Merge pi-dev-plus-aosp-without-vendor into stage-aosp-master

Bug: 79597307
Change-Id: I6d6bee71b9424eb478780bbfc06b830eb8ded342

1 files changed, 590 insertions, 1391 deletions

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 97c56b3542..2595ec1a05 100755..100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -19,10 +19,11 @@
 #define LOG_TAG "Layer"
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
-#include <stdlib.h>
+#include <math.h>
 #include <stdint.h>
+#include <stdlib.h>
 #include <sys/types.h>
-#include <math.h>
+#include <algorithm>
 
 #include <cutils/compiler.h>
 #include <cutils/native_handle.h>
@@ -39,41 +40,43 @@
 #include <ui/PixelFormat.h>
 
 #include <gui/BufferItem.h>
-#include <gui/BufferQueue.h>
 #include <gui/LayerDebugInfo.h>
 #include <gui/Surface.h>
 
-#include "clz.h"
+#include "BufferLayer.h"
 #include "Colorizer.h"
 #include "DisplayDevice.h"
 #include "Layer.h"
 #include "LayerRejecter.h"
 #include "MonitoredProducer.h"
 #include "SurfaceFlinger.h"
+#include "clz.h"
 
 #include "DisplayHardware/HWComposer.h"
 
 #include "RenderEngine/RenderEngine.h"
 
 #include <mutex>
+#include "LayerProtoHelper.h"
 
-#define DEBUG_RESIZE    0
+#define DEBUG_RESIZE 0
 
 namespace android {
 
-// ---------------------------------------------------------------------------
+LayerBE::LayerBE()
+      : mMesh(Mesh::TRIANGLE_FAN, 4, 2, 2) {
+}
+
 
 int32_t Layer::sSequence = 1;
 
-Layer::Layer(SurfaceFlinger* flinger, const sp<Client>& client,
-        const String8& name, uint32_t w, uint32_t h, uint32_t flags)
-    :   contentDirty(false),
+Layer::Layer(SurfaceFlinger* flinger, const sp<Client>& client, const String8& name, uint32_t w,
+             uint32_t h, uint32_t flags)
+      : contentDirty(false),
         sequence(uint32_t(android_atomic_inc(&sSequence))),
         mFlinger(flinger),
-        mTextureName(UINT32_MAX),
         mPremultipliedAlpha(true),
-        mName("unnamed"),
-        mFormat(PIXEL_FORMAT_NONE),
+        mName(name),
         mTransactionFlags(0),
         mPendingStateMutex(),
         mPendingStates(),
@@ -81,86 +84,55 @@ Layer::Layer(SurfaceFlinger* flinger, const sp<Client>& client,
         mSidebandStreamChanged(false),
         mActiveBufferSlot(BufferQueue::INVALID_BUFFER_SLOT),
         mCurrentTransform(0),
-        mCurrentScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
         mOverrideScalingMode(-1),
         mCurrentOpacity(true),
-        mBufferLatched(false),
         mCurrentFrameNumber(0),
-        mPreviousFrameNumber(0),
-        mRefreshPending(false),
         mFrameLatencyNeeded(false),
         mFiltering(false),
         mNeedsFiltering(false),
-        mMesh(Mesh::TRIANGLE_FAN, 4, 2, 2),
-#ifndef USE_HWC2
-        mIsGlesComposition(false),
-#endif
         mProtectedByApp(false),
-        mHasSurface(false),
         mClientRef(client),
         mPotentialCursor(false),
         mQueueItemLock(),
         mQueueItemCondition(),
         mQueueItems(),
         mLastFrameNumberReceived(0),
-        mUpdateTexImageFailed(false),
         mAutoRefresh(false),
-        mFreezeGeometryUpdates(false)
-{
-#ifdef USE_HWC2
-    ALOGV("Creating Layer %s", name.string());
-#endif
-
+        mFreezeGeometryUpdates(false),
+        mCurrentChildren(LayerVector::StateSet::Current),
+        mDrawingChildren(LayerVector::StateSet::Drawing) {
     mCurrentCrop.makeInvalid();
-    mFlinger->getRenderEngine().genTextures(1, &mTextureName);
-    mTexture.init(Texture::TEXTURE_EXTERNAL, mTextureName);
 
     uint32_t layerFlags = 0;
-    if (flags & ISurfaceComposerClient::eHidden)
-        layerFlags |= layer_state_t::eLayerHidden;
-    if (flags & ISurfaceComposerClient::eOpaque)
-        layerFlags |= layer_state_t::eLayerOpaque;
-    if (flags & ISurfaceComposerClient::eSecure)
-        layerFlags |= layer_state_t::eLayerSecure;
-
-    if (flags & ISurfaceComposerClient::eNonPremultiplied)
-        mPremultipliedAlpha = false;
+    if (flags & ISurfaceComposerClient::eHidden) layerFlags |= layer_state_t::eLayerHidden;
+    if (flags & ISurfaceComposerClient::eOpaque) layerFlags |= layer_state_t::eLayerOpaque;
+    if (flags & ISurfaceComposerClient::eSecure) layerFlags |= layer_state_t::eLayerSecure;
 
     mName = name;
     mTransactionName = String8("TX - ") + mName;
 
     mCurrentState.active.w = w;
     mCurrentState.active.h = h;
+    mCurrentState.flags = layerFlags;
     mCurrentState.active.transform.set(0, 0);
     mCurrentState.crop.makeInvalid();
     mCurrentState.finalCrop.makeInvalid();
     mCurrentState.requestedFinalCrop = mCurrentState.finalCrop;
     mCurrentState.requestedCrop = mCurrentState.crop;
     mCurrentState.z = 0;
-#ifdef USE_HWC2
-    mCurrentState.alpha = 1.0f;
-#else
-    mCurrentState.alpha = 0xFF;
-#endif
+    mCurrentState.color.a = 1.0f;
     mCurrentState.layerStack = 0;
-    mCurrentState.flags = layerFlags;
     mCurrentState.sequence = 0;
     mCurrentState.requested = mCurrentState.active;
-    mCurrentState.dataSpace = HAL_DATASPACE_UNKNOWN;
     mCurrentState.appId = 0;
     mCurrentState.type = 0;
 
     // drawing state & current state are identical
     mDrawingState = mCurrentState;
 
-#ifdef USE_HWC2
     const auto& hwc = flinger->getHwComposer();
     const auto& activeConfig = hwc.getActiveConfig(HWC_DISPLAY_PRIMARY);
     nsecs_t displayPeriod = activeConfig->getVsyncPeriod();
-#else
-    nsecs_t displayPeriod =
-            flinger->getHwComposer().getRefreshPeriod(HWC_DISPLAY_PRIMARY);
-#endif
     mFrameTracker.setDisplayRefreshPeriod(displayPeriod);
 
     CompositorTiming compositorTiming;
@@ -168,27 +140,10 @@ Layer::Layer(SurfaceFlinger* flinger, const sp<Client>& client,
     mFrameEventHistory.initializeCompositorTiming(compositorTiming);
 }
 
-void Layer::onFirstRef() {
-    // Creates a custom BufferQueue for SurfaceFlingerConsumer to use
-    sp<IGraphicBufferProducer> producer;
-    sp<IGraphicBufferConsumer> consumer;
-    BufferQueue::createBufferQueue(&producer, &consumer, true);
-    mProducer = new MonitoredProducer(producer, mFlinger, this);
-    mSurfaceFlingerConsumer = new SurfaceFlingerConsumer(consumer, mTextureName, this);
-    mSurfaceFlingerConsumer->setConsumerUsageBits(getEffectiveUsage(0));
-    mSurfaceFlingerConsumer->setContentsChangedListener(this);
-    mSurfaceFlingerConsumer->setName(mName);
-
-    if (mFlinger->isLayerTripleBufferingDisabled()) {
-        mProducer->setMaxDequeuedBufferCount(2);
-    }
-
-    const sp<const DisplayDevice> hw(mFlinger->getDefaultDisplayDevice());
-    updateTransformHint(hw);
-}
+void Layer::onFirstRef() {}
 
 Layer::~Layer() {
-  sp<Client> c(mClientRef.promote());
+    sp<Client> c(mClientRef.promote());
     if (c != 0) {
         c->detachLayer(this);
     }
@@ -199,103 +154,25 @@ Layer::~Layer() {
     for (auto& point : mLocalSyncPoints) {
         point->setFrameAvailable();
     }
-    mFlinger->deleteTextureAsync(mTextureName);
     mFrameTracker.logAndResetStats(mName);
-
-#ifdef USE_HWC2
-    if (!mHwcLayers.empty()) {
-        ALOGE("Found stale hardware composer layers when destroying "
-                "surface flinger layer %s", mName.string());
-        destroyAllHwcLayers();
-    }
-#endif
 }
 
 // ---------------------------------------------------------------------------
 // callbacks
 // ---------------------------------------------------------------------------
 
-#ifdef USE_HWC2
-void Layer::onLayerDisplayed(const sp<Fence>& releaseFence) {
-    mSurfaceFlingerConsumer->setReleaseFence(releaseFence);
-}
-#else
-void Layer::onLayerDisplayed(const sp<const DisplayDevice>& /* hw */,
-        HWComposer::HWCLayerInterface* layer) {
-    if (layer) {
-        layer->onDisplayed();
-        mSurfaceFlingerConsumer->setReleaseFence(layer->getAndResetReleaseFence());
-    }
-}
-#endif
-
-void Layer::onFrameAvailable(const BufferItem& item) {
-    // Add this buffer from our internal queue tracker
-    { // Autolock scope
-        Mutex::Autolock lock(mQueueItemLock);
-        mFlinger->mInterceptor.saveBufferUpdate(this, item.mGraphicBuffer->getWidth(),
-                item.mGraphicBuffer->getHeight(), item.mFrameNumber);
-        // Reset the frame number tracker when we receive the first buffer after
-        // a frame number reset
-        if (item.mFrameNumber == 1) {
-            mLastFrameNumberReceived = 0;
-        }
-
-        // Ensure that callbacks are handled in order
-        while (item.mFrameNumber != mLastFrameNumberReceived + 1) {
-            status_t result = mQueueItemCondition.waitRelative(mQueueItemLock,
-                    ms2ns(500));
-            if (result != NO_ERROR) {
-                ALOGE("[%s] Timed out waiting on callback", mName.string());
-            }
-        }
-
-        mQueueItems.push_back(item);
-        android_atomic_inc(&mQueuedFrames);
-
-        // Wake up any pending callbacks
-        mLastFrameNumberReceived = item.mFrameNumber;
-        mQueueItemCondition.broadcast();
-    }
-
-    mFlinger->signalLayerUpdate();
-}
-
-void Layer::onFrameReplaced(const BufferItem& item) {
-    { // Autolock scope
-        Mutex::Autolock lock(mQueueItemLock);
-
-        // Ensure that callbacks are handled in order
-        while (item.mFrameNumber != mLastFrameNumberReceived + 1) {
-            status_t result = mQueueItemCondition.waitRelative(mQueueItemLock,
-                    ms2ns(500));
-            if (result != NO_ERROR) {
-                ALOGE("[%s] Timed out waiting on callback", mName.string());
-            }
-        }
-
-        if (mQueueItems.empty()) {
-            ALOGE("Can't replace a frame on an empty queue");
-            return;
-        }
-        mQueueItems.editItemAt(mQueueItems.size() - 1) = item;
-
-        // Wake up any pending callbacks
-        mLastFrameNumberReceived = item.mFrameNumber;
-        mQueueItemCondition.broadcast();
-    }
-}
-
-void Layer::onSidebandStreamChanged() {
-    if (android_atomic_release_cas(false, true, &mSidebandStreamChanged) == 0) {
-        // mSidebandStreamChanged was false
-        mFlinger->signalLayerUpdate();
-    }
-}
+/*
+ * onLayerDisplayed is only meaningful for BufferLayer, but, is called through
+ * Layer.  So, the implementation is done in BufferLayer.  When called on a
+ * ColorLayer object, it's essentially a NOP.
+ */
+void Layer::onLayerDisplayed(const sp<Fence>& /*releaseFence*/) {}
 
 void Layer::onRemovedFromCurrentState() {
     // the layer is removed from SF mCurrentState to mLayersPendingRemoval
 
+    mPendingRemoval = true;
+
     if (mCurrentState.zOrderRelativeOf != nullptr) {
         sp<Layer> strongRelative = mCurrentState.zOrderRelativeOf.promote();
         if (strongRelative != nullptr) {
@@ -312,11 +189,9 @@ void Layer::onRemovedFromCurrentState() {
 
 void Layer::onRemoved() {
     // the layer is removed from SF mLayersPendingRemoval
+    abandon();
 
-    mSurfaceFlingerConsumer->abandon();
-#ifdef USE_HWC2
     destroyAllHwcLayers();
-#endif
 
     for (const auto& child : mCurrentChildren) {
         child->onRemoved();
@@ -331,94 +206,58 @@ const String8& Layer::getName() const {
     return mName;
 }
 
-status_t Layer::setBuffers( uint32_t w, uint32_t h,
-                            PixelFormat format, uint32_t flags)
-{
-    uint32_t const maxSurfaceDims = min(
-            mFlinger->getMaxTextureSize(), mFlinger->getMaxViewportDims());
-
-    // never allow a surface larger than what our underlying GL implementation
-    // can handle.
-    if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) {
-        ALOGE("dimensions too large %u x %u", uint32_t(w), uint32_t(h));
-        return BAD_VALUE;
-    }
-
-    mFormat = format;
-
-    mPotentialCursor = (flags & ISurfaceComposerClient::eCursorWindow) ? true : false;
-    mProtectedByApp = (flags & ISurfaceComposerClient::eProtectedByApp) ? true : false;
-    mCurrentOpacity = getOpacityForFormat(format);
-
-    mSurfaceFlingerConsumer->setDefaultBufferSize(w, h);
-    mSurfaceFlingerConsumer->setDefaultBufferFormat(format);
-    mSurfaceFlingerConsumer->setConsumerUsageBits(getEffectiveUsage(0));
-
-    return NO_ERROR;
+bool Layer::getPremultipledAlpha() const {
+    return mPremultipliedAlpha;
 }
 
 sp<IBinder> Layer::getHandle() {
     Mutex::Autolock _l(mLock);
-
-    LOG_ALWAYS_FATAL_IF(mHasSurface,
-            "Layer::getHandle() has already been called");
-
-    mHasSurface = true;
-
     return new Handle(mFlinger, this);
 }
 
-sp<IGraphicBufferProducer> Layer::getProducer() const {
-    return mProducer;
-}
-
 // ---------------------------------------------------------------------------
 // h/w composer set-up
 // ---------------------------------------------------------------------------
 
