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Mon Nov 14 09:12:11 PST 2011

correct interpolation between the border color and the texel color when sampling with coordinates in the range [0; 1/2N[ or
[1-1/2N; max[. That's why I converted the coordinates to [-1;size] instead. get_texel_*d functions handle the case when a texture
coordinate is out-of-range but it may not the case of all functions so I probably need to check that carefully.
Please correct me if I misunderstood something.

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