zmax = z.max().astype(float)
+        self.zmin = z.min().astype(float)
+        if self.logscale and self.zmin <= 0:
+            z = ma.masked_where(z <= 0, z)
+            _api.warn_external('Log scale: values of z <= 0 have been masked')
+            self.zmin = z.min().astype(float)
+        self._process_contour_level_args(args, z.dtype)
+        return (x, y, z)
+
+    def _check_xyz(self, x, y, z, kwargs):
+        """
+        Check that the shapes of the input arrays match; if x and y are 1D,
+        convert them to 2D using meshgrid.
+        """
+        x, y = self.axes._process_unit_info([("x", x), ("y", y)], kwargs)
+
+        x = np.asarray(x, dtype=np.float64)
+        y = np.asarray(y, dtype=np.float64)
+        z = ma.asarray(z)
+
+        if z.ndim != 2:
+            raise TypeError(f"Input z must be 2D, not {z.ndim}D")
+        if z.shape[0] < 2 or z.shape[1] < 2:
+            raise TypeError(f"Input z must be at least a (2, 2) shaped array, "
+                            f"but has shape {z.shape}")
+        Ny, Nx = z.shape
+
+        if x.ndim != y.ndim:
+            raise TypeError(f"Number of dimensions of x ({x.ndim}) and y "
+                            f"({y.ndim}) do not match")
+        if x.ndim == 1:
+            nx, = x.shape
+            ny, = y.shape
+            if nx != Nx:
+                raise TypeError(f"Length of x ({nx}) must match number of "
+                                f"columns in z ({Nx})")
+            if ny != Ny:
+                raise TypeError(f"Length of y ({ny}) must match number of "
+                                f"rows in z ({Ny})")
+            x, y = np.meshgrid(x, y)
+        elif x.ndim == 2:
+            if x.shape != z.shape:
+                raise TypeError(
+                    f"Shapes of x {x.shape} and z {z.shape} do not match")
+            if y.shape != z.shape:
+                raise TypeError(
+                    f"Shapes of y {y.shape} and z {z.shape} do not match")
+        else:
+            raise TypeError(f"Inputs x and y must be 1D or 2D, not {x.ndim}D")
+
+        return x, y, z
+
+    def _initialize_x_y(self, z):
+        """
+        Return X, Y arrays such that contour(Z) will match imshow(Z)
+        if origin is not None.
+        The center of pixel Z[i, j] depends on origin:
+        if origin is None, x = j, y = i;
+        if origin is 'lower', x = j + 0.5, y = i + 0.5;
+        if origin is 'upper', x = j + 0.5, y = Nrows - i - 0.5
+        If extent is not None, x and y will be scaled to match,
+        as in imshow.
+        If origin is None and extent is not None, then extent
+        will give the minimum and maximum values of x and y.
+        """
+        if z.ndim != 2:
+            raise TypeError(f"Input z must be 2D, not {z.ndim}D")
+        elif z.shape[0] < 2 or z.shape[1] < 2:
+            raise TypeError(f"Input z must be at least a (2, 2) shaped array, "
+                            f"but has shape {z.shape}")
+        else:
+            Ny, Nx = z.shape
+        if self.origin is None:  # Not for image-matching.
+            if self.extent is None:
+                return np.meshgrid(np.arange(Nx), np.arange(Ny))
+            else:
+                x0, x1, y0, y1 = self.extent
+                x = np.linspace(x0, x1, Nx)
+                y = np.linspace(y0, y1, Ny)
+                return np.meshgrid(x, y)
+        # Match image behavior:
+        if self.extent is None:
+            x0, x1, y0, y1 = (0, Nx, 0, Ny)
+        else:
+            x0, x1, y0, y1 = self.extent
+        dx = (x1 - x0) / Nx
+        dy = (y1 - y0) / Ny
+        x = x0 + (np.arange(Nx) + 0.5) * dx
+        y = y0 + (np.arange(Ny) + 0.5) * dy
+        if self.origin == 'upper':
+            y = y[::-1]
+        return np.meshgrid(x, y)
+
+
+_docstring.interpd.register(contour_doc="""
+`.contour` and `.contourf` draw contour lines and filled contours,
+respectively.  Except as noted, function signatures and return values
+are the same for both versions.
+
+Parameters
+----------
+X, Y : array-like, optional
+    The coordinates of the values in *Z*.
+
+    *X* and *Y* must both be 2D with the same shape as *Z* (e.g.
+    created via `numpy.meshgrid`), or they must both be 1-D such
+    that ``len(X) == N`` is the number of columns in *Z* and
+    ``len(Y) == M`` is the number of rows in *Z*.
