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Bug 759993. Part 0: FrameLayerBuilder::GetThebesLayerScaleForFrame should not cross popup boundaries. r=mattwoodrow

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This commit is contained in:
Robert O'Callahan 2012-11-11 00:17:16 -08:00
parent f2a74e894b
commit 15d3d80fbd
1 changed files with 11 additions and 2 deletions
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9
layout/base/FrameLayerBuilder.cpp
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@ -3022,8 +3022,10 @@ PredictScaleForContent(nsIFrame* aFrame, nsIFrame* aAncestorWithScale,
{
gfx3DMatrix transform =
gfx3DMatrix::ScalingMatrix(aScale.width, aScale.height, 1.0);
if (aFrame != aAncestorWithScale) {
// aTransform is applied first, then the scale is applied to the result
transform = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestorWithScale)*transform;
}
gfxMatrix transform2d;
if (transform.CanDraw2D(&transform2d)) {
return transform2d.ScaleFactors(true);
@ -3038,6 +3040,13 @@ FrameLayerBuilder::GetThebesLayerScaleForFrame(nsIFrame* aFrame)
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
last = f;
if (nsLayoutUtils::IsPopup(f)) {
// Don't examine ancestors of a popup. It won't make sense to check
// the transform from some content inside the popup to some content
// which is an ancestor of the popup.
break;
}
nsTArray<DisplayItemData*> *array =
reinterpret_cast<nsTArray<DisplayItemData*>*>(aFrame->Properties().Get(LayerManagerDataProperty()));
if (!array) {