PatchCache.h revision 13ba0054846ce630ca31e8f26169fd9388faee02 
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 <utils/KeyedVector.h>
21
22#include "Debug.h"
23#include "Patch.h"
24
25namespace android {
26namespace uirenderer {
27
28///////////////////////////////////////////////////////////////////////////////
29// Defines
30///////////////////////////////////////////////////////////////////////////////
31
32// Debug
33#if DEBUG_PATCHES
34    #define PATCH_LOGD(...) ALOGD(__VA_ARGS__)
35#else
36    #define PATCH_LOGD(...)
37#endif
38
39///////////////////////////////////////////////////////////////////////////////
40// Cache
41///////////////////////////////////////////////////////////////////////////////
42
43class PatchCache {
44public:
45    PatchCache();
46    PatchCache(uint32_t maxCapacity);
47    ~PatchCache();
48
49    Patch* get(const uint32_t bitmapWidth, const uint32_t bitmapHeight,
50            const float pixelWidth, const float pixelHeight,
51            const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
52            const uint32_t width, const uint32_t height, const int8_t numColors);
53    void clear();
54
55    uint32_t getSize() const {
56        return mCache.size();
57    }
58
59    uint32_t getMaxSize() const {
60        return mMaxEntries;
61    }
62
63private:
64    /**
65     * Description of a patch.
66     */
67    struct PatchDescription {
68        PatchDescription(): bitmapWidth(0), bitmapHeight(0), pixelWidth(0), pixelHeight(0),
69                xCount(0), yCount(0), emptyCount(0), colorKey(0) {
70        }
71
72        PatchDescription(const uint32_t bitmapWidth, const uint32_t bitmapHeight,
73                const float pixelWidth, const float pixelHeight,
74                const uint32_t xCount, const uint32_t yCount,
75                const int8_t emptyCount, const uint32_t colorKey):
76                bitmapWidth(bitmapWidth), bitmapHeight(bitmapHeight),
77                pixelWidth(pixelWidth), pixelHeight(pixelHeight),
78                xCount(xCount), yCount(yCount),
79                emptyCount(emptyCount), colorKey(colorKey) {
80        }
81
82        static int compare(const PatchDescription& lhs, const PatchDescription& rhs);
83
84        bool operator==(const PatchDescription& other) const {
85            return compare(*this, other) == 0;
86        }
87
88        bool operator!=(const PatchDescription& other) const {
89            return compare(*this, other) != 0;
90        }
91
92        friend inline int strictly_order_type(const PatchDescription& lhs,
93                const PatchDescription& rhs) {
94            return PatchDescription::compare(lhs, rhs) < 0;
95        }
96
97        friend inline int compare_type(const PatchDescription& lhs,
98                const PatchDescription& rhs) {
99            return PatchDescription::compare(lhs, rhs);
100        }
101
102    private:
103        uint32_t bitmapWidth;
104        uint32_t bitmapHeight;
105        float pixelWidth;
106        float pixelHeight;
107        uint32_t xCount;
108        uint32_t yCount;
109        int8_t emptyCount;
110        uint32_t colorKey;
111
112    }; // struct PatchDescription
113
114    uint32_t mMaxEntries;
115    KeyedVector<PatchDescription, Patch*> mCache;
116
117}; // class PatchCache
118
119}; // namespace uirenderer
120}; // namespace android
121
122#endif // ANDROID_HWUI_PATCH_CACHE_H
123