-#ifdef USE_HWC2
 bool Layer::createHwcLayer(HWComposer* hwc, int32_t hwcId) {
-    LOG_ALWAYS_FATAL_IF(mHwcLayers.count(hwcId) != 0,
-                "Already have a layer for hwcId %d", hwcId);
+    LOG_ALWAYS_FATAL_IF(getBE().mHwcLayers.count(hwcId) != 0,
+                        "Already have a layer for hwcId %d", hwcId);
     HWC2::Layer* layer = hwc->createLayer(hwcId);
     if (!layer) {
         return false;
     }
-    HWCInfo& hwcInfo = mHwcLayers[hwcId];
+    LayerBE::HWCInfo& hwcInfo = getBE().mHwcLayers[hwcId];
     hwcInfo.hwc = hwc;
     hwcInfo.layer = layer;
     layer->setLayerDestroyedListener(
-            [this, hwcId] (HWC2::Layer* /*layer*/){mHwcLayers.erase(hwcId);});
+            [this, hwcId](HWC2::Layer* /*layer*/) { getBE().mHwcLayers.erase(hwcId); });
     return true;
 }
 
 bool Layer::destroyHwcLayer(int32_t hwcId) {
-    if (mHwcLayers.count(hwcId) == 0) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         return false;
     }
-    auto& hwcInfo = mHwcLayers[hwcId];
-    LOG_ALWAYS_FATAL_IF(hwcInfo.layer == nullptr,
-            "Attempt to destroy null layer");
+    auto& hwcInfo = getBE().mHwcLayers[hwcId];
+    LOG_ALWAYS_FATAL_IF(hwcInfo.layer == nullptr, "Attempt to destroy null layer");
     LOG_ALWAYS_FATAL_IF(hwcInfo.hwc == nullptr, "Missing HWComposer");
     hwcInfo.hwc->destroyLayer(hwcId, hwcInfo.layer);
     // The layer destroyed listener should have cleared the entry from
     // mHwcLayers. Verify that.
-    LOG_ALWAYS_FATAL_IF(mHwcLayers.count(hwcId) != 0,
-            "Stale layer entry in mHwcLayers");
-
+    LOG_ALWAYS_FATAL_IF(getBE().mHwcLayers.count(hwcId) != 0,
+                        "Stale layer entry in getBE().mHwcLayers");
     return true;
 }
 
 void Layer::destroyAllHwcLayers() {
-    size_t numLayers = mHwcLayers.size();
+    size_t numLayers = getBE().mHwcLayers.size();
     for (size_t i = 0; i < numLayers; ++i) {
-        LOG_ALWAYS_FATAL_IF(mHwcLayers.empty(), "destroyAllHwcLayers failed");
-        destroyHwcLayer(mHwcLayers.begin()->first);
+        LOG_ALWAYS_FATAL_IF(getBE().mHwcLayers.empty(), "destroyAllHwcLayers failed");
+        destroyHwcLayer(getBE().mHwcLayers.begin()->first);
     }
-    LOG_ALWAYS_FATAL_IF(!mHwcLayers.empty(),
-            "All hardware composer layers should have been destroyed");
+    LOG_ALWAYS_FATAL_IF(!getBE().mHwcLayers.empty(),
+                        "All hardware composer layers should have been destroyed");
 }
-#endif
 
 Rect Layer::getContentCrop() const {
     // this is the crop rectangle that applies to the buffer
@@ -427,9 +266,9 @@ Rect Layer::getContentCrop() const {
     if (!mCurrentCrop.isEmpty()) {
         // if the buffer crop is defined, we use that
         crop = mCurrentCrop;
-    } else if (mActiveBuffer != NULL) {
+    } else if (getBE().compositionInfo.mBuffer != nullptr) {
         // otherwise we use the whole buffer
-        crop = mActiveBuffer->getBounds();
+        crop = getBE().compositionInfo.mBuffer->getBounds();
     } else {
         // if we don't have a buffer yet, we use an empty/invalid crop
         crop.makeInvalid();
@@ -550,10 +389,17 @@ Rect Layer::computeInitialCrop(const sp<const DisplayDevice>& hw) const {
         activeCrop.clear();
     }
     if (!s.finalCrop.isEmpty()) {
-        if(!activeCrop.intersect(s.finalCrop, &activeCrop)) {
+        if (!activeCrop.intersect(s.finalCrop, &activeCrop)) {
             activeCrop.clear();
         }
     }
+
+    const auto& p = mDrawingParent.promote();
+    if (p != nullptr) {
+        auto parentCrop = p->computeInitialCrop(hw);
+        activeCrop.intersect(parentCrop, &activeCrop);
+    }
+
     return activeCrop;
 }
 
@@ -567,11 +413,6 @@ FloatRect Layer::computeCrop(const sp<const DisplayDevice>& hw) const {
 
     // Screen space to make reduction to parent crop clearer.
     Rect activeCrop = computeInitialCrop(hw);
-    const auto& p = mDrawingParent.promote();
-    if (p != nullptr) {
-        auto parentCrop = p->computeInitialCrop(hw);
-        activeCrop.intersect(parentCrop, &activeCrop);
-    }
     Transform t = getTransform();
     // Back to layer space to work with the content crop.
     activeCrop = t.inverse().transform(activeCrop);
@@ -598,16 +439,13 @@ FloatRect Layer::computeCrop(const sp<const DisplayDevice>& hw) const {
          * the code below applies the primary display's inverse transform to the
          * buffer
          */
-        uint32_t invTransformOrient =
-                DisplayDevice::getPrimaryDisplayOrientationTransform();
+        uint32_t invTransformOrient = DisplayDevice::getPrimaryDisplayOrientationTransform();
         // calculate the inverse transform
         if (invTransformOrient & NATIVE_WINDOW_TRANSFORM_ROT_90) {
-            invTransformOrient ^= NATIVE_WINDOW_TRANSFORM_FLIP_V |
-                    NATIVE_WINDOW_TRANSFORM_FLIP_H;
+            invTransformOrient ^= NATIVE_WINDOW_TRANSFORM_FLIP_V | NATIVE_WINDOW_TRANSFORM_FLIP_H;
         }
         // and apply to the current transform
-        invTransform = (Transform(invTransformOrient) * Transform(invTransform))
-                .getOrientation();
+        invTransform = (Transform(invTransformOrient) * Transform(invTransform)).getOrientation();
     }
 
     int winWidth = s.active.w;
@@ -621,49 +459,36 @@ FloatRect Layer::computeCrop(const sp<const DisplayDevice>& hw) const {
         bool is_h_flipped = (invTransform & NATIVE_WINDOW_TRANSFORM_FLIP_H) != 0;
         bool is_v_flipped = (invTransform & NATIVE_WINDOW_TRANSFORM_FLIP_V) != 0;
         if (is_h_flipped == is_v_flipped) {
-            invTransform ^= NATIVE_WINDOW_TRANSFORM_FLIP_V |
-                    NATIVE_WINDOW_TRANSFORM_FLIP_H;
+            invTransform ^= NATIVE_WINDOW_TRANSFORM_FLIP_V | NATIVE_WINDOW_TRANSFORM_FLIP_H;
         }
         winWidth = s.active.h;
         winHeight = s.active.w;
     }
-    const Rect winCrop = activeCrop.transform(
-            invTransform, s.active.w, s.active.h);
+    const Rect winCrop = activeCrop.transform(invTransform, s.active.w, s.active.h);
 
     // below, crop is intersected with winCrop expressed in crop's coordinate space
-    float xScale = crop.getWidth()  / float(winWidth);
+    float xScale = crop.getWidth() / float(winWidth);
     float yScale = crop.getHeight() / float(winHeight);
 
-    float insetL = winCrop.left                 * xScale;
-    float insetT = winCrop.top                  * yScale;
-    float insetR = (winWidth - winCrop.right )  * xScale;
+    float insetL = winCrop.left * xScale;
+    float insetT = winCrop.top * yScale;
+    float insetR = (winWidth - winCrop.right) * xScale;
     float insetB = (winHeight - winCrop.bottom) * yScale;
 
-    crop.left   += insetL;
-    crop.top    += insetT;
-    crop.right  -= insetR;
+    crop.left += insetL;
+    crop.top += insetT;
+    crop.right -= insetR;
     crop.bottom -= insetB;
 
     return crop;
 }
 
-#ifdef USE_HWC2
 void Layer::setGeometry(const sp<const DisplayDevice>& displayDevice, uint32_t z)
-#else
-void Layer::setGeometry(
-    const sp<const DisplayDevice>& hw,
-        HWComposer::HWCLayerInterface& layer)
-#endif
 {
-#ifdef USE_HWC2
     const auto hwcId = displayDevice->getHwcDisplayId();
-    auto& hwcInfo = mHwcLayers[hwcId];
-#else
-    layer.setDefaultState();
-#endif
+    auto& hwcInfo = getBE().mHwcLayers[hwcId];
 
     // enable this layer
-#ifdef USE_HWC2
     hwcInfo.forceClientComposition = false;
 
     if (isSecure() && !displayDevice->isSecure()) {
@@ -671,33 +496,20 @@ void Layer::setGeometry(
     }
 
     auto& hwcLayer = hwcInfo.layer;
-#else
-    layer.setSkip(false);
-
-    if (isSecure() && !hw->isSecure()) {
-        layer.setSkip(true);
-    }
-#endif
 
     // this gives us only the "orientation" component of the transform
     const State& s(getDrawingState());
-#ifdef USE_HWC2
     auto blendMode = HWC2::BlendMode::None;
     if (!isOpaque(s) || getAlpha() != 1.0f) {
-        blendMode = mPremultipliedAlpha ?
-                HWC2::BlendMode::Premultiplied : HWC2::BlendMode::Coverage;
+        blendMode =
+                mPremultipliedAlpha ? HWC2::BlendMode::Premultiplied : HWC2::BlendMode::Coverage;
     }
     auto error = hwcLayer->setBlendMode(blendMode);
-    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set blend mode %s:"
-             " %s (%d)", mName.string(), to_string(blendMode).c_str(),
-             to_string(error).c_str(), static_cast<int32_t>(error));
-#else
-    if (!isOpaque(s) || getAlpha() != 0xFF) {
-        layer.setBlending(mPremultipliedAlpha ?
-                HWC_BLENDING_PREMULT :
-                HWC_BLENDING_COVERAGE);
-    }
-#endif
+    ALOGE_IF(error != HWC2::Error::None,
+             "[%s] Failed to set blend mode %s:"
+             " %s (%d)",
+             mName.string(), to_string(blendMode).c_str(), to_string(error).c_str(),
+             static_cast<int32_t>(error));
 
     // apply the layer's transform, followed by the display's global transform
     // here we're guaranteed that the layer's transform preserves rects
@@ -706,11 +518,7 @@ void Layer::setGeometry(
     if (!s.crop.isEmpty()) {
         Rect activeCrop(s.crop);
         activeCrop = t.transform(activeCrop);
-#ifdef USE_HWC2
-        if(!activeCrop.intersect(displayDevice->getViewport(), &activeCrop)) {
-#else
-        if(!activeCrop.intersect(hw->getViewport(), &activeCrop)) {
-#endif
+        if (!activeCrop.intersect(displayDevice->getViewport(), &activeCrop)) {
             activeCrop.clear();
         }
         activeCrop = t.inverse().transform(activeCrop, true);
@@ -720,28 +528,25 @@ void Layer::setGeometry(
         // transform.inverse().transform(transform.transform(Rect)) != Rect
         // in which case we need to make sure the final rect is clipped to the
         // display bounds.
-        if(!activeCrop.intersect(Rect(s.active.w, s.active.h), &activeCrop)) {
+        if (!activeCrop.intersect(Rect(s.active.w, s.active.h), &activeCrop)) {
             activeCrop.clear();
         }
         // mark regions outside the crop as transparent
         activeTransparentRegion.orSelf(Rect(0, 0, s.active.w, activeCrop.top));
-        activeTransparentRegion.orSelf(Rect(0, activeCrop.bottom,
-                s.active.w, s.active.h));
-        activeTransparentRegion.orSelf(Rect(0, activeCrop.top,
-                activeCrop.left, activeCrop.bottom));
-        activeTransparentRegion.orSelf(Rect(activeCrop.right, activeCrop.top,
-                s.active.w, activeCrop.bottom));
+        activeTransparentRegion.orSelf(Rect(0, activeCrop.bottom, s.active.w, s.active.h));
+        activeTransparentRegion.orSelf(Rect(0, activeCrop.top, activeCrop.left, activeCrop.bottom));
+        activeTransparentRegion.orSelf(
+                Rect(activeCrop.right, activeCrop.top, s.active.w, activeCrop.bottom));
     }
 
     // computeBounds returns a FloatRect to provide more accuracy during the
     // transformation. We then round upon constructing 'frame'.
     Rect frame{t.transform(computeBounds(activeTransparentRegion))};
     if (!s.finalCrop.isEmpty()) {
-        if(!frame.intersect(s.finalCrop, &frame)) {
+        if (!frame.intersect(s.finalCrop, &frame)) {
             frame.clear();
         }
     }
-#ifdef USE_HWC2
     if (!frame.intersect(displayDevice->getViewport(), &frame)) {
         frame.clear();
     }
@@ -749,10 +554,9 @@ void Layer::setGeometry(
     Rect transformedFrame = tr.transform(frame);
     error = hwcLayer->setDisplayFrame(transformedFrame);
     if (error != HWC2::Error::None) {
-        ALOGE("[%s] Failed to set display frame [%d, %d, %d, %d]: %s (%d)",
-                mName.string(), transformedFrame.left, transformedFrame.top,
-                transformedFrame.right, transformedFrame.bottom,
-                to_string(error).c_str(), static_cast<int32_t>(error));
+        ALOGE("[%s] Failed to set display frame [%d, %d, %d, %d]: %s (%d)", mName.string(),
+              transformedFrame.left, transformedFrame.top, transformedFrame.right,
+              transformedFrame.bottom, to_string(error).c_str(), static_cast<int32_t>(error));
     } else {
         hwcInfo.displayFrame = transformedFrame;
     }
@@ -761,45 +565,38 @@ void Layer::setGeometry(
     error = hwcLayer->setSourceCrop(sourceCrop);
     if (error != HWC2::Error::None) {
         ALOGE("[%s] Failed to set source crop [%.3f, %.3f, %.3f, %.3f]: "
-                "%s (%d)", mName.string(), sourceCrop.left, sourceCrop.top,
-                sourceCrop.right, sourceCrop.bottom, to_string(error).c_str(),
-                static_cast<int32_t>(error));
+              "%s (%d)",
+              mName.string(), sourceCrop.left, sourceCrop.top, sourceCrop.right, sourceCrop.bottom,
+              to_string(error).c_str(), static_cast<int32_t>(error));
     } else {
         hwcInfo.sourceCrop = sourceCrop;
     }
 
