On 08/26/2011 04:50 AM, Dave Airlie wrote:
From: Dave Airlie<[email protected]>
In order to implement the GLSL texelFetchOffset I needed to modify TXF
(which wasn't defined anyways). It now corresponds to the NV_gpu_shader4.
I've limited things to a u8, since hw can only do about 4-5 bits, since
that is what DX specifies, TGSI passes stuff in an immediate so its not a
problem there, if we need to change the tgsi_exec/driver interface later
it isn't a major problem.
With OpenGL you can query the range of supported offsets with
GL_MIN_PROGRAM_TEXEL_OFFSET and GL_MAX_PROGRAM_TEXEL_OFFSET. Maybe we
should add new PIPE_CAP_MIN/MAX_TEXEL_OFFSETS right away...
-Brian
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