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Bug 756813: Prevent creation of ImageLayer if ImageContainer is null r=gal

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This commit is contained in:
David Zbarsky 2012-05-21 10:47:40 -07:00
parent f96a38930e
commit 671206ed34
1 changed files with 8 additions and 2 deletions
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10
layout/base/nsDisplayList.cpp
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@ -1129,8 +1129,14 @@ nsDisplayBackground::TryOptimizeToImageLayer(nsDisplayListBuilder* aBuilder)
*bg,
layer);
nsImageRenderer* imageRenderer = &state.mImageRenderer;
// We only care about images here, not gradients.
if (!state.mImageRenderer.IsRasterImage())
if (imageRenderer->IsRasterImage())
return false;
nsRefPtr<ImageContainer> imageContainer = imageRenderer->GetContainer();
// Image is not ready to be made into a layer yet
if (!imageContainer)
return false;
// We currently can't handle tiled or partial backgrounds.
@ -1145,7 +1151,7 @@ nsDisplayBackground::TryOptimizeToImageLayer(nsDisplayListBuilder* aBuilder)
PRInt32 appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
mDestRect = nsLayoutUtils::RectToGfxRect(state.mDestArea, appUnitsPerDevPixel);
mImageContainer = state.mImageRenderer.GetContainer();
mImageContainer = imageContainer;
// Ok, we can turn this into a layer if needed.
return true;