src/gallium/docs/source/cso/blend.rst

   1 .. _blend:
   2
   3 Blend
   4 =====
   5
   6 This state controls blending of the final fragments into the target rendering
   7 buffers.
   8
   9 Members
  10 -------
  11
  12 independent_blend_enable
  13    If enabled, blend state is different for each render target, and
  14    for each render target set in the respective member of the rt array.
  15    If disabled, blend state is the same for all render targets, and only
  16    the first member of the rt array contains valid data.
  17 logicop_enable
  18    Enables logic ops. Cannot be enabled at the same time as blending, and
  19    is always the same for all render targets.
  20 logicop_func
  21    The logic operation to use if logic ops are enabled. One of PIPE_LOGICOP.
  22 dither
  23    Whether dithering is enabled.
  24 rt
  25    Contains the per rendertarget blend state.
  26
  27 per rendertarget members
  28 ------------------------
  29
  30 blend_enable
  31    If blending is enabled, perform a blend calculation according to blend
  32    functions and source/destination factors. Otherwise, the incoming fragment
  33    color gets passed unmodified (but colormask still applies).
  34 rgb_func
  35    The blend function to use for rgb channels. One of PIPE_BLEND.
  36 rgb_src_factor
  37    The blend source factor to use for rgb channels. One of PIPE_BLENDFACTOR.
  38 rgb_dst_factor
  39    The blend destination factor to use for rgb channels. One of PIPE_BLENDFACTOR.
  40 alpha_func
  41    The blend function to use for the alpha channel. One of PIPE_BLEND.
  42 alpha_src_factor
  43    The blend source factor to use for the alpha channel. One of PIPE_BLENDFACTOR.
  44 alpha_dst_factor
  45    The blend destination factor to use for alpha channel. One of PIPE_BLENDFACTOR.
  46 colormask
  47    Bitmask of which channels to write. Combination of PIPE_MASK bits.