I'd like to enable mesa's floating point buffer support in the Ubuntu packages (accomplished with the --enable-texture-float configure option). This allows mesa to provide additional functionality in the form of the GL_ARB_texture_float¹ and ARB_color_buffer_float² GL extensions.
These are obviously not widely used in Ubuntu currently. As far as I'm aware, the most common user would be Wine, as DirectX provides equivalent functionality. The patent in question is linked to from the GL extension specifications, or can be found at ³. It's not clear to me whether or not enabling this code would actually infringe, as it seems that a hardware rasterisation circuit is integral to the claims. Mesa upstream has been cautious with implementing this support due to this patent, however. [1]: http://www.opengl.org/registry/specs/ARB/texture_float.txt [2]: http://www.opengl.org/registry/specs/ARB/color_buffer_float.txt [3]: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=6,650,327.PN.&OS=PN/6,650,327&RS=PN/6,650,327
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