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]>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_atom_rasterizer.c b/src/mesa/state_tracker/st_atom_rasterizer.c
index 39be6b15a70..4147340fd79 100644
--- a/src/mesa/state_tracker/st_atom_rasterizer.c
+++ b/src/mesa/state_tracker/st_atom_rasterizer.c
@@ -277,6 +277,11 @@ void st_update_rasterizer( struct st_context *st )
 
    /* ST_NEW_RASTERIZER */
    raster->rasterizer_discard = ctx->RasterDiscard;
+   if (ctx->TileRasterOrderFixed) {
+      raster->tile_raster_order_fixed = true;
+      raster->tile_raster_order_increasing_x = ctx->TileRasterOrderIncreasingX;
+      raster->tile_raster_order_increasing_y = ctx->TileRasterOrderIncreasingY;
+   }
 
    if (st->edgeflag_culls_prims) {
       /* All edge flags are FALSE. Cull the affected faces. */