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| from __future__ import annotations |
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| from . import BmpImagePlugin, Image, ImageOps |
| from ._binary import i16le as i16 |
| from ._binary import i32le as i32 |
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| def _accept(prefix: bytes) -> bool: |
| return prefix.startswith(b"\0\0\2\0") |
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|
| class CurImageFile(BmpImagePlugin.BmpImageFile): |
| format = "CUR" |
| format_description = "Windows Cursor" |
|
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| def _open(self) -> None: |
| assert self.fp is not None |
| offset = self.fp.tell() |
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| |
| s = self.fp.read(6) |
| if not _accept(s): |
| msg = "not a CUR file" |
| raise SyntaxError(msg) |
|
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| |
| m = b"" |
| for i in range(i16(s, 4)): |
| s = self.fp.read(16) |
| if not m: |
| m = s |
| elif s[0] > m[0] and s[1] > m[1]: |
| m = s |
| if not m: |
| msg = "No cursors were found" |
| raise TypeError(msg) |
|
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| |
| self._bitmap(i32(m, 12) + offset) |
| self._masked = self.mode in ("1", "L") |
| if self._masked: |
| self._rawmode = self.mode |
| self._mode = "LA" |
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| |
| self._size = self.width, self.height // 2 |
| if not self._masked: |
| self.tile = [self.tile[0]._replace(extents=(0, 0) + self.size)] |
|
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| def load_prepare(self) -> None: |
| if self._masked: |
| self._mode = self._rawmode |
| self._size = self.width, self.height * 2 |
| super().load_prepare() |
|
|
| def load_end(self) -> None: |
| if not self._masked: |
| return |
| self._mode = "LA" |
| new_height = self.height // 2 |
|
|
| and_mask = self.im.crop((0, 0, self.width, new_height)) |
| xor_mask = self.im.crop((0, new_height, self.width, self.height)) |
|
|
| self._size = self.width, new_height |
| self._im = Image.core.fill(self.mode, self.size) |
| self._im.paste( |
| xor_mask.convert(self.mode), |
| (0, 0) + self.size, |
| ImageOps.invert(Image.Image()._new(and_mask)).im, |
| ) |
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| Image.register_open(CurImageFile.format, CurImageFile, _accept) |
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| Image.register_extension(CurImageFile.format, ".cur") |
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|
