| '''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 ) |
|
|
|
|
| |
