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Diffstat (limited to 'src/gallium/docs/source/cso/blend.rst')
| -rw-r--r-- | src/gallium/docs/source/cso/blend.rst | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/src/gallium/docs/source/cso/blend.rst b/src/gallium/docs/source/cso/blend.rst index fd9e4a1e2d..55c0f32885 100644 --- a/src/gallium/docs/source/cso/blend.rst +++ b/src/gallium/docs/source/cso/blend.rst @@ -6,9 +6,50 @@ Blend This state controls blending of the final fragments into the target rendering buffers. -XXX it is unresolved what behavior should result if blend_enable is off. +Blend Factors +------------- + +The blend factors largely follow the same pattern as their counterparts +in other modern and legacy drawing APIs. + +XXX blurb about dual-source blends Members ------- -XXX undocumented members +independent_blend_enable + If enabled, blend state is different for each render target, and + for each render target set in the respective member of the rt array. + If disabled, blend state is the same for all render targets, and only + the first member of the rt array contains valid data. +logicop_enable + Enables logic ops. Cannot be enabled at the same time as blending, and + is always the same for all render targets. +logicop_func + The logic operation to use if logic ops are enabled. One of PIPE_LOGICOP. +dither + Whether dithering is enabled. +rt + Contains the per-rendertarget blend state. + +Per-rendertarget Members +------------------------ + +blend_enable + If blending is enabled, perform a blend calculation according to blend + functions and source/destination factors. Otherwise, the incoming fragment + color gets passed unmodified (but colormask still applies). +rgb_func + The blend function to use for rgb channels. One of PIPE_BLEND. +rgb_src_factor + The blend source factor to use for rgb channels. One of PIPE_BLENDFACTOR. +rgb_dst_factor + The blend destination factor to use for rgb channels. One of PIPE_BLENDFACTOR. +alpha_func + The blend function to use for the alpha channel. One of PIPE_BLEND. +alpha_src_factor + The blend source factor to use for the alpha channel. One of PIPE_BLENDFACTOR. +alpha_dst_factor + The blend destination factor to use for alpha channel. One of PIPE_BLENDFACTOR. +colormask + Bitmask of which channels to write. Combination of PIPE_MASK bits. |