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Bug 579885. Part 2: Never use SOURCE to composite ThebesLayers into the target, just use OVER and assume cairo backends will optimize. r=vlad,a=blocking

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This commit is contained in:
Robert O'Callahan 2010-11-12 14:43:42 +13:00
parent 5dc58e0b07
commit 32e1df6ff8
1 changed files with 3 additions and 8 deletions
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11
gfx/layers/basic/BasicLayers.cpp
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@ -292,8 +292,7 @@ public:
* drawn before this is called. The contents of the buffer are drawn
* to aTarget.
*/
void DrawTo(ThebesLayer* aLayer, PRBool aIsOpaqueContent,
gfxContext* aTarget, float aOpacity);
void DrawTo(ThebesLayer* aLayer, gfxContext* aTarget, float aOpacity);
virtual already_AddRefed<gfxASurface>
CreateBuffer(ContentType aType, const nsIntSize& aSize);
@ -528,7 +527,7 @@ BasicThebesLayer::Paint(gfxContext* aContext,
}
}
mBuffer.DrawTo(this, canUseOpaqueSurface, target, opacity);
mBuffer.DrawTo(this, target, opacity);
}
static PRBool
@ -542,7 +541,6 @@ IsClippingCheap(gfxContext* aTarget, const nsIntRegion& aRegion)
void
BasicThebesLayerBuffer::DrawTo(ThebesLayer* aLayer,
PRBool aIsOpaqueContent,
gfxContext* aTarget,
float aOpacity)
{
@ -559,9 +557,6 @@ BasicThebesLayerBuffer::DrawTo(ThebesLayer* aLayer,
// and may cause gray lines.
gfxUtils::ClipToRegionSnapped(aTarget, aLayer->GetVisibleRegion());
}
if (aIsOpaqueContent) {
aTarget->SetOperator(gfxContext::OPERATOR_SOURCE);
}
DrawBufferWithRotation(aTarget, aOpacity,
aLayer->GetXResolution(), aLayer->GetYResolution());
aTarget->Restore();
@ -1995,7 +1990,7 @@ BasicShadowThebesLayer::Paint(gfxContext* aContext,
gfxContext* target = BasicManager()->GetTarget();
NS_ASSERTION(target, "We shouldn't be called if there's no target");
mFrontBuffer.DrawTo(this, CanUseOpaqueSurface(), target, GetEffectiveOpacity());
mFrontBuffer.DrawTo(this, target, GetEffectiveOpacity());
}
class BasicShadowContainerLayer : public ShadowContainerLayer, BasicImplData {