CanvasContext.cpp revision daf7229047c44947b9b02ee187fe5b13f30ebd4b 
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 "DeferredLayerUpdater.h"
23#include "EglManager.h"
24#include "LayerUpdateQueue.h"
25#include "Properties.h"
26#include "Readback.h"
27#include "RenderThread.h"
28#include "hwui/Canvas.h"
29#include "renderstate/RenderState.h"
30#include "renderstate/Stencil.h"
31#include "protos/hwui.pb.h"
32#include "OpenGLPipeline.h"
33#include "utils/GLUtils.h"
34#include "utils/TimeUtils.h"
35
36#include <cutils/properties.h>
37#include <google/protobuf/io/zero_copy_stream_impl.h>
38#include <private/hwui/DrawGlInfo.h>
39#include <strings.h>
40
41#include <algorithm>
42#include <fcntl.h>
43#include <sys/stat.h>
44
45#include <cstdlib>
46
47#define TRIM_MEMORY_COMPLETE 80
48#define TRIM_MEMORY_UI_HIDDEN 20
49
50#define ENABLE_RENDERNODE_SERIALIZATION false
51
52#define LOG_FRAMETIME_MMA 0
53
54#if LOG_FRAMETIME_MMA
55static float sBenchMma = 0;
56static int sFrameCount = 0;
57static const float NANOS_PER_MILLIS_F = 1000000.0f;
58#endif
59
60namespace android {
61namespace uirenderer {
62namespace renderthread {
63
64CanvasContext* CanvasContext::create(RenderThread& thread,
65        bool translucent, RenderNode* rootRenderNode, IContextFactory* contextFactory) {
66
67    auto renderType = Properties::getRenderPipelineType();
68
69    switch (renderType) {
70        case RenderPipelineType::OpenGL:
71            return new CanvasContext(thread, translucent, rootRenderNode, contextFactory,
72                    std::make_unique<OpenGLPipeline>(thread));
73        case RenderPipelineType::SkiaGL:
74            //TODO: implement SKIA GL
75            LOG_ALWAYS_FATAL("skiaGL canvas type not implemented.");
76            break;
77        case RenderPipelineType::SkiaVulkan:
78            //TODO: implement Vulkan
79            LOG_ALWAYS_FATAL("Vulkan canvas type not implemented.");
80            break;
81        default:
82            LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
83            break;
84    }
85    return nullptr;
86}
87
88void CanvasContext::destroyLayer(RenderNode* node) {
89    auto renderType = Properties::getRenderPipelineType();
90    switch (renderType) {
91        case RenderPipelineType::OpenGL:
92            OpenGLPipeline::destroyLayer(node);
93            break;
94        default:
95            LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
96            break;
97    }
98}
99
100void CanvasContext::invokeFunctor(const RenderThread& thread, Functor* functor) {
101    ATRACE_CALL();
102    auto renderType = Properties::getRenderPipelineType();
103    switch (renderType) {
104        case RenderPipelineType::OpenGL:
105            OpenGLPipeline::invokeFunctor(thread, functor);
106            break;
107        default:
108            LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
109            break;
110    }
111}
112
113void CanvasContext::prepareToDraw(const RenderThread& thread, Bitmap* bitmap) {
114    auto renderType = Properties::getRenderPipelineType();
115    switch (renderType) {
116        case RenderPipelineType::OpenGL:
117            OpenGLPipeline::prepareToDraw(thread, bitmap);
118            break;
119        default:
120            LOG_ALWAYS_FATAL("canvas context type %d not supported", (int32_t) renderType);
121            break;
122    }
123}
124
125CanvasContext::CanvasContext(RenderThread& thread, bool translucent,
126        RenderNode* rootRenderNode, IContextFactory* contextFactory,
127        std::unique_ptr<IRenderPipeline> renderPipeline)
128        : mRenderThread(thread)
129        , mOpaque(!translucent)
130        , mAnimationContext(contextFactory->createAnimationContext(mRenderThread.timeLord()))
131        , mJankTracker(thread.mainDisplayInfo())
132        , mProfiler(mFrames)
133        , mContentDrawBounds(0, 0, 0, 0)
134        , mRenderPipeline(std::move(renderPipeline)) {
135    mRenderNodes.emplace_back(rootRenderNode);
