gallium: add support for AMD_vertex_shader_layer

src/gallium/docs/source/screen.rst

@@ -176,6 +176,8 @@ The integer capabilities:
 * ``PIPE_CAP_MIXED_FRAMEBUFFER_SIZES``: Whether it is allowed to have
   different sizes for fb color/zs attachments. This controls whether
   ARB_framebuffer_object is provided.
+* ``PIPE_CAP_TGSI_VS_LAYER``: Whether TGSI_SEMANTIC_LAYER is supported
+  as a vertex shader output.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -197,6 +197,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_USER_INDEX_BUFFERS:
 	case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 	case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
+        case PIPE_CAP_TGSI_VS_LAYER:
 		return 0;
 
 	/* Stream output. */

src/gallium/drivers/i915/i915_screen.c

@@ -222,6 +222,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    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:
        return 0;
 
    case PIPE_CAP_GLSL_FEATURE_LEVEL:

src/gallium/drivers/ilo/ilo_screen.c

@@ -431,6 +431,8 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return PIPE_ENDIAN_LITTLE;
    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
       return true;
+   case PIPE_CAP_TGSI_VS_LAYER:
+      return 0;
 
    default:
       return 0;

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -234,6 +234,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return PIPE_MAX_VIEWPORTS;
    case PIPE_CAP_ENDIANNESS:
       return PIPE_ENDIAN_NATIVE;
+   case PIPE_CAP_TGSI_VS_LAYER:
+      return 0;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);

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

@@ -126,6 +126,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
+   case PIPE_CAP_TGSI_VS_LAYER:
       return 0;
    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:

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

@@ -194,6 +194,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50;
    case PIPE_CAP_ENDIANNESS:
       return PIPE_ENDIAN_LITTLE;
+   case PIPE_CAP_TGSI_VS_LAYER:
+      return 0;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);
       return 0;

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

@@ -172,6 +172,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50;
    case PIPE_CAP_ENDIANNESS:
       return PIPE_ENDIAN_LITTLE;
+   case PIPE_CAP_TGSI_VS_LAYER:
+      return 0;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);
       return 0;

src/gallium/drivers/r300/r300_screen.c

@@ -164,6 +164,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
         case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
         case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
+        case PIPE_CAP_TGSI_VS_LAYER:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -464,6 +464,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 	case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 	case PIPE_CAP_USER_VERTEX_BUFFERS:
+	case PIPE_CAP_TGSI_VS_LAYER:
 		return 0;
 
 	/* Stream output. */

src/gallium/drivers/radeonsi/radeonsi_pipe.c

@@ -330,6 +330,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_TGSI_INSTANCEID:
 	case PIPE_CAP_COMPUTE:
 	case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
+        case PIPE_CAP_TGSI_VS_LAYER:
 		return 1;
 
 	case PIPE_CAP_TEXTURE_MULTISAMPLE:

src/gallium/drivers/softpipe/sp_screen.c

@@ -186,6 +186,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_ENDIANNESS:
       return PIPE_ENDIAN_NATIVE;
+   case PIPE_CAP_TGSI_VS_LAYER:
+      return 0;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);

src/gallium/drivers/svga/svga_screen.c

@@ -267,6 +267,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
+   case PIPE_CAP_TGSI_VS_LAYER:
       return 0;
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
       return 1;

src/gallium/include/pipe/p_defines.h

@@ -513,7 +513,8 @@ enum pipe_cap {
    PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE = 83,
    PIPE_CAP_MAX_VIEWPORTS = 84,
    PIPE_CAP_ENDIANNESS = 85,
-   PIPE_CAP_MIXED_FRAMEBUFFER_SIZES = 86
+   PIPE_CAP_MIXED_FRAMEBUFFER_SIZES = 86,
+   PIPE_CAP_TGSI_VS_LAYER = 87
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)

src/mesa/state_tracker/st_extensions.c

@@ -605,6 +605,13 @@ void st_init_extensions(struct st_context *st)
       ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
    }
 
+   /* This extension needs full OpenGL 3.2, but we don't know if that's
+    * supported at this point. Only check the GLSL version. */
+   if (ctx->Const.GLSLVersion >= 150 &&
+       screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER)) {
+      ctx->Extensions.AMD_vertex_shader_layer = GL_TRUE;
+   }
+
    if (ctx->Const.GLSLVersion >= 130) {
       ctx->Const.NativeIntegers = GL_TRUE;
       ctx->Const.MaxClipPlanes = 8;

src/mesa/state_tracker/st_program.c

@@ -258,6 +258,10 @@ st_prepare_vertex_program(struct gl_context *ctx,
             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_CLIPVERTEX;
             stvp->output_semantic_index[slot] = 0;
             break;
+         case VARYING_SLOT_LAYER:
+            stvp->output_semantic_name[slot] = TGSI_SEMANTIC_LAYER;
+            stvp->output_semantic_index[slot] = 0;
+            break;
 
          case VARYING_SLOT_TEX0:
          case VARYING_SLOT_TEX1: