DrawFrameTask.h revision 9568800d90e917e28ae2bc4ae1ca5dcaaf60675b 
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
31namespace android {
32namespace uirenderer {
33
34class DeferredLayerUpdater;
35class DisplayList;
36class RenderNode;
37
38namespace renderthread {
39
40class CanvasContext;
41class RenderThread;
42
43namespace SyncResult {
44enum {
45    OK = 0,
46    UIRedrawRequired = 1 << 0,
47    LostSurfaceRewardIfFound = 1 << 1,
48    ContextIsStopped = 1 << 2,
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 */
58class DrawFrameTask {
59public:
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
81private:
82    void postAndWait();
83    bool syncFrameState(TreeInfo& info);
84    void unblockUiThread();
85
86    Mutex mLock;
87    Condition mSignal;
88
89    RenderThread* mRenderThread;
90    CanvasContext* mContext;
91    RenderNode* mTargetNode = nullptr;
92    Rect mContentDrawBounds;
93
94    /*********************************************
95     *  Single frame data
96     *********************************************/
97    std::vector<sp<DeferredLayerUpdater> > mLayers;
98
99    int mSyncResult;
100    int64_t mSyncQueued;
101
102    int64_t mFrameInfo[UI_THREAD_FRAME_INFO_SIZE];
103
104    std::function<void(int64_t)> mFrameCallback;
105};
106
107} /* namespace renderthread */
108} /* namespace uirenderer */
109} /* namespace android */
110
111#endif /* DRAWFRAMETASK_H */
112