CanvasContext.cpp revision a67b62e15e20bac6a9664e6e6be923cf82ad4138 
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
57static float sBenchMma = 0;
58static int sFrameCount = 0;
59static const float NANOS_PER_MILLIS_F = 1000000.0f;
60#endif
61
62namespace android {
63namespace uirenderer {
64namespace renderthread {
65
66CanvasContext* 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
88void 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
104void 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
123void 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
139CanvasContext::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.mainDisplayInfo())
146        , mProfiler(mFrames)
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
155CanvasContext::~CanvasContext() {
156    destroy();
157    mRenderThread.renderState().unregisterCanvasContext(this);
158    for (auto& node : mRenderNodes) {
159        node->clearRoot();
160    }
161    mRenderNodes.clear();
162}
163
164void 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
170void CanvasContext::removeRenderNode(RenderNode* node) {
171    node->clearRoot();
172    mRenderNodes.erase(std::remove(mRenderNodes.begin(), mRenderNodes.end(), node),
173            mRenderNodes.end());
174}
175
176void CanvasContext::destroy() {
177    stopDrawing();
178    setSurface(nullptr);
179    freePrefetchedLayers();
180    destroyHardwareResources();
181    mAnimationContext->destroy();
182}
183
184void CanvasContext::setSurface(Surface* surface) {
185    ATRACE_CALL();
186
187    mNativeSurface = surface;
188
189    bool hasSurface = mRenderPipeline->setSurface(surface, mSwapBehavior);
190
191    mFrameNumber = -1;
192
193    if (hasSurface) {
194         mHaveNewSurface = true;
195         mSwapHistory.clear();
196    } else {
197         mRenderThread.removeFrameCallback(this);
198    }
199}
200
201void CanvasContext::setSwapBehavior(SwapBehavior swapBehavior) {
202    mSwapBehavior = swapBehavior;
203}
204
205void CanvasContext::initialize(Surface* surface) {
206    setSurface(surface);
207}
208
209void CanvasContext::updateSurface(Surface* surface) {
210    setSurface(surface);
211}
212
213bool CanvasContext::pauseSurface(Surface* surface) {
214    return mRenderThread.removeFrameCallback(this);
215}
216
217void CanvasContext::setStopped(bool stopped) {
218    if (mStopped != stopped) {
219        mStopped = stopped;
220        if (mStopped) {
221            mRenderThread.removeFrameCallback(this);
222            mRenderPipeline->onStop();
223        } else if (mIsDirty && hasSurface()) {
224            mRenderThread.postFrameCallback(this);
225        }
226    }
227}
228
229void CanvasContext::setup(float lightRadius,
230        uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha) {
231    mLightGeometry.radius = lightRadius;
232    mLightInfo.ambientShadowAlpha = ambientShadowAlpha;
233    mLightInfo.spotShadowAlpha = spotShadowAlpha;
234}
235
236void CanvasContext::setLightCenter(const Vector3& lightCenter) {
237    mLightGeometry.center = lightCenter;
238}
239
240void CanvasContext::setOpaque(bool opaque) {
241    mOpaque = opaque;
242}
243
244bool CanvasContext::makeCurrent() {
245    if (mStopped) return false;
246
247    auto result = mRenderPipeline->makeCurrent();
248    switch (result) {
249        case MakeCurrentResult::AlreadyCurrent:
250            return true;
251        case MakeCurrentResult::Failed:
252            mHaveNewSurface = true;
253            setSurface(nullptr);
254            return false;
255        case MakeCurrentResult::Succeeded:
256            mHaveNewSurface = true;
257            return true;
258        default:
259            LOG_ALWAYS_FATAL("unexpected result %d from IRenderPipeline::makeCurrent",
260                    (int32_t) result);
261    }
262
263    return true;
264}
265
266static bool wasSkipped(FrameInfo* info) {
267    return info && ((*info)[FrameInfoIndex::Flags] & FrameInfoFlags::SkippedFrame);
268}
269
270bool CanvasContext::isSwapChainStuffed() {
271    static const auto SLOW_THRESHOLD = 6_ms;
272
273    if (mSwapHistory.size() != mSwapHistory.capacity()) {
274        // We want at least 3 frames of history before attempting to
275        // guess if the queue is stuffed
276        return false;
277    }
278    nsecs_t frameInterval = mRenderThread.timeLord().frameIntervalNanos();
279    auto& swapA = mSwapHistory[0];
280
281    // Was there a happy queue & dequeue time? If so, don't
282    // consider it stuffed
283    if (swapA.dequeueDuration < SLOW_THRESHOLD
284            && swapA.queueDuration < SLOW_THRESHOLD) {
285        return false;
286    }
287
288    for (size_t i = 1; i < mSwapHistory.size(); i++) {
289        auto& swapB = mSwapHistory[i];
290
291        // If there's a multi-frameInterval gap we effectively already dropped a frame,
292        // so consider the queue healthy.
