| | '''OpenGL extension NV.blend_square |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.NV.blend_square to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | It is useful to be able to multiply a number by itself in the blending |
| | stages -- for example, in certain types of specular lighting effects |
| | where a result from a dot product needs to be taken to a high power. |
| | |
| | This extension provides four additional blending factors to permit |
| | this and other effects: SRC_COLOR and ONE_MINUS_SRC_COLOR for source |
| | blending factors, and DST_COLOR and ONE_MINUS_DST_COLOR for destination |
| | blending factors. |
| | |
| | Direct3D provides capability bits for advertising these additional |
| | blend modes. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/NV/blend_square.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.NV.blend_square import * |
| | from OpenGL.raw.GL.NV.blend_square import _EXTENSION_NAME |
| |
|
| | def glInitBlendSquareNV(): |
| | '''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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| | |
