mesa: Implement a new GL_MESA_tile_raster_order extension.

The intent is to use this extension on vc4 to allow X11 to do overlapping
CopyArea() within a pixmap without first blitting the pixmap to a
temporary.  With associated glamor patches, improves x11perf
-copywinwin100 performance on a Raspberry Pi 3 from ~4700/sec to
~5130/sec, and is an even larger boost to uncomposited window movement
performance (most copywinwin100 copies don't overlap).

v2: Fix glIsEnabled() on the new enums.
v3: Drop the local spec since I'm upstreaming the spec.

Reviewed-by: Nicolai Hähnle <[email protected]>

4 files changed, 55 insertions, 0 deletions

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 676103d4778..6d24b93c192 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -867,6 +867,8 @@ init_attrib_groups(struct gl_context *ctx)
       return GL_FALSE;
 
    /* Miscellaneous */
+   ctx->TileRasterOrderIncreasingX = GL_TRUE;
+   ctx->TileRasterOrderIncreasingY = GL_TRUE;
    ctx->NewState = _NEW_ALL;
    ctx->NewDriverState = ~0;
    ctx->ErrorValue = GL_NO_ERROR;
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 2e5fb009314..8e99f2504f1 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -1040,6 +1040,33 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
          }
          break;
 
+      case GL_TILE_RASTER_ORDER_FIXED_MESA:
+         CHECK_EXTENSION(MESA_tile_raster_order, cap);
+         if (ctx->TileRasterOrderFixed != state) {
+            FLUSH_VERTICES(ctx, 0);
+            ctx->NewDriverState |= ctx->DriverFlags.NewTileRasterOrder;
+            ctx->TileRasterOrderFixed = state;
+         }
+         break;
+
+      case GL_TILE_RASTER_ORDER_INCREASING_X_MESA:
+         CHECK_EXTENSION(MESA_tile_raster_order, cap);
+         if (ctx->TileRasterOrderIncreasingX != state) {
+            FLUSH_VERTICES(ctx, 0);
+            ctx->NewDriverState |= ctx->DriverFlags.NewTileRasterOrder;
+            ctx->TileRasterOrderIncreasingX = state;
+         }
+         break;
+
+      case GL_TILE_RASTER_ORDER_INCREASING_Y_MESA:
+         CHECK_EXTENSION(MESA_tile_raster_order, cap);
+         if (ctx->TileRasterOrderIncreasingY != state) {
+            FLUSH_VERTICES(ctx, 0);
+            ctx->NewDriverState |= ctx->DriverFlags.NewTileRasterOrder;
+            ctx->TileRasterOrderIncreasingY = state;
+         }
+         break;
+
       /* GL 3.1 primitive restart.  Note: this enum is different from
        * GL_PRIMITIVE_RESTART_NV (which is client state).
        */
@@ -1716,6 +1743,18 @@ _mesa_IsEnabled( GLenum cap )
          CHECK_EXTENSION(INTEL_conservative_rasterization);
          return ctx->IntelConservativeRasterization;
 
+      case GL_TILE_RASTER_ORDER_FIXED_MESA:
+         CHECK_EXTENSION(MESA_tile_raster_order);
+         return ctx->TileRasterOrderFixed;
+
+      case GL_TILE_RASTER_ORDER_INCREASING_X_MESA:
+         CHECK_EXTENSION(MESA_tile_raster_order);
+         return ctx->TileRasterOrderIncreasingX;
+
+      case GL_TILE_RASTER_ORDER_INCREASING_Y_MESA:
+         CHECK_EXTENSION(MESA_tile_raster_order);
+         return ctx->TileRasterOrderIncreasingY;
+
       default:
          goto invalid_enum_error;
    }
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index c1c39f9a16d..a8dab772341 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -314,6 +314,7 @@ EXT(KHR_texture_compression_astc_hdr        , KHR_texture_compression_astc_hdr
 EXT(KHR_texture_compression_astc_ldr        , KHR_texture_compression_astc_ldr       , GLL, GLC,  x , ES2, 2012)
 EXT(KHR_texture_compression_astc_sliced_3d  , KHR_texture_compression_astc_sliced_3d , GLL, GLC,  x , ES2, 2015)
 
+EXT(MESA_tile_raster_order                  , MESA_tile_raster_order                 , GLL, GLC,  x , ES2, 2017)
 EXT(MESA_pack_invert                        , MESA_pack_invert                       , GLL, GLC,  x ,  x , 2002)
 EXT(MESA_shader_integer_functions           , MESA_shader_integer_functions          , GLL, GLC,  x ,  30, 2016)
 EXT(MESA_texture_signed_rgba                , EXT_texture_snorm                      , GLL, GLC,  x ,  x , 2009)
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 455e7514ab9..ea62d0bfb71 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -4186,6 +4186,7 @@ struct gl_extensions
    GLboolean KHR_texture_compression_astc_hdr;
    GLboolean KHR_texture_compression_astc_ldr;
    GLboolean KHR_texture_compression_astc_sliced_3d;
+   GLboolean MESA_tile_raster_order;
    GLboolean MESA_pack_invert;
    GLboolean MESA_shader_framebuffer_fetch;
    GLboolean MESA_shader_framebuffer_fetch_non_coherent;
@@ -4437,6 +4438,9 @@ struct gl_driver_flags
    /** gl_context::RasterDiscard */
    uint64_t NewRasterizerDiscard;
 
+   /** gl_context::TileRasterOrder* */
+   uint64_t NewTileRasterOrder;
+
    /**
     * gl_context::UniformBufferBindings
     * gl_shader_program::UniformBlocks
@@ -4984,6 +4988,15 @@ struct gl_context
    bool _AttribZeroAliasesVertex;
 
    /**
+    * When set, TileRasterOrderIncreasingX/Y control the order that a tiled
+    * renderer's tiles should be excecuted, to meet the requirements of
+    * GL_MESA_tile_raster_order.
+    */
+   GLboolean TileRasterOrderFixed;
+   GLboolean TileRasterOrderIncreasingX;
+   GLboolean TileRasterOrderIncreasingY;
+
+   /**
     * \name Hooks for module contexts.  
     *
     * These will eventually live in the driver or elsewhere.