293        if (swapA.swapCompletedTime - swapB.swapCompletedTime > frameInterval * 3) {
294            return false;
295        }
296
297        // Was there a happy queue & dequeue time? If so, don't
298        // consider it stuffed
299        if (swapB.dequeueDuration < SLOW_THRESHOLD
300                && swapB.queueDuration < SLOW_THRESHOLD) {
301            return false;
302        }
303
304        swapA = swapB;
305    }
306
307    // All signs point to a stuffed swap chain
308    ATRACE_NAME("swap chain stuffed");
309    return true;
310}
311
312void CanvasContext::prepareTree(TreeInfo& info, int64_t* uiFrameInfo,
313        int64_t syncQueued, RenderNode* target) {
314    mRenderThread.removeFrameCallback(this);
315
316    // If the previous frame was dropped we don't need to hold onto it, so
317    // just keep using the previous frame's structure instead
318    if (!wasSkipped(mCurrentFrameInfo)) {
319        mCurrentFrameInfo = &mFrames.next();
320    }
321    mCurrentFrameInfo->importUiThreadInfo(uiFrameInfo);
322    mCurrentFrameInfo->set(FrameInfoIndex::SyncQueued) = syncQueued;
323    mCurrentFrameInfo->markSyncStart();
324
325    info.damageAccumulator = &mDamageAccumulator;
326    info.layerUpdateQueue = &mLayerUpdateQueue;
327
328    mAnimationContext->startFrame(info.mode);
329    for (const sp<RenderNode>& node : mRenderNodes) {
330        // Only the primary target node will be drawn full - all other nodes would get drawn in
331        // real time mode. In case of a window, the primary node is the window content and the other
332        // node(s) are non client / filler nodes.
333        info.mode = (node.get() == target ? TreeInfo::MODE_FULL : TreeInfo::MODE_RT_ONLY);
334        node->prepareTree(info);
335        GL_CHECKPOINT(MODERATE);
336    }
337    mAnimationContext->runRemainingAnimations(info);
338    GL_CHECKPOINT(MODERATE);
339
340    freePrefetchedLayers();
341    GL_CHECKPOINT(MODERATE);
342
343    mIsDirty = true;
344
345    if (CC_UNLIKELY(!mNativeSurface.get())) {
346        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
347        info.out.canDrawThisFrame = false;
348        return;
349    }
350
351    if (CC_LIKELY(mSwapHistory.size() && !Properties::forceDrawFrame)) {
352        nsecs_t latestVsync = mRenderThread.timeLord().latestVsync();
353        SwapHistory& lastSwap = mSwapHistory.back();
354        nsecs_t vsyncDelta = std::abs(lastSwap.vsyncTime - latestVsync);
355        // The slight fudge-factor is to deal with cases where
356        // the vsync was estimated due to being slow handling the signal.
