r300g: implement fast color clear

An initial implementation made by Dave Airlie.

For it to be used, a color-only clear must be invoked and exactly one
point-sampled render target must be set. The render target must be
macrotiled (for us to overcome alignment issues) and bpp must be either
16 or 32.

I can't see a difference in performance. :(

Conflicts:

	src/gallium/drivers/r300/r300_blit.c

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c
index adb02b4e63..1e0369b377 100644
--- a/src/gallium/drivers/r300/r300_render.c
+++ b/src/gallium/drivers/r300/r300_render.c
@@ -224,6 +224,7 @@ static void r300_prepare_for_rendering(struct r300_context *r300,
 
     /* Emitted in flush. */
     end_dwords += 26; /* emit_query_end */
+    end_dwords += r300->hyperz_state.size; /* emit_hyperz_end */
 
     cs_dwords += end_dwords;