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