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Bug 1205630 - Translate a fixed background display item's clip rect correctly when setting it on the layer. r=mstange

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This commit is contained in:
Botond Ballo 2015-09-25 12:55:00 -04:00
parent 4e967275c1
commit 527a800195
1 changed files with 3 additions and 1 deletions
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4
layout/base/FrameLayerBuilder.cpp
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@ -3268,7 +3268,9 @@ void ContainerState::FinishPaintedLayerData(PaintedLayerData& aData, FindOpaqueB
// its clip in ProcessDisplayItems() and saved it to set on the layer instead.
// Set the clip on the layer now.
if (data->mSingleItemFixedToViewport && data->mItemClip.HasClip()) {
data->mLayer->SetClipRect(Some(ViewAs<ParentLayerPixel>(ScaleToNearestPixels(data->mItemClip.GetClipRect()))));
nsIntRect layerClipRect = ScaleToNearestPixels(data->mItemClip.GetClipRect());
layerClipRect.MoveBy(mParameters.mOffset);
data->mLayer->SetClipRect(Some(ViewAs<ParentLayerPixel>(layerClipRect)));
// There is only one item, so all of the clips are in common to all items.
// data->mCommonClipCount will be zero because we removed the clip from
// the display item. (It could also be -1 if we're inside an inactive