136    mRenderThread.renderState().registerCanvasContext(this);
137    mProfiler.setDensity(mRenderThread.mainDisplayInfo().density);
138}
139
140CanvasContext::~CanvasContext() {
141    destroy(nullptr);
142    mRenderThread.renderState().unregisterCanvasContext(this);
143}
144
145void CanvasContext::destroy(TreeObserver* observer) {
146    stopDrawing();
147    setSurface(nullptr);
148    freePrefetchedLayers(observer);
149    destroyHardwareResources(observer);
150    mAnimationContext->destroy();
151}
152
153void CanvasContext::setSurface(Surface* surface) {
154    ATRACE_CALL();
155
156    mNativeSurface = surface;
157
158    bool hasSurface = mRenderPipeline->setSurface(surface, mSwapBehavior);
159
160    mFrameNumber = -1;
161
162    if (hasSurface) {
163         mHaveNewSurface = true;
164         mSwapHistory.clear();
165    } else {
166         mRenderThread.removeFrameCallback(this);
167    }
168}
169
170void CanvasContext::setSwapBehavior(SwapBehavior swapBehavior) {
171    mSwapBehavior = swapBehavior;
172}
173
174void CanvasContext::initialize(Surface* surface) {
175    setSurface(surface);
176}
177
178void CanvasContext::updateSurface(Surface* surface) {
179    setSurface(surface);
180}
181
182bool CanvasContext::pauseSurface(Surface* surface) {
183    return mRenderThread.removeFrameCallback(this);
184}
185
186void CanvasContext::setStopped(bool stopped) {
187    if (mStopped != stopped) {
188        mStopped = stopped;
189        if (mStopped) {
190            mRenderThread.removeFrameCallback(this);
191            mRenderPipeline->onStop();
192        } else if (mIsDirty && hasSurface()) {
193            mRenderThread.postFrameCallback(this);
194        }
195    }
196}
197
198void CanvasContext::setup(float lightRadius,
199        uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha) {
200    mLightGeometry.radius = lightRadius;
201    mLightInfo.ambientShadowAlpha = ambientShadowAlpha;
202    mLightInfo.spotShadowAlpha = spotShadowAlpha;
203}
204
205void CanvasContext::setLightCenter(const Vector3& lightCenter) {
206    mLightGeometry.center = lightCenter;
207}
208
209void CanvasContext::setOpaque(bool opaque) {
210    mOpaque = opaque;
211}
212
213bool CanvasContext::makeCurrent() {
214    if (mStopped) return false;
215
216    auto result = mRenderPipeline->makeCurrent();
217    switch (result) {
218        case MakeCurrentResult::AlreadyCurrent:
219            return true;
220        case MakeCurrentResult::Failed:
221            mHaveNewSurface = true;
222            setSurface(nullptr);
223            return false;
224        case MakeCurrentResult::Succeeded:
225            mHaveNewSurface = true;
226            return true;
227        default:
228            LOG_ALWAYS_FATAL("unexpected result %d from IRenderPipeline::makeCurrent",
229                    (int32_t) result);
230    }
231
232    return true;
233}
234
235static bool wasSkipped(FrameInfo* info) {
236    return info && ((*info)[FrameInfoIndex::Flags] & FrameInfoFlags::SkippedFrame);
237}
238
239bool CanvasContext::isSwapChainStuffed() {
240    static const auto SLOW_THRESHOLD = 6_ms;
241
242    if (mSwapHistory.size() != mSwapHistory.capacity()) {
243        // We want at least 3 frames of history before attempting to
244        // guess if the queue is stuffed
245        return false;
246    }
247    nsecs_t frameInterval = mRenderThread.timeLord().frameIntervalNanos();
248    auto& swapA = mSwapHistory[0];
249
250    // Was there a happy queue & dequeue time? If so, don't
251    // consider it stuffed
252    if (swapA.dequeueDuration < SLOW_THRESHOLD
253            && swapA.queueDuration < SLOW_THRESHOLD) {
254        return false;
255    }
256
257    for (size_t i = 1; i < mSwapHistory.size(); i++) {
258        auto& swapB = mSwapHistory[i];
259
260        // If there's a multi-frameInterval gap we effectively already dropped a frame,
261        // so consider the queue healthy.
