libs/hwui/RenderNode.cpp - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "RenderNode.h"

 #include "DamageAccumulator.h"
 #include "Debug.h"
 #include "TreeInfo.h"
 #include "VectorDrawable.h"
 #include "renderstate/RenderState.h"
 #include "renderthread/CanvasContext.h"
 #include "utils/FatVector.h"
 #include "utils/MathUtils.h"
 #include "utils/StringUtils.h"
 #include "utils/TraceUtils.h"

 #include <SkPathOps.h>
 #include <algorithm>
 #include <atomic>
 #include <sstream>
 #include <string>

 namespace android {
 namespace uirenderer {

 // Used for tree mutations that are purely destructive.
 // Generic tree mutations should use MarkAndSweepObserver instead
 class ImmediateRemoved : public TreeObserver {
 public:
     explicit ImmediateRemoved(TreeInfo* info) : mTreeInfo(info) {}

     void onMaybeRemovedFromTree(RenderNode* node) override { node->onRemovedFromTree(mTreeInfo); }

 private:
     TreeInfo* mTreeInfo;
 };

 static int64_t generateId() {
     static std::atomic<int64_t> sNextId{1};
     return sNextId++;
 }

 RenderNode::RenderNode()
         : mUniqueId(generateId())
         , mDirtyPropertyFields(0)
         , mNeedsDisplayListSync(false)
         , mDisplayList(nullptr)
         , mStagingDisplayList(nullptr)
         , mAnimatorManager(*this)
         , mParentCount(0) {}

 RenderNode::~RenderNode() {
     ImmediateRemoved observer(nullptr);
     deleteDisplayList(observer);
     delete mStagingDisplayList;
     LOG_ALWAYS_FATAL_IF(hasLayer(), "layer missed detachment!");
 }

 void RenderNode::setStagingDisplayList(DisplayList* displayList) {
     mValid = (displayList != nullptr);
     mNeedsDisplayListSync = true;
     delete mStagingDisplayList;
     mStagingDisplayList = displayList;
 }

 /**
  * This function is a simplified version of replay(), where we simply retrieve and log the
  * display list. This function should remain in sync with the replay() function.
  */
 void RenderNode::output() {
     LogcatStream strout;
     strout << "Root";
     output(strout, 0);
 }

 void RenderNode::output(std::ostream& output, uint32_t level) {
     output << "  (" << getName() << " " << this
            << (MathUtils::isZero(properties().getAlpha()) ? ", zero alpha" : "")
            << (properties().hasShadow() ? ", casting shadow" : "")
            << (isRenderable() ? "" : ", empty")
            << (properties().getProjectBackwards() ? ", projected" : "")
            << (hasLayer() ? ", on HW Layer" : "") << ")" << std::endl;

     properties().debugOutputProperties(output, level + 1);

     if (mDisplayList) {
         mDisplayList->output(output, level);
     }
     output << std::string(level * 2, ' ') << "/RenderNode(" << getName() << " " << this << ")";
     output << std::endl;
 }

 int RenderNode::getDebugSize() {
     int size = sizeof(RenderNode);
     if (mStagingDisplayList) {
         size += mStagingDisplayList->getUsedSize();
     }
     if (mDisplayList && mDisplayList != mStagingDisplayList) {
         size += mDisplayList->getUsedSize();
     }
     return size;
 }

 void RenderNode::prepareTree(TreeInfo& info) {
     ATRACE_CALL();
     LOG_ALWAYS_FATAL_IF(!info.damageAccumulator, "DamageAccumulator missing");
     MarkAndSweepRemoved observer(&info);

     const int before = info.disableForceDark;
     prepareTreeImpl(observer, info, false);
     LOG_ALWAYS_FATAL_IF(before != info.disableForceDark, "Mis-matched force dark");
 }

 void RenderNode::addAnimator(const sp<BaseRenderNodeAnimator>& animator) {
     mAnimatorManager.addAnimator(animator);
 }

 void RenderNode::removeAnimator(const sp<BaseRenderNodeAnimator>& animator) {
     mAnimatorManager.removeAnimator(animator);
 }

 void RenderNode::damageSelf(TreeInfo& info) {
     if (isRenderable()) {
         if (properties().getClipDamageToBounds()) {
             info.damageAccumulator->dirty(0, 0, properties().getWidth(), properties().getHeight());
         } else {
             // Hope this is big enough?
             // TODO: Get this from the display list ops or something
             info.damageAccumulator->dirty(DIRTY_MIN, DIRTY_MIN, DIRTY_MAX, DIRTY_MAX);
         }
     }
 }

