| | '''OpenGL extension SGIX.pbuffer |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GLX.SGIX.pbuffer to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension defines pixel buffers (GLXPbuffers, or pbuffer for |
| | short). GLXPbuffers are additional non-visible rendering buffers for an |
| | OpenGL renderer. GLXPbuffers are equivalent to GLXPixmaps with the |
| | following exceptions: |
| | |
| | 1. There is no associated X pixmap. Also, since a GLXPbuffer is a GLX |
| | resource, it may not be possible to render to it using X or an |
| | X extension other than GLX. |
| | |
| | 2. The format of the color buffers and the type and size of any |
| | associated ancillary buffers for a GLXPbuffer can only be |
| | described with a GLXFBConfig -- an X Visual cannot be used. |
| | |
| | 3. It is possible to create a GLXPbuffer whose contents may be |
| | asynchronously lost at any time. |
| | |
| | 4. GLXPbuffers can be rendered to using either direct or indirect |
| | rendering contexts. |
| | |
| | 5. The allocation of a GLXPbuffer can fail if there are insufficient |
| | resources (i.e., all the pbuffer memory has been allocated and |
| | the implementation does not virtualize pbuffer memory.) |
| | |
| | The intent of the pbuffer semantics is to enable implementations to |
| | allocate pbuffers in non-visible frame buffer memory. These |
| | pbuffers are intended to be "static" resources, in that a program |
| | will typically allocate them only once, rather than as a part of its |
| | rendering loop. (But they should be deallocated when the program is |
| | no longer using them -- for example, if the program is iconified.) |
| | The frame buffer resources that are associated with a pbuffer are |
| | also static, and are deallocated only when the pbuffer is destroyed, |
| | or, in the case of a "unpreserved" pbuffer, as a result of X server |
| | activity that changes its frame buffer requirements. |
| | |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/SGIX/pbuffer.txt |
| | ''' |
| | from OpenGL import platform, constant, arrays |
| | from OpenGL import extensions, wrapper |
| | import ctypes |
| | from OpenGL.raw.GLX import _types, _glgets |
| | from OpenGL.raw.GLX.SGIX.pbuffer import * |
| | from OpenGL.raw.GLX.SGIX.pbuffer import _EXTENSION_NAME |
| |
|
| | def glInitPbufferSGIX(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
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| |
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| | |
