No functional change. This patch modifies intel_miptree_alloc_mcs to
allocate the 4x MCS buffer using MESA_FORMAT_R8 instead of
MESA_FORMAT_A8. In principle it doesn't matter, since we only access
the buffer using MCS-specific hardware mechanisms, so all that's
important is to use a format with the correct size. However,
MESA_FORMAT_A8 has enough unusual behaviours that it seems prudent to
avoid it.
---
src/mesa/drivers/dri/intel/intel_mipmap_tree.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index 3d15a8d..53bc23f 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -684,7 +684,7 @@ intel_miptree_alloc_mcs(struct intel_context *intel,
/* 8 bits/pixel are required for MCS data when using 4x MSAA (2 bits for
* each sample).
*/
- format = MESA_FORMAT_A8;
+ format = MESA_FORMAT_R8;
break;
case 8:
/* 32 bits/pixel are required for MCS data when using 8x MSAA (3 bits
--
1.7.7.6
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