PatchCache.h revision 3b748a44c6bd2ea05fe16839caf73dbe50bd7ae9 
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_PATCH_CACHE_H
18#define ANDROID_HWUI_PATCH_CACHE_H
19
20#include <GLES2/gl2.h>
21
22#include <utils/LruCache.h>
23
24#include <androidfw/ResourceTypes.h>
25
26#include "AssetAtlas.h"
27#include "Debug.h"
28#include "Patch.h"
29
30namespace android {
31namespace uirenderer {
32
33///////////////////////////////////////////////////////////////////////////////
34// Defines
35///////////////////////////////////////////////////////////////////////////////
36
37// Debug
38#if DEBUG_PATCHES
39    #define PATCH_LOGD(...) ALOGD(__VA_ARGS__)
40#else
41    #define PATCH_LOGD(...)
42#endif
43
44///////////////////////////////////////////////////////////////////////////////
45// Cache
46///////////////////////////////////////////////////////////////////////////////
47
48class Caches;
49
50class PatchCache {
51public:
52    PatchCache();
53    ~PatchCache();
54    void init(Caches& caches);
55
56    const Patch* get(const AssetAtlas::Entry* entry,
57            const uint32_t bitmapWidth, const uint32_t bitmapHeight,
58            const float pixelWidth, const float pixelHeight, const Res_png_9patch* patch);
59    void clear();
60
61    uint32_t getSize() const {
62        return mSize;
63    }
64
65    uint32_t getMaxSize() const {
66        return mMaxSize;
67    }
68
69    GLuint getMeshBuffer() const {
70        return mMeshBuffer;
71    }
72
73private:
74    void clearCache();
75
76    struct PatchDescription {
77        PatchDescription(): mPatch(NULL), mBitmapWidth(0), mBitmapHeight(0),
78                mPixelWidth(0), mPixelHeight(0) {
79        }
80
81        PatchDescription(const uint32_t bitmapWidth, const uint32_t bitmapHeight,
82                const float pixelWidth, const float pixelHeight, const Res_png_9patch* patch):
83                mPatch(patch), mBitmapWidth(bitmapWidth), mBitmapHeight(bitmapHeight),
84                mPixelWidth(pixelWidth), mPixelHeight(pixelHeight) {
85        }
86
87        hash_t hash() const;
88
89        static int compare(const PatchDescription& lhs, const PatchDescription& rhs);
90
91        bool operator==(const PatchDescription& other) const {
92            return compare(*this, other) == 0;
93        }
94
95        bool operator!=(const PatchDescription& other) const {
96            return compare(*this, other) != 0;
97        }
98
99        friend inline int strictly_order_type(const PatchDescription& lhs,
100                const PatchDescription& rhs) {
101            return PatchDescription::compare(lhs, rhs) < 0;
102        }
103
104        friend inline int compare_type(const PatchDescription& lhs,
105                const PatchDescription& rhs) {
106            return PatchDescription::compare(lhs, rhs);
107        }
108
109        friend inline hash_t hash_type(const PatchDescription& entry) {
110            return entry.hash();
111        }
112
113    private:
114        const Res_png_9patch* mPatch;
115        uint32_t mBitmapWidth;
116        uint32_t mBitmapHeight;
117        float mPixelWidth;
118        float mPixelHeight;
119
120    }; // struct PatchDescription
121
122    uint32_t mMaxSize;
123    uint32_t mSize;
124    LruCache<PatchDescription, Patch*> mCache;
125
126    GLuint mMeshBuffer;
127}; // class PatchCache
128
129}; // namespace uirenderer
130}; // namespace android
131
132#endif // ANDROID_HWUI_PATCH_CACHE_H
133