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Bug 1179049. Properly null check for draw target in box shadow code. r=mstange

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This commit is contained in:
Mason Chang 2015-07-06 08:58:22 -07:00
parent 423571717d
commit 2ad9b546ea
1 changed files with 9 additions and 0 deletions
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9
gfx/thebes/gfxBlur.cpp
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@ -434,6 +434,11 @@ CreateBoxShadow(DrawTarget& aDT, SourceSurface* aBlurMask, const gfxRGBA& aShado
gfxPlatform* platform = gfxPlatform::GetPlatform();
RefPtr<DrawTarget> boxShadowDT =
platform->CreateOffscreenContentDrawTarget(blurredSize, SurfaceFormat::B8G8R8A8);
if (!boxShadowDT) {
return nullptr;
}
MOZ_ASSERT(boxShadowDT->GetType() == aDT.GetType());
ColorPattern shadowColor(ToDeviceColor(aShadowColor));
@ -475,6 +480,10 @@ GetBlur(DrawTarget& aDT,
}
RefPtr<SourceSurface> boxShadow = CreateBoxShadow(aDT, blurMask, aShadowColor);
if (!boxShadow) {
return nullptr;
}
CacheBlur(aDT, minSize, aBlurRadius, aCornerRadii, aShadowColor, aExtendDestBy, boxShadow);
return boxShadow;
}