Signed-off-by: Topi Pohjolainen <topi.pohjolai...@intel.com>
---
src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 21 +++++++++++++++++++++
src/mesa/drivers/dri/i965/intel_mipmap_tree.h | 3 +++
2 files changed, 24 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 1fd2654..59961f2 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -270,6 +270,27 @@ intel_miptree_supports_non_msrt_fast_clear(struct
brw_context *brw,
return true;
}
+bool
+intel_miptree_supports_lossless_compressed(mesa_format format)
+{
+ /* For now compression is only enabled for integer formats even though
+ * there exist supported floating point formats also. This is a heuristic
+ * decision based on current public benchmarks. In none of the cases these
+ * formats provided any improvement but a few cases were seen to regress.
+ * Hence these are left to to be enabled in the future when they are known
+ * to improve things.
+ */
+ if (!_mesa_is_format_integer_color(format))
+ return false;
+
+ /* In principle, fast clear mechanism and lossless compression go hand in
+ * hand. However, fast clear can be also used to clear srgb surfaces by
+ * using equivalent linear format. This trick, however, can't be extended
+ * to be used with lossless compression and therefore a check is needed to
+ * see if the format really is linear.
+ */
+ return _mesa_get_srgb_format_linear(format) == format;
+}
/**
* Determine depth format corresponding to a depth+stencil format,
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
index f05436d..3a1ecd2 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
@@ -684,6 +684,9 @@ intel_miptree_supports_non_msrt_fast_clear(struct
brw_context *brw,
const struct intel_mipmap_tree *mt);
bool
+intel_miptree_supports_lossless_compressed(mesa_format format);
+
+bool
intel_miptree_alloc_non_msrt_mcs(struct brw_context *brw,
struct intel_mipmap_tree *mt);
--
2.5.0
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