 void RenderNode::prepareLayer(TreeInfo& info, uint32_t dirtyMask) {
     LayerType layerType = properties().effectiveLayerType();
     if (CC_UNLIKELY(layerType == LayerType::RenderLayer)) {
         // Damage applied so far needs to affect our parent, but does not require
         // the layer to be updated. So we pop/push here to clear out the current
         // damage and get a clean state for display list or children updates to
         // affect, which will require the layer to be updated
         info.damageAccumulator->popTransform();
         info.damageAccumulator->pushTransform(this);
         if (dirtyMask & DISPLAY_LIST) {
             damageSelf(info);
         }
     }
 }

 void RenderNode::pushLayerUpdate(TreeInfo& info) {
     LayerType layerType = properties().effectiveLayerType();
     // If we are not a layer OR we cannot be rendered (eg, view was detached)
     // we need to destroy any Layers we may have had previously
     if (CC_LIKELY(layerType != LayerType::RenderLayer) || CC_UNLIKELY(!isRenderable()) ||
         CC_UNLIKELY(properties().getWidth() == 0) || CC_UNLIKELY(properties().getHeight() == 0) ||
         CC_UNLIKELY(!properties().fitsOnLayer())) {
         if (CC_UNLIKELY(hasLayer())) {
             this->setLayerSurface(nullptr);
         }
         return;
     }

     if (info.canvasContext.createOrUpdateLayer(this, *info.damageAccumulator, info.errorHandler)) {
         damageSelf(info);
     }

     if (!hasLayer()) {
         return;
     }

     SkRect dirty;
     info.damageAccumulator->peekAtDirty(&dirty);
     info.layerUpdateQueue->enqueueLayerWithDamage(this, dirty);

     // There might be prefetched layers that need to be accounted for.
     // That might be us, so tell CanvasContext that this layer is in the
     // tree and should not be destroyed.
     info.canvasContext.markLayerInUse(this);
 }

 /**
  * Traverse down the the draw tree to prepare for a frame.
  *
  * MODE_FULL = UI Thread-driven (thus properties must be synced), otherwise RT driven
  *
  * While traversing down the tree, functorsNeedLayer flag is set to true if anything that uses the
  * stencil buffer may be needed. Views that use a functor to draw will be forced onto a layer.
  */
 void RenderNode::prepareTreeImpl(TreeObserver& observer, TreeInfo& info, bool functorsNeedLayer) {
     info.damageAccumulator->pushTransform(this);

     if (info.mode == TreeInfo::MODE_FULL) {
         pushStagingPropertiesChanges(info);
     }

     if (!mProperties.getAllowForceDark()) {
         info.disableForceDark++;
     }

     uint32_t animatorDirtyMask = 0;
     if (CC_LIKELY(info.runAnimations)) {
         animatorDirtyMask = mAnimatorManager.animate(info);
     }

     bool willHaveFunctor = false;
     if (info.mode == TreeInfo::MODE_FULL && mStagingDisplayList) {
         willHaveFunctor = mStagingDisplayList->hasFunctor();
     } else if (mDisplayList) {
         willHaveFunctor = mDisplayList->hasFunctor();
     }
     bool childFunctorsNeedLayer =
             mProperties.prepareForFunctorPresence(willHaveFunctor, functorsNeedLayer);

     if (CC_UNLIKELY(mPositionListener.get())) {
         mPositionListener->onPositionUpdated(*this, info);
     }

     prepareLayer(info, animatorDirtyMask);
     if (info.mode == TreeInfo::MODE_FULL) {
         pushStagingDisplayListChanges(observer, info);
     }

     if (mDisplayList) {
         info.out.hasFunctors |= mDisplayList->hasFunctor();
         bool isDirty = mDisplayList->prepareListAndChildren(
                 observer, info, childFunctorsNeedLayer,
                 [](RenderNode* child, TreeObserver& observer, TreeInfo& info,
                    bool functorsNeedLayer) {
                     child->prepareTreeImpl(observer, info, functorsNeedLayer);
                 });
         if (isDirty) {
             damageSelf(info);
         }
     }
     pushLayerUpdate(info);

     if (!mProperties.getAllowForceDark()) {
         info.disableForceDark--;
     }
     info.damageAccumulator->popTransform();
 }

