+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.translate[0] = 0.0f;
+ viewport.translate[1] = 0.0f;
+ viewport.translate[2] = 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, 256, &offset, &buf, (void**)&vb);
+ if (!buf)
+ return;
+
+ 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);
+}
+