ResourceCache.h revision 7953745dd565167113f8cbfc461bc0521d32d870 
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
27namespace android {
28namespace uirenderer {
29
30/**
31 * Type of Resource being cached
32 */
33enum ResourceType {
34    kBitmap,
35    kShader,
36    kColorFilter,
37    kPath,
38};
39
40class ResourceReference {
41public:
42
43    ResourceReference() { refCount = 0; recycled = false; destroyed = false;}
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
54class ANDROID_API ResourceCache {
55    KeyedVector<void *, ResourceReference *>* mCache;
56public:
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);
74private:
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