sna/damage: Verify that all-damage covers the entire pixmap after reduction

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

1 files changed, 5 insertions, 0 deletions

diff --git a/src/sna/sna_damage.c b/src/sna/sna_damage.c
index 5a4d67c3..03bb881c 100644
--- a/src/sna/sna_damage.c
+++ b/src/sna/sna_damage.c
@@ -947,6 +947,11 @@ struct sna_damage *_sna_damage_is_all(struct sna_damage *damage,
 	if (damage->region.data)
 		return damage;
 
+	assert(damage->extents.x1 == 0 &&
+	       damage->extents.y1 == 0 &&
+	       damage->extents.x2 == width &&
+	       damage->extents.y2 == height);
+
 	return _sna_damage_all(damage, width, height);
 }