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