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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <GpuMemoryTracker.h>
     18 #include "CanvasContext.h"
     19 
     20 #include "AnimationContext.h"
     21 #include "Caches.h"
     22 #include "EglManager.h"
     23 #include "Frame.h"
     24 #include "LayerUpdateQueue.h"
     25 #include "Properties.h"
     26 #include "RenderThread.h"
     27 #include "hwui/Canvas.h"
     28 #include "renderstate/RenderState.h"
     29 #include "renderstate/Stencil.h"
     30 #include "protos/hwui.pb.h"
     31 #include "OpenGLPipeline.h"
     32 #include "pipeline/skia/SkiaOpenGLPipeline.h"
     33 #include "pipeline/skia/SkiaPipeline.h"
     34 #include "pipeline/skia/SkiaVulkanPipeline.h"
     35 #include "utils/GLUtils.h"
     36 #include "utils/TimeUtils.h"
     37 
     38 #include <cutils/properties.h>
     39 #include <google/protobuf/io/zero_copy_stream_impl.h>
     40 #include <private/hwui/DrawGlInfo.h>
     41 #include <strings.h>
     42 
     43 #include <algorithm>
     44 #include <fcntl.h>
     45 #include <sys/stat.h>
     46 
     47 #include <cstdlib>
     48 
     49 #define TRIM_MEMORY_COMPLETE 80
     50 #define TRIM_MEMORY_UI_HIDDEN 20
     51 
     52 #define ENABLE_RENDERNODE_SERIALIZATION false
     53 
     54 #define LOG_FRAMETIME_MMA 0
     55 
     56 #if LOG_FRAMETIME_MMA
     57 static float sBenchMma = 0;
     58 static int sFrameCount = 0;
     59 static const float NANOS_PER_MILLIS_F = 1000000.0f;
     60 #endif
     61 
     62 namespace android {
     63 namespace uirenderer {
     64 namespace renderthread {
     65 
     66 CanvasContext* CanvasContext::create(RenderThread& thread,
     67         bool translucent, RenderNode* rootRenderNode, IContextFactory* contextFactory) {
     68 
     69     auto renderType = Properties::getRenderPipelineType();
     70 
     71     switch (renderType) {
     72         case RenderPipelineType::OpenGL:
     73             return new CanvasContext(thread, translucent, rootRenderNode, contextFactory,
     74                     std::make_unique<OpenGLPipeline>(thread));
     75         case RenderPipelineType::SkiaGL:
     76             return new CanvasContext(thread, translucent, rootRenderNode, contextFactory,
     77                     std::make_unique<skiapipeline::SkiaOpenGLPipeline>(thread));
     78         case RenderPipelineType::SkiaVulkan:
     79             return new CanvasContext(thread, translucent, rootRenderNode, contextFactory,
     80                                 std::make_unique<skiapipeline::SkiaVulkanPipeline>(thread));
     81         default:
     82             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
     83             break;
     84     }
     85     return nullptr;
     86 }
     87 
     88 void CanvasContext::destroyLayer(RenderNode* node) {
     89     auto renderType = Properties::getRenderPipelineType();
     90     switch (renderType) {
     91         case RenderPipelineType::OpenGL:
     92             OpenGLPipeline::destroyLayer(node);
     93             break;
     94         case RenderPipelineType::SkiaGL:
     95         case RenderPipelineType::SkiaVulkan:
     96             skiapipeline::SkiaPipeline::destroyLayer(node);
     97             break;
     98         default:
     99             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
    100             break;
    101     }
    102 }
    103 
    104 void CanvasContext::invokeFunctor(const RenderThread& thread, Functor* functor) {
    105     ATRACE_CALL();
    106     auto renderType = Properties::getRenderPipelineType();
    107     switch (renderType) {
    108         case RenderPipelineType::OpenGL:
    109             OpenGLPipeline::invokeFunctor(thread, functor);
    110             break;
    111         case RenderPipelineType::SkiaGL:
    112             skiapipeline::SkiaOpenGLPipeline::invokeFunctor(thread, functor);
    113             break;
    114         case RenderPipelineType::SkiaVulkan:
    115             skiapipeline::SkiaVulkanPipeline::invokeFunctor(thread, functor);
    116             break;
    117         default:
    118             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
    119             break;
    120     }
    121 }
    122 
    123 void CanvasContext::prepareToDraw(const RenderThread& thread, Bitmap* bitmap) {
    124     auto renderType = Properties::getRenderPipelineType();
    125     switch (renderType) {
    126         case RenderPipelineType::OpenGL:
    127             OpenGLPipeline::prepareToDraw(thread, bitmap);
    128             break;
    129         case RenderPipelineType::SkiaGL:
    130         case RenderPipelineType::SkiaVulkan:
    131             skiapipeline::SkiaPipeline::prepareToDraw(thread, bitmap);
    132             break;
    133         default:
    134             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
    135             break;
    136     }
    137 }
    138 
    139 CanvasContext::CanvasContext(RenderThread& thread, bool translucent,
    140         RenderNode* rootRenderNode, IContextFactory* contextFactory,
    141         std::unique_ptr<IRenderPipeline> renderPipeline)
    142         : mRenderThread(thread)
    143         , mOpaque(!translucent)
    144         , mAnimationContext(contextFactory->createAnimationContext(mRenderThread.timeLord()))
    145         , mJankTracker(&thread.globalProfileData(), thread.mainDisplayInfo())
    146         , mProfiler(mJankTracker.frames())
    147         , mContentDrawBounds(0, 0, 0, 0)
    148         , mRenderPipeline(std::move(renderPipeline)) {
    149     rootRenderNode->makeRoot();
    150     mRenderNodes.emplace_back(rootRenderNode);
    151     mRenderThread.renderState().registerCanvasContext(this);
    152     mProfiler.setDensity(mRenderThread.mainDisplayInfo().density);
    153 }
    154 
    155 CanvasContext::~CanvasContext() {
    156     destroy();
    157     mRenderThread.renderState().unregisterCanvasContext(this);
    158     for (auto& node : mRenderNodes) {
    159         node->clearRoot();
    160     }
    161     mRenderNodes.clear();
    162 }
    163 
    164 void CanvasContext::addRenderNode(RenderNode* node, bool placeFront) {
    165     int pos = placeFront ? 0 : static_cast<int>(mRenderNodes.size());
    166     node->makeRoot();
    167     mRenderNodes.emplace(mRenderNodes.begin() + pos, node);
    168 }
    169 
    170 void CanvasContext::removeRenderNode(RenderNode* node) {
    171     node->clearRoot();
    172     mRenderNodes.erase(std::remove(mRenderNodes.begin(), mRenderNodes.end(), node),
    173             mRenderNodes.end());
    174 }
    175 
    176 void CanvasContext::destroy() {
    177     stopDrawing();
    178     setSurface(nullptr);
    179     freePrefetchedLayers();
    180     destroyHardwareResources();
    181     mAnimationContext->destroy();
    182 }
    183 
    184 void CanvasContext::setSurface(Surface* surface) {
    185     ATRACE_CALL();
    186 
    187     mNativeSurface = surface;
    188 
    189     ColorMode colorMode = mWideColorGamut ? ColorMode::WideColorGamut : ColorMode::Srgb;
    190     bool hasSurface = mRenderPipeline->setSurface(surface, mSwapBehavior, colorMode);
    191 
    192     mFrameNumber = -1;
    193 
    194     if (hasSurface) {
    195          mHaveNewSurface = true;
    196          mSwapHistory.clear();