+
+    *X* and *Y* must both be ordered monotonically.
+
+    If not given, they are assumed to be integer indices, i.e.
+    ``X = range(N)``, ``Y = range(M)``.
+
+Z : (M, N) array-like
+    The height values over which the contour is drawn.  Color-mapping is
+    controlled by *cmap*, *norm*, *vmin*, and *vmax*.
+
+levels : int or array-like, optional
+    Determines the number and positions of the contour lines / regions.
+
+    If an int *n*, use `~matplotlib.ticker.MaxNLocator`, which tries
+    to automatically choose no more than *n+1* "nice" contour levels
+    between minimum and maximum numeric values of *Z*.
+
+    If array-like, draw contour lines at the specified levels.
+    The values must be in increasing order.
+
+Returns
+-------
+`~.contour.QuadContourSet`
+
+Other Parameters
+----------------
+corner_mask : bool, default: :rc:`contour.corner_mask`
+    Enable/disable corner masking, which only has an effect if *Z* is
+    a masked array.  If ``False``, any quad touching a masked point is
+    masked out.  If ``True``, only the triangular corners of quads
+    nearest those points are always masked out, other triangular
+    corners comprising three unmasked points are contoured as usual.
+
+colors : :mpltype:`color` or list of :mpltype:`color`, optional
+    The colors of the levels, i.e. the lines for `.contour` and the
+    areas for `.contourf`.
+
+    The sequence is cycled for the levels in ascending order. If the
+    sequence is shorter than the number of levels, it's repeated.
+
+    As a shortcut, a single color may be used in place of one-element lists, i.e.
+    ``'red'`` instead of ``['red']`` to color all levels with the same color.
+
+    .. versionchanged:: 3.10
+        Previously a single color had to be expressed as a string, but now any
+        valid color format may be passed.
+
+    By default (value *None*), the colormap specified by *cmap*
+    will be used.
+
+alpha : float, default: 1
+    The alpha blending value, between 0 (transparent) and 1 (opaque).
+
+%(cmap_doc)s
+
+    This parameter is ignored if *colors* is set.
+
+%(norm_doc)s
+
+    This parameter is ignored if *colors* is set.
+
+%(vmin_vmax_doc)s
+
+    If *vmin* or *vmax* are not given, the default color scaling is based on
+    *levels*.
+
+    This parameter is ignored if *colors* is set.
+
+%(colorizer_doc)s
+
+    This parameter is ignored if *colors* is set.
+
+origin : {*None*, 'upper', 'lower', 'image'}, default: None
+    Determines the orientation and exact position of *Z* by specifying
+    the position of ``Z[0, 0]``.  This is only relevant, if *X*, *Y*
+    are not given.
+
+    - *None*: ``Z[0, 0]`` is at X=0, Y=0 in the lower left corner.
+    - 'lower': ``Z[0, 0]`` is at X=0.5, Y=0.5 in the lower left corner.
+    - 'upper': ``Z[0, 0]`` is at X=N+0.5, Y=0.5 in the upper left
+      corner.
+    - 'image': Use the value from :rc:`image.origin`.
+
+extent : (x0, x1, y0, y1), optional
+    If *origin* is not *None*, then *extent* is interpreted as in
+    `.imshow`: it gives the outer pixel boundaries. In this case, the
+    position of Z[0, 0] is the center of the pixel, not a corner. If
+    *origin* is *None*, then (*x0*, *y0*) is the position of Z[0, 0],
+    and (*x1*, *y1*) is the position of Z[-1, -1].
+
+    This argument is ignored if *X* and *Y* are specified in the call
+    to contour.
+
+locator : ticker.Locator subclass, optional
+    The locator is used to determine the contour levels if they
+    are not given explicitly via *levels*.
+    Defaults to `~.ticker.MaxNLocator`.
+
+extend : {'neither', 'both', 'min', 'max'}, default: 'neither'
+    Determines the ``contourf``-coloring of values that are outside the
+    *levels* range.
+
+    If 'neither', values outside the *levels* range are not colored.
+    If 'min', 'max' or 'both', color the values below, above or below
+    and above the *levels* range.
+
+    Values below ``min(levels)`` and above ``max(levels)`` are mapped
+    to the under/over values of the `.Colormap`. Note that most
+    colormaps do not have dedicated colors for these by default, so
+    that the over and under values are the edge values of the colormap.
+    You may want to set these values explicitly using
+    `.Colormap.set_under` and `.Colormap.set_over`.