262        if (swapA.swapCompletedTime - swapB.swapCompletedTime > frameInterval * 3) {
263            return false;
264        }
265
266        // Was there a happy queue & dequeue time? If so, don't
267        // consider it stuffed
268        if (swapB.dequeueDuration < SLOW_THRESHOLD
269                && swapB.queueDuration < SLOW_THRESHOLD) {
270            return false;
271        }
272
273        swapA = swapB;
274    }
275
276    // All signs point to a stuffed swap chain
277    ATRACE_NAME("swap chain stuffed");
278    return true;
279}
280
281void CanvasContext::prepareTree(TreeInfo& info, int64_t* uiFrameInfo,
282        int64_t syncQueued, RenderNode* target) {
283    mRenderThread.removeFrameCallback(this);
284
285    // If the previous frame was dropped we don't need to hold onto it, so
286    // just keep using the previous frame's structure instead
287    if (!wasSkipped(mCurrentFrameInfo)) {
288        mCurrentFrameInfo = &mFrames.next();
289    }
290    mCurrentFrameInfo->importUiThreadInfo(uiFrameInfo);
291    mCurrentFrameInfo->set(FrameInfoIndex::SyncQueued) = syncQueued;
292    mCurrentFrameInfo->markSyncStart();
293
294    info.damageAccumulator = &mDamageAccumulator;
295    info.layerUpdateQueue = &mLayerUpdateQueue;
296
297    mAnimationContext->startFrame(info.mode);
298    for (const sp<RenderNode>& node : mRenderNodes) {
299        // Only the primary target node will be drawn full - all other nodes would get drawn in
300        // real time mode. In case of a window, the primary node is the window content and the other
301        // node(s) are non client / filler nodes.
302        info.mode = (node.get() == target ? TreeInfo::MODE_FULL : TreeInfo::MODE_RT_ONLY);
303        node->prepareTree(info);
304        GL_CHECKPOINT(MODERATE);
305    }
306    mAnimationContext->runRemainingAnimations(info);
307    GL_CHECKPOINT(MODERATE);
308
309    freePrefetchedLayers(info.observer);
310    GL_CHECKPOINT(MODERATE);
311
312    mIsDirty = true;
313
314    if (CC_UNLIKELY(!mNativeSurface.get())) {
315        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
316        info.out.canDrawThisFrame = false;
317        return;
318    }
319
320    if (CC_LIKELY(mSwapHistory.size() && !Properties::forceDrawFrame)) {
321        nsecs_t latestVsync = mRenderThread.timeLord().latestVsync();
322        SwapHistory& lastSwap = mSwapHistory.back();
323        nsecs_t vsyncDelta = std::abs(lastSwap.vsyncTime - latestVsync);
324        // The slight fudge-factor is to deal with cases where
325        // the vsync was estimated due to being slow handling the signal.
