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Bug 747822 - Implement push/pop clip for Cairo/Azure. r=joe

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This commit is contained in:
Nicholas Cameron 2012-04-26 10:04:36 +12:00
parent 5bbbd85991
commit dafb189f11
1 changed files with 19 additions and 1 deletions
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20
gfx/2d/DrawTargetCairo.cpp
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@ -616,21 +616,38 @@ DrawTargetCairo::Mask(const Pattern &aSource,
const DrawOptions &aOptions /* = DrawOptions() */)
{
AutoPrepareForDrawing prep(this, mContext);
// TODO
}
void
DrawTargetCairo::PushClip(const Path *aPath)
{
if (aPath->GetBackendType() != BACKEND_CAIRO) {
return;
}
WillChange(aPath);
PathCairo* path = const_cast<PathCairo*>(static_cast<const PathCairo*>(aPath));
cairo_save(mContext);
path->CopyPathTo(mContext, this);
cairo_clip_preserve(mContext);
}
void
DrawTargetCairo::PushClipRect(const Rect& aRect)
{
WillChange();
cairo_save(mContext);
cairo_rectangle(mContext, aRect.X(), aRect.Y(), aRect.Width(), aRect.Height());
cairo_clip_preserve(mContext);
}
void
DrawTargetCairo::PopClip()
{
// save/restore does not affect the path, so no need to cal WillChange()
cairo_restore(mContext);
}
TemporaryRef<PathBuilder>
@ -768,7 +785,8 @@ DrawTargetCairo::WillChange(const Path* aPath /* = NULL */)
mSnapshots.clear();
}
if (aPath && mPathObserver && !mPathObserver->ContainsPath(aPath)) {
if (mPathObserver &&
(!aPath || !mPathObserver->ContainsPath(aPath))) {
mPathObserver->PathWillChange();
mPathObserver = NULL;
}