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 RENDERSTATE_H
17 #define RENDERSTATE_H
18 
19 #include "utils/Macros.h"
20 
21 #include <utils/RefBase.h>
22 #include <set>
23 
24 namespace android {
25 namespace uirenderer {
26 
27 class Layer;
28 
29 namespace renderthread {
30 class CacheManager;
31 class RenderThread;
32 }
33 
34 class IGpuContextCallback {
35 public:
36     virtual void onContextDestroyed() = 0;
37 protected:
~IGpuContextCallback()38     virtual ~IGpuContextCallback() {}
39 };
40 
41 // wrapper of Caches for users to migrate to.
42 class RenderState {
43     PREVENT_COPY_AND_ASSIGN(RenderState);
44     friend class renderthread::RenderThread;
45     friend class renderthread::CacheManager;
46 
47 public:
registerContextCallback(IGpuContextCallback * cb)48     void registerContextCallback(IGpuContextCallback* cb) { mContextCallbacks.insert(cb); }
removeContextCallback(IGpuContextCallback * cb)49     void removeContextCallback(IGpuContextCallback* cb) { mContextCallbacks.erase(cb); }
50 
registerLayer(Layer * layer)51     void registerLayer(Layer* layer) { mActiveLayers.insert(layer); }
unregisterLayer(Layer * layer)52     void unregisterLayer(Layer* layer) { mActiveLayers.erase(layer); }
53 
54     // TODO: This system is a little clunky feeling, this could use some
55     // more thinking...
56     void postDecStrong(VirtualLightRefBase* object);
57 
getRenderThread()58     renderthread::RenderThread& getRenderThread() const { return mRenderThread; }
59 
60 private:
61     explicit RenderState(renderthread::RenderThread& thread);
~RenderState()62     ~RenderState() {}
63 
64     // Context notifications are only to be triggered by renderthread::RenderThread
65     void onContextCreated();
66     void onContextDestroyed();
67 
68     std::set<IGpuContextCallback*> mContextCallbacks;
69     std::set<Layer*> mActiveLayers;
70 
71     renderthread::RenderThread& mRenderThread;
72     pthread_t mThreadId;
73 };
74 
75 } /* namespace uirenderer */
76 } /* namespace android */
77 
78 #endif /* RENDERSTATE_H */
79