    197     } else {
    198          mRenderThread.removeFrameCallback(this);
    199     }
    200 }
    201 
    202 void CanvasContext::setSwapBehavior(SwapBehavior swapBehavior) {
    203     mSwapBehavior = swapBehavior;
    204 }
    205 
    206 void CanvasContext::initialize(Surface* surface) {
    207     setSurface(surface);
    208 }
    209 
    210 void CanvasContext::updateSurface(Surface* surface) {
    211     setSurface(surface);
    212 }
    213 
    214 bool CanvasContext::pauseSurface(Surface* surface) {
    215     return mRenderThread.removeFrameCallback(this);
    216 }
    217 
    218 void CanvasContext::setStopped(bool stopped) {
    219     if (mStopped != stopped) {
    220         mStopped = stopped;
    221         if (mStopped) {
    222             mRenderThread.removeFrameCallback(this);
    223             mRenderPipeline->onStop();
    224         } else if (mIsDirty && hasSurface()) {
    225             mRenderThread.postFrameCallback(this);
    226         }
    227     }
    228 }
    229 
    230 void CanvasContext::setup(float lightRadius,
    231         uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha) {
    232     mLightGeometry.radius = lightRadius;
    233     mLightInfo.ambientShadowAlpha = ambientShadowAlpha;
    234     mLightInfo.spotShadowAlpha = spotShadowAlpha;
    235 }
    236 
    237 void CanvasContext::setLightCenter(const Vector3& lightCenter) {
    238     mLightGeometry.center = lightCenter;
    239 }
    240 
    241 void CanvasContext::setOpaque(bool opaque) {
    242     mOpaque = opaque;
    243 }
    244 
    245 void CanvasContext::setWideGamut(bool wideGamut) {
    246     mWideColorGamut = wideGamut;
    247 }
    248 
    249 bool CanvasContext::makeCurrent() {
    250     if (mStopped) return false;
    251 
    252     auto result = mRenderPipeline->makeCurrent();
    253     switch (result) {
    254         case MakeCurrentResult::AlreadyCurrent:
    255             return true;
    256         case MakeCurrentResult::Failed:
    257             mHaveNewSurface = true;
    258             setSurface(nullptr);
    259             return false;
    260         case MakeCurrentResult::Succeeded:
    261             mHaveNewSurface = true;
    262             return true;
    263         default:
    264             LOG_ALWAYS_FATAL("unexpected result %d from IRenderPipeline::makeCurrent",
    265                     (int32_t) result);
    266     }
    267 
    268     return true;
    269 }
    270 
    271 static bool wasSkipped(FrameInfo* info) {
    272     return info && ((*info)[FrameInfoIndex::Flags] & FrameInfoFlags::SkippedFrame);
    273 }
    274 
    275 bool CanvasContext::isSwapChainStuffed() {
    276     static const auto SLOW_THRESHOLD = 6_ms;
    277 
    278     if (mSwapHistory.size() != mSwapHistory.capacity()) {
    279         // We want at least 3 frames of history before attempting to
    280         // guess if the queue is stuffed
    281         return false;
    282     }
    283     nsecs_t frameInterval = mRenderThread.timeLord().frameIntervalNanos();
    284     auto& swapA = mSwapHistory[0];
    285 
    286     // Was there a happy queue & dequeue time? If so, don't
    287     // consider it stuffed
    288     if (swapA.dequeueDuration < SLOW_THRESHOLD
    289             && swapA.queueDuration < SLOW_THRESHOLD) {
    290         return false;
    291     }
    292 
    293     for (size_t i = 1; i < mSwapHistory.size(); i++) {
    294         auto& swapB = mSwapHistory[i];
    295 
    296         // If there's a multi-frameInterval gap we effectively already dropped a frame,
    297         // so consider the queue healthy.