 void RenderNode::syncProperties() {
     mProperties = mStagingProperties;
 }

 void RenderNode::pushStagingPropertiesChanges(TreeInfo& info) {
     // Push the animators first so that setupStartValueIfNecessary() is called
     // before properties() is trampled by stagingProperties(), as they are
     // required by some animators.
     if (CC_LIKELY(info.runAnimations)) {
         mAnimatorManager.pushStaging();
     }
     if (mDirtyPropertyFields) {
         mDirtyPropertyFields = 0;
         damageSelf(info);
         info.damageAccumulator->popTransform();
         syncProperties();
         // We could try to be clever and only re-damage if the matrix changed.
         // However, we don't need to worry about that. The cost of over-damaging
         // here is only going to be a single additional map rect of this node
         // plus a rect join(). The parent's transform (and up) will only be
         // performed once.
         info.damageAccumulator->pushTransform(this);
         damageSelf(info);
     }
 }

 void RenderNode::syncDisplayList(TreeObserver& observer, TreeInfo* info) {
     // Make sure we inc first so that we don't fluctuate between 0 and 1,
     // which would thrash the layer cache
     if (mStagingDisplayList) {
         mStagingDisplayList->updateChildren([](RenderNode* child) { child->incParentRefCount(); });
     }
     deleteDisplayList(observer, info);
     mDisplayList = mStagingDisplayList;
     mStagingDisplayList = nullptr;
     if (mDisplayList) {
         mDisplayList->syncContents();
         handleForceDark(info);
     }
 }

 void RenderNode::handleForceDark(android::uirenderer::TreeInfo *info) {
     if (CC_LIKELY(!info || info->disableForceDark)) {
         return;
     }
     auto usage = usageHint();
     const auto& children = mDisplayList->mChildNodes;
     if (mDisplayList->hasText()) {
         usage = UsageHint::Foreground;
     }
     if (usage == UsageHint::Unknown) {
         if (children.size() > 1) {
             usage = UsageHint::Background;
         } else if (children.size() == 1 &&
                 children.front().getRenderNode()->usageHint() !=
                         UsageHint::Background) {
             usage = UsageHint::Background;
         }
     }
     if (children.size() > 1) {
         // Crude overlap check
         SkRect drawn = SkRect::MakeEmpty();
         for (auto iter = children.rbegin(); iter != children.rend(); ++iter) {
             const auto& child = iter->getRenderNode();
             // We use stagingProperties here because we haven't yet sync'd the children
             SkRect bounds = SkRect::MakeXYWH(child->stagingProperties().getX(), child->stagingProperties().getY(),
                     child->stagingProperties().getWidth(), child->stagingProperties().getHeight());
             if (bounds.contains(drawn)) {
                 // This contains everything drawn after it, so make it a background
                 child->setUsageHint(UsageHint::Background);
             }
             drawn.join(bounds);
         }
     }
     mDisplayList->mDisplayList.applyColorTransform(
             usage == UsageHint::Background ? ColorTransform::Dark : ColorTransform::Light);
 }

 void RenderNode::pushStagingDisplayListChanges(TreeObserver& observer, TreeInfo& info) {
     if (mNeedsDisplayListSync) {
         mNeedsDisplayListSync = false;
         // Damage with the old display list first then the new one to catch any
         // changes in isRenderable or, in the future, bounds
         damageSelf(info);
         syncDisplayList(observer, &info);
         damageSelf(info);
     }
 }

 void RenderNode::deleteDisplayList(TreeObserver& observer, TreeInfo* info) {
     if (mDisplayList) {
         mDisplayList->updateChildren(
                 [&observer, info](RenderNode* child) { child->decParentRefCount(observer, info); });
         if (!mDisplayList->reuseDisplayList(this, info ? &info->canvasContext : nullptr)) {
             delete mDisplayList;
         }
     }
     mDisplayList = nullptr;
 }

 void RenderNode::destroyHardwareResources(TreeInfo* info) {
     if (hasLayer()) {
         this->setLayerSurface(nullptr);
     }
     setStagingDisplayList(nullptr);

     ImmediateRemoved observer(info);
     deleteDisplayList(observer, info);
 }

 void RenderNode::destroyLayers() {
     if (hasLayer()) {
         this->setLayerSurface(nullptr);
     }
     if (mDisplayList) {
         mDisplayList->updateChildren([](RenderNode* child) { child->destroyLayers(); });
     }
 }

 void RenderNode::decParentRefCount(TreeObserver& observer, TreeInfo* info) {
     LOG_ALWAYS_FATAL_IF(!mParentCount, "already 0!");
     mParentCount--;
     if (!mParentCount) {
         observer.onMaybeRemovedFromTree(this);
         if (CC_UNLIKELY(mPositionListener.get())) {
             mPositionListener->onPositionLost(*this, info);
         }
     }
 }

 void RenderNode::onRemovedFromTree(TreeInfo* info) {
     destroyHardwareResources(info);
 }

 void RenderNode::clearRoot() {
     ImmediateRemoved observer(nullptr);
     decParentRefCount(observer);
 }

