DrawFrameTask.h revision 51f2d606dcbfba3cc5b03dfea37c1304b91c232f 
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 "../Rect.h"
28#include "../FrameInfo.h"
29#include "../TreeInfo.h"
30
31namespace android {
32namespace uirenderer {
33
34class DeferredLayerUpdater;
35class DisplayList;
36class RenderNode;
37
38namespace renderthread {
39
40class CanvasContext;
41class RenderThread;
42
43enum SyncResult {
44    kSync_OK = 0,
45    kSync_UIRedrawRequired = 1 << 0,
46    kSync_LostSurfaceRewardIfFound = 1 << 1,
47};
48
49/*
50 * This is a special Super Task. It is re-used multiple times by RenderProxy,
51 * and contains state (such as layer updaters & new DisplayLists) that is
52 * tracked across many frames not just a single frame.
53 * It is the sync-state task, and will kick off the post-sync draw
54 */
55class DrawFrameTask : public RenderTask {
56public:
57    DrawFrameTask();
58    virtual ~DrawFrameTask();
59
60    void setContext(RenderThread* thread, CanvasContext* context, RenderNode* targetNode);
61
62    void pushLayerUpdate(DeferredLayerUpdater* layer);
63    void removeLayerUpdate(DeferredLayerUpdater* layer);
64
65    int drawFrame(TreeObserver* observer);
66
67    int64_t* frameInfo() { return mFrameInfo; }
68
69    virtual void run() override;
70
71private:
72    void postAndWait();
73    bool syncFrameState(TreeInfo& info);
74    void unblockUiThread();
75
76    Mutex mLock;
77    Condition mSignal;
78
79    RenderThread* mRenderThread;
80    CanvasContext* mContext;
81    RenderNode* mTargetNode = nullptr;
82
83    /*********************************************
84     *  Single frame data
85     *********************************************/
86    std::vector< sp<DeferredLayerUpdater> > mLayers;
87
88    int mSyncResult;
89    int64_t mSyncQueued;
90    TreeObserver* mObserver;
91
92    int64_t mFrameInfo[UI_THREAD_FRAME_INFO_SIZE];
93};
94
95} /* namespace renderthread */
96} /* namespace uirenderer */
97} /* namespace android */
98
99#endif /* DRAWFRAMETASK_H */
100