2 files changed, 72 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 5ceadb4d3e5..a6bba8f0a94 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -27,6 +27,7 @@
 #include "r600_pipe_common.h"
 #include "r600_cs.h"
 #include "tgsi/tgsi_parse.h"
+#include "util/u_draw_quad.h"
 #include "util/u_memory.h"
 #include "util/u_format_s3tc.h"
 #include "util/u_upload_mgr.h"
@@ -39,6 +40,69 @@
  * pipe_context
  */
 
+void r600_draw_rectangle(struct blitter_context *blitter,
+			 int x1, int y1, int x2, int y2, float depth,
+			 enum blitter_attrib_type type,
+			 const union pipe_color_union *attrib)
+{
+	struct r600_common_context *rctx =
+		(struct r600_common_context*)util_blitter_get_pipe(blitter);
+	struct pipe_viewport_state viewport;
+	struct pipe_resource *buf = NULL;
+	unsigned offset = 0;
+	float *vb;
+
+	if (type == UTIL_BLITTER_ATTRIB_TEXCOORD) {
+		util_blitter_draw_rectangle(blitter, x1, y1, x2, y2, depth, type, attrib);
+		return;
+	}
+
+	/* Some operations (like color resolve on r6xx) don't work
+	 * with the conventional primitive types.
+	 * One that works is PT_RECTLIST, which we use here. */
+
+	/* setup viewport */
+	viewport.scale[0] = 1.0f;
+	viewport.scale[1] = 1.0f;
+	viewport.scale[2] = 1.0f;
+	viewport.scale[3] = 1.0f;
+	viewport.translate[0] = 0.0f;
+	viewport.translate[1] = 0.0f;
+	viewport.translate[2] = 0.0f;
+	viewport.translate[3] = 0.0f;
+	rctx->b.set_viewport_states(&rctx->b, 0, 1, &viewport);
+
+	/* Upload vertices. The hw rectangle has only 3 vertices,
+	 * I guess the 4th one is derived from the first 3.
+	 * The vertex specification should match u_blitter's vertex element state. */
+	u_upload_alloc(rctx->uploader, 0, sizeof(float) * 24, &offset, &buf, (void**)&vb);
+	vb[0] = x1;
+	vb[1] = y1;
+	vb[2] = depth;
+	vb[3] = 1;
+
+	vb[8] = x1;
+	vb[9] = y2;
+	vb[10] = depth;
+	vb[11] = 1;
+
+	vb[16] = x2;
+	vb[17] = y1;
+	vb[18] = depth;
+	vb[19] = 1;
+
+	if (attrib) {
+		memcpy(vb+4, attrib->f, sizeof(float)*4);
+		memcpy(vb+12, attrib->f, sizeof(float)*4);
+		memcpy(vb+20, attrib->f, sizeof(float)*4);
+	}
+
+	/* draw */
+	util_draw_vertex_buffer(&rctx->b, NULL, buf, blitter->vb_slot, offset,
+				R600_PRIM_RECTANGLE_LIST, 3, 2);
+	pipe_resource_reference(&buf, NULL);
+}
+
 void r600_need_dma_space(struct r600_common_context *ctx, unsigned num_dw)
 {
 	/* The number of dwords we already used in the DMA so far. */
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index ab348ae02cc..ed16e1a7b0c 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -36,6 +36,7 @@
 
 #include "../../winsys/radeon/drm/radeon_winsys.h"
 
+#include "util/u_blitter.h"
 #include "util/u_double_list.h"
 #include "util/u_range.h"
 #include "util/u_slab.h"
@@ -74,6 +75,9 @@
 #define R600_CONTEXT_VGT_FLUSH			(1 << 19)
 #define R600_CONTEXT_VGT_STREAMOUT_SYNC		(1 << 20)
 
+/* special primitive types */
+#define R600_PRIM_RECTANGLE_LIST	PIPE_PRIM_MAX
+
 /* Debug flags. */
 /* logging */
 #define DBG_TEX			(1 << 0)
@@ -427,6 +431,10 @@ struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 					 unsigned alignment);
 
 /* r600_common_pipe.c */
+void r600_draw_rectangle(struct blitter_context *blitter,
+			 int x1, int y1, int x2, int y2, float depth,
+			 enum blitter_attrib_type type,
+			 const union pipe_color_union *attrib);
 bool r600_common_screen_init(struct r600_common_screen *rscreen,
 			     struct radeon_winsys *ws);
 void r600_destroy_common_screen(struct r600_common_screen *rscreen);