corysanin/tubestation
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Bug 539356 - Part 9a - Add new display list invalidation API to nsDisplayItem and implement it. r=roc

Browse Source
This commit is contained in:
Matt Woodrow
2012-08-29 17:39:01 +12:00
parent 08eb791425
commit 7be65018f2
11 changed files with 510 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
layout/generic/nsCanvasFrame.h
View File

@@ -116,6 +116,28 @@ protected:
bool mAddedScrollPositionListener;
};
class nsDisplayCanvasBackgroundGeometry : public nsDisplayItemGeometry
{
public:
nsDisplayCanvasBackgroundGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder, const nsRect& aChildBorder)
: nsDisplayItemGeometry(aItem, aBuilder)
, mChildBorder(aChildBorder)
, mPaddingRect(aItem->GetPaddingRect())
, mContentRect(aItem->GetContentRect())
{}
virtual void MoveBy(const nsPoint& aOffset)
{
mBounds.MoveBy(aOffset);
mPaddingRect.MoveBy(aOffset);
mContentRect.MoveBy(aOffset);
}
nsRect mChildBorder;
nsRect mPaddingRect;
nsRect mContentRect;
};
/**
* Override nsDisplayBackground methods so that we pass aBGClipRect to
* PaintBackground, covering the whole overflow area.
@@ -169,7 +191,39 @@ public:
// We need to override so we don't consider border-radius.
aOutFrames->AppendElement(mFrame);
}
virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder)
{
nsIFrame *child = mFrame->GetFirstPrincipalChild();
return new nsDisplayCanvasBackgroundGeometry(this, aBuilder,
child ? child->GetRect() : nsRect());;
}
virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion)
{
const nsDisplayCanvasBackgroundGeometry* geometry = static_cast<const nsDisplayCanvasBackgroundGeometry*>(aGeometry);
if (ShouldFixToViewport(aBuilder)) {
// This is incorrect, We definitely need to check more things here.
return;
}
nsIFrame *child = mFrame->GetFirstPrincipalChild();
bool snap;
if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) ||
(child && !geometry->mChildBorder.IsEqualInterior(child->GetRect())) ||
!geometry->mPaddingRect.IsEqualInterior(GetPaddingRect()) ||
!geometry->mContentRect.IsEqualInterior(GetContentRect())) {
if (!RenderingMightDependOnFrameSize() && geometry->mBounds.TopLeft() == GetBounds(aBuilder, &snap).TopLeft()) {
aInvalidRegion->Xor(GetBounds(aBuilder, &snap), geometry->mBounds);
} else {
aInvalidRegion->Or(GetBounds(aBuilder, &snap), geometry->mBounds);
}
}
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) MOZ_OVERRIDE;