1 /* 2 * Copyright 2018 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkSGClipEffect.h" 9 10 #include "SkCanvas.h" 11 #include "SkPath.h" 12 #include "SkSGGeometryNode.h" 13 14 namespace sksg { 15 16 ClipEffect::ClipEffect(sk_sp<RenderNode> child, sk_sp<GeometryNode> clip, bool aa) 17 : INHERITED(std::move(child)) 18 , fClipNode(std::move(clip)) 19 , fAntiAlias(aa) { 20 this->observeInval(fClipNode); 21 } 22 23 ClipEffect::~ClipEffect() { 24 this->unobserveInval(fClipNode); 25 } 26 27 void ClipEffect::onRender(SkCanvas* canvas) const { 28 if (this->bounds().isEmpty()) 29 return; 30 31 SkAutoCanvasRestore acr(canvas, !fNoop); 32 if (!fNoop) { 33 fClipNode->clip(canvas, fAntiAlias); 34 } 35 36 this->INHERITED::onRender(canvas); 37 } 38 39 SkRect ClipEffect::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) { 40 SkASSERT(this->hasInval()); 41 42 const auto clipBounds = fClipNode->revalidate(ic, ctm); 43 auto childBounds = this->INHERITED::onRevalidate(ic, ctm); 44 45 fNoop = fClipNode->asPath().conservativelyContainsRect(childBounds); 46 47 return childBounds.intersect(clipBounds) ? childBounds : SkRect::MakeEmpty(); 48 } 49 50 } // namespace sksg 51
