| | '''OpenGL extension SGIS.texture_select |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.SGIS.texture_select to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension introduces several new texture internal formats. The |
| | purpose of these new formats is to reorganize the components of a |
| | texture into groups of components. The currently selected group |
| | effectively becomes the internal format. |
| | |
| | Also, two new texture parameters are introduced that control the |
| | selection of these groups of components. |
| | |
| | For example, assume a texture internal format of DUAL_LUMINANCE4_SGIS is |
| | specified. Now there are two groups of components, where each group has |
| | a format of LUMINANCE4. One of the two LUMINANCE groups is always |
| | selected. components can be selected and then interpreted as a LUMINANCE |
| | texture. |
| | |
| | The purpose of this extension is allow better utilization of texture |
| | memory by subdividing the internal representation of a texel into 1, 2, |
| | or 4 smaller texels. Additionally, this may improve performance of |
| | texture downloads. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/SGIS/texture_select.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.SGIS.texture_select import * |
| | from OpenGL.raw.GL.SGIS.texture_select import _EXTENSION_NAME |
| |
|
| | def glInitTextureSelectSGIS(): |
| | '''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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| | |