+
+    .. note::
+
+        An existing `.QuadContourSet` does not get notified if
+        properties of its colormap are changed. Therefore, an explicit
+        call `~.ContourSet.changed()` is needed after modifying the
+        colormap. The explicit call can be left out, if a colorbar is
+        assigned to the `.QuadContourSet` because it internally calls
+        `~.ContourSet.changed()`.
+
+    Example::
+
+        x = np.arange(1, 10)
+        y = x.reshape(-1, 1)
+        h = x * y
+
+        cs = plt.contourf(h, levels=[10, 30, 50],
+            colors=['#808080', '#A0A0A0', '#C0C0C0'], extend='both')
+        cs.cmap.set_over('red')
+        cs.cmap.set_under('blue')
+        cs.changed()
+
+xunits, yunits : registered units, optional
+    Override axis units by specifying an instance of a
+    :class:`matplotlib.units.ConversionInterface`.
+
+antialiased : bool, optional
+    Enable antialiasing, overriding the defaults.  For
+    filled contours, the default is *False*.  For line contours,
+    it is taken from :rc:`lines.antialiased`.
+
+nchunk : int >= 0, optional
+    If 0, no subdivision of the domain.  Specify a positive integer to
+    divide the domain into subdomains of *nchunk* by *nchunk* quads.
+    Chunking reduces the maximum length of polygons generated by the
+    contouring algorithm which reduces the rendering workload passed
+    on to the backend and also requires slightly less RAM.  It can
+    however introduce rendering artifacts at chunk boundaries depending
+    on the backend, the *antialiased* flag and value of *alpha*.
+
+linewidths : float or array-like, default: :rc:`contour.linewidth`
+    *Only applies to* `.contour`.
+
+    The line width of the contour lines.
+
+    If a number, all levels will be plotted with this linewidth.
+
+    If a sequence, the levels in ascending order will be plotted with
+    the linewidths in the order specified.
+
+    If None, this falls back to :rc:`lines.linewidth`.
+
+linestyles : {*None*, 'solid', 'dashed', 'dashdot', 'dotted'}, optional
+    *Only applies to* `.contour`.
+
+    If *linestyles* is *None*, the default is 'solid' unless the lines are
+    monochrome. In that case, negative contours will instead take their
+    linestyle from the *negative_linestyles* argument.
+
+    *linestyles* can also be an iterable of the above strings specifying a set
+    of linestyles to be used. If this iterable is shorter than the number of
+    contour levels it will be repeated as necessary.
+
+negative_linestyles : {*None*, 'solid', 'dashed', 'dashdot', 'dotted'}, \
+                       optional
+    *Only applies to* `.contour`.
+
+    If *linestyles* is *None* and the lines are monochrome, this argument
+    specifies the line style for negative contours.
+
+    If *negative_linestyles* is *None*, the default is taken from
+    :rc:`contour.negative_linestyle`.
+
+    *negative_linestyles* can also be an iterable of the above strings
+    specifying a set of linestyles to be used. If this iterable is shorter than
+    the number of contour levels it will be repeated as necessary.
+
+hatches : list[str], optional
+    *Only applies to* `.contourf`.
+
+    A list of cross hatch patterns to use on the filled areas.
+    If None, no hatching will be added to the contour.
+
+algorithm : {'mpl2005', 'mpl2014', 'serial', 'threaded'}, optional
+    Which contouring algorithm to use to calculate the contour lines and
+    polygons. The algorithms are implemented in
+    `ContourPy <https://github.com/contourpy/contourpy>`_, consult the
+    `ContourPy documentation <https://contourpy.readthedocs.io>`_ for
+    further information.
+
+    The default is taken from :rc:`contour.algorithm`.
+
+clip_path : `~matplotlib.patches.Patch` or `.Path` or `.TransformedPath`
+    Set the clip path.  See `~matplotlib.artist.Artist.set_clip_path`.
+
+    .. versionadded:: 3.8
+
+data : indexable object, optional
+    DATA_PARAMETER_PLACEHOLDER
+
+Notes
+-----
+1. `.contourf` differs from the MATLAB version in that it does not draw
+   the polygon edges. To draw edges, add line contours with calls to
+   `.contour`.
+
+2. `.contourf` fills intervals that are closed at the top; that is, for
+   boundaries *z1* and *z2*, the filled region is::
+
+      z1 < Z <= z2
+
+   except for the lowest interval, which is closed on both sides (i.e.
+   it includes the lowest value).
+
+3. `.contour` and `.contourf` use a `marching squares
+   <https://en.wikipedia.org/wiki/Marching_squares>`_ algorithm to
+   compute contour locations.  More information can be found in
+   `ContourPy documentation <https://contourpy.readthedocs.io>`_.
+""" % _docstring.interpd.params)