    298         if (swapA.swapCompletedTime - swapB.swapCompletedTime > frameInterval * 3) {
    299             return false;
    300         }
    301 
    302         // Was there a happy queue & dequeue time? If so, don't
    303         // consider it stuffed
    304         if (swapB.dequeueDuration < SLOW_THRESHOLD
    305                 && swapB.queueDuration < SLOW_THRESHOLD) {
    306             return false;
    307         }
    308 
    309         swapA = swapB;
    310     }
    311 
    312     // All signs point to a stuffed swap chain
    313     ATRACE_NAME("swap chain stuffed");
    314     return true;
    315 }
    316 
    317 void CanvasContext::prepareTree(TreeInfo& info, int64_t* uiFrameInfo,
    318         int64_t syncQueued, RenderNode* target) {
    319     mRenderThread.removeFrameCallback(this);
    320 
    321     // If the previous frame was dropped we don't need to hold onto it, so
    322     // just keep using the previous frame's structure instead
    323     if (!wasSkipped(mCurrentFrameInfo)) {
    324         mCurrentFrameInfo = mJankTracker.startFrame();
    325     }
    326     mCurrentFrameInfo->importUiThreadInfo(uiFrameInfo);
    327     mCurrentFrameInfo->set(FrameInfoIndex::SyncQueued) = syncQueued;
    328     mCurrentFrameInfo->markSyncStart();
    329 
    330     info.damageAccumulator = &mDamageAccumulator;
    331     info.layerUpdateQueue = &mLayerUpdateQueue;
    332 
    333     mAnimationContext->startFrame(info.mode);
    334     for (const sp<RenderNode>& node : mRenderNodes) {
    335         // Only the primary target node will be drawn full - all other nodes would get drawn in
    336         // real time mode. In case of a window, the primary node is the window content and the other
    337         // node(s) are non client / filler nodes.
    338         info.mode = (node.get() == target ? TreeInfo::MODE_FULL : TreeInfo::MODE_RT_ONLY);
    339         node->prepareTree(info);
    340         GL_CHECKPOINT(MODERATE);
    341     }
    342     mAnimationContext->runRemainingAnimations(info);
    343     GL_CHECKPOINT(MODERATE);
    344 
    345     freePrefetchedLayers();
    346     GL_CHECKPOINT(MODERATE);
    347 
    348     mIsDirty = true;
    349 
    350     if (CC_UNLIKELY(!mNativeSurface.get())) {
    351         mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
    352         info.out.canDrawThisFrame = false;
    353         return;
    354     }
    355 
    356     if (CC_LIKELY(mSwapHistory.size() && !Properties::forceDrawFrame)) {
    357         nsecs_t latestVsync = mRenderThread.timeLord().latestVsync();
    358         SwapHistory& lastSwap = mSwapHistory.back();
    359         nsecs_t vsyncDelta = std::abs(lastSwap.vsyncTime - latestVsync);
    360         // The slight fudge-factor is to deal with cases where
    361         // the vsync was estimated due to being slow handling the signal.
    362         // See the logic in TimeLord#computeFrameTimeNanos or in
    363         // Choreographer.java for details on when this happens
    364         if (vsyncDelta < 2_ms) {
    365             // Already drew for this vsync pulse, UI draw request missed
    366             // the deadline for RT animations
    367             info.out.canDrawThisFrame = false;
    368         } else if (vsyncDelta >= mRenderThread.timeLord().frameIntervalNanos() * 3
    369                 || (latestVsync - mLastDropVsync) < 500_ms) {
    370             // It's been several frame intervals, assume the buffer queue is fine
    371             // or the last drop was too recent
    372             info.out.canDrawThisFrame = true;
    373         } else {
    374             info.out.canDrawThisFrame = !isSwapChainStuffed();
    375             if (!info.out.canDrawThisFrame) {
    376                 // dropping frame
    377                 mLastDropVsync = mRenderThread.timeLord().latestVsync();
    378             }
    379         }
    380     } else {
    381         info.out.canDrawThisFrame = true;
    382     }
    383 
    384     if (!info.out.canDrawThisFrame) {
    385         mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
    386     }
    387 
    388     if (info.out.hasAnimations || !info.out.canDrawThisFrame) {
    389         if (!info.out.requiresUiRedraw) {
    390             // If animationsNeedsRedraw is set don't bother posting for an RT anim
    391             // as we will just end up fighting the UI thread.
