[Mesa-dev] [PATCH 1/7] gallium: add pipe_blend_state::srgb_enable and the CAP

Jose Fonseca jfonseca at vmware.com
Mon Jun 12 19:51:38 UTC 2017


How does this help exactly?

Are applications actually rendering to the same FBO w/ and w/o SRGB 
decoding?

Or is the problem here GL_SRGB_WRITE state getting spuriously dirtied by 
the application?

And even if they do, why is toggling surface views in framebuffer state 
so expensive?

I don't object per se, but it looks like an unusual thing to optimize for.

Jose



On 12/06/17 17:56, Marek Olšák wrote:
> From: Marek Olšák <marek.olsak at amd.com>
> 
> This is much faster than updating the whole framebuffer state.
> ---
>   src/gallium/docs/source/cso/blend.rst            | 6 +++++-
>   src/gallium/docs/source/screen.rst               | 2 ++
>   src/gallium/drivers/etnaviv/etnaviv_screen.c     | 1 +
>   src/gallium/drivers/freedreno/freedreno_screen.c | 1 +
>   src/gallium/drivers/i915/i915_screen.c           | 1 +
>   src/gallium/drivers/llvmpipe/lp_screen.c         | 1 +
>   src/gallium/drivers/nouveau/nv30/nv30_screen.c   | 1 +
>   src/gallium/drivers/nouveau/nv50/nv50_screen.c   | 1 +
>   src/gallium/drivers/nouveau/nvc0/nvc0_screen.c   | 1 +
>   src/gallium/drivers/r300/r300_screen.c           | 1 +
>   src/gallium/drivers/r600/r600_pipe.c             | 1 +
>   src/gallium/drivers/radeonsi/si_pipe.c           | 1 +
>   src/gallium/drivers/softpipe/sp_screen.c         | 1 +
>   src/gallium/drivers/svga/svga_screen.c           | 1 +
>   src/gallium/drivers/swr/swr_screen.cpp           | 1 +
>   src/gallium/drivers/vc4/vc4_screen.c             | 1 +
>   src/gallium/drivers/virgl/virgl_screen.c         | 1 +
>   src/gallium/include/pipe/p_defines.h             | 1 +
>   src/gallium/include/pipe/p_state.h               | 1 +
>   19 files changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/src/gallium/docs/source/cso/blend.rst b/src/gallium/docs/source/cso/blend.rst
> index 7316e5c..2c69253 100644
> --- a/src/gallium/docs/source/cso/blend.rst
> +++ b/src/gallium/docs/source/cso/blend.rst
> @@ -92,21 +92,25 @@ alpha_to_coverage
>      If enabled, the fragment's alpha value is used to override the fragment's
>      coverage mask.  The coverage mask will be all zeros if the alpha value is
>      zero.  The coverage mask will be all ones if the alpha value is one.
>      Otherwise, the number of bits set in the coverage mask will be proportional
>      to the alpha value.  Note that this step happens regardless of whether
>      multisample is enabled or the destination buffer is multisampled.
>   alpha_to_one
>      If enabled, the fragment's alpha value will be set to one.  As with
>      alpha_to_coverage, this step happens regardless of whether multisample
>      is enabled or the destination buffer is multisampled.
> -
> +srgb_enable
> +   If PIPE_CAP_BLEND_STATE_SRGB_ENABLE is exposed, the i-th bit is set,
> +   and the i-th color buffer is UNORM and has 8 bits per channel, the color
> +   buffer is forced to sRGB. This has no effect with other formats.
> +   In addition to draw calls, pipe_context::clear is affected too.
>   
>   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.
> diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
> index 288fb5c..acbd1ac 100644
> --- a/src/gallium/docs/source/screen.rst
> +++ b/src/gallium/docs/source/screen.rst
> @@ -387,20 +387,22 @@ The integer capabilities:
>   * ``PIPE_CAP_TGSI_BALLOT``: Whether the BALLOT and READ_* opcodes as well as
>     the SUBGROUP_* semantics are supported.
>   * ``PIPE_CAP_TGSI_TES_LAYER_VIEWPORT``: Whether ``TGSI_SEMANTIC_LAYER`` and
>     ``TGSI_SEMANTIC_VIEWPORT_INDEX`` are supported as tessellation evaluation
>     shader outputs.
>   * ``PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX``: Whether a buffer with just
>     PIPE_BIND_CONSTANT_BUFFER can be legally passed to set_vertex_buffers.
>   * ``PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION``: As the name says.
>   * ``PIPE_CAP_POST_DEPTH_COVERAGE``: whether
>     ``TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE`` is supported.