-    float alpha = getAlpha();
+    float alpha = static_cast<float>(getAlpha());
     error = hwcLayer->setPlaneAlpha(alpha);
-    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set plane alpha %.3f: "
-            "%s (%d)", mName.string(), alpha, to_string(error).c_str(),
-            static_cast<int32_t>(error));
+    ALOGE_IF(error != HWC2::Error::None,
+             "[%s] Failed to set plane alpha %.3f: "
+             "%s (%d)",
+             mName.string(), alpha, to_string(error).c_str(), static_cast<int32_t>(error));
 
     error = hwcLayer->setZOrder(z);
-    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set Z %u: %s (%d)",
-            mName.string(), z, to_string(error).c_str(),
-            static_cast<int32_t>(error));
+    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set Z %u: %s (%d)", mName.string(), z,
+             to_string(error).c_str(), static_cast<int32_t>(error));
 
     int type = s.type;
     int appId = s.appId;
     sp<Layer> parent = mDrawingParent.promote();
     if (parent.get()) {
         auto& parentState = parent->getDrawingState();
-        type = parentState.type;
-        appId = parentState.appId;
+        if (parentState.type >= 0 || parentState.appId >= 0) {
+            type = parentState.type;
+            appId = parentState.appId;
+        }
     }
 
     error = hwcLayer->setInfo(type, appId);
-    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set info (%d)",
-             mName.string(), static_cast<int32_t>(error));
-#else
-    if (!frame.intersect(hw->getViewport(), &frame)) {
-        frame.clear();
-    }
-    const Transform& tr(hw->getTransform());
-    layer.setFrame(tr.transform(frame));
-    layer.setCrop(computeCrop(hw));
-    layer.setPlaneAlpha(getAlpha());
-#endif
+    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set info (%d)", mName.string(),
+             static_cast<int32_t>(error));
 
     /*
      * Transformations are applied in this order:
@@ -817,12 +614,10 @@ void Layer::setGeometry(
          * the code below applies the primary display's inverse transform to the
          * buffer
          */
-        uint32_t invTransform =
-                DisplayDevice::getPrimaryDisplayOrientationTransform();
+        uint32_t invTransform = DisplayDevice::getPrimaryDisplayOrientationTransform();
         // calculate the inverse transform
         if (invTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) {
-            invTransform ^= NATIVE_WINDOW_TRANSFORM_FLIP_V |
-                    NATIVE_WINDOW_TRANSFORM_FLIP_H;
+            invTransform ^= NATIVE_WINDOW_TRANSFORM_FLIP_V | NATIVE_WINDOW_TRANSFORM_FLIP_H;
         }
 
         /*
@@ -836,163 +631,43 @@ void Layer::setGeometry(
 
     // this gives us only the "orientation" component of the transform
     const uint32_t orientation = transform.getOrientation();
-#ifdef USE_HWC2
     if (orientation & Transform::ROT_INVALID) {
         // we can only handle simple transformation
         hwcInfo.forceClientComposition = true;
     } else {
         auto transform = static_cast<HWC2::Transform>(orientation);
+        hwcInfo.transform = transform;
         auto error = hwcLayer->setTransform(transform);
-        ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set transform %s: "
-                "%s (%d)", mName.string(), to_string(transform).c_str(),
-                to_string(error).c_str(), static_cast<int32_t>(error));
+        ALOGE_IF(error != HWC2::Error::None,
+                 "[%s] Failed to set transform %s: "
+                 "%s (%d)",
+                 mName.string(), to_string(transform).c_str(), to_string(error).c_str(),
+                 static_cast<int32_t>(error));
     }
-#else
-    if (orientation & Transform::ROT_INVALID) {
-        // we can only handle simple transformation
-        layer.setSkip(true);
-    } else {
-        layer.setTransform(orientation);
-    }
-#endif
 }
 
-#ifdef USE_HWC2
 void Layer::forceClientComposition(int32_t hwcId) {
-    if (mHwcLayers.count(hwcId) == 0) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         ALOGE("forceClientComposition: no HWC layer found (%d)", hwcId);
         return;
     }
 
-    mHwcLayers[hwcId].forceClientComposition = true;
+    getBE().mHwcLayers[hwcId].forceClientComposition = true;
 }
 
-void Layer::setPerFrameData(const sp<const DisplayDevice>& displayDevice) {
-    // Apply this display's projection's viewport to the visible region
-    // before giving it to the HWC HAL.
-    const Transform& tr = displayDevice->getTransform();
-    const auto& viewport = displayDevice->getViewport();
-    Region visible = tr.transform(visibleRegion.intersect(viewport));
-    auto hwcId = displayDevice->getHwcDisplayId();
-    auto& hwcInfo = mHwcLayers[hwcId];
-    auto& hwcLayer = hwcInfo.layer;
-    auto error = hwcLayer->setVisibleRegion(visible);
-    if (error != HWC2::Error::None) {
-        ALOGE("[%s] Failed to set visible region: %s (%d)", mName.string(),
-                to_string(error).c_str(), static_cast<int32_t>(error));
-        visible.dump(LOG_TAG);
-    }
-
-    error = hwcLayer->setSurfaceDamage(surfaceDamageRegion);
-    if (error != HWC2::Error::None) {
-        ALOGE("[%s] Failed to set surface damage: %s (%d)", mName.string(),
-                to_string(error).c_str(), static_cast<int32_t>(error));
-        surfaceDamageRegion.dump(LOG_TAG);
-    }
-
-    // Sideband layers
-    if (mSidebandStream.get()) {
-        setCompositionType(hwcId, HWC2::Composition::Sideband);
-        ALOGV("[%s] Requesting Sideband composition", mName.string());
-        error = hwcLayer->setSidebandStream(mSidebandStream->handle());
-        if (error != HWC2::Error::None) {
-            ALOGE("[%s] Failed to set sideband stream %p: %s (%d)",
-                    mName.string(), mSidebandStream->handle(),
-                    to_string(error).c_str(), static_cast<int32_t>(error));
-        }
-        return;
-    }
-
-    // Client layers
-    if (hwcInfo.forceClientComposition ||
-            (mActiveBuffer != nullptr && mActiveBuffer->handle == nullptr)) {
-        ALOGV("[%s] Requesting Client composition", mName.string());
-        setCompositionType(hwcId, HWC2::Composition::Client);
-        return;
-    }
-
-    // SolidColor layers
-    if (mActiveBuffer == nullptr) {
-        setCompositionType(hwcId, HWC2::Composition::SolidColor);
-
-        // For now, we only support black for DimLayer
-        error = hwcLayer->setColor({0, 0, 0, 255});
-        if (error != HWC2::Error::None) {
-            ALOGE("[%s] Failed to set color: %s (%d)", mName.string(),
-                    to_string(error).c_str(), static_cast<int32_t>(error));
-        }
-
-        // Clear out the transform, because it doesn't make sense absent a
-        // source buffer
-        error = hwcLayer->setTransform(HWC2::Transform::None);
-        if (error != HWC2::Error::None) {
-            ALOGE("[%s] Failed to clear transform: %s (%d)", mName.string(),
-                    to_string(error).c_str(), static_cast<int32_t>(error));
-        }
-
-        return;
-    }
-
-    // Device or Cursor layers
-    if (mPotentialCursor) {
-        ALOGV("[%s] Requesting Cursor composition", mName.string());
-        setCompositionType(hwcId, HWC2::Composition::Cursor);
-    } else {
-        ALOGV("[%s] Requesting Device composition", mName.string());
-        setCompositionType(hwcId, HWC2::Composition::Device);
-    }
-
-    ALOGV("setPerFrameData: dataspace = %d", mCurrentState.dataSpace);
-    error = hwcLayer->setDataspace(mCurrentState.dataSpace);
-    if (error != HWC2::Error::None) {
-        ALOGE("[%s] Failed to set dataspace %d: %s (%d)", mName.string(),
-              mCurrentState.dataSpace, to_string(error).c_str(),
-              static_cast<int32_t>(error));
+bool Layer::getForceClientComposition(int32_t hwcId) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
+        ALOGE("getForceClientComposition: no HWC layer found (%d)", hwcId);
+        return false;
     }
 
-    uint32_t hwcSlot = 0;
-    sp<GraphicBuffer> hwcBuffer;
-    hwcInfo.bufferCache.getHwcBuffer(mActiveBufferSlot, mActiveBuffer,
-            &hwcSlot, &hwcBuffer);
-
-    auto acquireFence = mSurfaceFlingerConsumer->getCurrentFence();
-    error = hwcLayer->setBuffer(hwcSlot, hwcBuffer, acquireFence);
-    if (error != HWC2::Error::None) {
-        ALOGE("[%s] Failed to set buffer %p: %s (%d)", mName.string(),
-                mActiveBuffer->handle, to_string(error).c_str(),
-                static_cast<int32_t>(error));
-    }
-}
-
-#else
-void Layer::setPerFrameData(const sp<const DisplayDevice>& hw,
-        HWComposer::HWCLayerInterface& layer) {
-    // we have to set the visible region on every frame because
-    // we currently free it during onLayerDisplayed(), which is called
-    // after HWComposer::commit() -- every frame.
-    // Apply this display's projection's viewport to the visible region
-    // before giving it to the HWC HAL.
-    const Transform& tr = hw->getTransform();
-    Region visible = tr.transform(visibleRegion.intersect(hw->getViewport()));
-    layer.setVisibleRegionScreen(visible);
-    layer.setSurfaceDamage(surfaceDamageRegion);
-    mIsGlesComposition = (layer.getCompositionType() == HWC_FRAMEBUFFER);
-
-    if (mSidebandStream.get()) {
-        layer.setSidebandStream(mSidebandStream);
-    } else {
-        // NOTE: buffer can be NULL if the client never drew into this
-        // layer yet, or if we ran out of memory
-        layer.setBuffer(mActiveBuffer);
-    }
+    return getBE().mHwcLayers[hwcId].forceClientComposition;
 }
-#endif
 
-#ifdef USE_HWC2
 void Layer::updateCursorPosition(const sp<const DisplayDevice>& displayDevice) {
     auto hwcId = displayDevice->getHwcDisplayId();
-    if (mHwcLayers.count(hwcId) == 0 ||
-            getCompositionType(hwcId) != HWC2::Composition::Cursor) {
+    if (getBE().mHwcLayers.count(hwcId) == 0 ||
+        getCompositionType(hwcId) != HWC2::Composition::Cursor) {
         return;
     }
 
@@ -1015,285 +690,62 @@ void Layer::updateCursorPosition(const sp<const DisplayDevice>& displayDevice) {
     auto& displayTransform(displayDevice->getTransform());
     auto position = displayTransform.transform(frame);
 
-    auto error = mHwcLayers[hwcId].layer->setCursorPosition(position.left,
-            position.top);
-    ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set cursor position "
-            "to (%d, %d): %s (%d)", mName.string(), position.left,
-            position.top, to_string(error).c_str(),
-            static_cast<int32_t>(error));
-}
-#else
-void Layer::setAcquireFence(const sp<const DisplayDevice>& /* hw */,
-        HWComposer::HWCLayerInterface& layer) {
-    int fenceFd = -1;
-
-    // TODO: there is a possible optimization here: we only need to set the
-    // acquire fence the first time a new buffer is acquired on EACH display.
-
-    if (layer.getCompositionType() == HWC_OVERLAY || layer.getCompositionType() == HWC_CURSOR_OVERLAY) {
-        sp<Fence> fence = mSurfaceFlingerConsumer->getCurrentFence();
-        if (fence->isValid()) {
-            fenceFd = fence->dup();
-            if (fenceFd == -1) {
-                ALOGW("failed to dup layer fence, skipping sync: %d", errno);
-            }
-        }
-    }
-    layer.setAcquireFenceFd(fenceFd);
+    auto error = getBE().mHwcLayers[hwcId].layer->setCursorPosition(position.left,
+                                                                              position.top);
+    ALOGE_IF(error != HWC2::Error::None,
+             "[%s] Failed to set cursor position "
+             "to (%d, %d): %s (%d)",
+             mName.string(), position.left, position.top, to_string(error).c_str(),
+             static_cast<int32_t>(error));
 }
 
-Rect Layer::getPosition(
-    const sp<const DisplayDevice>& hw)
-{
-    // this gives us only the "orientation" component of the transform
-    const State& s(getCurrentState());
-
-    // apply the layer's transform, followed by the display's global transform
-    // here we're guaranteed that the layer's transform preserves rects
-    Rect win(s.active.w, s.active.h);
-    if (!s.crop.isEmpty()) {
-        win.intersect(s.crop, &win);
-    }
-    // subtract the transparent region and snap to the bounds
-    Rect bounds = reduce(win, s.activeTransparentRegion);
-    Rect frame(getTransform().transform(bounds));
-    frame.intersect(hw->getViewport(), &frame);
-    if (!s.finalCrop.isEmpty()) {
-        frame.intersect(s.finalCrop, &frame);
-    }
-    const Transform& tr(hw->getTransform());
-    return Rect(tr.transform(frame));
-}
-#endif
-
 // ---------------------------------------------------------------------------
 // drawing...
 // ---------------------------------------------------------------------------
 
-void Layer::draw(const sp<const DisplayDevice>& hw, const Region& clip) const {
-    onDraw(hw, clip, false);
+void Layer::draw(const RenderArea& renderArea, const Region& clip) const {
+    onDraw(renderArea, clip, false);
 }
 
-void Layer::draw(const sp<const DisplayDevice>& hw,
-        bool useIdentityTransform) const {
-    onDraw(hw, Region(hw->bounds()), useIdentityTransform);
+void Layer::draw(const RenderArea& renderArea, bool useIdentityTransform) const {
+    onDraw(renderArea, Region(renderArea.getBounds()), useIdentityTransform);
 }
 
