From 6b53e2b0380ce1617402217cb77d5670a44c3fb5 Mon Sep 17 00:00:00 2001 From: Roland Scheidegger Date: Sat, 1 Jun 2013 20:02:17 +0200 Subject: gallium: add support for layered rendering Since pipe_surface already has all the necessary fields no interface changes are necessary except adding a new shader semantic value (TGSI_SEMANTIC_LAYER). (Note that what GL knows as "gl_Layer" variable d3d10 is naming "RENDER_TARGET_ARRAY_INDEX".) v2: drop cap bit (just tied to geometry shader), add docs. --- src/gallium/docs/source/tgsi.rst | 22 ++++++++++++++++++++-- src/gallium/include/pipe/p_shader_tokens.h | 3 ++- 2 files changed, 22 insertions(+), 3 deletions(-) diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 3af1fb717a2..926527151c4 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -2400,14 +2400,32 @@ Edge flags are used to control which lines or points are actually drawn when the polygon mode converts triangles/quads/polygons into points or lines. + TGSI_SEMANTIC_STENCIL -"""""""""""""""""""""" +""""""""""""""""""""" -For fragment shaders, this semantic label indicates than an output +For fragment shaders, this semantic label indicates that an output 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. +Only the X value 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. +Only the X value is used. (Also known as rendertarget array index.) + + + Declaration Interpolate ^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h index b33cf1d5213..c984d50abe9 100644 --- a/src/gallium/include/pipe/p_shader_tokens.h +++ b/src/gallium/include/pipe/p_shader_tokens.h @@ -165,7 +165,8 @@ struct tgsi_declaration_interp #define TGSI_SEMANTIC_TEXCOORD 19 /**< texture or sprite coordinates */ #define TGSI_SEMANTIC_PCOORD 20 /**< point sprite coordinate */ #define TGSI_SEMANTIC_VIEWPORT_INDEX 21 /**< viewport index */ -#define TGSI_SEMANTIC_COUNT 22 /**< number of semantic values */ +#define TGSI_SEMANTIC_LAYER 22 /**< layer (rendertarget index) */ +#define TGSI_SEMANTIC_COUNT 23 /**< number of semantic values */ struct tgsi_declaration_semantic { -- cgit v1.2.3