| | '''OpenGL extension INTEL.map_texture |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.INTEL.map_texture to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | Systems with integrated GPUs can share the same physical memory between CPU |
| | and GPU. This feature, if exposed by API, can bring significant performance |
| | benefits for graphics applications by reducing the complexity of |
| | uploading/accessing texture contents. This extension enables CPU direct |
| | access to the GPU memory holding textures. |
| | |
| | The problem with texture memory directly exposed to clients is that |
| | textures are often 'tiled'. Texels are kept in specific layout to improve |
| | locality of reference and thus performance of texturing. This 'tiling' |
| | is specific to particular hardware and would be thus difficult to use. |
| | |
| | This extension allows to create textures with 'linear' layout which allows |
| | for simplified access on user side (potentially sacrificing some |
| | performance during texture sampling). |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/INTEL/map_texture.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.INTEL.map_texture import * |
| | from OpenGL.raw.GL.INTEL.map_texture import _EXTENSION_NAME |
| |
|
| | def glInitMapTextureINTEL(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
|
| | glMapTexture2DINTEL=wrapper.wrapper(glMapTexture2DINTEL).setInputArraySize( |
| | 'stride', 1 |
| | ).setInputArraySize( |
| | 'layout', 1 |
| | ) |
| | |