-void Layer::draw(const sp<const DisplayDevice>& hw) const {
-    onDraw(hw, Region(hw->bounds()), false);
-}
-
-static constexpr mat4 inverseOrientation(uint32_t transform) {
-    const mat4 flipH(-1,0,0,0,  0,1,0,0, 0,0,1,0, 1,0,0,1);
-    const mat4 flipV( 1,0,0,0, 0,-1,0,0, 0,0,1,0, 0,1,0,1);
-    const mat4 rot90( 0,1,0,0, -1,0,0,0, 0,0,1,0, 1,0,0,1);
-    mat4 tr;
-
-    if (transform & NATIVE_WINDOW_TRANSFORM_ROT_90) {
-        tr = tr * rot90;
-    }
-    if (transform & NATIVE_WINDOW_TRANSFORM_FLIP_H) {
-        tr = tr * flipH;
-    }
-    if (transform & NATIVE_WINDOW_TRANSFORM_FLIP_V) {
-        tr = tr * flipV;
-    }
-    return inverse(tr);
-}
-
-/*
- * onDraw will draw the current layer onto the presentable buffer
- */
-void Layer::onDraw(const sp<const DisplayDevice>& hw, const Region& clip,
-        bool useIdentityTransform) const
-{
-    ATRACE_CALL();
-
-    if (CC_UNLIKELY(mActiveBuffer == 0)) {
-        // the texture has not been created yet, this Layer has
-        // in fact never been drawn into. This happens frequently with
-        // SurfaceView because the WindowManager can't know when the client
-        // has drawn the first time.
-
-        // If there is nothing under us, we paint the screen in black, otherwise
-        // we just skip this update.
-
-        // figure out if there is something below us
-        Region under;
-        bool finished = false;
-        mFlinger->mDrawingState.traverseInZOrder([&](Layer* layer) {
-            if (finished || layer == static_cast<Layer const*>(this)) {
-                finished = true;
-                return;
-            }
-            under.orSelf( hw->getTransform().transform(layer->visibleRegion) );
-        });
-        // if not everything below us is covered, we plug the holes!
-        Region holes(clip.subtract(under));
-        if (!holes.isEmpty()) {
-            clearWithOpenGL(hw, 0, 0, 0, 1);
-        }
-        return;
-    }
-
-    // Bind the current buffer to the GL texture, and wait for it to be
-    // ready for us to draw into.
-    status_t err = mSurfaceFlingerConsumer->bindTextureImage();
-    if (err != NO_ERROR) {
-        ALOGW("onDraw: bindTextureImage failed (err=%d)", err);
-        // Go ahead and draw the buffer anyway; no matter what we do the screen
-        // is probably going to have something visibly wrong.
-    }
-
-    bool blackOutLayer = isProtected() || (isSecure() && !hw->isSecure());
-
-    RenderEngine& engine(mFlinger->getRenderEngine());
-
-    if (!blackOutLayer) {
-        // TODO: we could be more subtle with isFixedSize()
-        const bool useFiltering = getFiltering() || needsFiltering(hw) || isFixedSize();
-
-        // Query the texture matrix given our current filtering mode.
-        float textureMatrix[16];
-        mSurfaceFlingerConsumer->setFilteringEnabled(useFiltering);
-        mSurfaceFlingerConsumer->getTransformMatrix(textureMatrix);
-
-        if (getTransformToDisplayInverse()) {
-
-            /*
-             * the code below applies the primary display's inverse transform to
-             * the texture transform
-             */
-            uint32_t transform =
-                    DisplayDevice::getPrimaryDisplayOrientationTransform();
-            mat4 tr = inverseOrientation(transform);
-
-            /**
-             * TODO(b/36727915): This is basically a hack.
-             *
-             * Ensure that regardless of the parent transformation,
-             * this buffer is always transformed from native display
-             * orientation to display orientation. For example, in the case
-             * of a camera where the buffer remains in native orientation,
-             * we want the pixels to always be upright.
-             */
-            sp<Layer> p = mDrawingParent.promote();
-            if (p != nullptr) {
-                const auto parentTransform = p->getTransform();
-                tr = tr * inverseOrientation(parentTransform.getOrientation());
-            }
-
-            // and finally apply it to the original texture matrix
-            const mat4 texTransform(mat4(static_cast<const float*>(textureMatrix)) * tr);
-            memcpy(textureMatrix, texTransform.asArray(), sizeof(textureMatrix));
-        }
-
-        // Set things up for texturing.
-        mTexture.setDimensions(mActiveBuffer->getWidth(), mActiveBuffer->getHeight());
-        mTexture.setFiltering(useFiltering);
-        mTexture.setMatrix(textureMatrix);
-
-        engine.setupLayerTexturing(mTexture);
-    } else {
-        engine.setupLayerBlackedOut();
-    }
-    drawWithOpenGL(hw, useIdentityTransform);
-    engine.disableTexturing();
+void Layer::draw(const RenderArea& renderArea) const {
+    onDraw(renderArea, Region(renderArea.getBounds()), false);
 }
 
-
-void Layer::clearWithOpenGL(const sp<const DisplayDevice>& hw,
-        float red, float green, float blue,
-        float alpha) const
-{
-    RenderEngine& engine(mFlinger->getRenderEngine());
-    computeGeometry(hw, mMesh, false);
+void Layer::clearWithOpenGL(const RenderArea& renderArea, float red, float green, float blue,
+                            float alpha) const {
+    auto& engine(mFlinger->getRenderEngine());
+    computeGeometry(renderArea, getBE().mMesh, false);
     engine.setupFillWithColor(red, green, blue, alpha);
-    engine.drawMesh(mMesh);
+    engine.drawMesh(getBE().mMesh);
 }
 
-void Layer::clearWithOpenGL(
-        const sp<const DisplayDevice>& hw) const {
-    clearWithOpenGL(hw, 0,0,0,0);
+void Layer::clearWithOpenGL(const RenderArea& renderArea) const {
+    clearWithOpenGL(renderArea, 0, 0, 0, 0);
 }
 
-void Layer::drawWithOpenGL(const sp<const DisplayDevice>& hw,
-        bool useIdentityTransform) const {
-    const State& s(getDrawingState());
-
-    computeGeometry(hw, mMesh, useIdentityTransform);
-
-    /*
-     * NOTE: the way we compute the texture coordinates here produces
-     * different results than when we take the HWC path -- in the later case
-     * the "source crop" is rounded to texel boundaries.
-     * This can produce significantly different results when the texture
-     * is scaled by a large amount.
-     *
-     * The GL code below is more logical (imho), and the difference with
-     * HWC is due to a limitation of the HWC API to integers -- a question
-     * is suspend is whether we should ignore this problem or revert to
-     * GL composition when a buffer scaling is applied (maybe with some
-     * minimal value)? Or, we could make GL behave like HWC -- but this feel
-     * like more of a hack.
-     */
-    const Rect bounds{computeBounds()}; // Rounds from FloatRect
-
-    Transform t = getTransform();
-    Rect win = bounds;
-    if (!s.finalCrop.isEmpty()) {
-        win = t.transform(win);
-        if (!win.intersect(s.finalCrop, &win)) {
-            win.clear();
-        }
-        win = t.inverse().transform(win);
-        if (!win.intersect(bounds, &win)) {
-            win.clear();
-        }
-    }
-
-    float left   = float(win.left)   / float(s.active.w);
-    float top    = float(win.top)    / float(s.active.h);
-    float right  = float(win.right)  / float(s.active.w);
-    float bottom = float(win.bottom) / float(s.active.h);
-
-    // TODO: we probably want to generate the texture coords with the mesh
-    // here we assume that we only have 4 vertices
-    Mesh::VertexArray<vec2> texCoords(mMesh.getTexCoordArray<vec2>());
-    texCoords[0] = vec2(left, 1.0f - top);
-    texCoords[1] = vec2(left, 1.0f - bottom);
-    texCoords[2] = vec2(right, 1.0f - bottom);
-    texCoords[3] = vec2(right, 1.0f - top);
-
-    RenderEngine& engine(mFlinger->getRenderEngine());
-    engine.setupLayerBlending(mPremultipliedAlpha, isOpaque(s), getAlpha());
-#ifdef USE_HWC2
-    engine.setSourceDataSpace(mCurrentState.dataSpace);
-#endif
-    engine.drawMesh(mMesh);
-    engine.disableBlending();
-}
-
-#ifdef USE_HWC2
-void Layer::setCompositionType(int32_t hwcId, HWC2::Composition type,
-        bool callIntoHwc) {
-    if (mHwcLayers.count(hwcId) == 0) {
+void Layer::setCompositionType(int32_t hwcId, HWC2::Composition type, bool callIntoHwc) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         ALOGE("setCompositionType called without a valid HWC layer");
         return;
     }
-    auto& hwcInfo = mHwcLayers[hwcId];
+    auto& hwcInfo = getBE().mHwcLayers[hwcId];
     auto& hwcLayer = hwcInfo.layer;
-    ALOGV("setCompositionType(%" PRIx64 ", %s, %d)", hwcLayer->getId(),
-            to_string(type).c_str(), static_cast<int>(callIntoHwc));
+    ALOGV("setCompositionType(%" PRIx64 ", %s, %d)", hwcLayer->getId(), to_string(type).c_str(),
+          static_cast<int>(callIntoHwc));
     if (hwcInfo.compositionType != type) {
         ALOGV("    actually setting");
         hwcInfo.compositionType = type;
         if (callIntoHwc) {
             auto error = hwcLayer->setCompositionType(type);
-            ALOGE_IF(error != HWC2::Error::None, "[%s] Failed to set "
-                    "composition type %s: %s (%d)", mName.string(),
-                    to_string(type).c_str(), to_string(error).c_str(),
-                    static_cast<int32_t>(error));
+            ALOGE_IF(error != HWC2::Error::None,
+                     "[%s] Failed to set "
+                     "composition type %s: %s (%d)",
+                     mName.string(), to_string(type).c_str(), to_string(error).c_str(),
+                     static_cast<int32_t>(error));
         }
     }
 }
@@ -1304,86 +756,27 @@ HWC2::Composition Layer::getCompositionType(int32_t hwcId) const {
         // have a HWC counterpart, then it will always be Client
         return HWC2::Composition::Client;
     }
-    if (mHwcLayers.count(hwcId) == 0) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         ALOGE("getCompositionType called with an invalid HWC layer");
         return HWC2::Composition::Invalid;
     }
-    return mHwcLayers.at(hwcId).compositionType;
+    return getBE().mHwcLayers.at(hwcId).compositionType;
 }
 
 void Layer::setClearClientTarget(int32_t hwcId, bool clear) {
-    if (mHwcLayers.count(hwcId) == 0) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         ALOGE("setClearClientTarget called without a valid HWC layer");
         return;
     }
-    mHwcLayers[hwcId].clearClientTarget = clear;
+    getBE().mHwcLayers[hwcId].clearClientTarget = clear;
 }
 
 bool Layer::getClearClientTarget(int32_t hwcId) const {
-    if (mHwcLayers.count(hwcId) == 0) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         ALOGE("getClearClientTarget called without a valid HWC layer");
         return false;
     }
-    return mHwcLayers.at(hwcId).clearClientTarget;
-}
-#endif
-
-uint32_t Layer::getProducerStickyTransform() const {
-    int producerStickyTransform = 0;
-    int ret = mProducer->query(NATIVE_WINDOW_STICKY_TRANSFORM, &producerStickyTransform);
-    if (ret != OK) {
-        ALOGW("%s: Error %s (%d) while querying window sticky transform.", __FUNCTION__,
-                strerror(-ret), ret);
-        return 0;
-    }
-    return static_cast<uint32_t>(producerStickyTransform);
-}
-
-bool Layer::latchUnsignaledBuffers() {
-    static bool propertyLoaded = false;
-    static bool latch = false;
-    static std::mutex mutex;
-    std::lock_guard<std::mutex> lock(mutex);
-    if (!propertyLoaded) {
-        char value[PROPERTY_VALUE_MAX] = {};
-        property_get("debug.sf.latch_unsignaled", value, "0");
-        latch = atoi(value);
-        propertyLoaded = true;
-    }
-    return latch;
-}
-
-uint64_t Layer::getHeadFrameNumber() const {
-    Mutex::Autolock lock(mQueueItemLock);
-    if (!mQueueItems.empty()) {
-        return mQueueItems[0].mFrameNumber;
-    } else {
-        return mCurrentFrameNumber;
-    }
-}
-
-bool Layer::headFenceHasSignaled() const {
-#ifdef USE_HWC2
-    if (latchUnsignaledBuffers()) {
-        return true;
-    }
-
-    Mutex::Autolock lock(mQueueItemLock);
-    if (mQueueItems.empty()) {
-        return true;
-    }
-    if (mQueueItems[0].mIsDroppable) {
-        // Even though this buffer's fence may not have signaled yet, it could
-        // be replaced by another buffer before it has a chance to, which means
-        // that it's possible to get into a situation where a buffer is never
-        // able to be latched. To avoid this, grab this buffer anyway.
-        return true;
-    }
-    return mQueueItems[0].mFenceTime->getSignalTime() !=
-            Fence::SIGNAL_TIME_PENDING;
-#else
-    return true;
-#endif
+    return getBE().mHwcLayers.at(hwcId).clearClientTarget;
 }
 
 bool Layer::addSyncPoint(const std::shared_ptr<SyncPoint>& point) {
@@ -1406,28 +799,6 @@ bool Layer::getFiltering() const {
     return mFiltering;
 }
 
-// As documented in libhardware header, formats in the range
-// 0x100 - 0x1FF are specific to the HAL implementation, and
-// are known to have no alpha channel
-// TODO: move definition for device-specific range into
-// hardware.h, instead of using hard-coded values here.
-#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF)
-
-bool Layer::getOpacityForFormat(uint32_t format) {
-    if (HARDWARE_IS_DEVICE_FORMAT(format)) {
-        return true;
-    }
-    switch (format) {
-        case HAL_PIXEL_FORMAT_RGBA_8888:
-        case HAL_PIXEL_FORMAT_BGRA_8888:
-        case HAL_PIXEL_FORMAT_RGBA_FP16:
-        case HAL_PIXEL_FORMAT_RGBA_1010102:
-            return false;
-    }
-    // in all other case, we have no blending (also for unknown formats)
-    return true;
-}
-
 // ----------------------------------------------------------------------------
 // local state
 // ----------------------------------------------------------------------------
@@ -1447,12 +818,11 @@ static void boundPoint(vec2* point, const Rect& crop) {
     }
 }
 
-void Layer::computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh,
-        bool useIdentityTransform) const
-{
+void Layer::computeGeometry(const RenderArea& renderArea, Mesh& mesh,
+                            bool useIdentityTransform) const {
     const Layer::State& s(getDrawingState());
-    const Transform hwTransform(hw->getTransform());
-    const uint32_t hw_h = hw->getHeight();
+    const Transform renderAreaTransform(renderArea.getTransform());
+    const uint32_t height = renderArea.getHeight();
     FloatRect win = computeBounds();
 
     vec2 lt = vec2(win.left, win.top);
@@ -1476,53 +846,20 @@ void Layer::computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh,
     }
 
