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
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 : public RenderTask {
59public:
60    DrawFrameTask();
61    virtual ~DrawFrameTask();
62
63    void setContext(RenderThread* thread, CanvasContext* context, RenderNode* targetNode);
64
65    void pushLayerUpdate(DeferredLayerUpdater* layer);
66    void removeLayerUpdate(DeferredLayerUpdater* layer);
67
68    int drawFrame();
69
70    int64_t* frameInfo() { return mFrameInfo; }
71
72    virtual void run() override;
73
74private:
75    void postAndWait();
76    bool syncFrameState(TreeInfo& info);
77    void unblockUiThread();
78
79    Mutex mLock;
80    Condition mSignal;
81
82    RenderThread* mRenderThread;
83    CanvasContext* mContext;
84    RenderNode* mTargetNode = nullptr;
85
86    /*********************************************
87     *  Single frame data
88     *********************************************/
89    std::vector< sp<DeferredLayerUpdater> > mLayers;
90
91    int mSyncResult;
92    int64_t mSyncQueued;
93
94    int64_t mFrameInfo[UI_THREAD_FRAME_INFO_SIZE];
95};
96
97} /* namespace renderthread */
98} /* namespace uirenderer */
99} /* namespace android */
100
101#endif /* DRAWFRAMETASK_H */
102