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      1 /*
      2  * Copyright (C) 2013 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 #ifndef RENDERTHREAD_H_
     18 #define RENDERTHREAD_H_
     19 
     20 #include "RenderTask.h"
     21 
     22 #include "../JankTracker.h"
     23 #include "CacheManager.h"
     24 #include "TimeLord.h"
     25 
     26 #include <GrContext.h>
     27 #include <cutils/compiler.h>
     28 #include <SkBitmap.h>
     29 #include <ui/DisplayInfo.h>
     30 #include <utils/Looper.h>
     31 #include <utils/Thread.h>
     32 
     33 #include <memory>
     34 #include <set>
     35 
     36 namespace android {
     37 
     38 class Bitmap;
     39 class DisplayEventReceiver;
     40 
     41 namespace uirenderer {
     42 
     43 class Readback;
     44 class RenderState;
     45 class TestUtils;
     46 
     47 namespace renderthread {
     48 
     49 class CanvasContext;
     50 class DispatchFrameCallbacks;
     51 class EglManager;
     52 class RenderProxy;
     53 class VulkanManager;
     54 
     55 class TaskQueue {
     56 public:
     57     TaskQueue();
     58 
     59     RenderTask* next();
     60     void queue(RenderTask* task);
     61     void queueAtFront(RenderTask* task);
     62     RenderTask* peek();
     63     void remove(RenderTask* task);
     64 
     65 private:
     66     RenderTask* mHead;
     67     RenderTask* mTail;
     68 };
     69 
     70 // Mimics android.view.Choreographer.FrameCallback
     71 class IFrameCallback {
     72 public:
     73     virtual void doFrame() = 0;
     74 
     75 protected:
     76     ~IFrameCallback() {}
     77 };
     78 
     79 class ANDROID_API RenderThread : public Thread {
     80     PREVENT_COPY_AND_ASSIGN(RenderThread);
     81 public:
     82     // RenderThread takes complete ownership of tasks that are queued
     83     // and will delete them after they are run
     84     ANDROID_API void queue(RenderTask* task);
     85     ANDROID_API void queueAndWait(RenderTask* task);
     86     ANDROID_API void queueAtFront(RenderTask* task);
     87     void queueAt(RenderTask* task, nsecs_t runAtNs);
     88     void remove(RenderTask* task);
     89 
     90     // Mimics android.view.Choreographer
     91     void postFrameCallback(IFrameCallback* callback);
     92     bool removeFrameCallback(IFrameCallback* callback);
     93     // If the callback is currently registered, it will be pushed back until
     94     // the next vsync. If it is not currently registered this does nothing.
     95     void pushBackFrameCallback(IFrameCallback* callback);
     96 
     97     TimeLord& timeLord() { return mTimeLord; }
     98     RenderState& renderState() const { return *mRenderState; }
     99     EglManager& eglManager() const { return *mEglManager; }
    100     ProfileDataContainer& globalProfileData() { return mGlobalProfileData; }
    101     Readback& readback();
    102 
    103     const DisplayInfo& mainDisplayInfo() { return mDisplayInfo; }
    104 
    105     GrContext* getGrContext() const { return mGrContext.get(); }
    106     void setGrContext(GrContext* cxt);
    107 
    108     CacheManager& cacheManager() { return *mCacheManager; }
    109     VulkanManager& vulkanManager() { return *mVkManager; }
    110 
    111     sk_sp<Bitmap> allocateHardwareBitmap(SkBitmap& skBitmap);
    112     void dumpGraphicsMemory(int fd);
    113 
    114 protected:
    115     virtual bool threadLoop() override;
    116 
    117 private:
    118     friend class DispatchFrameCallbacks;
    119     friend class RenderProxy;
    120     friend class android::uirenderer::TestUtils;
    121 
    122     RenderThread();
    123     virtual ~RenderThread();
    124 
    125     static bool hasInstance();
    126     static RenderThread& getInstance();
    127 
    128     void initThreadLocals();
    129     void initializeDisplayEventReceiver();
    130     static int displayEventReceiverCallback(int fd, int events, void* data);
    131     void drainDisplayEventQueue();
    132     void dispatchFrameCallbacks();
    133     void requestVsync();
    134 
    135     // Returns the next task to be run. If this returns NULL nextWakeup is set
    136     // to the time to requery for the nextTask to run. mNextWakeup is also
    137     // set to this time
    138     RenderTask* nextTask(nsecs_t* nextWakeup);
    139 
    140     sp<Looper> mLooper;
    141     Mutex mLock;
    142 
    143     nsecs_t mNextWakeup;
    144     TaskQueue mQueue;
    145 
    146     DisplayInfo mDisplayInfo;
    147 
    148     DisplayEventReceiver* mDisplayEventReceiver;
    149     bool mVsyncRequested;
    150     std::set<IFrameCallback*> mFrameCallbacks;
    151     // We defer the actual registration of these callbacks until
    152     // both mQueue *and* mDisplayEventReceiver have been drained off all
    153     // immediate events. This makes sure that we catch the next vsync, not
    154     // the previous one
    155     std::set<IFrameCallback*> mPendingRegistrationFrameCallbacks;
    156     bool mFrameCallbackTaskPending;
    157     DispatchFrameCallbacks* mFrameCallbackTask;
    158 
    159     TimeLord mTimeLord;
    160     RenderState* mRenderState;
    161     EglManager* mEglManager;
    162 
    163     ProfileDataContainer mGlobalProfileData;
    164     Readback* mReadback = nullptr;
    165 
    166     sk_sp<GrContext> mGrContext;
    167     CacheManager* mCacheManager;
    168     VulkanManager* mVkManager;
    169 };
    170 
    171 } /* namespace renderthread */
    172 } /* namespace uirenderer */
    173 } /* namespace android */
    174 #endif /* RENDERTHREAD_H_ */
    175