     Mesh::VertexArray<vec2> position(mesh.getPositionArray<vec2>());
-    position[0] = hwTransform.transform(lt);
-    position[1] = hwTransform.transform(lb);
-    position[2] = hwTransform.transform(rb);
-    position[3] = hwTransform.transform(rt);
-    for (size_t i=0 ; i<4 ; i++) {
-        position[i].y = hw_h - position[i].y;
+    position[0] = renderAreaTransform.transform(lt);
+    position[1] = renderAreaTransform.transform(lb);
+    position[2] = renderAreaTransform.transform(rb);
+    position[3] = renderAreaTransform.transform(rt);
+    for (size_t i = 0; i < 4; i++) {
+        position[i].y = height - position[i].y;
     }
 }
 
-bool Layer::isOpaque(const Layer::State& s) const
-{
-    // if we don't have a buffer or sidebandStream yet, we're translucent regardless of the
-    // layer's opaque flag.
-    if ((mSidebandStream == nullptr) && (mActiveBuffer == nullptr)) {
-        return false;
-    }
-
-    // if the layer has the opaque flag, then we're always opaque,
-    // otherwise we use the current buffer's format.
-    return ((s.flags & layer_state_t::eLayerOpaque) != 0) || mCurrentOpacity;
-}
-
-bool Layer::isSecure() const
-{
+bool Layer::isSecure() const {
     const Layer::State& s(mDrawingState);
     return (s.flags & layer_state_t::eLayerSecure);
 }
 
-bool Layer::isProtected() const
-{
-    const sp<GraphicBuffer>& activeBuffer(mActiveBuffer);
-    return (activeBuffer != 0) &&
-            (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED);
-}
-
-bool Layer::isFixedSize() const {
-    return getEffectiveScalingMode() != NATIVE_WINDOW_SCALING_MODE_FREEZE;
-}
-
-bool Layer::isCropped() const {
-    return !mCurrentCrop.isEmpty();
-}
-
-bool Layer::needsFiltering(const sp<const DisplayDevice>& hw) const {
-    return mNeedsFiltering || hw->needsFiltering();
-}
-
 void Layer::setVisibleRegion(const Region& visibleRegion) {
     // always called from main thread
     this->visibleRegion = visibleRegion;
@@ -1533,12 +870,17 @@ void Layer::setCoveredRegion(const Region& coveredRegion) {
     this->coveredRegion = coveredRegion;
 }
 
-void Layer::setVisibleNonTransparentRegion(const Region&
-        setVisibleNonTransparentRegion) {
+void Layer::setVisibleNonTransparentRegion(const Region& setVisibleNonTransparentRegion) {
     // always called from main thread
     this->visibleNonTransparentRegion = setVisibleNonTransparentRegion;
 }
 
+void Layer::clearVisibilityRegions() {
+    visibleRegion.clear();
+    visibleNonTransparentRegion.clear();
+    coveredRegion.clear();
+}
+
 // ----------------------------------------------------------------------------
 // transaction
 // ----------------------------------------------------------------------------
@@ -1559,8 +901,7 @@ void Layer::pushPendingState() {
             // to be applied as per normal (no synchronization).
             mCurrentState.barrierLayer = nullptr;
         } else {
-            auto syncPoint = std::make_shared<SyncPoint>(
-                    mCurrentState.frameNumber);
+            auto syncPoint = std::make_shared<SyncPoint>(mCurrentState.frameNumber);
             if (barrierLayer->addSyncPoint(syncPoint)) {
                 mRemoteSyncPoints.push_back(std::move(syncPoint));
             } else {
@@ -1579,10 +920,7 @@ void Layer::pushPendingState() {
 }
 
 void Layer::popPendingState(State* stateToCommit) {
-    auto oldFlags = stateToCommit->flags;
     *stateToCommit = mPendingStates[0];
-    stateToCommit->flags = (oldFlags & ~stateToCommit->mask) |
-            (stateToCommit->flags & stateToCommit->mask);
 
     mPendingStates.removeAt(0);
     ATRACE_INT(mTransactionName.string(), mPendingStates.size());
@@ -1602,10 +940,8 @@ bool Layer::applyPendingStates(State* stateToCommit) {
                 continue;
             }
 
-            if (mRemoteSyncPoints.front()->getFrameNumber() !=
-                    mPendingStates[0].frameNumber) {
-                ALOGE("[%s] Unexpected sync point frame number found",
-                        mName.string());
+            if (mRemoteSyncPoints.front()->getFrameNumber() != mPendingStates[0].frameNumber) {
+                ALOGE("[%s] Unexpected sync point frame number found", mName.string());
 
                 // Signal our end of the sync point and then dispose of it
                 mRemoteSyncPoints.front()->setTransactionApplied();
@@ -1641,17 +977,6 @@ bool Layer::applyPendingStates(State* stateToCommit) {
     return stateUpdateAvailable;
 }
 
-void Layer::notifyAvailableFrames() {
-    auto headFrameNumber = getHeadFrameNumber();
-    bool headFenceSignaled = headFenceHasSignaled();
-    Mutex::Autolock lock(mLocalSyncPointMutex);
-    for (auto& point : mLocalSyncPoints) {
-        if (headFrameNumber >= point->getFrameNumber() && headFenceSignaled) {
-            point->setFrameAvailable();
-        }
-    }
-}
-
 uint32_t Layer::doTransaction(uint32_t flags) {
     ATRACE_CALL();
 
@@ -1663,59 +988,50 @@ uint32_t Layer::doTransaction(uint32_t flags) {
 
     const Layer::State& s(getDrawingState());
 
-    const bool sizeChanged = (c.requested.w != s.requested.w) ||
-                             (c.requested.h != s.requested.h);
+    const bool sizeChanged = (c.requested.w != s.requested.w) || (c.requested.h != s.requested.h);
 
     if (sizeChanged) {
         // the size changed, we need to ask our client to request a new buffer
         ALOGD_IF(DEBUG_RESIZE,
-                "doTransaction: geometry (layer=%p '%s'), tr=%02x, scalingMode=%d\n"
-                "  current={ active   ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n"
-                "            requested={ wh={%4u,%4u} }}\n"
-                "  drawing={ active   ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n"
-                "            requested={ wh={%4u,%4u} }}\n",
-                this, getName().string(), mCurrentTransform,
-                getEffectiveScalingMode(),
-                c.active.w, c.active.h,
-                c.crop.left,
-                c.crop.top,
-                c.crop.right,
-                c.crop.bottom,
-                c.crop.getWidth(),
-                c.crop.getHeight(),
-                c.requested.w, c.requested.h,
-                s.active.w, s.active.h,
-                s.crop.left,
-                s.crop.top,
-                s.crop.right,
-                s.crop.bottom,
-                s.crop.getWidth(),
-                s.crop.getHeight(),
-                s.requested.w, s.requested.h);
+                 "doTransaction: geometry (layer=%p '%s'), tr=%02x, scalingMode=%d\n"
+                 "  current={ active   ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n"
+                 "            requested={ wh={%4u,%4u} }}\n"
+                 "  drawing={ active   ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n"
+                 "            requested={ wh={%4u,%4u} }}\n",
+                 this, getName().string(), mCurrentTransform,
+                 getEffectiveScalingMode(), c.active.w, c.active.h, c.crop.left, c.crop.top,
+                 c.crop.right, c.crop.bottom, c.crop.getWidth(), c.crop.getHeight(), c.requested.w,
+                 c.requested.h, s.active.w, s.active.h, s.crop.left, s.crop.top, s.crop.right,
+                 s.crop.bottom, s.crop.getWidth(), s.crop.getHeight(), s.requested.w,
+                 s.requested.h);
 
         // record the new size, form this point on, when the client request
         // a buffer, it'll get the new size.
-        mSurfaceFlingerConsumer->setDefaultBufferSize(
-                c.requested.w, c.requested.h);
-    }
-
-    const bool resizePending = (c.requested.w != c.active.w) ||
-            (c.requested.h != c.active.h);
+        setDefaultBufferSize(c.requested.w, c.requested.h);
+    }
+
+    // Don't let Layer::doTransaction update the drawing state
+    // if we have a pending resize, unless we are in fixed-size mode.
+    // the drawing state will be updated only once we receive a buffer
+    // with the correct size.
+    //
+    // In particular, we want to make sure the clip (which is part
+    // of the geometry state) is latched together with the size but is
+    // latched immediately when no resizing is involved.
+    //
+    // If a sideband stream is attached, however, we want to skip this
+    // optimization so that transactions aren't missed when a buffer
+    // never arrives
+    //
+    // In the case that we don't have a buffer we ignore other factors
+    // and avoid entering the resizePending state. At a high level the
+    // resizePending state is to avoid applying the state of the new buffer
+    // to the old buffer. However in the state where we don't have an old buffer
+    // there is no such concern but we may still be being used as a parent layer.
+    const bool resizePending = ((c.requested.w != c.active.w) || (c.requested.h != c.active.h)) &&
+            (getBE().compositionInfo.mBuffer != nullptr);
     if (!isFixedSize()) {
-        if (resizePending && mSidebandStream == NULL) {
-            // don't let Layer::doTransaction update the drawing state
-            // if we have a pending resize, unless we are in fixed-size mode.
-            // the drawing state will be updated only once we receive a buffer
-            // with the correct size.
-            //
-            // in particular, we want to make sure the clip (which is part
-            // of the geometry state) is latched together with the size but is
-            // latched immediately when no resizing is involved.
-            //
-            // If a sideband stream is attached, however, we want to skip this
-            // optimization so that transactions aren't missed when a buffer
-            // never arrives
-
+        if (resizePending && getBE().compositionInfo.hwc.sidebandStream == nullptr) {
             flags |= eDontUpdateGeometryState;
         }
     }
@@ -1762,8 +1078,7 @@ uint32_t Layer::doTransaction(uint32_t flags) {
 
         // we may use linear filtering, if the matrix scales us
         const uint8_t type = c.active.transform.getType();
-        mNeedsFiltering = (!c.active.transform.preserveRects() ||
-                (type >= Transform::SCALE));
+        mNeedsFiltering = (!c.active.transform.preserveRects() || (type >= Transform::SCALE));
     }
 
     // If the layer is hidden, signal and clear out all local sync points so
@@ -1821,13 +1136,27 @@ bool Layer::setChildLayer(const sp<Layer>& childLayer, int32_t z) {
     if (childLayer->setLayer(z)) {
         mCurrentChildren.removeAt(idx);
         mCurrentChildren.add(childLayer);
+        return true;
     }
-    return true;
+    return false;
 }
 
-bool Layer::setLayer(int32_t z) {
-    if (mCurrentState.z == z)
+bool Layer::setChildRelativeLayer(const sp<Layer>& childLayer,
+        const sp<IBinder>& relativeToHandle, int32_t relativeZ) {
+    ssize_t idx = mCurrentChildren.indexOf(childLayer);
+    if (idx < 0) {
         return false;
+    }
+    if (childLayer->setRelativeLayer(relativeToHandle, relativeZ)) {
+        mCurrentChildren.removeAt(idx);
+        mCurrentChildren.add(childLayer);
+        return true;
+    }
+    return false;
+}
+
+bool Layer::setLayer(int32_t z) {
+    if (mCurrentState.z == z && !usingRelativeZ(LayerVector::StateSet::Current)) return false;
     mCurrentState.sequence++;
     mCurrentState.z = z;
     mCurrentState.modified = true;
@@ -1858,7 +1187,7 @@ void Layer::addZOrderRelative(const wp<Layer>& relative) {
     setTransactionFlags(eTransactionNeeded);
 }
 
-bool Layer::setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t z) {
+bool Layer::setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t relativeZ) {
     sp<Handle> handle = static_cast<Handle*>(relativeToHandle.get());
     if (handle == nullptr) {
         return false;
@@ -1868,10 +1197,19 @@ bool Layer::setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t z) {
         return false;
     }
 
+    if (mCurrentState.z == relativeZ && usingRelativeZ(LayerVector::StateSet::Current) &&
+            mCurrentState.zOrderRelativeOf == relative) {
+        return false;
+    }
+
     mCurrentState.sequence++;
     mCurrentState.modified = true;
-    mCurrentState.z = z;
+    mCurrentState.z = relativeZ;
 
+    auto oldZOrderRelativeOf = mCurrentState.zOrderRelativeOf.promote();
+    if (oldZOrderRelativeOf != nullptr) {
+        oldZOrderRelativeOf->removeZOrderRelative(this);
+    }
     mCurrentState.zOrderRelativeOf = relative;
     relative->addZOrderRelative(this);
 
@@ -1881,31 +1219,39 @@ bool Layer::setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t z) {
 }
 
 bool Layer::setSize(uint32_t w, uint32_t h) {
-    if (mCurrentState.requested.w == w && mCurrentState.requested.h == h)
-        return false;
+    if (mCurrentState.requested.w == w && mCurrentState.requested.h == h) return false;
     mCurrentState.requested.w = w;
     mCurrentState.requested.h = h;
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
     return true;
 }
-#ifdef USE_HWC2
 bool Layer::setAlpha(float alpha) {
-#else
-bool Layer::setAlpha(uint8_t alpha) {
-#endif
-    if (mCurrentState.alpha == alpha)
+    if (mCurrentState.color.a == alpha) return false;
+    mCurrentState.sequence++;
+    mCurrentState.color.a = alpha;
+    mCurrentState.modified = true;
+    setTransactionFlags(eTransactionNeeded);
+    return true;
+}
+
+bool Layer::setColor(const half3& color) {
+    if (color.r == mCurrentState.color.r && color.g == mCurrentState.color.g &&
+        color.b == mCurrentState.color.b)
         return false;
+
     mCurrentState.sequence++;
-    mCurrentState.alpha = alpha;
+    mCurrentState.color.r = color.r;
+    mCurrentState.color.g = color.g;
+    mCurrentState.color.b = color.b;
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
     return true;
 }
+
 bool Layer::setMatrix(const layer_state_t::matrix22_t& matrix) {
     mCurrentState.sequence++;
-    mCurrentState.requested.transform.set(
-            matrix.dsdx, matrix.dtdy, matrix.dtdx, matrix.dsdy);
+    mCurrentState.requested.transform.set(matrix.dsdx, matrix.dtdy, matrix.dtdx, matrix.dsdy);
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
     return true;
@@ -1918,19 +1264,16 @@ bool Layer::setTransparentRegionHint(const Region& transparent) {
 }
 bool Layer::setFlags(uint8_t flags, uint8_t mask) {
     const uint32_t newFlags = (mCurrentState.flags & ~mask) | (flags & mask);
-    if (mCurrentState.flags == newFlags)
-        return false;
+    if (mCurrentState.flags == newFlags) return false;
     mCurrentState.sequence++;
     mCurrentState.flags = newFlags;
-    mCurrentState.mask = mask;
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
     return true;
 }
 
 bool Layer::setCrop(const Rect& crop, bool immediate) {
-    if (mCurrentState.requestedCrop == crop)
-        return false;
+    if (mCurrentState.requestedCrop == crop) return false;
     mCurrentState.sequence++;
     mCurrentState.requestedCrop = crop;
     if (immediate && !mFreezeGeometryUpdates) {
@@ -1944,8 +1287,7 @@ bool Layer::setCrop(const Rect& crop, bool immediate) {
 }
 
 bool Layer::setFinalCrop(const Rect& crop, bool immediate) {
-    if (mCurrentState.requestedFinalCrop == crop)
-        return false;
+    if (mCurrentState.requestedFinalCrop == crop) return false;
     mCurrentState.sequence++;
     mCurrentState.requestedFinalCrop = crop;
     if (immediate && !mFreezeGeometryUpdates) {
@@ -1959,51 +1301,28 @@ bool Layer::setFinalCrop(const Rect& crop, bool immediate) {
 }
 
 bool Layer::setOverrideScalingMode(int32_t scalingMode) {
-    if (scalingMode == mOverrideScalingMode)
-        return false;
+    if (scalingMode == mOverrideScalingMode) return false;
     mOverrideScalingMode = scalingMode;
     setTransactionFlags(eTransactionNeeded);
     return true;
 }
 
