This lets us use the resource_copy_region() path when blitting from
R8G8B8A8 to R8G8B8x8, for example.
---
src/gallium/auxiliary/util/u_blit.c | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_blit.c
b/src/gallium/auxiliary/util/u_blit.c
index a10fd17..8865823 100644
--- a/src/gallium/auxiliary/util/u_blit.c
+++ b/src/gallium/auxiliary/util/u_blit.c
@@ -321,6 +321,21 @@ regions_overlap(int srcX0, int srcY0,
/**
+ * Can we blit from src format to dest format with a simple copy?
+ */
+static boolean
+formats_compatible(enum pipe_format src_format,
+ enum pipe_format dst_format)
+{
+ const struct util_format_description *src_desc =
+ util_format_description(src_format);
+ const struct util_format_description *dst_desc =
+ util_format_description(dst_format);
+ return util_is_format_compatible(src_desc, dst_desc);
+}
+
+
+/**
* Copy pixel block from src surface to dst surface.
* Overlapping regions are acceptable.
* Flipping and stretching are supported.
@@ -377,7 +392,7 @@ util_blit_pixels_writemask(struct blit_state *ctx,
* no overlapping.
* Filter mode should not matter since there's no stretching.
*/
- if (dst_format == src_format &&
+ if (formats_compatible(src_format, dst_format) &&
srcX0 < srcX1 &&
dstX0 < dstX1 &&
srcY0 < srcY1 &&
--
1.7.3.4
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