| | '''OpenGL extension SGIS.texture4D |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.SGIS.texture4D to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | This extension defines 4-dimensional texture mapping. If EXT_subtexture |
| | is supported, this extension also defines a mechanism to redefine a |
| | portion of an existing 4-dimensional texture image. Because |
| | EXT_texture3D is required, this extension utilizes the 3-dimensional |
| | image support defined in by EXT_texture3D as a base for 4-dimensional |
| | image manipulation. |
| | |
| | The 4th dimension has an abstract, rather than physical, reference |
| | and will be called "extent", since the definition of extent is "that which |
| | specifies the range or magnitude of an area or volume." |
| | |
| | Four-dimensional texture mapping is more constrained than its one, two, |
| | and three-dimensional counterparts. Mipmapping is not supported, so |
| | only the level-zero 4-dimensional texture image can be defined. Cubic |
| | filtering is not supported, so the border width must be either zero or |
| | one. |
| | |
| | Four-dimensional textures are used primarily as color lookup tables for |
| | color conversion. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/SGIS/texture4D.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.texture4D import * |
| | from OpenGL.raw.GL.SGIS.texture4D import _EXTENSION_NAME |
| |
|
| | def glInitTexture4DSGIS(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
|
| | |
| | glTexImage4DSGIS=wrapper.wrapper(glTexImage4DSGIS).setInputArraySize( |
| | 'pixels', None |
| | ) |
| | |
| | glTexSubImage4DSGIS=wrapper.wrapper(glTexSubImage4DSGIS).setInputArraySize( |
| | 'pixels', None |
| | ) |
| | |
| |
|
| | from OpenGL.GL import images as _i |
| | _i.images.RANK_PACKINGS.setdefault(4,[]).extend([ |
| | (_i.GL_1_1.glPixelStorei,GL_PACK_SKIP_VOLUMES_SGIS, 0), |
| | (_i.GL_1_1.glPixelStorei,GL_PACK_IMAGE_DEPTH_SGIS, 0), |
| | ]) |
| |
|