326        // See the logic in TimeLord#computeFrameTimeNanos or in
327        // Choreographer.java for details on when this happens
328        if (vsyncDelta < 2_ms) {
329            // Already drew for this vsync pulse, UI draw request missed
330            // the deadline for RT animations
331            info.out.canDrawThisFrame = false;
332        } else if (vsyncDelta >= mRenderThread.timeLord().frameIntervalNanos() * 3
333                || (latestVsync - mLastDropVsync) < 500_ms) {
334            // It's been several frame intervals, assume the buffer queue is fine
335            // or the last drop was too recent
336            info.out.canDrawThisFrame = true;
337        } else {
338            info.out.canDrawThisFrame = !isSwapChainStuffed();
339            if (!info.out.canDrawThisFrame) {
340                // dropping frame
341                mLastDropVsync = mRenderThread.timeLord().latestVsync();
342            }
343        }
344    } else {
345        info.out.canDrawThisFrame = true;
346    }
347
348    if (!info.out.canDrawThisFrame) {
349        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
350    }
351
352    if (info.out.hasAnimations || !info.out.canDrawThisFrame) {
353        if (!info.out.requiresUiRedraw) {
354            // If animationsNeedsRedraw is set don't bother posting for an RT anim
355            // as we will just end up fighting the UI thread.
356            mRenderThread.postFrameCallback(this);
357        }
358    }
359}
360
361void CanvasContext::stopDrawing() {
362    mRenderThread.removeFrameCallback(this);
363    mAnimationContext->pauseAnimators();
364}
365
366void CanvasContext::notifyFramePending() {
367    ATRACE_CALL();
368    mRenderThread.pushBackFrameCallback(this);
369}
370
371void CanvasContext::draw() {
372    SkRect dirty;
373    mDamageAccumulator.finish(&dirty);
374
375    // TODO: Re-enable after figuring out cause of b/22592975
376//    if (dirty.isEmpty() && Properties::skipEmptyFrames) {
377//        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
378//        return;
379//    }
380
381    mCurrentFrameInfo->markIssueDrawCommandsStart();
382
383    Frame frame = mRenderPipeline->getFrame();
384
385    SkRect windowDirty = computeDirtyRect(frame, &dirty);
386
387    bool drew = mRenderPipeline->draw(frame, windowDirty, dirty, mLightGeometry, &mLayerUpdateQueue,
388            mContentDrawBounds, mOpaque, mLightInfo, mRenderNodes, &(profiler()));
389
390    waitOnFences();
391
392    bool requireSwap = false;
393    bool didSwap = mRenderPipeline->swapBuffers(frame, drew, windowDirty, mCurrentFrameInfo,
394            &requireSwap);
395
396    mIsDirty = false;
397
398    if (requireSwap) {
399        if (!didSwap) { //some error happened
400            setSurface(nullptr);
401        }
402        SwapHistory& swap = mSwapHistory.next();
403        swap.damage = windowDirty;
404        swap.swapCompletedTime = systemTime(CLOCK_MONOTONIC);
405        swap.vsyncTime = mRenderThread.timeLord().latestVsync();
406        if (mNativeSurface.get()) {
407            int durationUs;
408            mNativeSurface->query(NATIVE_WINDOW_LAST_DEQUEUE_DURATION, &durationUs);
409            swap.dequeueDuration = us2ns(durationUs);
410            mNativeSurface->query(NATIVE_WINDOW_LAST_QUEUE_DURATION, &durationUs);
411            swap.queueDuration = us2ns(durationUs);
412        } else {
413            swap.dequeueDuration = 0;
414            swap.queueDuration = 0;
415        }
416        mCurrentFrameInfo->set(FrameInfoIndex::DequeueBufferDuration)
417                = swap.dequeueDuration;
418        mCurrentFrameInfo->set(FrameInfoIndex::QueueBufferDuration)
419                = swap.queueDuration;
420        mHaveNewSurface = false;
421        mFrameNumber = -1;
422    } else {
423        mCurrentFrameInfo->set(FrameInfoIndex::DequeueBufferDuration) = 0;
424        mCurrentFrameInfo->set(FrameInfoIndex::QueueBufferDuration) = 0;
425    }
426
427    // TODO: Use a fence for real completion?