-void Layer::setInfo(uint32_t type, uint32_t appId) {
-  mCurrentState.appId = appId;
-  mCurrentState.type = type;
-  mCurrentState.modified = true;
-  setTransactionFlags(eTransactionNeeded);
-}
-
-uint32_t Layer::getEffectiveScalingMode() const {
-    if (mOverrideScalingMode >= 0) {
-      return mOverrideScalingMode;
-    }
-    return mCurrentScalingMode;
-}
-
-bool Layer::setLayerStack(uint32_t layerStack) {
-    if (mCurrentState.layerStack == layerStack)
-        return false;
-    mCurrentState.sequence++;
-    mCurrentState.layerStack = layerStack;
+void Layer::setInfo(int32_t type, int32_t appId) {
+    mCurrentState.appId = appId;
+    mCurrentState.type = type;
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
-    return true;
 }
 
-bool Layer::setDataSpace(android_dataspace dataSpace) {
-    if (mCurrentState.dataSpace == dataSpace)
-        return false;
+bool Layer::setLayerStack(uint32_t layerStack) {
+    if (mCurrentState.layerStack == layerStack) return false;
     mCurrentState.sequence++;
-    mCurrentState.dataSpace = dataSpace;
+    mCurrentState.layerStack = layerStack;
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
     return true;
 }
 
-android_dataspace Layer::getDataSpace() const {
-    return mCurrentState.dataSpace;
-}
-
 uint32_t Layer::getLayerStack() const {
     auto p = mDrawingParent.promote();
     if (p == nullptr) {
@@ -2012,8 +1331,7 @@ uint32_t Layer::getLayerStack() const {
     return p->getLayerStack();
 }
 
-void Layer::deferTransactionUntil(const sp<Layer>& barrierLayer,
-        uint64_t frameNumber) {
+void Layer::deferTransactionUntil(const sp<Layer>& barrierLayer, uint64_t frameNumber) {
     mCurrentState.barrierLayer = barrierLayer;
     mCurrentState.frameNumber = frameNumber;
     // We don't set eTransactionNeeded, because just receiving a deferral
@@ -2025,124 +1343,16 @@ void Layer::deferTransactionUntil(const sp<Layer>& barrierLayer,
     mCurrentState.modified = false;
 }
 
-void Layer::deferTransactionUntil(const sp<IBinder>& barrierHandle,
-        uint64_t frameNumber) {
+void Layer::deferTransactionUntil(const sp<IBinder>& barrierHandle, uint64_t frameNumber) {
     sp<Handle> handle = static_cast<Handle*>(barrierHandle.get());
     deferTransactionUntil(handle->owner.promote(), frameNumber);
 }
 
-void Layer::useSurfaceDamage() {
-    if (mFlinger->mForceFullDamage) {
-        surfaceDamageRegion = Region::INVALID_REGION;
-    } else {
-        surfaceDamageRegion = mSurfaceFlingerConsumer->getSurfaceDamage();
-    }
-}
-
-void Layer::useEmptyDamage() {
-    surfaceDamageRegion.clear();
-}
 
 // ----------------------------------------------------------------------------
 // pageflip handling...
 // ----------------------------------------------------------------------------
 
-bool Layer::shouldPresentNow(const DispSync& dispSync) const {
-    if (mSidebandStreamChanged || mAutoRefresh) {
-        return true;
-    }
-
-    Mutex::Autolock lock(mQueueItemLock);
-    if (mQueueItems.empty()) {
-        return false;
-    }
-    auto timestamp = mQueueItems[0].mTimestamp;
-    nsecs_t expectedPresent =
-            mSurfaceFlingerConsumer->computeExpectedPresent(dispSync);
-
-    // Ignore timestamps more than a second in the future
-    bool isPlausible = timestamp < (expectedPresent + s2ns(1));
-    ALOGW_IF(!isPlausible, "[%s] Timestamp %" PRId64 " seems implausible "
-            "relative to expectedPresent %" PRId64, mName.string(), timestamp,
-            expectedPresent);
-
-    bool isDue = timestamp < expectedPresent;
-    return isDue || !isPlausible;
-}
-
-bool Layer::onPreComposition(nsecs_t refreshStartTime) {
-    if (mBufferLatched) {
-        Mutex::Autolock lock(mFrameEventHistoryMutex);
-        mFrameEventHistory.addPreComposition(mCurrentFrameNumber, refreshStartTime);
-    }
-    mRefreshPending = false;
-    return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh;
-}
-
-bool Layer::onPostComposition(const std::shared_ptr<FenceTime>& glDoneFence,
-        const std::shared_ptr<FenceTime>& presentFence,
-        const CompositorTiming& compositorTiming) {
-    // mFrameLatencyNeeded is true when a new frame was latched for the
-    // composition.
-    if (!mFrameLatencyNeeded)
-        return false;
-
-    // Update mFrameEventHistory.
-    {
-        Mutex::Autolock lock(mFrameEventHistoryMutex);
-        mFrameEventHistory.addPostComposition(mCurrentFrameNumber,
-                glDoneFence, presentFence, compositorTiming);
-    }
-
-    // Update mFrameTracker.
-    nsecs_t desiredPresentTime = mSurfaceFlingerConsumer->getTimestamp();
-    mFrameTracker.setDesiredPresentTime(desiredPresentTime);
-
-    std::shared_ptr<FenceTime> frameReadyFence =
-            mSurfaceFlingerConsumer->getCurrentFenceTime();
-    if (frameReadyFence->isValid()) {
-        mFrameTracker.setFrameReadyFence(std::move(frameReadyFence));
-    } else {
-        // There was no fence for this frame, so assume that it was ready
-        // to be presented at the desired present time.
-        mFrameTracker.setFrameReadyTime(desiredPresentTime);
-    }
-
-    if (presentFence->isValid()) {
-        mFrameTracker.setActualPresentFence(
-                std::shared_ptr<FenceTime>(presentFence));
-    } else {
-        // The HWC doesn't support present fences, so use the refresh
-        // timestamp instead.
-        mFrameTracker.setActualPresentTime(
-            mFlinger->getHwComposer().getRefreshTimestamp(
-                HWC_DISPLAY_PRIMARY));
-    }
-
-    mFrameTracker.advanceFrame();
-    mFrameLatencyNeeded = false;
-    return true;
-}
-
-#ifdef USE_HWC2
-void Layer::releasePendingBuffer(nsecs_t dequeueReadyTime) {
-    if (!mSurfaceFlingerConsumer->releasePendingBuffer()) {
-        return;
-    }
-
-    auto releaseFenceTime = std::make_shared<FenceTime>(
-            mSurfaceFlingerConsumer->getPrevFinalReleaseFence());
-    mReleaseTimeline.updateSignalTimes();
-    mReleaseTimeline.push(releaseFenceTime);
-
-    Mutex::Autolock lock(mFrameEventHistoryMutex);
-    if (mPreviousFrameNumber != 0) {
-        mFrameEventHistory.addRelease(mPreviousFrameNumber,
-                dequeueReadyTime, std::move(releaseFenceTime));
-    }
-}
-#endif
-
 bool Layer::isHiddenByPolicy() const {
     const Layer::State& s(mDrawingState);
     const auto& parent = mDrawingParent.promote();
@@ -2152,256 +1362,7 @@ bool Layer::isHiddenByPolicy() const {
     return s.flags & layer_state_t::eLayerHidden;
 }
 
-bool Layer::isVisible() const {
-#ifdef USE_HWC2
-    return !(isHiddenByPolicy()) && getAlpha() > 0.0f
-            && (mActiveBuffer != NULL || mSidebandStream != NULL);
-#else
-    return !(isHiddenByPolicy()) && getAlpha()
-            && (mActiveBuffer != NULL || mSidebandStream != NULL);
-#endif
-}
-
-bool Layer::allTransactionsSignaled() {
-    auto headFrameNumber = getHeadFrameNumber();
-    bool matchingFramesFound = false;
-    bool allTransactionsApplied = true;
-    Mutex::Autolock lock(mLocalSyncPointMutex);
-
-    for (auto& point : mLocalSyncPoints) {
-        if (point->getFrameNumber() > headFrameNumber) {
-            break;
-        }
-        matchingFramesFound = true;
-
-        if (!point->frameIsAvailable()) {
-           // We haven't notified the remote layer that the frame for
-           // this point is available yet. Notify it now, and then
-           // abort this attempt to latch.
-           point->setFrameAvailable();
-           allTransactionsApplied = false;
-           break;
-        }
-
-        allTransactionsApplied = allTransactionsApplied && point->transactionIsApplied();
-    }
-    return !matchingFramesFound || allTransactionsApplied;
-}
-
-Region Layer::latchBuffer(bool& recomputeVisibleRegions, nsecs_t latchTime)
-{
-    ATRACE_CALL();
-
-    if (android_atomic_acquire_cas(true, false, &mSidebandStreamChanged) == 0) {
-        // mSidebandStreamChanged was true
-        mSidebandStream = mSurfaceFlingerConsumer->getSidebandStream();
-        if (mSidebandStream != NULL) {
-            setTransactionFlags(eTransactionNeeded);
-            mFlinger->setTransactionFlags(eTraversalNeeded);
-        }
-        recomputeVisibleRegions = true;
-
-        const State& s(getDrawingState());
-        return getTransform().transform(Region(Rect(s.active.w, s.active.h)));
-    }
-
-    Region outDirtyRegion;
-    if (mQueuedFrames <= 0 && !mAutoRefresh) {
-        return outDirtyRegion;
-    }
-
-    // if we've already called updateTexImage() without going through
-    // a composition step, we have to skip this layer at this point
-    // because we cannot call updateTeximage() without a corresponding
-    // compositionComplete() call.
-    // we'll trigger an update in onPreComposition().
-    if (mRefreshPending) {
-        return outDirtyRegion;
-    }
-
-    // If the head buffer's acquire fence hasn't signaled yet, return and
-    // try again later
-    if (!headFenceHasSignaled()) {
-        mFlinger->signalLayerUpdate();
-        return outDirtyRegion;
-    }
-
-    // Capture the old state of the layer for comparisons later
-    const State& s(getDrawingState());
-    const bool oldOpacity = isOpaque(s);
-    sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer;
-
-    if (!allTransactionsSignaled()) {
-        mFlinger->signalLayerUpdate();
-        return outDirtyRegion;
-    }
-
-    // This boolean is used to make sure that SurfaceFlinger's shadow copy
-    // of the buffer queue isn't modified when the buffer queue is returning
-    // BufferItem's that weren't actually queued. This can happen in shared
-    // buffer mode.
-    bool queuedBuffer = false;
-    LayerRejecter r(mDrawingState, getCurrentState(), recomputeVisibleRegions,
-                    getProducerStickyTransform() != 0, mName.string(),
-                    mOverrideScalingMode, mFreezeGeometryUpdates);
-    status_t updateResult = mSurfaceFlingerConsumer->updateTexImage(&r,
-            mFlinger->mPrimaryDispSync, &mAutoRefresh, &queuedBuffer,
-            mLastFrameNumberReceived);
-    if (updateResult == BufferQueue::PRESENT_LATER) {
-        // Producer doesn't want buffer to be displayed yet.  Signal a
-        // layer update so we check again at the next opportunity.
-        mFlinger->signalLayerUpdate();
-        return outDirtyRegion;
-    } else if (updateResult == SurfaceFlingerConsumer::BUFFER_REJECTED) {
-        // If the buffer has been rejected, remove it from the shadow queue
-        // and return early
-        if (queuedBuffer) {
-            Mutex::Autolock lock(mQueueItemLock);
-            mQueueItems.removeAt(0);
-            android_atomic_dec(&mQueuedFrames);
-        }
-        return outDirtyRegion;
-    } else if (updateResult != NO_ERROR || mUpdateTexImageFailed) {
-        // This can occur if something goes wrong when trying to create the
-        // EGLImage for this buffer. If this happens, the buffer has already
-        // been released, so we need to clean up the queue and bug out
-        // early.
-        if (queuedBuffer) {
-            Mutex::Autolock lock(mQueueItemLock);
-            mQueueItems.clear();
-            android_atomic_and(0, &mQueuedFrames);
-        }
-
-        // Once we have hit this state, the shadow queue may no longer
-        // correctly reflect the incoming BufferQueue's contents, so even if
-        // updateTexImage starts working, the only safe course of action is
-        // to continue to ignore updates.
-        mUpdateTexImageFailed = true;
-
-        return outDirtyRegion;
-    }
-
-    if (queuedBuffer) {
-        // Autolock scope
-        auto currentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
-
-        Mutex::Autolock lock(mQueueItemLock);
-
-        // Remove any stale buffers that have been dropped during
-        // updateTexImage
-        while (mQueueItems[0].mFrameNumber != currentFrameNumber) {
-            mQueueItems.removeAt(0);
-            android_atomic_dec(&mQueuedFrames);
-        }
-
-        mQueueItems.removeAt(0);
-    }
-
-
-    // Decrement the queued-frames count.  Signal another event if we
-    // have more frames pending.
-    if ((queuedBuffer && android_atomic_dec(&mQueuedFrames) > 1)
-            || mAutoRefresh) {
-        mFlinger->signalLayerUpdate();
-    }
-
-    // update the active buffer
-    mActiveBuffer = mSurfaceFlingerConsumer->getCurrentBuffer(
-            &mActiveBufferSlot);
-    if (mActiveBuffer == NULL) {
-        // this can only happen if the very first buffer was rejected.
-        return outDirtyRegion;
-    }
-
-    mBufferLatched = true;
-    mPreviousFrameNumber = mCurrentFrameNumber;
-    mCurrentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
-
-    {
-        Mutex::Autolock lock(mFrameEventHistoryMutex);
-        mFrameEventHistory.addLatch(mCurrentFrameNumber, latchTime);
-#ifndef USE_HWC2
-        auto releaseFenceTime = std::make_shared<FenceTime>(
-                mSurfaceFlingerConsumer->getPrevFinalReleaseFence());
-        mReleaseTimeline.updateSignalTimes();
-        mReleaseTimeline.push(releaseFenceTime);
-        if (mPreviousFrameNumber != 0) {
-            mFrameEventHistory.addRelease(mPreviousFrameNumber,
-                    latchTime, std::move(releaseFenceTime));
-        }
-#endif
-    }
-
-    mRefreshPending = true;
-    mFrameLatencyNeeded = true;
-    if (oldActiveBuffer == NULL) {
-         // the first time we receive a buffer, we need to trigger a
-         // geometry invalidation.
-        recomputeVisibleRegions = true;
-     }
-
-    setDataSpace(mSurfaceFlingerConsumer->getCurrentDataSpace());
-
-    Rect crop(mSurfaceFlingerConsumer->getCurrentCrop());
-    const uint32_t transform(mSurfaceFlingerConsumer->getCurrentTransform());
-    const uint32_t scalingMode(mSurfaceFlingerConsumer->getCurrentScalingMode());
-    if ((crop != mCurrentCrop) ||
-        (transform != mCurrentTransform) ||
-        (scalingMode != mCurrentScalingMode))
-    {
-        mCurrentCrop = crop;
-        mCurrentTransform = transform;
-        mCurrentScalingMode = scalingMode;
-        recomputeVisibleRegions = true;
-    }
-
-    if (oldActiveBuffer != NULL) {
-        uint32_t bufWidth  = mActiveBuffer->getWidth();
-        uint32_t bufHeight = mActiveBuffer->getHeight();
-        if (bufWidth != uint32_t(oldActiveBuffer->width) ||
-            bufHeight != uint32_t(oldActiveBuffer->height)) {
-            recomputeVisibleRegions = true;
-        }
-    }
-
-    mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format);
-    if (oldOpacity != isOpaque(s)) {
-        recomputeVisibleRegions = true;
-    }
-
-    // Remove any sync points corresponding to the buffer which was just
-    // latched
-    {
-        Mutex::Autolock lock(mLocalSyncPointMutex);
-        auto point = mLocalSyncPoints.begin();
-        while (point != mLocalSyncPoints.end()) {
-            if (!(*point)->frameIsAvailable() ||
-                    !(*point)->transactionIsApplied()) {
-                // This sync point must have been added since we started
-                // latching. Don't drop it yet.
-                ++point;
-                continue;
-            }
-
-            if ((*point)->getFrameNumber() <= mCurrentFrameNumber) {
-                point = mLocalSyncPoints.erase(point);
-            } else {
-                ++point;
-            }
-        }
-    }
-
-    // FIXME: postedRegion should be dirty & bounds
-    Region dirtyRegion(Rect(s.active.w, s.active.h));
-
-    // transform the dirty region to window-manager space
-    outDirtyRegion = (getTransform().transform(dirtyRegion));
-
-    return outDirtyRegion;
-}
-
-uint32_t Layer::getEffectiveUsage(uint32_t usage) const
-{
+uint32_t Layer::getEffectiveUsage(uint32_t usage) const {
     // TODO: should we do something special if mSecure is set?
     if (mProtectedByApp) {
         // need a hardware-protected path to external video sink
@@ -2426,7 +1387,7 @@ void Layer::updateTransformHint(const sp<const DisplayDevice>& hw) const {
             orientation = 0;
         }
     }
-    mSurfaceFlingerConsumer->setTransformHint(orientation);
+    setTransformHint(orientation);
 }
 
