DrawFrameTask.h revision 8de65a8e05285df52a1e6f0c1d5616dd233298a7 
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
40/*
41 * This is a special Super Task. It is re-used multiple times by RenderProxy,
42 * and contains state (such as layer updaters & new DisplayListDatas) that is
43 * tracked across many frames not just a single frame.
44 * It is the sync-state task, and will kick off the post-sync draw
45 */
46class DrawFrameTask : public RenderTask {
47public:
48    DrawFrameTask();
49    virtual ~DrawFrameTask();
50
51    void setContext(CanvasContext* context);
52
53    void addLayer(DeferredLayerUpdater* layer);
54    void removeLayer(DeferredLayerUpdater* layer);
55
56    void setRenderNode(RenderNode* renderNode);
57    void setDirty(int left, int top, int right, int bottom);
58    void drawFrame(RenderThread* renderThread);
59    void flushStateChanges(RenderThread* renderThread);
60
61    virtual void run();
62
63private:
64    enum TaskMode {
65        MODE_INVALID,
66        MODE_FULL,
67        MODE_STATE_ONLY,
68    };
69
70    void postAndWait(RenderThread* renderThread, TaskMode mode);
71    void syncFrameState();
72    void unblockUiThread();
73    static void drawRenderNode(CanvasContext* context, RenderNode* renderNode, Rect* dirty);
74
75    // This checks to see if there are any drawGlFunctors which would require
76    // a synchronous drawRenderNode()
77    static bool requiresSynchronousDraw(RenderNode* renderNode);
78
79    Mutex mLock;
80    Condition mSignal;
81
82    CanvasContext* mContext;
83
84    /*********************************************
85     *  Single frame data
86     *********************************************/
87    TaskMode mTaskMode;
88    sp<RenderNode> mRenderNode;
89    Rect mDirty;
90
91    /*********************************************
92     *  Multi frame data
93     *********************************************/
94    Vector<DeferredLayerUpdater*> mLayers;
95};
96
97} /* namespace renderthread */
98} /* namespace uirenderer */
99} /* namespace android */
100
101#endif /* DRAWFRAMETASK_H */
102