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| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index f77702aa6a9..89ca172080e 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -2965,6 +2965,18 @@ resource can be one of BUFFER, 1D, 2D, 3D, 1DArray and 2DArray. type must be 1 or 4 entries (if specifying on a per-component level) out of UNORM, SNORM, SINT, UINT and FLOAT. +For TEX\* style texture sample opcodes (as opposed to SAMPLE\* opcodes +which take an explicit SVIEW[#] source register), there may be optionally +SVIEW[#] declarations. In this case, the SVIEW index is implied by the +SAMP index, and there must be a corresponding SVIEW[#] declaration for +each SAMP[#] declaration. Drivers are free to ignore this if they wish. +But note in particular that some drivers need to know the sampler type +(float/int/unsigned) in order to generate the correct code, so cases +where integer textures are sampled, SVIEW[#] declarations should be +used. + +NOTE: It is NOT legal to mix SAMPLE\* style opcodes and TEX\* opcodes +in the same shader. Declaration Resource ^^^^^^^^^^^^^^^^^^^^ |