 /**
  * Apply property-based transformations to input matrix
  *
  * If true3dTransform is set to true, the transform applied to the input matrix will use true 4x4
  * matrix computation instead of the Skia 3x3 matrix + camera hackery.
  */
 void RenderNode::applyViewPropertyTransforms(mat4& matrix, bool true3dTransform) const {
     if (properties().getLeft() != 0 || properties().getTop() != 0) {
         matrix.translate(properties().getLeft(), properties().getTop());
     }
     if (properties().getStaticMatrix()) {
         mat4 stat(*properties().getStaticMatrix());
         matrix.multiply(stat);
     } else if (properties().getAnimationMatrix()) {
         mat4 anim(*properties().getAnimationMatrix());
         matrix.multiply(anim);
     }

     bool applyTranslationZ = true3dTransform && !MathUtils::isZero(properties().getZ());
     if (properties().hasTransformMatrix() || applyTranslationZ) {
         if (properties().isTransformTranslateOnly()) {
             matrix.translate(properties().getTranslationX(), properties().getTranslationY(),
                              true3dTransform ? properties().getZ() : 0.0f);
         } else {
             if (!true3dTransform) {
                 matrix.multiply(*properties().getTransformMatrix());
             } else {
                 mat4 true3dMat;
                 true3dMat.loadTranslate(properties().getPivotX() + properties().getTranslationX(),
                                         properties().getPivotY() + properties().getTranslationY(),
                                         properties().getZ());
                 true3dMat.rotate(properties().getRotationX(), 1, 0, 0);
                 true3dMat.rotate(properties().getRotationY(), 0, 1, 0);
                 true3dMat.rotate(properties().getRotation(), 0, 0, 1);
                 true3dMat.scale(properties().getScaleX(), properties().getScaleY(), 1);
                 true3dMat.translate(-properties().getPivotX(), -properties().getPivotY());

                 matrix.multiply(true3dMat);
             }
         }
     }
 }

 const SkPath* RenderNode::getClippedOutline(const SkRect& clipRect) const {
     const SkPath* outlinePath = properties().getOutline().getPath();
     const uint32_t outlineID = outlinePath->getGenerationID();

     if (outlineID != mClippedOutlineCache.outlineID || clipRect != mClippedOutlineCache.clipRect) {
         // update the cache keys
         mClippedOutlineCache.outlineID = outlineID;
         mClippedOutlineCache.clipRect = clipRect;

         // update the cache value by recomputing a new path
         SkPath clipPath;
         clipPath.addRect(clipRect);
         Op(*outlinePath, clipPath, kIntersect_SkPathOp, &mClippedOutlineCache.clippedOutline);
     }
     return &mClippedOutlineCache.clippedOutline;
 }

 using StringBuffer = FatVector<char, 128>;

 template <typename... T>
 static void format(StringBuffer& buffer, const std::string_view& format, T... args) {
     buffer.resize(buffer.capacity());
     while (1) {
         int needed = snprintf(buffer.data(), buffer.size(),
                 format.data(), std::forward<T>(args)...);
         if (needed < 0) {
             buffer[0] = '\0';
             buffer.resize(1);
             return;
         }
         if (needed < buffer.size()) {
             buffer.resize(needed + 1);
             return;
         }
         buffer.resize(buffer.size() * 2);
     }
 }

 void RenderNode::markDrawStart(SkCanvas& canvas) {
     StringBuffer buffer;
     format(buffer, "RenderNode(id=%d, name='%s')", uniqueId(), getName());
     canvas.drawAnnotation(SkRect::MakeWH(getWidth(), getHeight()), buffer.data(), nullptr);
 }

 void RenderNode::markDrawEnd(SkCanvas& canvas) {
     StringBuffer buffer;
     format(buffer, "/RenderNode(id=%d, name='%s')", uniqueId(), getName());
     canvas.drawAnnotation(SkRect::MakeWH(getWidth(), getHeight()), buffer.data(), nullptr);
 }

