3ba3fa72ae
... to avoid having too many Node friends. TBR= Change-Id: I8f8ff570d94ea48017935066a3d51cd8265ec120 Reviewed-on: https://skia-review.googlesource.com/97980 Reviewed-by: Florin Malita <fmalita@chromium.org> Commit-Queue: Florin Malita <fmalita@chromium.org>
153 lines
3.5 KiB
C++
153 lines
3.5 KiB
C++
/*
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* Copyright 2017 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 "SkRectPriv.h"
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#include "SkSGNode.h"
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#include "SkSGInvalidationController.h"
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namespace sksg {
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class Node::ScopedFlag {
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public:
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ScopedFlag(Node* node, uint32_t flag)
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: fNode(node)
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, fFlag(flag)
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, fWasSet(node->fFlags & flag) {
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node->fFlags |= flag;
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}
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~ScopedFlag() {
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if (!fWasSet) {
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fNode->fFlags &= ~fFlag;;
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}
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}
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bool wasSet() const { return fWasSet; }
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private:
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Node* fNode;
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uint32_t fFlag;
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bool fWasSet;
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};
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#define TRAVERSAL_GUARD \
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ScopedFlag traversal_guard(this, kInTraversal_Flag); \
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if (traversal_guard.wasSet()) \
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return
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Node::Node(uint32_t invalTraits)
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: fInvalObserver(nullptr)
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, fBounds(SkRectPriv::MakeLargeS32())
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, fInvalTraits(invalTraits)
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, fFlags(kInvalidated_Flag) {}
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Node::~Node() {
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if (fFlags & kObserverArray_Flag) {
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SkASSERT(fInvalObserverArray->isEmpty());
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delete fInvalObserverArray;
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} else {
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SkASSERT(!fInvalObserver);
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}
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}
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void Node::observeInval(const sk_sp<Node>& node) {
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SkASSERT(node);
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if (!(node->fFlags & kObserverArray_Flag)) {
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if (!node->fInvalObserver) {
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node->fInvalObserver = this;
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return;
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}
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auto observers = new SkTDArray<Node*>();
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observers->setReserve(2);
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observers->push(node->fInvalObserver);
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node->fInvalObserverArray = observers;
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node->fFlags |= kObserverArray_Flag;
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}
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// No duplicate observers.
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SkASSERT(node->fInvalObserverArray->find(this) < 0);
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node->fInvalObserverArray->push(this);
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}
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void Node::unobserveInval(const sk_sp<Node>& node) {
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SkASSERT(node);
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if (!(node->fFlags & kObserverArray_Flag)) {
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SkASSERT(node->fInvalObserver == this);
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node->fInvalObserver = nullptr;
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return;
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}
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const auto idx = node->fInvalObserverArray->find(this);
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SkASSERT(idx >= 0);
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node->fInvalObserverArray->remove(idx);
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}
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template <typename Func>
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void Node::forEachInvalObserver(Func&& func) const {
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if (fFlags & kObserverArray_Flag) {
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for (const auto& parent : *fInvalObserverArray) {
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func(parent);
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}
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return;
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}
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if (fInvalObserver) {
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func(fInvalObserver);
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}
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}
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void Node::invalidate(bool damageBubbling) {
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TRAVERSAL_GUARD;
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if (this->hasInval() && (!damageBubbling || (fFlags & kDamage_Flag))) {
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// All done.
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return;
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}
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if (damageBubbling && !(fInvalTraits & kBubbleDamage_Trait)) {
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// Found a damage observer.
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fFlags |= kDamage_Flag;
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damageBubbling = false;
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}
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fFlags |= kInvalidated_Flag;
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forEachInvalObserver([&](Node* observer) {
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observer->invalidate(damageBubbling);
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});
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}
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const SkRect& Node::revalidate(InvalidationController* ic, const SkMatrix& ctm) {
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TRAVERSAL_GUARD fBounds;
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if (!this->hasInval()) {
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return fBounds;
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}
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SkRect prevBounds;
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if (fFlags & kDamage_Flag) {
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prevBounds = fBounds;
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}
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fBounds = this->onRevalidate(ic, ctm);
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if (fFlags & kDamage_Flag) {
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ic->inval(prevBounds, ctm);
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if (fBounds != prevBounds) {
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ic->inval(fBounds, ctm);
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}
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}
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fFlags &= ~(kInvalidated_Flag | kDamage_Flag);
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return fBounds;
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}
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} // namespace sksg
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