This is trying to port pipe_transfer into gallium-mesa-7.4 branch in order to speed up glreadpixels. In the case video memory is in non-linear layout, calling get_tex_surface will result in a whole buffer data conversion no matter glreadpixels only wants data in a sub-rect.
Not sure if anyone else is using this branch. Welcome any comments. Regards, Yu (Alex) Dai
gallium-mesa-7.4-with-tex-transfer.patch
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