 } /* namespace uirenderer */
 } /* namespace android */
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "RenderNode.h"

	#include "DamageAccumulator.h"
	#include "Debug.h"
	#include "TreeInfo.h"
	#include "VectorDrawable.h"
	#include "renderstate/RenderState.h"
	#include "renderthread/CanvasContext.h"
	#include "utils/FatVector.h"
	#include "utils/MathUtils.h"
	#include "utils/StringUtils.h"
	#include "utils/TraceUtils.h"

	#include <SkPathOps.h>
	#include <algorithm>
	#include <atomic>
	#include <sstream>
	#include <string>

	namespace android {
	namespace uirenderer {

	// Used for tree mutations that are purely destructive.
	// Generic tree mutations should use MarkAndSweepObserver instead
	class ImmediateRemoved : public TreeObserver {
	public:
	explicit ImmediateRemoved(TreeInfo* info) : mTreeInfo(info) {}

	void onMaybeRemovedFromTree(RenderNode* node) override { node->onRemovedFromTree(mTreeInfo); }

	private:
	TreeInfo* mTreeInfo;
	};

	static int64_t generateId() {
	static std::atomic<int64_t> sNextId{1};
	return sNextId++;
	}

	RenderNode::RenderNode()
	: mUniqueId(generateId())
	, mDirtyPropertyFields(0)
	, mNeedsDisplayListSync(false)
	, mDisplayList(nullptr)
	, mStagingDisplayList(nullptr)
	, mAnimatorManager(*this)
	, mParentCount(0) {}

	RenderNode::~RenderNode() {
	ImmediateRemoved observer(nullptr);
	deleteDisplayList(observer);
	delete mStagingDisplayList;
	LOG_ALWAYS_FATAL_IF(hasLayer(), "layer missed detachment!");
	}

	void RenderNode::setStagingDisplayList(DisplayList* displayList) {
	mValid = (displayList != nullptr);
	mNeedsDisplayListSync = true;
	delete mStagingDisplayList;
	mStagingDisplayList = displayList;
	}

	/**
	* This function is a simplified version of replay(), where we simply retrieve and log the
	* display list. This function should remain in sync with the replay() function.
	*/
	void RenderNode::output() {
	LogcatStream strout;
	strout << "Root";
	output(strout, 0);
	}

	void RenderNode::output(std::ostream& output, uint32_t level) {
	output << " (" << getName() << " " << this
	<< (MathUtils::isZero(properties().getAlpha()) ? ", zero alpha" : "")
	<< (properties().hasShadow() ? ", casting shadow" : "")
	<< (isRenderable() ? "" : ", empty")
	<< (properties().getProjectBackwards() ? ", projected" : "")
	<< (hasLayer() ? ", on HW Layer" : "") << ")" << std::endl;

	properties().debugOutputProperties(output, level + 1);

	if (mDisplayList) {
	mDisplayList->output(output, level);
	}
	output << std::string(level * 2, ' ') << "/RenderNode(" << getName() << " " << this << ")";
	output << std::endl;
	}

	int RenderNode::getDebugSize() {
	int size = sizeof(RenderNode);
	if (mStagingDisplayList) {
	size += mStagingDisplayList->getUsedSize();
	}
	if (mDisplayList && mDisplayList != mStagingDisplayList) {
	size += mDisplayList->getUsedSize();
	}
	return size;
	}

	void RenderNode::prepareTree(TreeInfo& info) {
	ATRACE_CALL();
	LOG_ALWAYS_FATAL_IF(!info.damageAccumulator, "DamageAccumulator missing");
	MarkAndSweepRemoved observer(&info);

	const int before = info.disableForceDark;
	prepareTreeImpl(observer, info, false);
	LOG_ALWAYS_FATAL_IF(before != info.disableForceDark, "Mis-matched force dark");
	}

	void RenderNode::addAnimator(const sp<BaseRenderNodeAnimator>& animator) {
	mAnimatorManager.addAnimator(animator);
	}

	void RenderNode::removeAnimator(const sp<BaseRenderNodeAnimator>& animator) {
	mAnimatorManager.removeAnimator(animator);
	}

	void RenderNode::damageSelf(TreeInfo& info) {
	if (isRenderable()) {
	if (properties().getClipDamageToBounds()) {
	info.damageAccumulator->dirty(0, 0, properties().getWidth(), properties().getHeight());
	} else {
	// Hope this is big enough?
	// TODO: Get this from the display list ops or something
	info.damageAccumulator->dirty(DIRTY_MIN, DIRTY_MIN, DIRTY_MAX, DIRTY_MAX);
	}
	}
	}