357        // See the logic in TimeLord#computeFrameTimeNanos or in
358        // Choreographer.java for details on when this happens
359        if (vsyncDelta < 2_ms) {
360            // Already drew for this vsync pulse, UI draw request missed
361            // the deadline for RT animations
362            info.out.canDrawThisFrame = false;
363        } else if (vsyncDelta >= mRenderThread.timeLord().frameIntervalNanos() * 3
364                || (latestVsync - mLastDropVsync) < 500_ms) {
365            // It's been several frame intervals, assume the buffer queue is fine
366            // or the last drop was too recent
367            info.out.canDrawThisFrame = true;
368        } else {
369            info.out.canDrawThisFrame = !isSwapChainStuffed();
370            if (!info.out.canDrawThisFrame) {
371                // dropping frame
372                mLastDropVsync = mRenderThread.timeLord().latestVsync();
373            }
374        }
375    } else {
376        info.out.canDrawThisFrame = true;
377    }
378
379    if (!info.out.canDrawThisFrame) {
380        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
381    }
382
383    if (info.out.hasAnimations || !info.out.canDrawThisFrame) {
384        if (!info.out.requiresUiRedraw) {
385            // If animationsNeedsRedraw is set don't bother posting for an RT anim
386            // as we will just end up fighting the UI thread.
387            mRenderThread.postFrameCallback(this);
388        }
389    }
390}
391
392void CanvasContext::stopDrawing() {
393    mRenderThread.removeFrameCallback(this);
394    mAnimationContext->pauseAnimators();
395}
396
397void CanvasContext::notifyFramePending() {
398    ATRACE_CALL();
399    mRenderThread.pushBackFrameCallback(this);
400}
401
402void CanvasContext::draw() {
403    SkRect dirty;
404    mDamageAccumulator.finish(&dirty);
405
406    // TODO: Re-enable after figuring out cause of b/22592975
407//    if (dirty.isEmpty() && Properties::skipEmptyFrames) {
408//        mCurrentFrameInfo->addFlag(FrameInfoFlags::SkippedFrame);
409//        return;
410//    }
411
412    mCurrentFrameInfo->markIssueDrawCommandsStart();
413
414    Frame frame = mRenderPipeline->getFrame();
415
416    SkRect windowDirty = computeDirtyRect(frame, &dirty);
417
418    bool drew = mRenderPipeline->draw(frame, windowDirty, dirty, mLightGeometry, &mLayerUpdateQueue,
419            mContentDrawBounds, mOpaque, mLightInfo, mRenderNodes, &(profiler()));
420
421    waitOnFences();
422
423    bool requireSwap = false;
424    bool didSwap = mRenderPipeline->swapBuffers(frame, drew, windowDirty, mCurrentFrameInfo,
425            &requireSwap);
426
427    mIsDirty = false;
428
429    if (requireSwap) {
430        if (!didSwap) { //some error happened
431            setSurface(nullptr);
432        }
433        SwapHistory& swap = mSwapHistory.next();
434        swap.damage = windowDirty;
435        swap.swapCompletedTime = systemTime(CLOCK_MONOTONIC);
436        swap.vsyncTime = mRenderThread.timeLord().latestVsync();
437        if (mNativeSurface.get()) {
438            int durationUs;
439            nsecs_t dequeueStart = mNativeSurface->getLastDequeueStartTime();
440            if (dequeueStart < mCurrentFrameInfo->get(FrameInfoIndex::SyncStart)) {
441                // Ignoring dequeue duration as it happened prior to frame render start
442                // and thus is not part of the frame.
443                swap.dequeueDuration = 0;
444            } else {
445                mNativeSurface->query(NATIVE_WINDOW_LAST_DEQUEUE_DURATION, &durationUs);
446                swap.dequeueDuration = us2ns(durationUs);
447            }
448            mNativeSurface->query(NATIVE_WINDOW_LAST_QUEUE_DURATION, &durationUs);
449            swap.queueDuration = us2ns(durationUs);
450        } else {
451            swap.dequeueDuration = 0;
452            swap.queueDuration = 0;
453        }
454        mCurrentFrameInfo->set(FrameInfoIndex::DequeueBufferDuration)
455                = swap.dequeueDuration;
456        mCurrentFrameInfo->set(FrameInfoIndex::QueueBufferDuration)
457                = swap.queueDuration;
458        mHaveNewSurface = false;
459        mFrameNumber = -1;
460    } else {
461        mCurrentFrameInfo->set(FrameInfoIndex::DequeueBufferDuration) = 0;
462        mCurrentFrameInfo->set(FrameInfoIndex::QueueBufferDuration) = 0;
463    }
464
465    // TODO: Use a fence for real completion?