    392             mRenderThread.postFrameCallback(this);
    393         }
    394     }
    395 }
    396 
    397 void CanvasContext::stopDrawing() {
    398     mRenderThread.removeFrameCallback(this);
    399     mAnimationContext->pauseAnimators();
    400 }
    401 
    402 void CanvasContext::notifyFramePending() {
    403     ATRACE_CALL();
    404     mRenderThread.pushBackFrameCallback(this);
    405 }
    406 
    407 void CanvasContext::draw() {
    408     SkRect dirty;
    409     mDamageAccumulator.finish(&dirty);
    410 
    411     // TODO: Re-enable after figuring out cause of b/22592975
    412 //    if (dirty.isEmpty() && Properties::skipEmptyFrames) {
    413 //        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
    414 //        return;
    415 //    }
    416 
    417     mCurrentFrameInfo->markIssueDrawCommandsStart();
    418 
    419     Frame frame = mRenderPipeline->getFrame();
    420 
    421     SkRect windowDirty = computeDirtyRect(frame, &dirty);
    422 
    423     bool drew = mRenderPipeline->draw(frame, windowDirty, dirty, mLightGeometry, &mLayerUpdateQueue,
    424             mContentDrawBounds, mOpaque, mWideColorGamut, mLightInfo, mRenderNodes, &(profiler()));
    425 
    426     waitOnFences();
    427 
    428     bool requireSwap = false;
    429     bool didSwap = mRenderPipeline->swapBuffers(frame, drew, windowDirty, mCurrentFrameInfo,
    430             &requireSwap);
    431 
    432     mIsDirty = false;
    433 
    434     if (requireSwap) {
    435         if (!didSwap) { //some error happened
    436             setSurface(nullptr);
    437         }
    438         SwapHistory& swap = mSwapHistory.next();
    439         swap.damage = windowDirty;
    440         swap.swapCompletedTime = systemTime(CLOCK_MONOTONIC);
    441         swap.vsyncTime = mRenderThread.timeLord().latestVsync();
    442         if (mNativeSurface.get()) {
    443             int durationUs;
    444             nsecs_t dequeueStart = mNativeSurface->getLastDequeueStartTime();
    445             if (dequeueStart < mCurrentFrameInfo->get(FrameInfoIndex::SyncStart)) {
    446                 // Ignoring dequeue duration as it happened prior to frame render start
    447                 // and thus is not part of the frame.
    448                 swap.dequeueDuration = 0;
    449             } else {
    450                 mNativeSurface->query(NATIVE_WINDOW_LAST_DEQUEUE_DURATION, &durationUs);
    451                 swap.dequeueDuration = us2ns(durationUs);
    452             }
    453             mNativeSurface->query(NATIVE_WINDOW_LAST_QUEUE_DURATION, &durationUs);
    454             swap.queueDuration = us2ns(durationUs);
    455         } else {
    456             swap.dequeueDuration = 0;
    457             swap.queueDuration = 0;
    458         }
    459         mCurrentFrameInfo->set(FrameInfoIndex::DequeueBufferDuration)
    460                 = swap.dequeueDuration;
    461         mCurrentFrameInfo->set(FrameInfoIndex::QueueBufferDuration)
    462                 = swap.queueDuration;
    463         mHaveNewSurface = false;
    464         mFrameNumber = -1;
    465     } else {
    466         mCurrentFrameInfo->set(FrameInfoIndex::DequeueBufferDuration) = 0;
    467         mCurrentFrameInfo->set(FrameInfoIndex::QueueBufferDuration) = 0;
    468     }
    469 
    470     // TODO: Use a fence for real completion?
