| '''OpenGL extension EXT.raster_multisample |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GLES2.EXT.raster_multisample to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension allows rendering to a non-multisample color buffer while |
| rasterizing with more than one sample. The result of rasterization |
| (coverage) is available in the gl_SampleMaskIn[] fragment shader input, |
| multisample rasterization is enabled for all primitives, and several per- |
| fragment operations operate at the raster sample rate. |
| |
| When using the functionality provided by this extension, depth, stencil, |
| and depth bounds tests must be disabled, and a multisample draw |
| framebuffer must not be used. |
| |
| A fragment's "coverage", or "effective raster samples" is considered to |
| have "N bits" (as opposed to "one bit" corresponding to the single color |
| sample) through the fragment shader, in the sample mask output, through |
| the multisample fragment operations and occlusion query, until the coverage |
| is finally "reduced" to a single bit in a new "Coverage Reduction" stage |
| that occurs before blending. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/EXT/raster_multisample.txt |
| ''' |
| from OpenGL import platform, constant, arrays |
| from OpenGL import extensions, wrapper |
| import ctypes |
| from OpenGL.raw.GLES2 import _types, _glgets |
| from OpenGL.raw.GLES2.EXT.raster_multisample import * |
| from OpenGL.raw.GLES2.EXT.raster_multisample import _EXTENSION_NAME |
|
|
| def glInitRasterMultisampleEXT(): |
| '''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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| |
