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  SSK7  SSKJr  S rg)	a#  OpenGL extension SGIX.texture_scale_bias

This module customises the behaviour of the 
OpenGL.raw.GL.SGIX.texture_scale_bias to provide a more 
Python-friendly API

Overview (from the spec)
        
        This extension adds scale, bias, and clamp to [0, 1] operations to the 
        texture pipeline.
        These operations are applied to the filtered result of a texture lookup,
        before that result is used in the texture environment equations and
        before the texture color lookup table of SGI_texture_color_table, 
        if that extension exists.
        These operations are distinct from the scale, bias, and clamp operations
        that appear in the SGI_color_table extension, which are used to
        define a color lookup table.
        
        Scale and bias operations on texels can be used to better utilize the
        color resolution of a particular texture internal format (see EXT_texture).

The official definition of this extension is available here:
http://www.opengl.org/registry/specs/SGIX/texture_scale_bias.txt
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