428    mCurrentFrameInfo->markFrameCompleted();
429
430#if LOG_FRAMETIME_MMA
431    float thisFrame = mCurrentFrameInfo->duration(
432            FrameInfoIndex::IssueDrawCommandsStart,
433            FrameInfoIndex::FrameCompleted) / NANOS_PER_MILLIS_F;
434    if (sFrameCount) {
435        sBenchMma = ((9 * sBenchMma) + thisFrame) / 10;
436    } else {
437        sBenchMma = thisFrame;
438    }
439    if (++sFrameCount == 10) {
440        sFrameCount = 1;
441        ALOGD("Average frame time: %.4f", sBenchMma);
442    }
443#endif
444
445    mJankTracker.addFrame(*mCurrentFrameInfo);
446    mRenderThread.jankTracker().addFrame(*mCurrentFrameInfo);
447    if (CC_UNLIKELY(mFrameMetricsReporter.get() != nullptr)) {
448        mFrameMetricsReporter->reportFrameMetrics(mCurrentFrameInfo->data());
449    }
450
451    GpuMemoryTracker::onFrameCompleted();
452#ifdef BUGREPORT_FONT_CACHE_USAGE
453    auto renderType = Properties::getRenderPipelineType();
454    if (RenderPipelineType::OpenGL == renderType) {
455        Caches& caches = Caches::getInstance();
456        caches.fontRenderer.getFontRenderer().historyTracker().frameCompleted();
457    }
458#endif
459
460}
461
462// Called by choreographer to do an RT-driven animation
463void CanvasContext::doFrame() {
464    if (!mRenderPipeline->isSurfaceReady()) return;
465    prepareAndDraw(nullptr);
466}
467
468void CanvasContext::prepareAndDraw(RenderNode* node) {
469    ATRACE_CALL();
470
471    nsecs_t vsync = mRenderThread.timeLord().computeFrameTimeNanos();
472    int64_t frameInfo[UI_THREAD_FRAME_INFO_SIZE];
473    UiFrameInfoBuilder(frameInfo)
474        .addFlag(FrameInfoFlags::RTAnimation)
475        .setVsync(vsync, vsync);
476
477    TreeInfo info(TreeInfo::MODE_RT_ONLY, *this);
478    prepareTree(info, frameInfo, systemTime(CLOCK_MONOTONIC), node);
479    if (info.out.canDrawThisFrame) {
480        draw();
481    } else {
482        // wait on fences so tasks don't overlap next frame
483        waitOnFences();
484    }
485}
486
487void CanvasContext::markLayerInUse(RenderNode* node) {
488    if (mPrefetchedLayers.erase(node)) {
489        node->decStrong(nullptr);
490    }
491}
492
493void CanvasContext::freePrefetchedLayers(TreeObserver* observer) {
494    if (mPrefetchedLayers.size()) {
495        for (auto& node : mPrefetchedLayers) {
496            ALOGW("Incorrectly called buildLayer on View: %s, destroying layer...",
497                    node->getName());
498            node->destroyHardwareResources(observer);
499            node->decStrong(observer);
500        }
501        mPrefetchedLayers.clear();
502    }
503}
504
505void CanvasContext::buildLayer(RenderNode* node, TreeObserver* observer) {
506    ATRACE_CALL();
507    if (!mRenderPipeline->isContextReady()) return;
508
509    // buildLayer() will leave the tree in an unknown state, so we must stop drawing
510    stopDrawing();
511
512    TreeInfo info(TreeInfo::MODE_FULL, *this);
513    info.damageAccumulator = &mDamageAccumulator;
514    info.observer = observer;
515    info.layerUpdateQueue = &mLayerUpdateQueue;
516    info.runAnimations = false;
517    node->prepareTree(info);
518    SkRect ignore;
519    mDamageAccumulator.finish(&ignore);
520    // Tickle the GENERIC property on node to mark it as dirty for damaging
