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Bug 1023506 - Don't fill the background color for overscrolled scrollinfo layers. r=mattwoodrow

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This commit is contained in:
Kartikaya Gupta 2014-06-25 19:18:33 -04:00
parent e614389b45
commit 9a6406323d
1 changed files with 3 additions and 1 deletions
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4
gfx/layers/composite/ContainerLayerComposite.cpp
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@ -350,7 +350,9 @@ ContainerRender(ContainerT* aContainer,
// with the background color by drawing a rectangle of the background color
// over the entire composited area before drawing the container contents.
if (AsyncPanZoomController* apzc = aContainer->GetAsyncPanZoomController()) {
if (apzc->IsOverscrolled()) {
// Make sure not to do this on a "scrollinfo" layer (one with an empty visible
// region) because it's just a placeholder for APZ purposes.
if (apzc->IsOverscrolled() && !aContainer->GetVisibleRegion().IsEmpty()) {
gfxRGBA color = aContainer->GetBackgroundColor();
// If the background is completely transparent, there's no point in
// drawing anything for it. Hopefully the layers behind, if any, will