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'''OpenGL extension ATI.fragment_shader |
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This module customises the behaviour of the |
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OpenGL.raw.GL.ATI.fragment_shader to provide a more |
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Python-friendly API |
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Overview (from the spec) |
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This extension exposes a powerful fragment shading model which |
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provides a very general means of expressing fragment color blending |
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and dependent texture address modification. The programming is |
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a register-based model in which there is a fixed number of |
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instructions, texture lookups, read/write registers, and constants. |
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The fragment shader extension provides a unified instruction set |
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for operating on address or color data and eliminates the |
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distinction between the two. This extension provides all the |
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interfaces necessary to fully expose this programmable fragment |
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shader in GL. |
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Although conceived as a device-independent extension which would |
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expose the capabilities of future generations of hardware, changing |
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trends in programmable hardware have affected the lifespan of this |
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extension. For this reason you will now find a fixed set of |
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features and resources exposed, and the queries to determine this |
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set have been deprecated. |
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The official definition of this extension is available here: |
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http://www.opengl.org/registry/specs/ATI/fragment_shader.txt |
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''' |
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from OpenGL import platform, constant, arrays |
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from OpenGL import extensions, wrapper |
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import ctypes |
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from OpenGL.raw.GL import _types, _glgets |
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from OpenGL.raw.GL.ATI.fragment_shader import * |
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from OpenGL.raw.GL.ATI.fragment_shader import _EXTENSION_NAME |
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def glInitFragmentShaderATI(): |
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'''Return boolean indicating whether this extension is available''' |
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from OpenGL import extensions |
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return extensions.hasGLExtension( _EXTENSION_NAME ) |
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glSetFragmentShaderConstantATI=wrapper.wrapper(glSetFragmentShaderConstantATI).setInputArraySize( |
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'value', 4 |
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) |
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