> +* ``PIPE_CAP_BLEND_STATE_SRGB_ENABLE``: Whether pipe_blend_state::srgb_enable
> +  is implemented.
>   
>   
>   .. _pipe_capf:
>   
>   PIPE_CAPF_*
>   ^^^^^^^^^^^^^^^^
>   
>   The floating-point capabilities are:
>   
>   * ``PIPE_CAPF_MAX_LINE_WIDTH``: The maximum width of a regular line.
> diff --git a/src/gallium/drivers/etnaviv/etnaviv_screen.c b/src/gallium/drivers/etnaviv/etnaviv_screen.c
> index 8fd1184..dadaa04 100644
> --- a/src/gallium/drivers/etnaviv/etnaviv_screen.c
> +++ b/src/gallium/drivers/etnaviv/etnaviv_screen.c
> @@ -250,20 +250,21 @@ etna_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>      case PIPE_CAP_INT64_DIVMOD:
>      case PIPE_CAP_TGSI_TEX_TXF_LZ:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>   
>      /* Stream output. */
>      case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
>      case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
>      case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
>      case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
>         return 0;
>   
>      /* Geometry shader output, unsupported. */
> diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
> index 0bf9e8e..1dffba7 100644
> --- a/src/gallium/drivers/freedreno/freedreno_screen.c
> +++ b/src/gallium/drivers/freedreno/freedreno_screen.c
> @@ -309,20 +309,21 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>   	case PIPE_CAP_INT64_DIVMOD:
>   	case PIPE_CAP_TGSI_TEX_TXF_LZ:
>   	case PIPE_CAP_TGSI_CLOCK:
>   	case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>   	case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>   	case PIPE_CAP_TGSI_BALLOT:
>   	case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>   	case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>   	case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>   	case PIPE_CAP_POST_DEPTH_COVERAGE:
> +	case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>   		return 0;
>   
>   	case PIPE_CAP_MAX_VIEWPORTS:
>   		return 1;
>   
>   	case PIPE_CAP_SHAREABLE_SHADERS:
>   	case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
>   	/* manage the variants for these ourself, to avoid breaking precompile: */
>   	case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
>   	case PIPE_CAP_VERTEX_COLOR_CLAMPED:
> diff --git a/src/gallium/drivers/i915/i915_screen.c b/src/gallium/drivers/i915/i915_screen.c
> index a0dbc12..c41c93c 100644
> --- a/src/gallium/drivers/i915/i915_screen.c
> +++ b/src/gallium/drivers/i915/i915_screen.c
> @@ -271,20 +271,21 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
>      case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
>      case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
>      case PIPE_CAP_CULL_DISTANCE:
>      case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
>      case PIPE_CAP_TGSI_VOTE:
>      case PIPE_CAP_MAX_WINDOW_RECTANGLES:
>      case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
>      case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>   
>      case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
>      case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
>      case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
>      case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
>      case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
>      case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
>      case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
>      case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
> diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
> index 4e8c110..a260aee 100644
> --- a/src/gallium/drivers/llvmpipe/lp_screen.c
> +++ b/src/gallium/drivers/llvmpipe/lp_screen.c
> @@ -348,20 +348,21 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
>      case PIPE_CAP_TGSI_FS_FBFETCH:
>      case PIPE_CAP_TGSI_MUL_ZERO_WINS:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>      }
>      /* should only get here on unhandled cases */
>      debug_printf("Unexpected PIPE_CAP %d query\n", param);