	void RenderNode::prepareLayer(TreeInfo& info, uint32_t dirtyMask) {
	LayerType layerType = properties().effectiveLayerType();
	if (CC_UNLIKELY(layerType == LayerType::RenderLayer)) {
	// Damage applied so far needs to affect our parent, but does not require
	// the layer to be updated. So we pop/push here to clear out the current
	// damage and get a clean state for display list or children updates to
	// affect, which will require the layer to be updated
	info.damageAccumulator->popTransform();
	info.damageAccumulator->pushTransform(this);
	if (dirtyMask & DISPLAY_LIST) {
	damageSelf(info);
	}
	}
	}

	void RenderNode::pushLayerUpdate(TreeInfo& info) {
	LayerType layerType = properties().effectiveLayerType();
	// If we are not a layer OR we cannot be rendered (eg, view was detached)
	// we need to destroy any Layers we may have had previously
	if (CC_LIKELY(layerType != LayerType::RenderLayer) \|\| CC_UNLIKELY(!isRenderable()) \|\|
	CC_UNLIKELY(properties().getWidth() == 0) \|\| CC_UNLIKELY(properties().getHeight() == 0) \|\|
	CC_UNLIKELY(!properties().fitsOnLayer())) {
	if (CC_UNLIKELY(hasLayer())) {
	this->setLayerSurface(nullptr);
	}
	return;
	}

	if (info.canvasContext.createOrUpdateLayer(this, *info.damageAccumulator, info.errorHandler)) {
	damageSelf(info);
	}

	if (!hasLayer()) {
	return;
	}

	SkRect dirty;
	info.damageAccumulator->peekAtDirty(&dirty);
	info.layerUpdateQueue->enqueueLayerWithDamage(this, dirty);

	// There might be prefetched layers that need to be accounted for.
	// That might be us, so tell CanvasContext that this layer is in the
	// tree and should not be destroyed.
	info.canvasContext.markLayerInUse(this);
	}

	/**
	* Traverse down the the draw tree to prepare for a frame.
	*
	* MODE_FULL = UI Thread-driven (thus properties must be synced), otherwise RT driven
	*
	* While traversing down the tree, functorsNeedLayer flag is set to true if anything that uses the
	* stencil buffer may be needed. Views that use a functor to draw will be forced onto a layer.
	*/
	void RenderNode::prepareTreeImpl(TreeObserver& observer, TreeInfo& info, bool functorsNeedLayer) {
	info.damageAccumulator->pushTransform(this);

	if (info.mode == TreeInfo::MODE_FULL) {
	pushStagingPropertiesChanges(info);
	}

	if (!mProperties.getAllowForceDark()) {
	info.disableForceDark++;
	}

	uint32_t animatorDirtyMask = 0;
	if (CC_LIKELY(info.runAnimations)) {
	animatorDirtyMask = mAnimatorManager.animate(info);
	}

	bool willHaveFunctor = false;
	if (info.mode == TreeInfo::MODE_FULL && mStagingDisplayList) {
	willHaveFunctor = mStagingDisplayList->hasFunctor();
	} else if (mDisplayList) {
	willHaveFunctor = mDisplayList->hasFunctor();
	}
	bool childFunctorsNeedLayer =
	mProperties.prepareForFunctorPresence(willHaveFunctor, functorsNeedLayer);

	if (CC_UNLIKELY(mPositionListener.get())) {
	mPositionListener->onPositionUpdated(*this, info);
	}

	prepareLayer(info, animatorDirtyMask);
	if (info.mode == TreeInfo::MODE_FULL) {
	pushStagingDisplayListChanges(observer, info);
	}

	if (mDisplayList) {
	info.out.hasFunctors \|= mDisplayList->hasFunctor();
	bool isDirty = mDisplayList->prepareListAndChildren(
	observer, info, childFunctorsNeedLayer,
	[](RenderNode* child, TreeObserver& observer, TreeInfo& info,
	bool functorsNeedLayer) {
	child->prepareTreeImpl(observer, info, functorsNeedLayer);
	});
	if (isDirty) {
	damageSelf(info);
	}
	}
	pushLayerUpdate(info);

	if (!mProperties.getAllowForceDark()) {
	info.disableForceDark--;
	}
	info.damageAccumulator->popTransform();
	}

