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sna: Skip an empty slave update 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-01-18 12:01:54 +00:00
parent 38de17f80d
commit 2de43a0164
1 changed files with 3 additions and 0 deletions
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3
src/sna/sna_accel.c
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@ -13821,6 +13821,9 @@ static void sna_accel_post_damage(struct sna *sna)
region.extents.x2, region.extents.y2));
RegionIntersect(&region, &region, damage);
if (!RegionNotEmpty(&region))
continue;
RegionTranslate(&region, -dirty->x, -dirty->y);
DamageRegionAppend(&dirty->slave_dst->drawable, &region);