sna/trapezoids: Write unaligned fallback boxes inplace

As this is a pure write operation (though we will write the edge pixels
twice) we can perform this operation inplace and incur a slightly slower
trap creation at the benefit of avoiding the later copy.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/sna/sna_trapezoids.c b/src/sna/sna_trapezoids.c
index 72dcd3ef..7bbe2708 100644
--- a/src/sna/sna_trapezoids.c
+++ b/src/sna/sna_trapezoids.c
@@ -3582,7 +3582,7 @@ composite_unaligned_boxes_fallback(CARD8 op,
 			scratch = sna_pixmap_create_upload(screen,
 							   extents.x2 - extents.x1,
 							   extents.y2 - extents.y1,
-							   8, KGEM_BUFFER_WRITE);
+							   8, KGEM_BUFFER_WRITE_INPLACE);
 		if (!scratch)
 			continue;