466    mCurrentFrameInfo->markFrameCompleted();
467
468#if LOG_FRAMETIME_MMA
469    float thisFrame = mCurrentFrameInfo->duration(
470            FrameInfoIndex::IssueDrawCommandsStart,
471            FrameInfoIndex::FrameCompleted) / NANOS_PER_MILLIS_F;
472    if (sFrameCount) {
473        sBenchMma = ((9 * sBenchMma) + thisFrame) / 10;
474    } else {
475        sBenchMma = thisFrame;
476    }
477    if (++sFrameCount == 10) {
478        sFrameCount = 1;
479        ALOGD("Average frame time: %.4f", sBenchMma);
480    }
481#endif
482
483    mJankTracker.addFrame(*mCurrentFrameInfo);
484    mRenderThread.jankTracker().addFrame(*mCurrentFrameInfo);
485    if (CC_UNLIKELY(mFrameMetricsReporter.get() != nullptr)) {
486        mFrameMetricsReporter->reportFrameMetrics(mCurrentFrameInfo->data());
487    }
488
489    GpuMemoryTracker::onFrameCompleted();
490#ifdef BUGREPORT_FONT_CACHE_USAGE
491    auto renderType = Properties::getRenderPipelineType();
492    if (RenderPipelineType::OpenGL == renderType) {
493        Caches& caches = Caches::getInstance();
494        caches.fontRenderer.getFontRenderer().historyTracker().frameCompleted();
495    }
496#endif
497
498}
499
500// Called by choreographer to do an RT-driven animation
501void CanvasContext::doFrame() {
502    if (!mRenderPipeline->isSurfaceReady()) return;
503    prepareAndDraw(nullptr);
504}
505
506void CanvasContext::prepareAndDraw(RenderNode* node) {
507    ATRACE_CALL();
508
509    nsecs_t vsync = mRenderThread.timeLord().computeFrameTimeNanos();
510    int64_t frameInfo[UI_THREAD_FRAME_INFO_SIZE];
511    UiFrameInfoBuilder(frameInfo)
512        .addFlag(FrameInfoFlags::RTAnimation)
513        .setVsync(vsync, vsync);
514
515    TreeInfo info(TreeInfo::MODE_RT_ONLY, *this);
516    prepareTree(info, frameInfo, systemTime(CLOCK_MONOTONIC), node);
517    if (info.out.canDrawThisFrame) {
518        draw();
519    } else {
520        // wait on fences so tasks don't overlap next frame
521        waitOnFences();
522    }
523}
524
525void CanvasContext::markLayerInUse(RenderNode* node) {
526    if (mPrefetchedLayers.erase(node)) {
527        node->decStrong(nullptr);
528    }
529}
530
531void CanvasContext::freePrefetchedLayers() {
532    if (mPrefetchedLayers.size()) {
533        for (auto& node : mPrefetchedLayers) {
534            ALOGW("Incorrectly called buildLayer on View: %s, destroying layer...",
535                    node->getName());
536            node->destroyLayers();
537            node->decStrong(nullptr);
538        }
539        mPrefetchedLayers.clear();
540    }
541}
542
543void CanvasContext::buildLayer(RenderNode* node) {
544    ATRACE_CALL();
545    if (!mRenderPipeline->isContextReady()) return;
546
547    // buildLayer() will leave the tree in an unknown state, so we must stop drawing
548    stopDrawing();
549
550    TreeInfo info(TreeInfo::MODE_FULL, *this);
551    info.damageAccumulator = &mDamageAccumulator;
552    info.layerUpdateQueue = &mLayerUpdateQueue;
553    info.runAnimations = false;
554    node->prepareTree(info);
555    SkRect ignore;
556    mDamageAccumulator.finish(&ignore);
557    // Tickle the GENERIC property on node to mark it as dirty for damaging
558    // purposes when the frame is actually drawn
559    node->setPropertyFieldsDirty(RenderNode::GENERIC);
560