 // ----------------------------------------------------------------------------
@@ -2451,21 +1412,21 @@ LayerDebugInfo Layer::getLayerDebugInfo() const {
     info.mHeight = ds.active.h;
     info.mCrop = ds.crop;
     info.mFinalCrop = ds.finalCrop;
-    info.mAlpha = ds.alpha;
+    info.mColor = ds.color;
     info.mFlags = ds.flags;
     info.mPixelFormat = getPixelFormat();
-    info.mDataSpace = getDataSpace();
+    info.mDataSpace = static_cast<android_dataspace>(mCurrentDataSpace);
     info.mMatrix[0][0] = ds.active.transform[0][0];
     info.mMatrix[0][1] = ds.active.transform[0][1];
     info.mMatrix[1][0] = ds.active.transform[1][0];
     info.mMatrix[1][1] = ds.active.transform[1][1];
     {
-        sp<const GraphicBuffer> activeBuffer = getActiveBuffer();
-        if (activeBuffer != 0) {
-            info.mActiveBufferWidth = activeBuffer->getWidth();
-            info.mActiveBufferHeight = activeBuffer->getHeight();
-            info.mActiveBufferStride = activeBuffer->getStride();
-            info.mActiveBufferFormat = activeBuffer->format;
+        sp<const GraphicBuffer> buffer = getBE().compositionInfo.mBuffer;
+        if (buffer != 0) {
+            info.mActiveBufferWidth = buffer->getWidth();
+            info.mActiveBufferHeight = buffer->getHeight();
+            info.mActiveBufferStride = buffer->getStride();
+            info.mActiveBufferFormat = buffer->format;
         } else {
             info.mActiveBufferWidth = 0;
             info.mActiveBufferHeight = 0;
@@ -2480,7 +1441,6 @@ LayerDebugInfo Layer::getLayerDebugInfo() const {
     return info;
 }
 
-#ifdef USE_HWC2
 void Layer::miniDumpHeader(String8& result) {
     result.append("----------------------------------------");
     result.append("---------------------------------------\n");
@@ -2494,7 +1454,7 @@ void Layer::miniDumpHeader(String8& result) {
 }
 
 void Layer::miniDump(String8& result, int32_t hwcId) const {
-    if (mHwcLayers.count(hwcId) == 0) {
+    if (getBE().mHwcLayers.count(hwcId) == 0) {
         return;
     }
 
@@ -2512,21 +1472,21 @@ void Layer::miniDump(String8& result, int32_t hwcId) const {
     result.appendFormat(" %s\n", name.string());
 
     const Layer::State& layerState(getDrawingState());
-    const HWCInfo& hwcInfo = mHwcLayers.at(hwcId);
-    result.appendFormat("  %10u | ", layerState.z);
-    result.appendFormat("%10s | ",
-            to_string(getCompositionType(hwcId)).c_str());
+    const LayerBE::HWCInfo& hwcInfo = getBE().mHwcLayers.at(hwcId);
+    if (layerState.zOrderRelativeOf != nullptr || mDrawingParent != nullptr) {
+        result.appendFormat("  rel %6d | ", layerState.z);
+    } else {
+        result.appendFormat("  %10d | ", layerState.z);
+    }
+    result.appendFormat("%10s | ", to_string(getCompositionType(hwcId)).c_str());
     const Rect& frame = hwcInfo.displayFrame;
-    result.appendFormat("%4d %4d %4d %4d | ", frame.left, frame.top,
-            frame.right, frame.bottom);
+    result.appendFormat("%4d %4d %4d %4d | ", frame.left, frame.top, frame.right, frame.bottom);
     const FloatRect& crop = hwcInfo.sourceCrop;
-    result.appendFormat("%6.1f %6.1f %6.1f %6.1f\n", crop.left, crop.top,
-            crop.right, crop.bottom);
+    result.appendFormat("%6.1f %6.1f %6.1f %6.1f\n", crop.left, crop.top, crop.right, crop.bottom);
 
     result.append("- - - - - - - - - - - - - - - - - - - - ");
     result.append("- - - - - - - - - - - - - - - - - - - -\n");
 }
-#endif
 
 void Layer::dumpFrameStats(String8& result) const {
     mFrameTracker.dumpStats(result);
@@ -2545,8 +1505,7 @@ void Layer::getFrameStats(FrameStats* outStats) const {
 }
 
 void Layer::dumpFrameEvents(String8& result) {
-    result.appendFormat("- Layer %s (%s, %p)\n",
-            getName().string(), getTypeId(), this);
+    result.appendFormat("- Layer %s (%s, %p)\n", getName().string(), getTypeId(), this);
     Mutex::Autolock lock(mFrameEventHistoryMutex);
     mFrameEventHistory.checkFencesForCompletion();
     mFrameEventHistory.dump(result);
@@ -2555,10 +1514,16 @@ void Layer::dumpFrameEvents(String8& result) {
 void Layer::onDisconnect() {
     Mutex::Autolock lock(mFrameEventHistoryMutex);
     mFrameEventHistory.onDisconnect();
+    mTimeStats.onDisconnect(getName().c_str());
 }
 
 void Layer::addAndGetFrameTimestamps(const NewFrameEventsEntry* newTimestamps,
-        FrameEventHistoryDelta *outDelta) {
+                                     FrameEventHistoryDelta* outDelta) {
+    if (newTimestamps) {
+        mTimeStats.setPostTime(getName().c_str(), newTimestamps->frameNumber,
+                               newTimestamps->postedTime);
+    }
+
     Mutex::Autolock lock(mFrameEventHistoryMutex);
     if (newTimestamps) {
         // If there are any unsignaled fences in the aquire timeline at this
@@ -2576,23 +1541,6 @@ void Layer::addAndGetFrameTimestamps(const NewFrameEventsEntry* newTimestamps,
     }
 }
 
-std::vector<OccupancyTracker::Segment> Layer::getOccupancyHistory(
-        bool forceFlush) {
-    std::vector<OccupancyTracker::Segment> history;
-    status_t result = mSurfaceFlingerConsumer->getOccupancyHistory(forceFlush,
-            &history);
-    if (result != NO_ERROR) {
-        ALOGW("[%s] Failed to obtain occupancy history (%d)", mName.string(),
-                result);
-        return {};
-    }
-    return history;
-}
-
-bool Layer::getTransformToDisplayInverse() const {
-    return mSurfaceFlingerConsumer->getTransformToDisplayInverse();
-}
-
 size_t Layer::getChildrenCount() const {
     size_t count = 0;
     for (const sp<Layer>& child : mCurrentChildren) {
@@ -2629,7 +1577,7 @@ bool Layer::reparentChildren(const sp<IBinder>& newParentHandle) {
 
         sp<Client> client(child->mClientRef.promote());
         if (client != nullptr) {
-            client->setParentLayer(newParent);
+            client->updateParent(newParent);
         }
     }
     mCurrentChildren.clear();
@@ -2637,21 +1585,59 @@ bool Layer::reparentChildren(const sp<IBinder>& newParentHandle) {
     return true;
 }
 
-bool Layer::detachChildren() {
-    traverseInZOrder(LayerVector::StateSet::Drawing, [this](Layer* child) {
-        if (child == this) {
-            return;
-        }
+void Layer::setChildrenDrawingParent(const sp<Layer>& newParent) {
+    for (const sp<Layer>& child : mDrawingChildren) {
+        child->mDrawingParent = newParent;
+    }
+}
+
+bool Layer::reparent(const sp<IBinder>& newParentHandle) {
+    if (newParentHandle == nullptr) {
+        return false;
+    }
 
+    auto handle = static_cast<Handle*>(newParentHandle.get());
+    sp<Layer> newParent = handle->owner.promote();
+    if (newParent == nullptr) {
+        ALOGE("Unable to promote Layer handle");
+        return false;
+    }
+
+    sp<Layer> parent = getParent();
+    if (parent != nullptr) {
+        parent->removeChild(this);
+    }
+    newParent->addChild(this);
+
+    sp<Client> client(mClientRef.promote());
+    sp<Client> newParentClient(newParent->mClientRef.promote());
+
+    if (client != newParentClient) {
+        client->updateParent(newParent);
+    }
+
+    return true;
+}
+
+bool Layer::detachChildren() {
+    for (const sp<Layer>& child : mCurrentChildren) {
+        sp<Client> parentClient = mClientRef.promote();
         sp<Client> client(child->mClientRef.promote());
-        if (client != nullptr) {
-            client->detachLayer(child);
+        if (client != nullptr && parentClient != client) {
+            client->detachLayer(child.get());
+            child->detachChildren();
         }
-    });
+    }
 
     return true;
 }
 
+bool Layer::isLegacyDataSpace() const {
+    // return true when no higher bits are set
+    return !(mCurrentDataSpace & (ui::Dataspace::STANDARD_MASK |
+                ui::Dataspace::TRANSFER_MASK | ui::Dataspace::RANGE_MASK));
+}
+
 void Layer::setParent(const sp<Layer>& layer) {
     mCurrentParent = layer;
 }
@@ -2672,8 +1658,14 @@ int32_t Layer::getZ() const {
     return mDrawingState.z;
 }
 
-__attribute__((no_sanitize("unsigned-integer-overflow")))
-LayerVector Layer::makeTraversalList(LayerVector::StateSet stateSet) {
+bool Layer::usingRelativeZ(LayerVector::StateSet stateSet) {
+    const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
+    const State& state = useDrawing ? mDrawingState : mCurrentState;
+    return state.zOrderRelativeOf != nullptr;
+}
+
+__attribute__((no_sanitize("unsigned-integer-overflow"))) LayerVector Layer::makeTraversalList(
+        LayerVector::StateSet stateSet, bool* outSkipRelativeZUsers) {
     LOG_ALWAYS_FATAL_IF(stateSet == LayerVector::StateSet::Invalid,
                         "makeTraversalList received invalid stateSet");
     const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
@@ -2681,10 +1673,11 @@ LayerVector Layer::makeTraversalList(LayerVector::StateSet stateSet) {
     const State& state = useDrawing ? mDrawingState : mCurrentState;
 
     if (state.zOrderRelatives.size() == 0) {
+        *outSkipRelativeZUsers = true;
         return children;
     }
-    LayerVector traverse;
 
