diff options
| author | Dave Airlie <[email protected]> | 2011-08-26 10:59:18 +0100 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2011-09-02 10:47:45 +0100 |
| commit | 2083a276eb270b748d1c2668eb9faa5aadc8e700 (patch) | |
| tree | fa03d01ecdba21bab656cf5e9f274ee2b0db7f83 /src/gallium/docs | |
| parent | 49e24d3b8c0129e11fcc94b6e74dc2589d64c882 (diff) | |
tgsi: add support for texture offsets to the TGSI IR. (v2)
This adds tokens for texture offsets, to store 4 * swizzled vec 3
for use in TXF and other opcodes.
It also contains TGSI exec changes for softpipe to use this code,
along with GLSL->TGSI support for TXF.
v2: add some more comments, add back padding I removed.
Signed-off-by: Dave Airlie <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Diffstat (limited to 'src/gallium/docs')
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 039cb1c03d5..5cf08752e75 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -1026,9 +1026,16 @@ XXX so let's discuss it, yeah? dst.w = |src0.w - src1.w| + src2.w -.. opcode:: TXF - Texel Fetch - - TBD +.. opcode:: TXF - Texel Fetch (as per NV_gpu_shader4), extract a single texel + from a specified texture image. The source sampler may + not be a CUBE or SHADOW. + src 0 is a four-component signed integer vector used to + identify the single texel accessed. 3 components + level. + src 1 is a 3 component constant signed integer vector, + with each component only have a range of + -8..+8 (hw only seems to deal with this range, interface + allows for up to unsigned int). + TXF(uint_vec coord, int_vec offset). .. opcode:: TXQ - Texture Size Query (as per NV_gpu_program4) |