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1 /*
2  * Copyright (C) 2010 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 
17 #ifndef ANDROID_HWUI_RESOURCE_CACHE_H
18 #define ANDROID_HWUI_RESOURCE_CACHE_H
19 
20 #include <cutils/compiler.h>
21 
22 #include <SkBitmap.h>
23 #include <SkiaColorFilter.h>
24 #include <SkiaShader.h>
25 #include <utils/KeyedVector.h>
26 
27 namespace android {
28 namespace uirenderer {
29 
30 /**
31  * Type of Resource being cached
32  */
33 enum ResourceType {
34     kBitmap,
35     kShader,
36     kColorFilter,
37     kPath,
38 };
39 
40 class ResourceReference {
41 public:
42 
ResourceReference()43     ResourceReference() { refCount = 0; recycled = false; destroyed = false;}
ResourceReference(ResourceType type)44     ResourceReference(ResourceType type) {
45         refCount = 0; recycled = false; destroyed = false; resourceType = type;
46     }
47 
48     int refCount;
49     bool recycled;
50     bool destroyed;
51     ResourceType resourceType;
52 };
53 
54 class ANDROID_API ResourceCache {
55     KeyedVector<void *, ResourceReference *>* mCache;
56 public:
57     ResourceCache();
58     ~ResourceCache();
59     void incrementRefcount(SkPath* resource);
60     void incrementRefcount(SkBitmap* resource);
61     void incrementRefcount(SkiaShader* resource);
62     void incrementRefcount(SkiaColorFilter* resource);
63     void incrementRefcount(const void* resource, ResourceType resourceType);
64     void decrementRefcount(void* resource);
65     void decrementRefcount(SkBitmap* resource);
66     void decrementRefcount(SkPath* resource);
67     void decrementRefcount(SkiaShader* resource);
68     void decrementRefcount(SkiaColorFilter* resource);
69     void recycle(SkBitmap* resource);
70     void destructor(SkPath* resource);
71     void destructor(SkBitmap* resource);
72     void destructor(SkiaShader* resource);
73     void destructor(SkiaColorFilter* resource);
74 private:
75     void deleteResourceReference(void* resource, ResourceReference* ref);
76     void incrementRefcount(void* resource, ResourceType resourceType);
77     void logCache();
78 
79     /**
80      * Used to increment, decrement, and destroy. Incrementing is generally accessed on the UI
81      * thread, but destroying resources may be called from the GC thread, the finalizer thread,
82      * or a reference queue finalization thread.
83      */
84     mutable Mutex mLock;
85 };
86 
87 }; // namespace uirenderer
88 }; // namespace android
89 
90 #endif // ANDROID_HWUI_RESOURCE_CACHE_H
91