| | '''OpenGL extension ARB.conservative_depth |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.ARB.conservative_depth to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | There is a common optimization for hardware accelerated implementation of |
| | OpenGL which relies on an early depth test to be run before the fragment |
| | shader so that the shader evaluation can be skipped if the fragment ends |
| | up being discarded because it is occluded. |
| | |
| | This optimization does not affect the final rendering, and is typically |
| | possible when the fragment does not change the depth programmatically. |
| | (i.e.: it does not write to the built-in gl_FragDepth output). There are, |
| | however a class of operations on the depth in the shader which could |
| | still be performed while allowing the early depth test to operate. |
| | |
| | This extension allows the application to pass enough information to the |
| | GL implementation to activate such optimizations safely. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/ARB/conservative_depth.txt |
| | ''' |
| | from OpenGL import platform, constant, arrays |
| | from OpenGL import extensions, wrapper |
| | import ctypes |
| | from OpenGL.raw.GL import _types, _glgets |
| | from OpenGL.raw.GL.ARB.conservative_depth import * |
| | from OpenGL.raw.GL.ARB.conservative_depth import _EXTENSION_NAME |
| |
|
| | def glInitConservativeDepthARB(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
|
| |
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| | |