	void RenderNode::syncProperties() {
	mProperties = mStagingProperties;
	}

	void RenderNode::pushStagingPropertiesChanges(TreeInfo& info) {
	// Push the animators first so that setupStartValueIfNecessary() is called
	// before properties() is trampled by stagingProperties(), as they are
	// required by some animators.
	if (CC_LIKELY(info.runAnimations)) {
	mAnimatorManager.pushStaging();
	}
	if (mDirtyPropertyFields) {
	mDirtyPropertyFields = 0;
	damageSelf(info);
	info.damageAccumulator->popTransform();
	syncProperties();
	// We could try to be clever and only re-damage if the matrix changed.
	// However, we don't need to worry about that. The cost of over-damaging
	// here is only going to be a single additional map rect of this node
	// plus a rect join(). The parent's transform (and up) will only be
	// performed once.
	info.damageAccumulator->pushTransform(this);
	damageSelf(info);
	}
	}

	void RenderNode::syncDisplayList(TreeObserver& observer, TreeInfo* info) {
	// Make sure we inc first so that we don't fluctuate between 0 and 1,
	// which would thrash the layer cache
	if (mStagingDisplayList) {
	mStagingDisplayList->updateChildren([](RenderNode* child) { child->incParentRefCount(); });
	}
	deleteDisplayList(observer, info);
	mDisplayList = mStagingDisplayList;
	mStagingDisplayList = nullptr;
	if (mDisplayList) {
	mDisplayList->syncContents();
	handleForceDark(info);
	}
	}

	void RenderNode::handleForceDark(android::uirenderer::TreeInfo *info) {
	if (CC_LIKELY(!info \|\| info->disableForceDark)) {
	return;
	}
	auto usage = usageHint();
	const auto& children = mDisplayList->mChildNodes;
	if (mDisplayList->hasText()) {
	usage = UsageHint::Foreground;
	}
	if (usage == UsageHint::Unknown) {
	if (children.size() > 1) {
	usage = UsageHint::Background;
	} else if (children.size() == 1 &&
	children.front().getRenderNode()->usageHint() !=
	UsageHint::Background) {
	usage = UsageHint::Background;
	}
	}
	if (children.size() > 1) {
	// Crude overlap check
	SkRect drawn = SkRect::MakeEmpty();
	for (auto iter = children.rbegin(); iter != children.rend(); ++iter) {
	const auto& child = iter->getRenderNode();
	// We use stagingProperties here because we haven't yet sync'd the children
	SkRect bounds = SkRect::MakeXYWH(child->stagingProperties().getX(), child->stagingProperties().getY(),
	child->stagingProperties().getWidth(), child->stagingProperties().getHeight());
	if (bounds.contains(drawn)) {
	// This contains everything drawn after it, so make it a background
	child->setUsageHint(UsageHint::Background);
	}
	drawn.join(bounds);
	}
	}
	mDisplayList->mDisplayList.applyColorTransform(
	usage == UsageHint::Background ? ColorTransform::Dark : ColorTransform::Light);
	}

	void RenderNode::pushStagingDisplayListChanges(TreeObserver& observer, TreeInfo& info) {
	if (mNeedsDisplayListSync) {
	mNeedsDisplayListSync = false;
	// Damage with the old display list first then the new one to catch any
	// changes in isRenderable or, in the future, bounds
	damageSelf(info);
	syncDisplayList(observer, &info);
	damageSelf(info);
	}
	}

	void RenderNode::deleteDisplayList(TreeObserver& observer, TreeInfo* info) {
	if (mDisplayList) {
	mDisplayList->updateChildren(
	[&observer, info](RenderNode* child) { child->decParentRefCount(observer, info); });
	if (!mDisplayList->reuseDisplayList(this, info ? &info->canvasContext : nullptr)) {
	delete mDisplayList;
	}
	}
	mDisplayList = nullptr;
	}

	void RenderNode::destroyHardwareResources(TreeInfo* info) {
	if (hasLayer()) {
	this->setLayerSurface(nullptr);
	}
	setStagingDisplayList(nullptr);

	ImmediateRemoved observer(info);
	deleteDisplayList(observer, info);
	}

	void RenderNode::destroyLayers() {
	if (hasLayer()) {
	this->setLayerSurface(nullptr);
	}
	if (mDisplayList) {
	mDisplayList->updateChildren([](RenderNode* child) { child->destroyLayers(); });
	}
	}

	void RenderNode::decParentRefCount(TreeObserver& observer, TreeInfo* info) {
	LOG_ALWAYS_FATAL_IF(!mParentCount, "already 0!");
	mParentCount--;
	if (!mParentCount) {
	observer.onMaybeRemovedFromTree(this);
	if (CC_UNLIKELY(mPositionListener.get())) {
	mPositionListener->onPositionLost(*this, info);
	}
	}
	}

	void RenderNode::onRemovedFromTree(TreeInfo* info) {
	destroyHardwareResources(info);
	}

	void RenderNode::clearRoot() {
	ImmediateRemoved observer(nullptr);
	decParentRefCount(observer);
	}