    471     mCurrentFrameInfo->markFrameCompleted();
    472 
    473 #if LOG_FRAMETIME_MMA
    474     float thisFrame = mCurrentFrameInfo->duration(
    475             FrameInfoIndex::IssueDrawCommandsStart,
    476             FrameInfoIndex::FrameCompleted) / NANOS_PER_MILLIS_F;
    477     if (sFrameCount) {
    478         sBenchMma = ((9 * sBenchMma) + thisFrame) / 10;
    479     } else {
    480         sBenchMma = thisFrame;
    481     }
    482     if (++sFrameCount == 10) {
    483         sFrameCount = 1;
    484         ALOGD("Average frame time: %.4f", sBenchMma);
    485     }
    486 #endif
    487 
    488     mJankTracker.finishFrame(*mCurrentFrameInfo);
    489     if (CC_UNLIKELY(mFrameMetricsReporter.get() != nullptr)) {
    490         mFrameMetricsReporter->reportFrameMetrics(mCurrentFrameInfo->data());
    491     }
    492 
    493     GpuMemoryTracker::onFrameCompleted();
    494 #ifdef BUGREPORT_FONT_CACHE_USAGE
    495     auto renderType = Properties::getRenderPipelineType();
    496     if (RenderPipelineType::OpenGL == renderType) {
    497         Caches& caches = Caches::getInstance();
    498         caches.fontRenderer.getFontRenderer().historyTracker().frameCompleted();
    499     }
    500 #endif
    501 
    502 }
    503 
    504 // Called by choreographer to do an RT-driven animation
    505 void CanvasContext::doFrame() {
    506     if (!mRenderPipeline->isSurfaceReady()) return;
    507     prepareAndDraw(nullptr);
    508 }
    509 
    510 void CanvasContext::prepareAndDraw(RenderNode* node) {
    511     ATRACE_CALL();
    512 
    513     nsecs_t vsync = mRenderThread.timeLord().computeFrameTimeNanos();
    514     int64_t frameInfo[UI_THREAD_FRAME_INFO_SIZE];
    515     UiFrameInfoBuilder(frameInfo)
    516         .addFlag(FrameInfoFlags::RTAnimation)
    517         .setVsync(vsync, vsync);
    518 
    519     TreeInfo info(TreeInfo::MODE_RT_ONLY, *this);
    520     prepareTree(info, frameInfo, systemTime(CLOCK_MONOTONIC), node);
    521     if (info.out.canDrawThisFrame) {
    522         draw();
    523     } else {
    524         // wait on fences so tasks don't overlap next frame
    525         waitOnFences();
    526     }
    527 }
    528 
    529 void CanvasContext::markLayerInUse(RenderNode* node) {
    530     if (mPrefetchedLayers.erase(node)) {
    531         node->decStrong(nullptr);
    532     }
    533 }
    534 
    535 void CanvasContext::freePrefetchedLayers() {
    536     if (mPrefetchedLayers.size()) {
    537         for (auto& node : mPrefetchedLayers) {
    538             ALOGW("Incorrectly called buildLayer on View: %s, destroying layer...",
    539                     node->getName());
    540             node->destroyLayers();
    541             node->decStrong(nullptr);
    542         }
    543         mPrefetchedLayers.clear();
    544     }
    545 }
    546 
    547 void CanvasContext::buildLayer(RenderNode* node) {
    548     ATRACE_CALL();
    549     if (!mRenderPipeline->isContextReady()) return;
    550 
    551     // buildLayer() will leave the tree in an unknown state, so we must stop drawing
    552     stopDrawing();
    553 
    554     TreeInfo info(TreeInfo::MODE_FULL, *this);
    555     info.damageAccumulator = &mDamageAccumulator;
    556     info.layerUpdateQueue = &mLayerUpdateQueue;
    557     info.runAnimations = false;
    558     node->prepareTree(info);
    559     SkRect ignore;
    560     mDamageAccumulator.finish(&ignore);
    561     // Tickle the GENERIC property on node to mark it as dirty for damaging
    562     // purposes when the frame is actually drawn
    563     node->setPropertyFieldsDirty(RenderNode::GENERIC);
    564 
    565     mRenderPipeline->renderLayers(mLightGeometry, &mLayerUpdateQueue,
    566             mOpaque, mWideColorGamut, mLightInfo);
    567 
    568     node->incStrong(nullptr);
    569     mPrefetchedLayers.insert(node);
    570 }
    571 