>      return 0;
>   }
>   
>   static int
>   llvmpipe_get_shader_param(struct pipe_screen *screen,
>                             enum pipe_shader_type shader,
> diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
> index 553ee49..5694a23 100644
> --- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
> +++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
> @@ -212,20 +212,21 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>      case PIPE_CAP_INT64:
>      case PIPE_CAP_INT64_DIVMOD:
>      case PIPE_CAP_TGSI_TEX_TXF_LZ:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>   
>      case PIPE_CAP_VENDOR_ID:
>         return 0x10de;
>      case PIPE_CAP_DEVICE_ID: {
>         uint64_t device_id;
>         if (nouveau_getparam(dev, NOUVEAU_GETPARAM_PCI_DEVICE, &device_id)) {
>            NOUVEAU_ERR("NOUVEAU_GETPARAM_PCI_DEVICE failed.\n");
>            return -1;
>         }
> diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
> index 631b2c9..3115d84 100644
> --- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
> +++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
> @@ -264,20 +264,21 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>      case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
>      case PIPE_CAP_TGSI_FS_FBFETCH:
>      case PIPE_CAP_DOUBLES:
>      case PIPE_CAP_INT64:
>      case PIPE_CAP_INT64_DIVMOD:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>   
>      case PIPE_CAP_VENDOR_ID:
>         return 0x10de;
>      case PIPE_CAP_DEVICE_ID: {
>         uint64_t device_id;
>         if (nouveau_getparam(dev, NOUVEAU_GETPARAM_PCI_DEVICE, &device_id)) {
>            NOUVEAU_ERR("NOUVEAU_GETPARAM_PCI_DEVICE failed.\n");
>            return -1;
>         }
> diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> index cf31b6c..715ec25 100644
> --- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> +++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> @@ -293,20 +293,21 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>      case PIPE_CAP_PCI_GROUP:
>      case PIPE_CAP_PCI_BUS:
>      case PIPE_CAP_PCI_DEVICE:
>      case PIPE_CAP_PCI_FUNCTION:
>      case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
>      case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
>      case PIPE_CAP_NATIVE_FENCE_FD:
>      case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
>      case PIPE_CAP_INT64_DIVMOD:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>   
>      case PIPE_CAP_VENDOR_ID:
>         return 0x10de;
>      case PIPE_CAP_DEVICE_ID: {
>         uint64_t device_id;
>         if (nouveau_getparam(dev, NOUVEAU_GETPARAM_PCI_DEVICE, &device_id)) {
>            NOUVEAU_ERR("NOUVEAU_GETPARAM_PCI_DEVICE failed.\n");
>            return -1;
>         }
> diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
> index 346ce05..3e49525 100644
> --- a/src/gallium/drivers/r300/r300_screen.c
> +++ b/src/gallium/drivers/r300/r300_screen.c
> @@ -234,20 +234,21 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
>           case PIPE_CAP_INT64:
>           case PIPE_CAP_INT64_DIVMOD:
>           case PIPE_CAP_TGSI_TEX_TXF_LZ:
>           case PIPE_CAP_TGSI_CLOCK:
>           case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>           case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>           case PIPE_CAP_TGSI_BALLOT:
>           case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>           case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>           case PIPE_CAP_POST_DEPTH_COVERAGE:
> +        case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>               return 0;
>   
>           /* SWTCL-only features. */
>           case PIPE_CAP_PRIMITIVE_RESTART:
>           case PIPE_CAP_USER_VERTEX_BUFFERS:
>           case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
>               return !r300screen->caps.has_tcl;
>   
>           /* HWTCL-only features / limitations. */
>           case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
> diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
> index d4fdccb..1f4bd5c 100644
> --- a/src/gallium/drivers/r600/r600_pipe.c
> +++ b/src/gallium/drivers/r600/r600_pipe.c
> @@ -390,20 +390,21 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
>   	case PIPE_CAP_TGSI_FS_FBFETCH:
>   	case PIPE_CAP_INT64:
>   	case PIPE_CAP_INT64_DIVMOD:
>   	case PIPE_CAP_TGSI_TEX_TXF_LZ:
>   	case PIPE_CAP_TGSI_CLOCK:
>   	case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>   	case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>   	case PIPE_CAP_TGSI_BALLOT:
>   	case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>   	case PIPE_CAP_POST_DEPTH_COVERAGE:
> +	case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>   		return 0;
>   
>   	case PIPE_CAP_DOUBLES:
>   		if (rscreen->b.family == CHIP_ARUBA ||
>   		    rscreen->b.family == CHIP_CAYMAN ||
>   		    rscreen->b.family == CHIP_CYPRESS ||
>   		    rscreen->b.family == CHIP_HEMLOCK)
>   			return 1;
>   		return 0;
>   
> diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
> index cb37226..538c8e8 100644
> --- a/src/gallium/drivers/radeonsi/si_pipe.c
> +++ b/src/gallium/drivers/radeonsi/si_pipe.c
> @@ -530,20 +530,21 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
>   	case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
>   	case PIPE_CAP_VERTEXID_NOBASE:
>   	case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
>   	case PIPE_CAP_MAX_WINDOW_RECTANGLES:
>   	case PIPE_CAP_NATIVE_FENCE_FD:
>   	case PIPE_CAP_TGSI_FS_FBFETCH:
>   	case PIPE_CAP_TGSI_MUL_ZERO_WINS:
>   	case PIPE_CAP_UMA:
>   	case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>   	case PIPE_CAP_POST_DEPTH_COVERAGE:
> +	case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>   		return 0;
>   
>   	case PIPE_CAP_QUERY_BUFFER_OBJECT:
>   		return si_have_tgsi_compute(sscreen);
>   
>   	case PIPE_CAP_DRAW_PARAMETERS:
>   	case PIPE_CAP_MULTI_DRAW_INDIRECT:
>   	case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
>   		return sscreen->has_draw_indirect_multi;
>   
> diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
> index de26494..a7454be 100644
> --- a/src/gallium/drivers/softpipe/sp_screen.c
> +++ b/src/gallium/drivers/softpipe/sp_screen.c
> @@ -298,20 +298,21 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
>      case PIPE_CAP_TGSI_FS_FBFETCH:
>      case PIPE_CAP_TGSI_MUL_ZERO_WINS:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>      case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
>         return 4;
>      }
>      /* should only get here on unhandled cases */
>      debug_printf("Unexpected PIPE_CAP %d query\n", param);
>      return 0;
>   }
>   
>   static int
> diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
> index 5ffb6c8..65c3cdb 100644
> --- a/src/gallium/drivers/svga/svga_screen.c
> +++ b/src/gallium/drivers/svga/svga_screen.c
> @@ -437,20 +437,21 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
>      case PIPE_CAP_INT64_DIVMOD:
>      case PIPE_CAP_TGSI_TEX_TXF_LZ:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>      }
>   
>      debug_printf("Unexpected PIPE_CAP_ query %u\n", param);
>      return 0;
>   }
>   
>   
>   static int
>   vgpu9_get_shader_param(struct pipe_screen *screen,
> diff --git a/src/gallium/drivers/swr/swr_screen.cpp b/src/gallium/drivers/swr/swr_screen.cpp
> index 7931d19..d0d635e 100644
> --- a/src/gallium/drivers/swr/swr_screen.cpp
> +++ b/src/gallium/drivers/swr/swr_screen.cpp
> @@ -333,20 +333,21 @@ swr_get_param(struct pipe_screen *screen, enum pipe_cap param)
>      case PIPE_CAP_INT64_DIVMOD:
>      case PIPE_CAP_TGSI_TEX_TXF_LZ:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>   
>      case PIPE_CAP_VENDOR_ID:
>         return 0xFFFFFFFF;
>      case PIPE_CAP_DEVICE_ID:
>         return 0xFFFFFFFF;
>      case PIPE_CAP_ACCELERATED:
>         return 0;
>      case PIPE_CAP_VIDEO_MEMORY: {
>         /* XXX: Do we want to return the full amount of system memory ? */
> diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
> index 1f66d4c..c40080a 100644
