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, 1 deletions

diff --git a/src/gallium/drivers/r300/r300_context.c b/src/gallium/drivers/r300/r300_context.c
index cce76cb1dfe..1beab7628a0 100644
--- a/src/gallium/drivers/r300/r300_context.c
+++ b/src/gallium/drivers/r300/r300_context.c
@@ -330,7 +330,7 @@ static void r300_init_states(struct pipe_context *pipe)
         BEGIN_CB(&hyperz->cb_begin, r300->hyperz_state.size);
         OUT_CB_REG(R300_ZB_BW_CNTL, 0);
         OUT_CB_REG(R300_ZB_DEPTHCLEARVALUE, 0);
-        OUT_CB_REG(R300_SC_HYPERZ, 0x1C);
+        OUT_CB_REG(R300_SC_HYPERZ, R300_SC_HYPERZ_ADJ_2);
         END_CB;
     }
 }