    572 bool CanvasContext::copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap) {
    573     return mRenderPipeline->copyLayerInto(layer, bitmap);
    574 }
    575 
    576 void CanvasContext::destroyHardwareResources() {
    577     stopDrawing();
    578     if (mRenderPipeline->isContextReady()) {
    579         freePrefetchedLayers();
    580         for (const sp<RenderNode>& node : mRenderNodes) {
    581             node->destroyHardwareResources();
    582         }
    583         mRenderPipeline->onDestroyHardwareResources();
    584     }
    585 }
    586 
    587 void CanvasContext::trimMemory(RenderThread& thread, int level) {
    588     auto renderType = Properties::getRenderPipelineType();
    589     switch (renderType) {
    590         case RenderPipelineType::OpenGL: {
    591             // No context means nothing to free
    592             if (!thread.eglManager().hasEglContext()) return;
    593             ATRACE_CALL();
    594             if (level >= TRIM_MEMORY_COMPLETE) {
    595                 thread.renderState().flush(Caches::FlushMode::Full);
    596                 thread.eglManager().destroy();
    597             } else if (level >= TRIM_MEMORY_UI_HIDDEN) {
    598                 thread.renderState().flush(Caches::FlushMode::Moderate);
    599             }
    600             break;
    601         }
    602         case RenderPipelineType::SkiaGL:
    603         case RenderPipelineType::SkiaVulkan: {
    604             // No context means nothing to free
    605             if (!thread.getGrContext()) return;
    606             ATRACE_CALL();
    607             if (level >= TRIM_MEMORY_COMPLETE) {
    608                 thread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::Complete);
    609                 thread.eglManager().destroy();
    610                 thread.vulkanManager().destroy();
    611             } else if (level >= TRIM_MEMORY_UI_HIDDEN) {
    612                 thread.cacheManager().trimMemory(CacheManager::TrimMemoryMode::UiHidden);
    613             }
    614             break;
    615         }
    616         default:
    617             LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
    618             break;
    619     }
    620 }
    621 
    622 DeferredLayerUpdater* CanvasContext::createTextureLayer() {
    623     return mRenderPipeline->createTextureLayer();
    624 }
    625 
    626 void CanvasContext::dumpFrames(int fd) {
    627     mJankTracker.dumpStats(fd);
    628     mJankTracker.dumpFrames(fd);
    629 }
    630 
    631 void CanvasContext::resetFrameStats() {
    632     mJankTracker.reset();
    633 }
    634 
    635 void CanvasContext::setName(const std::string&& name) {
    636     mJankTracker.setDescription(JankTrackerType::Window, std::move(name));
    637 }
    638 
    639 void CanvasContext::serializeDisplayListTree() {
    640 #if ENABLE_RENDERNODE_SERIALIZATION
    641     using namespace google::protobuf::io;
    642     char package[128];
    643     // Check whether tracing is enabled for this process.
    644     FILE * file = fopen("/proc/self/cmdline", "r");
    645     if (file) {
    646         if (!fgets(package, 128, file)) {
    647             ALOGE("Error reading cmdline: %s (%d)", strerror(errno), errno);
    648             fclose(file);
    649             return;
    650         }
    651         fclose(file);
    652     } else {
    653         ALOGE("Error opening /proc/self/cmdline: %s (%d)", strerror(errno),
    654                 errno);
    655         return;
    656     }
    657     char path[1024];
    658     snprintf(path, 1024, "/data/data/%s/cache/rendertree_dump", package);
    659     int fd = open(path, O_CREAT | O_WRONLY, S_IRWXU | S_IRGRP | S_IROTH);
    660     if (fd == -1) {
    661         ALOGD("Failed to open '%s'", path);
    662         return;
    663     }
    664     proto::RenderNode tree;
    665     // TODO: Streaming writes?
