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