521    // purposes when the frame is actually drawn
522    node->setPropertyFieldsDirty(RenderNode::GENERIC);
523
524    mRenderPipeline->renderLayers(mLightGeometry, &mLayerUpdateQueue, mOpaque, mLightInfo);
525
526    node->incStrong(nullptr);
527    mPrefetchedLayers.insert(node);
528}
529
530bool CanvasContext::copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap) {
531    return mRenderPipeline->copyLayerInto(layer, bitmap);
532}
533
534void CanvasContext::destroyHardwareResources(TreeObserver* observer) {
535    stopDrawing();
536    if (mRenderPipeline->isContextReady()) {
537        freePrefetchedLayers(observer);
538        for (const sp<RenderNode>& node : mRenderNodes) {
539            node->destroyHardwareResources(observer);
540        }
541        mRenderPipeline->onDestroyHardwareResources();
542    }
543}
544
545void CanvasContext::trimMemory(RenderThread& thread, int level) {
546    // No context means nothing to free
547    if (!thread.eglManager().hasEglContext()) return;
548
549    ATRACE_CALL();
550    if (level >= TRIM_MEMORY_COMPLETE) {
551        thread.renderState().flush(Caches::FlushMode::Full);
552        thread.eglManager().destroy();
553    } else if (level >= TRIM_MEMORY_UI_HIDDEN) {
554        thread.renderState().flush(Caches::FlushMode::Moderate);
555    }
556}
557
558DeferredLayerUpdater* CanvasContext::createTextureLayer() {
559    return mRenderPipeline->createTextureLayer();
560}
561
562void CanvasContext::dumpFrames(int fd) {
563    FILE* file = fdopen(fd, "a");
564    fprintf(file, "\n\n---PROFILEDATA---\n");
565    for (size_t i = 0; i < static_cast<size_t>(FrameInfoIndex::NumIndexes); i++) {
566        fprintf(file, "%s", FrameInfoNames[i].c_str());
567        fprintf(file, ",");
568    }
569    for (size_t i = 0; i < mFrames.size(); i++) {
570        FrameInfo& frame = mFrames[i];
571        if (frame[FrameInfoIndex::SyncStart] == 0) {
572            continue;
573        }
574        fprintf(file, "\n");
575        for (int i = 0; i < static_cast<int>(FrameInfoIndex::NumIndexes); i++) {
576            fprintf(file, "%" PRId64 ",", frame[i]);
577        }
578    }
579    fprintf(file, "\n---PROFILEDATA---\n\n");
580    fflush(file);
581}
582
583void CanvasContext::resetFrameStats() {
584    mFrames.clear();
585    mRenderThread.jankTracker().reset();
586}
587
588void CanvasContext::serializeDisplayListTree() {
589#if ENABLE_RENDERNODE_SERIALIZATION
590    using namespace google::protobuf::io;
591    char package[128];
592    // Check whether tracing is enabled for this process.
593    FILE * file = fopen("/proc/self/cmdline", "r");
594    if (file) {
595        if (!fgets(package, 128, file)) {
596            ALOGE("Error reading cmdline: %s (%d)", strerror(errno), errno);
597            fclose(file);
598            return;
599        }
600        fclose(file);
601    } else {
602        ALOGE("Error opening /proc/self/cmdline: %s (%d)", strerror(errno),
603                errno);
604        return;
605    }
606    char path[1024];
607    snprintf(path, 1024, "/data/data/%s/cache/rendertree_dump", package);
608    int fd = open(path, O_CREAT | O_WRONLY, S_IRWXU | S_IRGRP | S_IROTH);
609    if (fd == -1) {
610        ALOGD("Failed to open '%s'", path);
611        return;
612    }
613    proto::RenderNode tree;
614    // TODO: Streaming writes?
