4 files changed, 48 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/xa/xa_composite.c b/src/gallium/state_trackers/xa/xa_composite.c
index b65f6eb09aa..7ae35a160e5 100644
--- a/src/gallium/state_trackers/xa/xa_composite.c
+++ b/src/gallium/state_trackers/xa/xa_composite.c
@@ -512,6 +512,8 @@ xa_composite_rect(struct xa_context *ctx,
 	const float *src_matrix = NULL;
 	const float *mask_matrix = NULL;
 
+	xa_scissor_update(ctx, dstX, dstY, dstX + width, dstY + height);
+
 	if (comp->src->has_transform)
 	    src_matrix = comp->src->transform;
 	if (comp->mask && comp->mask->has_transform)
diff --git a/src/gallium/state_trackers/xa/xa_context.c b/src/gallium/state_trackers/xa/xa_context.c
index ee326762e42..867999a911b 100644
--- a/src/gallium/state_trackers/xa/xa_context.c
+++ b/src/gallium/state_trackers/xa/xa_context.c
@@ -238,6 +238,8 @@ xa_copy(struct xa_context *ctx,
 {
     struct pipe_box src_box;
 
+    xa_scissor_update(ctx, dx, dy, dx + width, dy + height);
+
     if (ctx->simple_copy) {
 	u_box_2d(sx, sy, width, height, &src_box);
 	ctx->pipe->resource_copy_region(ctx->pipe,
@@ -324,6 +326,7 @@ xa_solid_prepare(struct xa_context *ctx, struct xa_surface *dst,
 XA_EXPORT void
 xa_solid(struct xa_context *ctx, int x, int y, int width, int height)
 {
+    xa_scissor_update(ctx, x, y, x + width, y + height);
     renderer_solid(ctx, x, y, x + width, y + height, ctx->solid_color);
 }
 
diff --git a/src/gallium/state_trackers/xa/xa_priv.h b/src/gallium/state_trackers/xa/xa_priv.h
index 8b96bf56417..b67337995a8 100644
--- a/src/gallium/state_trackers/xa/xa_priv.h
+++ b/src/gallium/state_trackers/xa/xa_priv.h
@@ -38,6 +38,8 @@
 #include "pipe/p_context.h"
 #include "pipe/p_state.h"
 
+#include "util/u_math.h"
+
 #if defined(__GNUC__) && __GNUC__ >= 4
 #define XA_EXPORT __attribute__ ((visibility("default")))
 #else
@@ -105,6 +107,12 @@ struct xa_context {
     struct xa_surface *dst;
     struct pipe_surface *srf;
 
+    /* destination scissor state.. we scissor out untouched parts
+     * of the dst for the benefit of tilers:
+     */
+    struct pipe_scissor_state scissor;
+    int scissor_valid;
+
     int simple_copy;
 
     int has_solid_color;
@@ -115,6 +123,27 @@ struct xa_context {
     const struct xa_composite *comp;
 };
 
+static INLINE void
+xa_scissor_reset(struct xa_context *ctx)
+{
+    ctx->scissor.maxx = 0;
+    ctx->scissor.maxy = 0;
+    ctx->scissor.minx = ~0;
+    ctx->scissor.miny = ~0;
+    ctx->scissor_valid = FALSE;
+}
+
+static INLINE void
+xa_scissor_update(struct xa_context *ctx, unsigned minx, unsigned miny,
+		unsigned maxx, unsigned maxy)
+{
+    ctx->scissor.maxx = MAX2(ctx->scissor.maxx, maxx);
+    ctx->scissor.maxy = MAX2(ctx->scissor.maxy, maxy);
+    ctx->scissor.minx = MIN2(ctx->scissor.minx, minx);
+    ctx->scissor.miny = MIN2(ctx->scissor.miny, miny);
+    ctx->scissor_valid = TRUE;
+}
+
 enum xa_vs_traits {
     VS_COMPOSITE = 1 << 0,
     VS_MASK = 1 << 1,
diff --git a/src/gallium/state_trackers/xa/xa_renderer.c b/src/gallium/state_trackers/xa/xa_renderer.c
index 33ae133dacb..121d8ed3b9b 100644
--- a/src/gallium/state_trackers/xa/xa_renderer.c
+++ b/src/gallium/state_trackers/xa/xa_renderer.c
@@ -79,11 +79,22 @@ renderer_draw(struct xa_context *r)
     if (!r->buffer_size)
 	return;
 
+    if (!r->scissor_valid) {
+	r->scissor.minx = 0;
+	r->scissor.miny = 0;
+	r->scissor.maxx = r->dst->tex->width0;
+	r->scissor.maxy = r->dst->tex->height0;
+    }
+
+    r->pipe->set_scissor_states(r->pipe, 0, 1, &r->scissor);
+
     cso_set_vertex_elements(r->cso, r->attrs_per_vertex, r->velems);
     util_draw_user_vertex_buffer(r->cso, r->buffer, PIPE_PRIM_QUADS,
                                  num_verts,	/* verts */
                                  r->attrs_per_vertex);	/* attribs/vert */
     r->buffer_size = 0;
+
+    xa_scissor_reset(r);
 }
 
 static INLINE void
@@ -111,6 +122,7 @@ renderer_init_state(struct xa_context *r)
     raster.half_pixel_center = 1;
     raster.bottom_edge_rule = 1;
     raster.depth_clip = 1;
+    raster.scissor = 1;
     cso_set_rasterizer(r->cso, &raster);
 
     /* vertex elements state */
@@ -333,6 +345,8 @@ renderer_bind_destination(struct xa_context *r,
     struct pipe_framebuffer_state fb;
     struct pipe_viewport_state viewport;
 
+    xa_scissor_reset(r);
+
     /* Framebuffer uses actual surface width/height
      */
     memset(&fb, 0, sizeof fb);