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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 #ifndef DRAWFRAMETASK_H
     17 #define DRAWFRAMETASK_H
     18 
     19 #include <vector>
     20 
     21 #include <utils/Condition.h>
     22 #include <utils/Mutex.h>
     23 #include <utils/StrongPointer.h>
     24 
     25 #include "RenderTask.h"
     26 
     27 #include "../FrameInfo.h"
     28 #include "../Rect.h"
     29 #include "../TreeInfo.h"
     30 
     31 namespace android {
     32 namespace uirenderer {
     33 
     34 class DeferredLayerUpdater;
     35 class RenderNode;
     36 
     37 namespace renderthread {
     38 
     39 class CanvasContext;
     40 class RenderThread;
     41 
     42 namespace SyncResult {
     43 enum {
     44     OK = 0,
     45     UIRedrawRequired = 1 << 0,
     46     LostSurfaceRewardIfFound = 1 << 1,
     47     ContextIsStopped = 1 << 2,
     48     FrameDropped = 1 << 3,
     49 };
     50 }
     51 
     52 /*
     53  * This is a special Super Task. It is re-used multiple times by RenderProxy,
     54  * and contains state (such as layer updaters & new DisplayLists) that is
     55  * tracked across many frames not just a single frame.
     56  * It is the sync-state task, and will kick off the post-sync draw
     57  */
     58 class DrawFrameTask {
     59 public:
     60     DrawFrameTask();
     61     virtual ~DrawFrameTask();
     62 
     63     void setContext(RenderThread* thread, CanvasContext* context, RenderNode* targetNode);
     64     void setContentDrawBounds(int left, int top, int right, int bottom) {
     65         mContentDrawBounds.set(left, top, right, bottom);
     66     }
     67 
     68     void pushLayerUpdate(DeferredLayerUpdater* layer);
     69     void removeLayerUpdate(DeferredLayerUpdater* layer);
     70 
     71     int drawFrame();
     72 
     73     int64_t* frameInfo() { return mFrameInfo; }
     74 
     75     void run();
     76 
     77     void setFrameCallback(std::function<void(int64_t)>&& callback) {
     78         mFrameCallback = std::move(callback);
     79     }
     80 
     81     void setFrameCompleteCallback(std::function<void(int64_t)>&& callback) {
     82         mFrameCompleteCallback = std::move(callback);
     83     }
     84 
     85 private:
     86     void postAndWait();
     87     bool syncFrameState(TreeInfo& info);
     88     void unblockUiThread();
     89 
     90     Mutex mLock;
     91     Condition mSignal;
     92 
     93     RenderThread* mRenderThread;
     94     CanvasContext* mContext;
     95     RenderNode* mTargetNode = nullptr;
     96     Rect mContentDrawBounds;
     97 
     98     /*********************************************
     99      *  Single frame data
    100      *********************************************/
    101     std::vector<sp<DeferredLayerUpdater> > mLayers;
    102 
    103     int mSyncResult;
    104     int64_t mSyncQueued;
    105 
    106     int64_t mFrameInfo[UI_THREAD_FRAME_INFO_SIZE];
    107 
    108     std::function<void(int64_t)> mFrameCallback;
    109     std::function<void(int64_t)> mFrameCompleteCallback;
    110 };
    111 
    112 } /* namespace renderthread */
    113 } /* namespace uirenderer */
    114 } /* namespace android */
    115 
    116 #endif /* DRAWFRAMETASK_H */
    117