Home | History | Annotate | Download | only in renderthread 
      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 #include "thread/ThreadBase.h"
     26 
     27 #include <GrContext.h>
     28 #include <SkBitmap.h>
     29 #include <cutils/compiler.h>
     30 #include <ui/DisplayInfo.h>
     31 #include <utils/Looper.h>
     32 #include <utils/Thread.h>
     33 
     34 #include <thread/ThreadBase.h>
     35 #include <memory>
     36 #include <mutex>
     37 #include <set>
     38 
     39 namespace android {
     40 
     41 class Bitmap;
     42 
     43 namespace uirenderer {
     44 
     45 class Readback;
     46 class RenderState;
     47 class TestUtils;
     48 
     49 namespace renderthread {
     50 
     51 class CanvasContext;
     52 class EglManager;
     53 class RenderProxy;
     54 class VulkanManager;
     55 
     56 // Mimics android.view.Choreographer.FrameCallback
     57 class IFrameCallback {
     58 public:
     59     virtual void doFrame() = 0;
     60 
     61 protected:
     62     ~IFrameCallback() {}
     63 };
     64 
     65 struct VsyncSource {
     66     virtual void requestNextVsync() = 0;
     67     virtual nsecs_t latestVsyncEvent() = 0;
     68     virtual ~VsyncSource() {}
     69 };
     70 
     71 class DummyVsyncSource;
     72 
     73 class RenderThread : private ThreadBase {
     74     PREVENT_COPY_AND_ASSIGN(RenderThread);
     75 
     76 public:
     77     // Sets a callback that fires before any RenderThread setup has occured.
     78     ANDROID_API static void setOnStartHook(void (*onStartHook)());
     79 
     80     WorkQueue& queue() { return ThreadBase::queue(); }
     81 
     82     // Mimics android.view.Choreographer
     83     void postFrameCallback(IFrameCallback* callback);
     84     bool removeFrameCallback(IFrameCallback* callback);
     85     // If the callback is currently registered, it will be pushed back until
     86     // the next vsync. If it is not currently registered this does nothing.
     87     void pushBackFrameCallback(IFrameCallback* callback);
     88 
     89     TimeLord& timeLord() { return mTimeLord; }
     90     RenderState& renderState() const { return *mRenderState; }
     91     EglManager& eglManager() const { return *mEglManager; }
     92     ProfileDataContainer& globalProfileData() { return mGlobalProfileData; }
     93     Readback& readback();
     94 
     95     const DisplayInfo& mainDisplayInfo() { return mDisplayInfo; }
     96 
     97     GrContext* getGrContext() const { return mGrContext.get(); }
     98     void setGrContext(sk_sp<GrContext> cxt);
     99 
    100     CacheManager& cacheManager() { return *mCacheManager; }
    101     VulkanManager& vulkanManager() { return *mVkManager; }
    102 
    103     sk_sp<Bitmap> allocateHardwareBitmap(SkBitmap& skBitmap);
    104     void dumpGraphicsMemory(int fd);
    105 
    106     /**
    107      * isCurrent provides a way to query, if the caller is running on
    108      * the render thread.
    109      *
    110      * @return true only if isCurrent is invoked from the render thread.
    111      */
    112     static bool isCurrent();
    113 
    114 protected:
    115     virtual bool threadLoop() override;
    116 
    117 private:
    118     friend class DispatchFrameCallbacks;
    119     friend class RenderProxy;
    120     friend class DummyVsyncSource;
    121     friend class android::uirenderer::TestUtils;
    122 
    123     RenderThread();
    124     virtual ~RenderThread();
    125 
    126     static bool hasInstance();
    127     static RenderThread& getInstance();
    128 
    129     void initThreadLocals();
    130     void initializeDisplayEventReceiver();
    131     static int displayEventReceiverCallback(int fd, int events, void* data);
    132     void drainDisplayEventQueue();
    133     void dispatchFrameCallbacks();
    134     void requestVsync();
    135 
    136     DisplayInfo mDisplayInfo;
    137 
    138     VsyncSource* mVsyncSource;
    139     bool mVsyncRequested;
    140     std::set<IFrameCallback*> mFrameCallbacks;
    141     // We defer the actual registration of these callbacks until
    142     // both mQueue *and* mDisplayEventReceiver have been drained off all
    143     // immediate events. This makes sure that we catch the next vsync, not
    144     // the previous one
    145     std::set<IFrameCallback*> mPendingRegistrationFrameCallbacks;
    146     bool mFrameCallbackTaskPending;
    147 
    148     TimeLord mTimeLord;
    149     RenderState* mRenderState;
    150     EglManager* mEglManager;
    151 
    152     ProfileDataContainer mGlobalProfileData;
    153     Readback* mReadback = nullptr;
    154 
    155     sk_sp<GrContext> mGrContext;
    156     CacheManager* mCacheManager;
    157     VulkanManager* mVkManager;
    158 };
    159 
    160 } /* namespace renderthread */
    161 } /* namespace uirenderer */
    162 } /* namespace android */
    163 #endif /* RENDERTHREAD_H_ */
    164