0ebf4192f1
Node subclasses can now control whether their bounds (changes)
contribute to damage.
Tristate:
* Default: The node bounds contribute to damage if the node itself was
invalidated, observing hasSelfInval(). This is the default
behavior.
* ForceSelf: The node bounds contribute to damage, regardless of
hasSelfInval(). Used for domain-boundary nodes (e.g. Draw),
which gate blocked fragments (e.g. geometry, paint nodes).
* BlockSelf: The node bounds do not contribute to damage, regardless of
hasSelfInval(). Used for nodes which do not contribute
damage directly (e.g. paints, geometry).
TBR=
Change-Id: I7c941c7ea12e14b008d846ec13108e66e34dbc73
Reviewed-on: https://skia-review.googlesource.com/91104
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
150 lines
3.4 KiB
C++
150 lines
3.4 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 "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()
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: fInvalReceiver(nullptr)
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, fBounds(SkRect::MakeLargestS32())
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, fFlags(kInvalSelf_Flag | kInvalDescendant_Flag) {}
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Node::~Node() {
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if (fFlags & kReceiverArray_Flag) {
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SkASSERT(fInvalReceiverArray->isEmpty());
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delete fInvalReceiverArray;
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} else {
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SkASSERT(!fInvalReceiver);
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}
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}
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void Node::addInvalReceiver(Node* receiver) {
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if (!(fFlags & kReceiverArray_Flag)) {
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if (!fInvalReceiver) {
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fInvalReceiver = receiver;
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return;
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}
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auto receivers = new SkTDArray<Node*>();
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receivers->setReserve(2);
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receivers->push(fInvalReceiver);
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fInvalReceiverArray = receivers;
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fFlags |= kReceiverArray_Flag;
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}
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// No duplicate receivers.
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SkASSERT(fInvalReceiverArray->find(receiver) < 0);
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fInvalReceiverArray->push(receiver);
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}
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void Node::removeInvalReceiver(Node* receiver) {
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if (!(fFlags & kReceiverArray_Flag)) {
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SkASSERT(fInvalReceiver == receiver);
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fInvalReceiver = nullptr;
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return;
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}
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const auto idx = fInvalReceiverArray->find(receiver);
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SkASSERT(idx >= 0);
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fInvalReceiverArray->remove(idx);
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}
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template <typename Func>
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void Node::forEachInvalReceiver(Func&& func) const {
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if (fFlags & kReceiverArray_Flag) {
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for (const auto& parent : *fInvalReceiverArray) {
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func(parent);
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}
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return;
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}
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if (fInvalReceiver) {
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func(fInvalReceiver);
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}
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}
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void Node::invalidateSelf() {
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if (this->hasSelfInval()) {
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return;
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}
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fFlags |= kInvalSelf_Flag;
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this->invalidateAncestors();
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}
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void Node::invalidateAncestors() {
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TRAVERSAL_GUARD;
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forEachInvalReceiver([&](Node* receiver) {
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if (receiver->hasDescendantInval()) {
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return;
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}
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receiver->fFlags |= kInvalDescendant_Flag;
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receiver->invalidateAncestors();
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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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const auto result = this->onRevalidate(ic, ctm);
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const auto selfDamage = result.fReval == Damage::kForceSelf ||
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(this->hasSelfInval() && result.fReval != Damage::kBlockSelf);
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if (selfDamage) {
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// old bounds
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ic->inval(fBounds, ctm);
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if (result.fBounds != fBounds) {
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// new bounds
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ic->inval(result.fBounds, ctm);
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}
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}
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fBounds = result.fBounds;
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fFlags &= ~(kInvalSelf_Flag | kInvalDescendant_Flag);
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return fBounds;
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}
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} // namespace sksg
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