gallium: add PIPE_CAP_DRAW_PARAMETERS

This allows the state tracker to know that the various draw parameters
are available in vertex shaders.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

src/gallium/docs/source/screen.rst

@@ -239,8 +239,7 @@ The integer capabilities:
   will need to lower TGSI_SEMANTIC_VERTEXID to TGSI_SEMANTIC_VERTEXID_NOBASE
   and TGSI_SEMANTIC_BASEVERTEX, so drivers setting this must handle both these
   semantics. Only relevant if geometry shaders are supported.
-  (Currently not possible to query availability of these two semantics outside
-  this, at least BASEVERTEX should be exposed separately too).
+  (BASEVERTEX could be exposed separately too via ``PIPE_CAP_DRAW_PARAMETERS``).
 * ``PIPE_CAP_POLYGON_OFFSET_CLAMP``: If true, the driver implements support
   for ``pipe_rasterizer_state::offset_clamp``.
 * ``PIPE_CAP_MULTISAMPLE_Z_RESOLVE``: Whether the driver supports blitting
@@ -283,6 +282,9 @@ The integer capabilities:
   a compressed block is copied to/from a plain pixel of the same size.
 * ``PIPE_CAP_CLEAR_TEXTURE``: Whether `clear_texture` will be
   available in contexts.
+* ``PIPE_CAP_DRAW_PARAMETERS``: Whether ``TGSI_SEMANTIC_BASEVERTEX``,
+  ``TGSI_SEMANTIC_BASEINSTANCE``, and ``TGSI_SEMANTIC_DRAWID`` are
+  supported in vertex shaders.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -238,6 +238,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_SHAREABLE_SHADERS:
 	case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 	case PIPE_CAP_CLEAR_TEXTURE:
+	case PIPE_CAP_DRAW_PARAMETERS:
 		return 0;
 
 	case PIPE_CAP_MAX_VIEWPORTS:

src/gallium/drivers/i915/i915_screen.c

@@ -254,6 +254,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

src/gallium/drivers/ilo/ilo_screen.c

@@ -476,6 +476,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -301,6 +301,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/nouveau/nv30/nv30_screen.c

@@ -174,6 +174,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -217,6 +217,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -206,6 +206,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/r300/r300_screen.c

@@ -200,6 +200,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_SHAREABLE_SHADERS:
         case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
         case PIPE_CAP_CLEAR_TEXTURE:
+        case PIPE_CAP_DRAW_PARAMETERS:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -348,6 +348,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 	case PIPE_CAP_SHAREABLE_SHADERS:
 	case PIPE_CAP_CLEAR_TEXTURE:
+	case PIPE_CAP_DRAW_PARAMETERS:
 		return 0;
 
 	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:

src/gallium/drivers/radeonsi/si_pipe.c

@@ -340,6 +340,7 @@ 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_CLEAR_TEXTURE:
+	case PIPE_CAP_DRAW_PARAMETERS:
 		return 0;
 
 	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:

src/gallium/drivers/softpipe/sp_screen.c

@@ -251,6 +251,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/svga/svga_screen.c

@@ -384,6 +384,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
    }
 

src/gallium/drivers/vc4/vc4_screen.c

@@ -189,6 +189,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_SHAREABLE_SHADERS:
 	case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 	case PIPE_CAP_CLEAR_TEXTURE:
+	case PIPE_CAP_DRAW_PARAMETERS:
                 return 0;
 
                 /* Stream output. */

src/gallium/drivers/virgl/virgl_screen.c

@@ -219,6 +219,7 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
    case PIPE_CAP_SHAREABLE_SHADERS:
    case PIPE_CAP_CLEAR_TEXTURE:
+   case PIPE_CAP_DRAW_PARAMETERS:
       return 0;
    case PIPE_CAP_VENDOR_ID:
       return 0x1af4;

src/gallium/include/pipe/p_defines.h

@@ -635,6 +635,7 @@ enum pipe_cap
    PIPE_CAP_SHAREABLE_SHADERS,
    PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS,
    PIPE_CAP_CLEAR_TEXTURE,
+   PIPE_CAP_DRAW_PARAMETERS,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)