This will be re-used to initialize auxiliary buffers in lossless
compression case.
Signed-off-by: Topi Pohjolainen <topi.pohjolai...@intel.com>
---
src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 36 ++++++++++++++++-----------
1 file changed, 22 insertions(+), 14 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index e9ff800..18803f7 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1437,6 +1437,27 @@ intel_miptree_copy_teximage(struct brw_context *brw,
intel_obj->needs_validate = true;
}
+static void
+intel_miptree_init_mcs(struct brw_context *brw,
+ struct intel_mipmap_tree *mt,
+ int init_value)
+{
+ /* From the Ivy Bridge PRM, Vol 2 Part 1 p326:
+ *
+ * When MCS buffer is enabled and bound to MSRT, it is required that it
+ * is cleared prior to any rendering.
+ *
+ * Since we don't use the MCS buffer for any purpose other than rendering,
+ * it makes sense to just clear it immediately upon allocation.
+ *
+ * Note: the clear value for MCS buffers is all 1's, so we memset to 0xff.
+ */
+ void *data = intel_miptree_map_raw(brw, mt->mcs_mt);
+ memset(data, init_value, mt->mcs_mt->total_height * mt->mcs_mt->pitch);
+ intel_miptree_unmap_raw(mt->mcs_mt);
+ mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_CLEAR;
+}
+
static bool
intel_miptree_alloc_mcs(struct brw_context *brw,
struct intel_mipmap_tree *mt,
@@ -1494,20 +1515,7 @@ intel_miptree_alloc_mcs(struct brw_context *brw,
INTEL_MSAA_LAYOUT_NONE,
mcs_flags);
- /* From the Ivy Bridge PRM, Vol 2 Part 1 p326:
- *
- * When MCS buffer is enabled and bound to MSRT, it is required that it
- * is cleared prior to any rendering.
- *
- * Since we don't use the MCS buffer for any purpose other than rendering,
- * it makes sense to just clear it immediately upon allocation.
- *
- * Note: the clear value for MCS buffers is all 1's, so we memset to 0xff.
- */
- void *data = intel_miptree_map_raw(brw, mt->mcs_mt);
- memset(data, 0xff, mt->mcs_mt->total_height * mt->mcs_mt->pitch);
- intel_miptree_unmap_raw(mt->mcs_mt);
- mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_CLEAR;
+ intel_miptree_init_mcs(brw, mt, 0xFF);
return mt->mcs_mt;
}
--
2.5.0
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