| /* |
| * 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 |