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fix [1947273] the DimLayer causes the whole screen to update during transactions

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This commit is contained in:
Mathias Agopian 2009-06-28 02:54:16 -07:00
parent ce6d172107
commit 6b3287b5d4
1 changed files with 6 additions and 5 deletions
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11
libs/surfaceflinger/SurfaceFlinger.cpp
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@ -771,10 +771,11 @@ void SurfaceFlinger::computeVisibleRegions(
dirty.orSelf(layer->visibleRegionScreen);
layer->contentDirty = false;
} else {
// compute the exposed region
// dirty = what's visible now - what's wasn't covered before
// = what's visible now & what's was covered before
dirty = visibleRegion.intersect(layer->coveredRegionScreen);
/* compute the exposed region:
* exposed = what's VISIBLE and NOT COVERED now
* but was COVERED before
*/
dirty = (visibleRegion - coveredRegion) & layer->coveredRegionScreen;
}
dirty.subtractSelf(aboveOpaqueLayers);
@ -783,7 +784,7 @@ void SurfaceFlinger::computeVisibleRegions(
// updade aboveOpaqueLayers/aboveCoveredLayers for next (lower) layer
aboveOpaqueLayers.orSelf(opaqueRegion);
aboveCoveredLayers.orSelf(bounds);
aboveCoveredLayers.orSelf(visibleRegion);
// Store the visible region is screen space
layer->setVisibleRegion(visibleRegion);