615    mRootRenderNode->copyTo(&tree);
616    std::string data = tree.SerializeAsString();
617    write(fd, data.c_str(), data.length());
618    close(fd);
619#endif
620}
621
622void CanvasContext::waitOnFences() {
623    if (mFrameFences.size()) {
624        ATRACE_CALL();
625        for (auto& fence : mFrameFences) {
626            fence->getResult();
627        }
628        mFrameFences.clear();
629    }
630}
631
632class CanvasContext::FuncTaskProcessor : public TaskProcessor<bool> {
633public:
634    explicit FuncTaskProcessor(TaskManager* taskManager)
635            : TaskProcessor<bool>(taskManager) {}
636
637    virtual void onProcess(const sp<Task<bool> >& task) override {
638        FuncTask* t = static_cast<FuncTask*>(task.get());
639        t->func();
640        task->setResult(true);
641    }
642};
643
644void CanvasContext::enqueueFrameWork(std::function<void()>&& func) {
645    if (!mFrameWorkProcessor.get()) {
646        mFrameWorkProcessor = new FuncTaskProcessor(mRenderPipeline->getTaskManager());
647    }
648    sp<FuncTask> task(new FuncTask());
649    task->func = func;
650    mFrameFences.push_back(task);
651    mFrameWorkProcessor->add(task);
652}
653
654int64_t CanvasContext::getFrameNumber() {
655    // mFrameNumber is reset to -1 when the surface changes or we swap buffers
656    if (mFrameNumber == -1 && mNativeSurface.get()) {
657        mFrameNumber = static_cast<int64_t>(mNativeSurface->getNextFrameNumber());
658    }
659    return mFrameNumber;
660}
661
662SkRect CanvasContext::computeDirtyRect(const Frame& frame, SkRect* dirty) {
663    if (frame.width() != mLastFrameWidth || frame.height() != mLastFrameHeight) {
664        // can't rely on prior content of window if viewport size changes
665        dirty->setEmpty();
666        mLastFrameWidth = frame.width();
667        mLastFrameHeight = frame.height();
668    } else if (mHaveNewSurface || frame.bufferAge() == 0) {
669        // New surface needs a full draw
670        dirty->setEmpty();
671    } else {
672        if (!dirty->isEmpty() && !dirty->intersect(0, 0, frame.width(), frame.height())) {
673            ALOGW("Dirty " RECT_STRING " doesn't intersect with 0 0 %d %d ?",
674                    SK_RECT_ARGS(*dirty), frame.width(), frame.height());
675            dirty->setEmpty();
676        }
677        profiler().unionDirty(dirty);
678    }
679
680    if (dirty->isEmpty()) {
681        dirty->set(0, 0, frame.width(), frame.height());
682    }
683
684    // At this point dirty is the area of the window to update. However,
685    // the area of the frame we need to repaint is potentially different, so
686    // stash the screen area for later
687    SkRect windowDirty(*dirty);
688
689    // If the buffer age is 0 we do a full-screen repaint (handled above)
690    // If the buffer age is 1 the buffer contents are the same as they were
691    // last frame so there's nothing to union() against
692    // Therefore we only care about the > 1 case.
693    if (frame.bufferAge() > 1) {
694        if (frame.bufferAge() > (int) mSwapHistory.size()) {
695            // We don't have enough history to handle this old of a buffer
696            // Just do a full-draw
697            dirty->set(0, 0, frame.width(), frame.height());
698        } else {
699            // At this point we haven't yet added the latest frame
700            // to the damage history (happens below)
701            // So we need to damage
702            for (int i = mSwapHistory.size() - 1;
703                    i > ((int) mSwapHistory.size()) - frame.bufferAge(); i--) {
704                dirty->join(mSwapHistory[i].damage);
705            }
706        }
707    }
708
709    return windowDirty;
710}
711
712} /* namespace renderthread */
713} /* namespace uirenderer */
714} /* namespace android */
715