| | '''OpenGL extension SGIX.blend_alpha_minmax |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.SGIX.blend_alpha_minmax to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | Two additional blending equations are specified using the interface |
| | defined by EXT_blend_minmax. These equations are similar to the |
| | MIN_EXT and MAX_EXT blending equations, but the outcome for all four |
| | color components is determined by a comparison of just the alpha |
| | component's source and destination values. These equations are useful |
| | in image processing and advanced shading algorithms. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/SGIX/blend_alpha_minmax.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.SGIX.blend_alpha_minmax import * |
| | from OpenGL.raw.GL.SGIX.blend_alpha_minmax import _EXTENSION_NAME |
| |
|
| | def glInitBlendAlphaMinmaxSGIX(): |
| | '''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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| | |
