DrawFrameTask.h revision a5dda645da738da7b4ae15e28fa7d93d3b04b94f 
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 <utils/Condition.h>
20#include <utils/Mutex.h>
21#include <utils/StrongPointer.h>
22#include <utils/Vector.h>
23
24#include "RenderTask.h"
25
26#include "../Rect.h"
27#include "../TreeInfo.h"
28
29namespace android {
30namespace uirenderer {
31
32class DeferredLayerUpdater;
33class DisplayListData;
34class RenderNode;
35
36namespace renderthread {
37
38class CanvasContext;
39class RenderThread;
40
41enum SyncResult {
42    kSync_OK = 0,
43    kSync_UIRedrawRequired = 1 << 1,
44};
45
46/*
47 * This is a special Super Task. It is re-used multiple times by RenderProxy,
48 * and contains state (such as layer updaters & new DisplayListDatas) that is
49 * tracked across many frames not just a single frame.
50 * It is the sync-state task, and will kick off the post-sync draw
51 */
52class DrawFrameTask : public RenderTask {
53public:
54    DrawFrameTask();
55    virtual ~DrawFrameTask();
56
57    void setContext(RenderThread* thread, CanvasContext* context);
58
59    void addLayer(DeferredLayerUpdater* layer);
60    void removeLayer(DeferredLayerUpdater* layer);
61
62    void setDirty(int left, int top, int right, int bottom);
63    int drawFrame(nsecs_t frameTimeNanos);
64
65    virtual void run();
66
67private:
68    void postAndWait();
69    bool syncFrameState(TreeInfo& info);
70    void unblockUiThread();
71
72    Mutex mLock;
73    Condition mSignal;
74
75    RenderThread* mRenderThread;
76    CanvasContext* mContext;
77
78    /*********************************************
79     *  Single frame data
80     *********************************************/
81    Rect mDirty;
82    nsecs_t mFrameTimeNanos;
83
84    int mSyncResult;
85
86    /*********************************************
87     *  Multi frame data
88     *********************************************/
89    Vector<DeferredLayerUpdater*> mLayers;
90};
91
92} /* namespace renderthread */
93} /* namespace uirenderer */
94} /* namespace android */
95
96#endif /* DRAWFRAMETASK_H */
97