EXA: Track source/mask pixmaps more explicitly for Composite fallback regions.

In particular, make sure pExaScr->src/maskPix are cleared when the
corresponding pictures aren't associated with drawables, i.e. solid or gradient
pictures. Without this, we would in some cases associate the source/mask region
with unrelated pixmaps from previous Composite fallbacks, resulting in random
corruption.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47266

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/exa/exa_priv.h b/exa/exa_priv.h
index 70075786a..1f5605687 100644
--- a/exa/exa_priv.h
+++ b/exa/exa_priv.h
@@ -208,6 +208,7 @@ typedef struct {
     RegionRec srcReg;
     RegionRec maskReg;
     PixmapPtr srcPix;
+    PixmapPtr maskPix;
 
     DevPrivateKeyRec pixmapPrivateKeyRec;
     DevPrivateKeyRec gcPrivateKeyRec;