+    LayerVector traverse(stateSet);
     for (const wp<Layer>& weakRelative : state.zOrderRelatives) {
         sp<Layer> strongRelative = weakRelative.promote();
         if (strongRelative != nullptr) {
@@ -2693,6 +1686,10 @@ LayerVector Layer::makeTraversalList(LayerVector::StateSet stateSet) {
     }
 
     for (const sp<Layer>& child : children) {
+        const State& childState = useDrawing ? child->mDrawingState : child->mCurrentState;
+        if (childState.zOrderRelativeOf != nullptr) {
+            continue;
+        }
         traverse.add(child);
     }
 
@@ -2703,19 +1700,35 @@ LayerVector Layer::makeTraversalList(LayerVector::StateSet stateSet) {
  * Negatively signed relatives are before 'this' in Z-order.
  */
 void Layer::traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::Visitor& visitor) {
-    LayerVector list = makeTraversalList(stateSet);
+    // In the case we have other layers who are using a relative Z to us, makeTraversalList will
+    // produce a new list for traversing, including our relatives, and not including our children
+    // who are relatives of another surface. In the case that there are no relative Z,
+    // makeTraversalList returns our children directly to avoid significant overhead.
+    // However in this case we need to take the responsibility for filtering children which
+    // are relatives of another surface here.
+    bool skipRelativeZUsers = false;
+    const LayerVector list = makeTraversalList(stateSet, &skipRelativeZUsers);
 
     size_t i = 0;
     for (; i < list.size(); i++) {
         const auto& relative = list[i];
+        if (skipRelativeZUsers && relative->usingRelativeZ(stateSet)) {
+            continue;
+        }
+
         if (relative->getZ() >= 0) {
             break;
         }
         relative->traverseInZOrder(stateSet, visitor);
     }
+
     visitor(this);
     for (; i < list.size(); i++) {
         const auto& relative = list[i];
+
+        if (skipRelativeZUsers && relative->usingRelativeZ(stateSet)) {
+            continue;
+        }
         relative->traverseInZOrder(stateSet, visitor);
     }
 }
@@ -2725,23 +1738,110 @@ void Layer::traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::
  */
 void Layer::traverseInReverseZOrder(LayerVector::StateSet stateSet,
                                     const LayerVector::Visitor& visitor) {
-    LayerVector list = makeTraversalList(stateSet);
+    // See traverseInZOrder for documentation.
+    bool skipRelativeZUsers = false;
+    LayerVector list = makeTraversalList(stateSet, &skipRelativeZUsers);
 
     int32_t i = 0;
     for (i = int32_t(list.size()) - 1; i >= 0; i--) {
         const auto& relative = list[i];
+
+        if (skipRelativeZUsers && relative->usingRelativeZ(stateSet)) {
+            continue;
+        }
+
         if (relative->getZ() < 0) {
             break;
         }
         relative->traverseInReverseZOrder(stateSet, visitor);
     }
     visitor(this);
-    for (; i>=0; i--) {
+    for (; i >= 0; i--) {
         const auto& relative = list[i];
+
+        if (skipRelativeZUsers && relative->usingRelativeZ(stateSet)) {
+            continue;
+        }
+
         relative->traverseInReverseZOrder(stateSet, visitor);
     }
 }
 
+LayerVector Layer::makeChildrenTraversalList(LayerVector::StateSet stateSet,
+                                             const std::vector<Layer*>& layersInTree) {
+    LOG_ALWAYS_FATAL_IF(stateSet == LayerVector::StateSet::Invalid,
+                        "makeTraversalList received invalid stateSet");
+    const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
+    const LayerVector& children = useDrawing ? mDrawingChildren : mCurrentChildren;
+    const State& state = useDrawing ? mDrawingState : mCurrentState;
+
+    LayerVector traverse(stateSet);
+    for (const wp<Layer>& weakRelative : state.zOrderRelatives) {
+        sp<Layer> strongRelative = weakRelative.promote();
+        // Only add relative layers that are also descendents of the top most parent of the tree.
+        // If a relative layer is not a descendent, then it should be ignored.
+        if (std::binary_search(layersInTree.begin(), layersInTree.end(), strongRelative.get())) {
+            traverse.add(strongRelative);
+        }
+    }
+
+    for (const sp<Layer>& child : children) {
+        const State& childState = useDrawing ? child->mDrawingState : child->mCurrentState;
+        // If a layer has a relativeOf layer, only ignore if the layer it's relative to is a
+        // descendent of the top most parent of the tree. If it's not a descendent, then just add
+        // the child here since it won't be added later as a relative.
+        if (std::binary_search(layersInTree.begin(), layersInTree.end(),
+                               childState.zOrderRelativeOf.promote().get())) {
+            continue;
+        }
+        traverse.add(child);
+    }
+
+    return traverse;
+}
+
+void Layer::traverseChildrenInZOrderInner(const std::vector<Layer*>& layersInTree,
+                                          LayerVector::StateSet stateSet,
+                                          const LayerVector::Visitor& visitor) {
+    const LayerVector list = makeChildrenTraversalList(stateSet, layersInTree);
+
+    size_t i = 0;
+    for (; i < list.size(); i++) {
+        const auto& relative = list[i];
+        if (relative->getZ() >= 0) {
+            break;
+        }
+        relative->traverseChildrenInZOrderInner(layersInTree, stateSet, visitor);
+    }
+
+    visitor(this);
+    for (; i < list.size(); i++) {
+        const auto& relative = list[i];
+        relative->traverseChildrenInZOrderInner(layersInTree, stateSet, visitor);
+    }
+}
+
+std::vector<Layer*> Layer::getLayersInTree(LayerVector::StateSet stateSet) {
+    const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
+    const LayerVector& children = useDrawing ? mDrawingChildren : mCurrentChildren;
+
+    std::vector<Layer*> layersInTree = {this};
+    for (size_t i = 0; i < children.size(); i++) {
+        const auto& child = children[i];
+        std::vector<Layer*> childLayers = child->getLayersInTree(stateSet);
+        layersInTree.insert(layersInTree.end(), childLayers.cbegin(), childLayers.cend());
+    }
+
+    return layersInTree;
+}
+
+void Layer::traverseChildrenInZOrder(LayerVector::StateSet stateSet,
+                                     const LayerVector::Visitor& visitor) {
+    std::vector<Layer*> layersInTree = getLayersInTree(stateSet);
+    std::sort(layersInTree.begin(), layersInTree.end());
+    traverseChildrenInZOrderInner(layersInTree, stateSet, visitor);
+}
+
 Transform Layer::getTransform() const {
     Transform t;
     const auto& p = mDrawingParent.promote();
@@ -2753,20 +1853,18 @@ Transform Layer::getTransform() const {
         // for in the transform. We need to mirror this scaling in child surfaces
         // or we will break the contract where WM can treat child surfaces as
         // pixels in the parent surface.
-        if (p->isFixedSize() && p->mActiveBuffer != nullptr) {
+        if (p->isFixedSize() && p->getBE().compositionInfo.mBuffer != nullptr) {
             int bufferWidth;
             int bufferHeight;
             if ((p->mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) == 0) {
-                bufferWidth = p->mActiveBuffer->getWidth();
-                bufferHeight = p->mActiveBuffer->getHeight();
+                bufferWidth = p->getBE().compositionInfo.mBuffer->getWidth();
+                bufferHeight = p->getBE().compositionInfo.mBuffer->getHeight();
             } else {
-                bufferHeight = p->mActiveBuffer->getWidth();
-                bufferWidth = p->mActiveBuffer->getHeight();
+                bufferHeight = p->getBE().compositionInfo.mBuffer->getWidth();
+                bufferWidth = p->getBE().compositionInfo.mBuffer->getHeight();
             }
-            float sx = p->getDrawingState().active.w /
-                    static_cast<float>(bufferWidth);
-            float sy = p->getDrawingState().active.h /
-                    static_cast<float>(bufferHeight);
+            float sx = p->getDrawingState().active.w / static_cast<float>(bufferWidth);
+            float sy = p->getDrawingState().active.h / static_cast<float>(bufferHeight);
             Transform extraParentScaling;
             extraParentScaling.set(sx, 0, 0, sy);
             t = t * extraParentScaling;
@@ -2775,23 +1873,17 @@ Transform Layer::getTransform() const {
     return t * getDrawingState().active.transform;
 }
 
-#ifdef USE_HWC2
-float Layer::getAlpha() const {
+half Layer::getAlpha() const {
     const auto& p = mDrawingParent.promote();
 
-    float parentAlpha = (p != nullptr) ? p->getAlpha() : 1.0;
-    return parentAlpha * getDrawingState().alpha;
+    half parentAlpha = (p != nullptr) ? p->getAlpha() : 1.0_hf;
+    return parentAlpha * getDrawingState().color.a;
 }
-#else
-uint8_t Layer::getAlpha() const {
-    const auto& p = mDrawingParent.promote();
 
-    float parentAlpha = (p != nullptr) ? (p->getAlpha() / 255.0f) : 1.0;
-    float drawingAlpha = getDrawingState().alpha / 255.0f;
-    drawingAlpha = drawingAlpha * parentAlpha;
-    return static_cast<uint8_t>(std::round(drawingAlpha * 255));
+half4 Layer::getColor() const {
+    const half4 color(getDrawingState().color);
+    return half4(color.r, color.g, color.b, getAlpha());
 }
-#endif
 
 void Layer::commitChildList() {
     for (size_t i = 0; i < mCurrentChildren.size(); i++) {
@@ -2802,6 +1894,113 @@ void Layer::commitChildList() {
     mDrawingParent = mCurrentParent;
 }
 
+void Layer::writeToProto(LayerProto* layerInfo, LayerVector::StateSet stateSet) {
+    const bool useDrawing = stateSet == LayerVector::StateSet::Drawing;
+    const LayerVector& children = useDrawing ? mDrawingChildren : mCurrentChildren;
+    const State& state = useDrawing ? mDrawingState : mCurrentState;
+
+    Transform requestedTransform = state.active.transform;
+    Transform transform = getTransform();
+
+    layerInfo->set_id(sequence);
+    layerInfo->set_name(getName().c_str());
+    layerInfo->set_type(String8(getTypeId()));
+
+    for (const auto& child : children) {
+        layerInfo->add_children(child->sequence);
+    }
+
+    for (const wp<Layer>& weakRelative : state.zOrderRelatives) {
+        sp<Layer> strongRelative = weakRelative.promote();
+        if (strongRelative != nullptr) {
+            layerInfo->add_relatives(strongRelative->sequence);
+        }
+    }
+
+    LayerProtoHelper::writeToProto(state.activeTransparentRegion,
+                                   layerInfo->mutable_transparent_region());
+    LayerProtoHelper::writeToProto(visibleRegion, layerInfo->mutable_visible_region());
+    LayerProtoHelper::writeToProto(surfaceDamageRegion, layerInfo->mutable_damage_region());
+
+    layerInfo->set_layer_stack(getLayerStack());
+    layerInfo->set_z(state.z);
+
+    PositionProto* position = layerInfo->mutable_position();
+    position->set_x(transform.tx());
+    position->set_y(transform.ty());
+
+    PositionProto* requestedPosition = layerInfo->mutable_requested_position();
+    requestedPosition->set_x(requestedTransform.tx());
+    requestedPosition->set_y(requestedTransform.ty());
+
+    SizeProto* size = layerInfo->mutable_size();
+    size->set_w(state.active.w);
+    size->set_h(state.active.h);
+
+    LayerProtoHelper::writeToProto(state.crop, layerInfo->mutable_crop());
+    LayerProtoHelper::writeToProto(state.finalCrop, layerInfo->mutable_final_crop());
+
+    layerInfo->set_is_opaque(isOpaque(state));
+    layerInfo->set_invalidate(contentDirty);
+
+    // XXX (b/79210409) mCurrentDataSpace is not protected
+    layerInfo->set_dataspace(dataspaceDetails(static_cast<android_dataspace>(mCurrentDataSpace)));
+
+    layerInfo->set_pixel_format(decodePixelFormat(getPixelFormat()));
+    LayerProtoHelper::writeToProto(getColor(), layerInfo->mutable_color());
+    LayerProtoHelper::writeToProto(state.color, layerInfo->mutable_requested_color());
+    layerInfo->set_flags(state.flags);
+
+    LayerProtoHelper::writeToProto(transform, layerInfo->mutable_transform());
+    LayerProtoHelper::writeToProto(requestedTransform, layerInfo->mutable_requested_transform());
+
+    auto parent = useDrawing ? mDrawingParent.promote() : mCurrentParent.promote();
+    if (parent != nullptr) {
+        layerInfo->set_parent(parent->sequence);
+    }
+
+    auto zOrderRelativeOf = state.zOrderRelativeOf.promote();
+    if (zOrderRelativeOf != nullptr) {
+        layerInfo->set_z_order_relative_of(zOrderRelativeOf->sequence);
+    }
+
+    // XXX getBE().compositionInfo.mBuffer is not protected
+    auto buffer = getBE().compositionInfo.mBuffer;
+    if (buffer != nullptr) {
+        LayerProtoHelper::writeToProto(buffer, layerInfo->mutable_active_buffer());
+    }
+
+    layerInfo->set_queued_frames(getQueuedFrameCount());
+    layerInfo->set_refresh_pending(isBufferLatched());
+    layerInfo->set_window_type(state.type);
+    layerInfo->set_app_id(state.appId);
+}
+
+void Layer::writeToProto(LayerProto* layerInfo, int32_t hwcId) {
+    writeToProto(layerInfo, LayerVector::StateSet::Drawing);
+
+    const auto& hwcInfo = getBE().mHwcLayers.at(hwcId);
+
+    const Rect& frame = hwcInfo.displayFrame;
+    LayerProtoHelper::writeToProto(frame, layerInfo->mutable_hwc_frame());
+
+    const FloatRect& crop = hwcInfo.sourceCrop;
+    LayerProtoHelper::writeToProto(crop, layerInfo->mutable_hwc_crop());
+
+    const int32_t transform = static_cast<int32_t>(hwcInfo.transform);
+    layerInfo->set_hwc_transform(transform);
+
+    const int32_t compositionType = static_cast<int32_t>(hwcInfo.compositionType);
+    layerInfo->set_hwc_composition_type(compositionType);
+
+    if (std::strcmp(getTypeId(), "BufferLayer") == 0 &&
+        static_cast<BufferLayer*>(this)->isProtected()) {
+        layerInfo->set_is_protected(true);
+    } else {
+        layerInfo->set_is_protected(false);
+    }
+}
+
 // ---------------------------------------------------------------------------
 
 }; // namespace android