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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSGClipEffect.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkSGGeometryNode.h"
namespace sksg {
ClipEffect::ClipEffect(sk_sp<RenderNode> child, sk_sp<GeometryNode> clip, bool aa)
: INHERITED(std::move(child))
, fClipNode(std::move(clip))
, fAntiAlias(aa) {
this->observeInval(fClipNode);
}
ClipEffect::~ClipEffect() {
this->unobserveInval(fClipNode);
}
void ClipEffect::onRender(SkCanvas* canvas) const {
if (this->bounds().isEmpty())
return;
SkAutoCanvasRestore acr(canvas, !fNoop);
if (!fNoop) {
fClipNode->clip(canvas, fAntiAlias);
}
this->INHERITED::onRender(canvas);
}
SkRect ClipEffect::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
SkASSERT(this->hasInval());
const auto clipBounds = fClipNode->revalidate(ic, ctm);
auto childBounds = this->INHERITED::onRevalidate(ic, ctm);
fNoop = fClipNode->asPath().conservativelyContainsRect(childBounds);
return childBounds.intersect(clipBounds) ? childBounds : SkRect::MakeEmpty();
}
} // namespace sksg
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