561    mRenderPipeline->renderLayers(mLightGeometry, &mLayerUpdateQueue, mOpaque, mLightInfo);
562
563    node->incStrong(nullptr);
564    mPrefetchedLayers.insert(node);
565}
566
567bool CanvasContext::copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap) {
568    return mRenderPipeline->copyLayerInto(layer, bitmap);
569}
570
571void CanvasContext::destroyHardwareResources() {
572    stopDrawing();
573    if (mRenderPipeline->isContextReady()) {
574        freePrefetchedLayers();
575        for (const sp<RenderNode>& node : mRenderNodes) {
576            node->destroyHardwareResources();
577        }
578        mRenderPipeline->onDestroyHardwareResources();
579    }
580}
581
582void CanvasContext::trimMemory(RenderThread& thread, int level) {
583    // No context means nothing to free
584    if (!thread.eglManager().hasEglContext()) return;
585
586    ATRACE_CALL();
587    if (level >= TRIM_MEMORY_COMPLETE) {
588        thread.renderState().flush(Caches::FlushMode::Full);
589        thread.eglManager().destroy();
590    } else if (level >= TRIM_MEMORY_UI_HIDDEN) {
591        thread.renderState().flush(Caches::FlushMode::Moderate);
592    }
593}
594
595DeferredLayerUpdater* CanvasContext::createTextureLayer() {
596    return mRenderPipeline->createTextureLayer();
597}
598
599void CanvasContext::dumpFrames(int fd) {
600    mJankTracker.dump(fd);
601    FILE* file = fdopen(fd, "a");
602    fprintf(file, "\n\n---PROFILEDATA---\n");
603    for (size_t i = 0; i < static_cast<size_t>(FrameInfoIndex::NumIndexes); i++) {
604        fprintf(file, "%s", FrameInfoNames[i].c_str());
605        fprintf(file, ",");
606    }
607    for (size_t i = 0; i < mFrames.size(); i++) {
608        FrameInfo& frame = mFrames[i];
609        if (frame[FrameInfoIndex::SyncStart] == 0) {
610            continue;
611        }
612        fprintf(file, "\n");
613        for (int i = 0; i < static_cast<int>(FrameInfoIndex::NumIndexes); i++) {
614            fprintf(file, "%" PRId64 ",", frame[i]);
615        }
616    }
617    fprintf(file, "\n---PROFILEDATA---\n\n");
618    fflush(file);
619}
620
621void CanvasContext::resetFrameStats() {
622    mFrames.clear();
623    mRenderThread.jankTracker().reset();
624}
625
626void CanvasContext::setName(const std::string&& name) {
627    mJankTracker.setDescription(JankTrackerType::Window, std::move(name));
628}
629
630void CanvasContext::serializeDisplayListTree() {
631#if ENABLE_RENDERNODE_SERIALIZATION
632    using namespace google::protobuf::io;
633    char package[128];
634    // Check whether tracing is enabled for this process.
635    FILE * file = fopen("/proc/self/cmdline", "r");
636    if (file) {
637        if (!fgets(package, 128, file)) {
638            ALOGE("Error reading cmdline: %s (%d)", strerror(errno), errno);
639            fclose(file);
640            return;
641        }
642        fclose(file);
643    } else {
644        ALOGE("Error opening /proc/self/cmdline: %s (%d)", strerror(errno),
645                errno);
646        return;
647    }
648    char path[1024];
649    snprintf(path, 1024, "/data/data/%s/cache/rendertree_dump", package);
650    int fd = open(path, O_CREAT | O_WRONLY, S_IRWXU | S_IRGRP | S_IROTH);
651    if (fd == -1) {
652        ALOGD("Failed to open '%s'", path);
653        return;
654    }
655    proto::RenderNode tree;
656    // TODO: Streaming writes?
