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