From: Nicolai Hähnle <nicolai.haeh...@amd.com> Depending on pipe caps they can be writable in all vertex processing stages, but only the output of the last stage counts. --- src/gallium/docs/source/tgsi.rst | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index f68d349..6ba37aa 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -3203,29 +3203,39 @@ is a writable stencil reference value. Only the Y component is writable. This allows the fragment shader to change the fragments stencilref value. TGSI_SEMANTIC_VIEWPORT_INDEX """""""""""""""""""""""""""" For geometry shaders, this semantic label indicates that an output contains the index of the viewport (and scissor) to use. This is an integer value, and only the X component is used. +If PIPE_CAP_TGSI_VS_LAYER_VIEWPORT or PIPE_CAP_TGSI_TES_LAYER_VIEWPORT is +supported, then this semantic label can also be used in vertex or +tessellation evaluation shaders, respectively. Only the value written in the +last vertex processing stage is used. + TGSI_SEMANTIC_LAYER """"""""""""""""""" For geometry shaders, this semantic label indicates that an output contains the layer value to use for the color and depth/stencil surfaces. This is an integer value, and only the X component is used. (Also known as rendertarget array index.) +If PIPE_CAP_TGSI_VS_LAYER_VIEWPORT or PIPE_CAP_TGSI_TES_LAYER_VIEWPORT is +supported, then this semantic label can also be used in vertex or +tessellation evaluation shaders, respectively. Only the value written in the +last vertex processing stage is used. + TGSI_SEMANTIC_CULLDIST """""""""""""""""""""" Used as distance to plane for performing application-defined culling of individual primitives against a plane. When components of vertex elements are given this label, these values are assumed to be a float32 signed distance to a plane. Primitives will be completely discarded if the plane distance for all of the vertices in the primitive are < 0. If a vertex has a cull distance of NaN, that -- 2.9.3 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