    666     mRootRenderNode->copyTo(&tree);
    667     std::string data = tree.SerializeAsString();
    668     write(fd, data.c_str(), data.length());
    669     close(fd);
    670 #endif
    671 }
    672 
    673 void CanvasContext::waitOnFences() {
    674     if (mFrameFences.size()) {
    675         ATRACE_CALL();
    676         for (auto& fence : mFrameFences) {
    677             fence->getResult();
    678         }
    679         mFrameFences.clear();
    680     }
    681 }
    682 
    683 class CanvasContext::FuncTaskProcessor : public TaskProcessor<bool> {
    684 public:
    685     explicit FuncTaskProcessor(TaskManager* taskManager)
    686             : TaskProcessor<bool>(taskManager) {}
    687 
    688     virtual void onProcess(const sp<Task<bool> >& task) override {
    689         FuncTask* t = static_cast<FuncTask*>(task.get());
    690         t->func();
    691         task->setResult(true);
    692     }
    693 };
    694 
    695 void CanvasContext::enqueueFrameWork(std::function<void()>&& func) {
    696     if (!mFrameWorkProcessor.get()) {
    697         mFrameWorkProcessor = new FuncTaskProcessor(mRenderPipeline->getTaskManager());
    698     }
    699     sp<FuncTask> task(new FuncTask());
    700     task->func = func;
    701     mFrameFences.push_back(task);
    702     mFrameWorkProcessor->add(task);
    703 }
    704 
    705 int64_t CanvasContext::getFrameNumber() {
    706     // mFrameNumber is reset to -1 when the surface changes or we swap buffers
    707     if (mFrameNumber == -1 && mNativeSurface.get()) {
    708         mFrameNumber = static_cast<int64_t>(mNativeSurface->getNextFrameNumber());
    709     }
    710     return mFrameNumber;
    711 }
    712 
    713 SkRect CanvasContext::computeDirtyRect(const Frame& frame, SkRect* dirty) {
    714     if (frame.width() != mLastFrameWidth || frame.height() != mLastFrameHeight) {
    715         // can't rely on prior content of window if viewport size changes
    716         dirty->setEmpty();
    717         mLastFrameWidth = frame.width();
    718         mLastFrameHeight = frame.height();
    719     } else if (mHaveNewSurface || frame.bufferAge() == 0) {
    720         // New surface needs a full draw
    721         dirty->setEmpty();
    722     } else {
    723         if (!dirty->isEmpty() && !dirty->intersect(0, 0, frame.width(), frame.height())) {
    724             ALOGW("Dirty " RECT_STRING " doesn't intersect with 0 0 %d %d ?",
    725                     SK_RECT_ARGS(*dirty), frame.width(), frame.height());
    726             dirty->setEmpty();
    727         }
    728         profiler().unionDirty(dirty);
    729     }
    730 
    731     if (dirty->isEmpty()) {
    732         dirty->set(0, 0, frame.width(), frame.height());
    733     }
    734 
    735     // At this point dirty is the area of the window to update. However,
    736     // the area of the frame we need to repaint is potentially different, so
    737     // stash the screen area for later
    738     SkRect windowDirty(*dirty);
    739 
    740     // If the buffer age is 0 we do a full-screen repaint (handled above)
    741     // If the buffer age is 1 the buffer contents are the same as they were
    742     // last frame so there's nothing to union() against
    743     // Therefore we only care about the > 1 case.
    744     if (frame.bufferAge() > 1) {
    745         if (frame.bufferAge() > (int) mSwapHistory.size()) {
    746             // We don't have enough history to handle this old of a buffer
    747             // Just do a full-draw
    748             dirty->set(0, 0, frame.width(), frame.height());
    749         } else {
    750             // At this point we haven't yet added the latest frame
    751             // to the damage history (happens below)
    752             // So we need to damage
    753             for (int i = mSwapHistory.size() - 1;
    754                     i > ((int) mSwapHistory.size()) - frame.bufferAge(); i--) {
    755                 dirty->join(mSwapHistory[i].damage);
    756             }
    757         }
    758     }
    759 
    760     return windowDirty;
    761 }
    762 
    763 } /* namespace renderthread */
    764 } /* namespace uirenderer */
    765 } /* namespace android */
    766