| '''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 |
| ) |
| |
