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done with fragment programs nowadays.
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fallback) yet. May cause a tcl fallback if fog coord is used together with separate specular lighting. Fog factors are precomputed and then submitted instead of the raw coords (chip limitation, same as on r200).
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generates vfmt fallback). Code by Andreas Stenglein, some small adjustments by me.
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texture sampling and texture environment, optimize away texture sampling for units if the result is not used, always emit the env instructions in-order and try to eliminate GL_REPLACE env instructions.
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