From: Eric Anholt <eric@anholt.net>
Date: Wed, 19 Dec 2012 00:05:24 +0000 (-0800)
Subject: i965: Start using HIZ for Z16 textures.
X-Git-Tag: android-x86-4.4-r1~2177
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=5628501e7b4289f5a04a2ca26d1ed4b3dec1a442;p=android-x86%2Fexternal-mesa.git

i965: Start using HIZ for Z16 textures.

I had left this out for a long time because it regressed some
depthstencil-render-miplevels cases when it was enabled.  Now that the
bugs causing those are fixed, there's nothing stopping us.

Improves glbenchmark 2.1 offscreen performance by 7.3% +/- 2.8% (n=10).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/drivers/dri/i965/brw_vtbl.c b/src/mesa/drivers/dri/i965/brw_vtbl.c
index 237ec1ef78a..cb25be9735b 100644
--- a/src/mesa/drivers/dri/i965/brw_vtbl.c
+++ b/src/mesa/drivers/dri/i965/brw_vtbl.c
@@ -239,6 +239,7 @@ static bool brw_is_hiz_depth_format(struct intel_context *intel,
    case MESA_FORMAT_Z32_FLOAT_X24S8:
    case MESA_FORMAT_X8_Z24:
    case MESA_FORMAT_S8_Z24:
+   case MESA_FORMAT_Z16:
       return true;
    default:
       return false;