DrawFrameTask.h revision f9be77940e365036fecd8cc0e491e8545c34e79b 
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
28namespace android {
29namespace uirenderer {
30
31class DeferredLayerUpdater;
32class DisplayListData;
33class RenderNode;
34
35namespace renderthread {
36
37class CanvasContext;
38class RenderThread;
39
40enum SyncResult {
41    kSync_OK = 0,
42    kSync_UIRedrawRequired = 1 << 1,
43};
44
45/*
46 * This is a special Super Task. It is re-used multiple times by RenderProxy,
47 * and contains state (such as layer updaters & new DisplayListDatas) that is
48 * tracked across many frames not just a single frame.
49 * It is the sync-state task, and will kick off the post-sync draw
50 */
51class DrawFrameTask : public RenderTask {
52public:
53    DrawFrameTask();
54    virtual ~DrawFrameTask();
55
56    void setContext(RenderThread* thread, CanvasContext* context);
57
58    void addLayer(DeferredLayerUpdater* layer);
59    void removeLayer(DeferredLayerUpdater* layer);
60
61    void setDirty(int left, int top, int right, int bottom);
62    int drawFrame(nsecs_t frameTimeNanos);
63
64    virtual void run();
65
66private:
67    void postAndWait();
68    bool syncFrameState();
69    void unblockUiThread();
70
71    Mutex mLock;
72    Condition mSignal;
73
74    RenderThread* mRenderThread;
75    CanvasContext* mContext;
76
77    /*********************************************
78     *  Single frame data
79     *********************************************/
80    Rect mDirty;
81    nsecs_t mFrameTimeNanos;
82
83    int mSyncResult;
84
85    /*********************************************
86     *  Multi frame data
87     *********************************************/
88    Vector<DeferredLayerUpdater*> mLayers;
89};
90
91} /* namespace renderthread */
92} /* namespace uirenderer */
93} /* namespace android */
94
95#endif /* DRAWFRAMETASK_H */
96