	/**
	* Apply property-based transformations to input matrix
	*
	* If true3dTransform is set to true, the transform applied to the input matrix will use true 4x4
	* matrix computation instead of the Skia 3x3 matrix + camera hackery.
	*/
	void RenderNode::applyViewPropertyTransforms(mat4& matrix, bool true3dTransform) const {
	if (properties().getLeft() != 0 \|\| properties().getTop() != 0) {
	matrix.translate(properties().getLeft(), properties().getTop());
	}
	if (properties().getStaticMatrix()) {
	mat4 stat(*properties().getStaticMatrix());
	matrix.multiply(stat);
	} else if (properties().getAnimationMatrix()) {
	mat4 anim(*properties().getAnimationMatrix());
	matrix.multiply(anim);
	}

	bool applyTranslationZ = true3dTransform && !MathUtils::isZero(properties().getZ());
	if (properties().hasTransformMatrix() \|\| applyTranslationZ) {
	if (properties().isTransformTranslateOnly()) {
	matrix.translate(properties().getTranslationX(), properties().getTranslationY(),
	true3dTransform ? properties().getZ() : 0.0f);
	} else {
	if (!true3dTransform) {
	matrix.multiply(*properties().getTransformMatrix());
	} else {
	mat4 true3dMat;
	true3dMat.loadTranslate(properties().getPivotX() + properties().getTranslationX(),
	properties().getPivotY() + properties().getTranslationY(),
	properties().getZ());
	true3dMat.rotate(properties().getRotationX(), 1, 0, 0);
	true3dMat.rotate(properties().getRotationY(), 0, 1, 0);
	true3dMat.rotate(properties().getRotation(), 0, 0, 1);
	true3dMat.scale(properties().getScaleX(), properties().getScaleY(), 1);
	true3dMat.translate(-properties().getPivotX(), -properties().getPivotY());

	matrix.multiply(true3dMat);
	}
	}
	}
	}

	const SkPath* RenderNode::getClippedOutline(const SkRect& clipRect) const {
	const SkPath* outlinePath = properties().getOutline().getPath();
	const uint32_t outlineID = outlinePath->getGenerationID();

	if (outlineID != mClippedOutlineCache.outlineID \|\| clipRect != mClippedOutlineCache.clipRect) {
	// update the cache keys
	mClippedOutlineCache.outlineID = outlineID;
	mClippedOutlineCache.clipRect = clipRect;

	// update the cache value by recomputing a new path
	SkPath clipPath;
	clipPath.addRect(clipRect);
	Op(*outlinePath, clipPath, kIntersect_SkPathOp, &mClippedOutlineCache.clippedOutline);
	}
	return &mClippedOutlineCache.clippedOutline;
	}

	using StringBuffer = FatVector<char, 128>;

	template <typename... T>
	static void format(StringBuffer& buffer, const std::string_view& format, T... args) {
	buffer.resize(buffer.capacity());
	while (1) {
	int needed = snprintf(buffer.data(), buffer.size(),
	format.data(), std::forward<T>(args)...);
	if (needed < 0) {
	buffer[0] = '\0';
	buffer.resize(1);
	return;
	}
	if (needed < buffer.size()) {
	buffer.resize(needed + 1);
	return;
	}
	buffer.resize(buffer.size() * 2);
	}
	}

	void RenderNode::markDrawStart(SkCanvas& canvas) {
	StringBuffer buffer;
	format(buffer, "RenderNode(id=%d, name='%s')", uniqueId(), getName());
	canvas.drawAnnotation(SkRect::MakeWH(getWidth(), getHeight()), buffer.data(), nullptr);
	}

	void RenderNode::markDrawEnd(SkCanvas& canvas) {
	StringBuffer buffer;
	format(buffer, "/RenderNode(id=%d, name='%s')", uniqueId(), getName());
	canvas.drawAnnotation(SkRect::MakeWH(getWidth(), getHeight()), buffer.data(), nullptr);
	}

	} /* namespace uirenderer */
	} /* namespace android */