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Bug 635035, part 1: Separate the extended draw region and computed draw region so that shadow-layer readback gets the same quadrant as what was drawn. r=mattwoodrow

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This commit is contained in:
Chris Jones
2011-03-09 11:27:37 -06:00
parent c3cfbf415d
commit e66e769b1e
1 changed files with 12 additions and 6 deletions
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18
gfx/layers/basic/BasicLayers.cpp
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@@ -426,6 +426,7 @@ protected:
virtual void
PaintBuffer(gfxContext* aContext,
const nsIntRegion& aRegionToDraw,
const nsIntRegion& aExtendedRegionToDraw,
const nsIntRegion& aRegionToInvalidate,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData)
@@ -434,14 +435,14 @@ protected:
BasicManager()->SetTransactionIncomplete();
return;
}
aCallback(this, aContext, aRegionToDraw, aRegionToInvalidate,
aCallback(this, aContext, aExtendedRegionToDraw, aRegionToInvalidate,
aCallbackData);
// Everything that's visible has been validated. Do this instead of just
// OR-ing with aRegionToDraw, since that can lead to a very complex region
// here (OR doesn't automatically simplify to the simplest possible
// representation of a region.)
nsIntRegion tmp;
tmp.Or(mVisibleRegion, aRegionToDraw);
tmp.Or(mVisibleRegion, aExtendedRegionToDraw);
mValidRegion.Or(mValidRegion, tmp);
}
@@ -599,12 +600,13 @@ BasicThebesLayer::PaintThebes(gfxContext* aContext,
// from RGB to RGBA, because we might need to repaint with
// subpixel AA)
state.mRegionToInvalidate.And(state.mRegionToInvalidate, mVisibleRegion);
state.mRegionToDraw.ExtendForScaling(paintXRes, paintYRes);
nsIntRegion extendedDrawRegion = state.mRegionToDraw;
extendedDrawRegion.ExtendForScaling(paintXRes, paintYRes);
mXResolution = paintXRes;
mYResolution = paintYRes;
SetAntialiasingFlags(this, state.mContext);
PaintBuffer(state.mContext,
state.mRegionToDraw, state.mRegionToInvalidate,
state.mRegionToDraw, extendedDrawRegion, state.mRegionToInvalidate,
aCallback, aCallbackData);
Mutated();
} else {
@@ -1795,6 +1797,7 @@ private:
NS_OVERRIDE virtual void
PaintBuffer(gfxContext* aContext,
const nsIntRegion& aRegionToDraw,
const nsIntRegion& aExtendedRegionToDraw,
const nsIntRegion& aRegionToInvalidate,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData);
@@ -1854,11 +1857,13 @@ BasicShadowableThebesLayer::SetBackBufferAndAttrs(const ThebesBuffer& aBuffer,
void
BasicShadowableThebesLayer::PaintBuffer(gfxContext* aContext,
const nsIntRegion& aRegionToDraw,
const nsIntRegion& aExtendedRegionToDraw,
const nsIntRegion& aRegionToInvalidate,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData)
{
Base::PaintBuffer(aContext, aRegionToDraw, aRegionToInvalidate,
Base::PaintBuffer(aContext,
aRegionToDraw, aExtendedRegionToDraw, aRegionToInvalidate,
aCallback, aCallbackData);
if (!HasShadow()) {
return;
@@ -1875,7 +1880,8 @@ BasicShadowableThebesLayer::PaintBuffer(gfxContext* aContext,
updatedRegion = aRegionToDraw;
}
NS_ASSERTION(mBuffer.BufferRect().Contains(aRegionToDraw.GetBounds()),
"Update outside of buffer rect!");
NS_ABORT_IF_FALSE(IsSurfaceDescriptorValid(mBackBuffer),
"should have a back buffer by now");
BasicManager()->PaintedThebesBuffer(BasicManager()->Hold(this),