| '''OpenGL extension AMD.texture_texture4 |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.AMD.texture_texture4 to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension adds new shading language built-in texture functions |
| to the shading language. |
| |
| These texture functions may be used to access one component textures. |
| |
| The texture4 built-in function returns a texture value derived from |
| a 2x2 set of texels in the image array of level levelbase is selected. |
| These texels are selected in the same way as when the value of |
| TEXTURE_MIN_FILTER is LINEAR, but instead of these texels being |
| filtered to generate the texture value, the R, G, B and A texture values |
| are derived directly from these four texels. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/AMD/texture_texture4.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.AMD.texture_texture4 import * |
| from OpenGL.raw.GL.AMD.texture_texture4 import _EXTENSION_NAME |
|
|
| def glInitTextureTexture4AMD(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
|
|
| |
