gallium: add PIPE_CAP_TGSI_ARRAY_COMPONENTS

This is a screen cap because drivers are expected to support it either
for all shader types or for none of them.

Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/gallium/docs/source/screen.rst

@@ -353,6 +353,14 @@ The integer capabilities:
   32-bit. If set to off, that means that a B5G6R5 + Z24 or RGBA8 + Z16
   combination will require a driver fallback, and should not be
   advertised in the GLX/EGL config list.
+* ``PIPE_CAP_TGSI_ARRAY_COMPONENTS``: If true, the driver interprets the
+  UsageMask of input and output declarations and allows declaring arrays
+  in overlapping ranges. The components must be a contiguous range, e.g. a
+  UsageMask of  xy or yzw is allowed, but xz or yw isn't. Declarations with
+  overlapping locations must have matching semantic names and indices, and
+  equal interpolation qualifiers.
+  Components may overlap, notably when the gaps in an array of dvec3 are
+  filled in.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -287,6 +287,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 	case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 	case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+	case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 		return 0;
 
 	case PIPE_CAP_MAX_VIEWPORTS:

src/gallium/drivers/i915/i915_screen.c

@@ -277,6 +277,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_TGSI_VOTE:
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

src/gallium/drivers/ilo/ilo_screen.c

@@ -515,6 +515,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -336,6 +336,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
    }
    /* should only get here on unhandled cases */

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

@@ -201,6 +201,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

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

@@ -253,6 +253,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_VOTE:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

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

@@ -272,6 +272,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_PCI_DEVICE:
    case PIPE_CAP_PCI_FUNCTION:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/r300/r300_screen.c

@@ -223,6 +223,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_MAX_WINDOW_RECTANGLES:
         case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
         case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+        case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -373,6 +373,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 	case PIPE_CAP_TGSI_VOTE:
 	case PIPE_CAP_MAX_WINDOW_RECTANGLES:
+	case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 		return 0;
 
 	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:

src/gallium/drivers/radeonsi/si_pipe.c

@@ -458,6 +458,7 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 	case PIPE_CAP_TGSI_VOTE:
 	case PIPE_CAP_MAX_WINDOW_RECTANGLES:
+	case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 		return 0;
 
 	case PIPE_CAP_QUERY_BUFFER_OBJECT:

src/gallium/drivers/softpipe/sp_screen.c

@@ -286,6 +286,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
       return 4;

src/gallium/drivers/svga/svga_screen.c

@@ -417,6 +417,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
    }
 

src/gallium/drivers/swr/swr_screen.cpp

@@ -367,6 +367,7 @@ swr_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
    }
 

src/gallium/drivers/vc4/vc4_screen.c

@@ -238,6 +238,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_MAX_WINDOW_RECTANGLES:
         case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
         case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+        case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
                 return 0;
 
                 /* Stream output. */

src/gallium/drivers/virgl/virgl_screen.c

@@ -248,6 +248,7 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
       return 0;
    case PIPE_CAP_VENDOR_ID:
       return 0x1af4;

src/gallium/include/pipe/p_defines.h

@@ -737,6 +737,7 @@ enum pipe_cap
    PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED,
    PIPE_CAP_VIEWPORT_SUBPIXEL_BITS,
    PIPE_CAP_MIXED_COLOR_DEPTH_BITS,
+   PIPE_CAP_TGSI_ARRAY_COMPONENTS,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)