> --- a/src/gallium/drivers/vc4/vc4_screen.c
> +++ b/src/gallium/drivers/vc4/vc4_screen.c
> @@ -249,20 +249,21 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>           case PIPE_CAP_INT64_DIVMOD:
>           case PIPE_CAP_TGSI_TEX_TXF_LZ:
>           case PIPE_CAP_TGSI_CLOCK:
>           case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>           case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>           case PIPE_CAP_TGSI_BALLOT:
>           case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>   	case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>   	case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>           case PIPE_CAP_POST_DEPTH_COVERAGE:
> +	case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>                   return 0;
>   
>                   /* Stream output. */
>           case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
>           case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
>           case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
>           case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
>           case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
>                   return 0;
>   
> diff --git a/src/gallium/drivers/virgl/virgl_screen.c b/src/gallium/drivers/virgl/virgl_screen.c
> index 456381e..78d8974 100644
> --- a/src/gallium/drivers/virgl/virgl_screen.c
> +++ b/src/gallium/drivers/virgl/virgl_screen.c
> @@ -257,20 +257,21 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
>      case PIPE_CAP_TGSI_TEX_TXF_LZ:
>      case PIPE_CAP_TGSI_CLOCK:
>      case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
>      case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
>      case PIPE_CAP_TGSI_BALLOT:
>      case PIPE_CAP_DOUBLES:
>      case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
>      case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
>      case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
>      case PIPE_CAP_POST_DEPTH_COVERAGE:
> +   case PIPE_CAP_BLEND_STATE_SRGB_ENABLE:
>         return 0;
>      case PIPE_CAP_VENDOR_ID:
>         return 0x1af4;
>      case PIPE_CAP_DEVICE_ID:
>         return 0x1010;
>      case PIPE_CAP_ACCELERATED:
>         return 1;
>      case PIPE_CAP_UMA:
>      case PIPE_CAP_VIDEO_MEMORY:
>         return 0;
> diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
> index c02bbdb..576440d 100644
> --- a/src/gallium/include/pipe/p_defines.h
> +++ b/src/gallium/include/pipe/p_defines.h
> @@ -766,20 +766,21 @@ enum pipe_cap
>      PIPE_CAP_INT64_DIVMOD,
>      PIPE_CAP_TGSI_TEX_TXF_LZ,
>      PIPE_CAP_TGSI_CLOCK,
>      PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE,
>      PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE,
>      PIPE_CAP_TGSI_BALLOT,
>      PIPE_CAP_TGSI_TES_LAYER_VIEWPORT,
>      PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX,
>      PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION,
>      PIPE_CAP_POST_DEPTH_COVERAGE,
> +   PIPE_CAP_BLEND_STATE_SRGB_ENABLE,
>   };
>   
>   #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)
>   #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600 (1 << 1)
>   
>   enum pipe_endian
>   {
>      PIPE_ENDIAN_LITTLE = 0,
>      PIPE_ENDIAN_BIG = 1,
>   #if defined(PIPE_ARCH_LITTLE_ENDIAN)
> diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
> index 15be8cb..a585c59 100644
> --- a/src/gallium/include/pipe/p_state.h
> +++ b/src/gallium/include/pipe/p_state.h
> @@ -324,20 +324,21 @@ struct pipe_rt_blend_state
>   
>   
>   struct pipe_blend_state
>   {
>      unsigned independent_blend_enable:1;
>      unsigned logicop_enable:1;
>      unsigned logicop_func:4;      /**< PIPE_LOGICOP_x */
>      unsigned dither:1;
>      unsigned alpha_to_coverage:1;
>      unsigned alpha_to_one:1;
> +   unsigned srgb_enable:PIPE_MAX_COLOR_BUFS;
>      struct pipe_rt_blend_state rt[PIPE_MAX_COLOR_BUFS];
>   };
>   
>   
>   struct pipe_blend_color
>   {
>      float color[4];
>   };
>   
>   
> 



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