657    mRootRenderNode->copyTo(&tree);
658    std::string data = tree.SerializeAsString();
659    write(fd, data.c_str(), data.length());
660    close(fd);
661#endif
662}
663
664void CanvasContext::waitOnFences() {
665    if (mFrameFences.size()) {
666        ATRACE_CALL();
667        for (auto& fence : mFrameFences) {
668            fence->getResult();
669        }
670        mFrameFences.clear();
671    }
672}
673
674class CanvasContext::FuncTaskProcessor : public TaskProcessor<bool> {
675public:
676    explicit FuncTaskProcessor(TaskManager* taskManager)
677            : TaskProcessor<bool>(taskManager) {}
678
679    virtual void onProcess(const sp<Task<bool> >& task) override {
680        FuncTask* t = static_cast<FuncTask*>(task.get());
681        t->func();
682        task->setResult(true);
683    }
684};
685
686void CanvasContext::enqueueFrameWork(std::function<void()>&& func) {
687    if (!mFrameWorkProcessor.get()) {
688        mFrameWorkProcessor = new FuncTaskProcessor(mRenderPipeline->getTaskManager());
689    }
690    sp<FuncTask> task(new FuncTask());
691    task->func = func;
692    mFrameFences.push_back(task);
693    mFrameWorkProcessor->add(task);
694}
695
696int64_t CanvasContext::getFrameNumber() {
697    // mFrameNumber is reset to -1 when the surface changes or we swap buffers
698    if (mFrameNumber == -1 && mNativeSurface.get()) {
699        mFrameNumber = static_cast<int64_t>(mNativeSurface->getNextFrameNumber());
700    }
701    return mFrameNumber;
702}
703
704SkRect CanvasContext::computeDirtyRect(const Frame& frame, SkRect* dirty) {
705    if (frame.width() != mLastFrameWidth || frame.height() != mLastFrameHeight) {
706        // can't rely on prior content of window if viewport size changes
707        dirty->setEmpty();
708        mLastFrameWidth = frame.width();
709        mLastFrameHeight = frame.height();
710    } else if (mHaveNewSurface || frame.bufferAge() == 0) {
711        // New surface needs a full draw
712        dirty->setEmpty();
713    } else {
714        if (!dirty->isEmpty() && !dirty->intersect(0, 0, frame.width(), frame.height())) {
715            ALOGW("Dirty " RECT_STRING " doesn't intersect with 0 0 %d %d ?",
716                    SK_RECT_ARGS(*dirty), frame.width(), frame.height());
717            dirty->setEmpty();
718        }
719        profiler().unionDirty(dirty);
720    }
721
722    if (dirty->isEmpty()) {
723        dirty->set(0, 0, frame.width(), frame.height());
724    }
725
726    // At this point dirty is the area of the window to update. However,
727    // the area of the frame we need to repaint is potentially different, so
728    // stash the screen area for later
729    SkRect windowDirty(*dirty);
730
731    // If the buffer age is 0 we do a full-screen repaint (handled above)
732    // If the buffer age is 1 the buffer contents are the same as they were
733    // last frame so there's nothing to union() against
734    // Therefore we only care about the > 1 case.
735    if (frame.bufferAge() > 1) {
736        if (frame.bufferAge() > (int) mSwapHistory.size()) {
737            // We don't have enough history to handle this old of a buffer
738            // Just do a full-draw
739            dirty->set(0, 0, frame.width(), frame.height());
740        } else {
741            // At this point we haven't yet added the latest frame
742            // to the damage history (happens below)
743            // So we need to damage
744            for (int i = mSwapHistory.size() - 1;
745                    i > ((int) mSwapHistory.size()) - frame.bufferAge(); i--) {
746                dirty->join(mSwapHistory[i].damage);
747            }
748        }
749    }
750
751    return windowDirty;
752}
753
754} /* namespace renderthread */
755} /* namespace uirenderer */
756} /* namespace android */
757