Merge commit 'origin/perrtblend'

Conflicts:
	src/gallium/drivers/softpipe/sp_screen.c
	src/gallium/include/pipe/p_defines.h

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

@@ -6,9 +6,42 @@ 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.
-
 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.

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

@@ -12,8 +12,6 @@ with the traditional (S, T, R, Q) notation.
 Members
 -------
 
-XXX undocumented compare_mode, compare_func
-
 wrap_s
     How to wrap the S coordinate. One of PIPE_TEX_WRAP.
 wrap_t
@@ -27,12 +25,18 @@ min_mip_filter
     PIPE_TEX_FILTER.
 mag_img_filter
     The filter to use when magnifying texels. One of PIPE_TEX_FILTER.
+compare_mode
+    If set to PIPE_TEX_COMPARE_R_TO_TEXTURE, texture output is computed
+    according to compare_func, using r coord and the texture value as operands.
+    If set to PIPE_TEX_COMPARE_NONE, no comparison calculation is performed.
+compare_func
+    How the comparison is computed. One of PIPE_FUNC.
 normalized_coords
     Whether the texture coordinates are normalized. If normalized, they will
     always be in [0, 1]. If not, they will be in the range of each dimension
     of the loaded texture.
 prefilter
-    XXX From the Doxy, "weird sampling state exposed by some APIs." Refine.
+    Cylindrical texcoord wrap enable per coord. Not exposed by most APIs.
 lod_bias
     The bias to apply to the level of detail.
 min_lod