PatchCache.cpp revision 9935abceea10df337969f08cce05b7c02bb1eb19 
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#define LOG_TAG "OpenGLRenderer"
18
19#include <utils/Log.h>
20
21#include "PatchCache.h"
22#include "Properties.h"
23
24namespace android {
25namespace uirenderer {
26
27///////////////////////////////////////////////////////////////////////////////
28// Constructors/destructor
29///////////////////////////////////////////////////////////////////////////////
30
31PatchCache::PatchCache(): mMaxEntries(DEFAULT_PATCH_CACHE_SIZE) {
32}
33
34PatchCache::PatchCache(uint32_t maxEntries): mMaxEntries(maxEntries) {
35}
36
37PatchCache::~PatchCache() {
38    clear();
39}
40
41///////////////////////////////////////////////////////////////////////////////
42// Caching
43///////////////////////////////////////////////////////////////////////////////
44
45int PatchCache::PatchDescription::compare(
46        const PatchCache::PatchDescription& lhs, const PatchCache::PatchDescription& rhs) {
47    int deltaInt = lhs.bitmapWidth - rhs.bitmapWidth;
48    if (deltaInt != 0) return deltaInt;
49
50    deltaInt = lhs.bitmapHeight - rhs.bitmapHeight;
51    if (deltaInt != 0) return deltaInt;
52
53    if (lhs.pixelWidth < rhs.pixelWidth) return -1;
54    if (lhs.pixelWidth > rhs.pixelWidth) return +1;
55
56    if (lhs.pixelHeight < rhs.pixelHeight) return -1;
57    if (lhs.pixelHeight > rhs.pixelHeight) return +1;
58
59    deltaInt = lhs.xCount - rhs.xCount;
60    if (deltaInt != 0) return deltaInt;
61
62    deltaInt = lhs.yCount - rhs.yCount;
63    if (deltaInt != 0) return deltaInt;
64
65    deltaInt = lhs.emptyCount - rhs.emptyCount;
66    if (deltaInt != 0) return deltaInt;
67
68    deltaInt = lhs.colorKey - rhs.colorKey;
69    if (deltaInt != 0) return deltaInt;
70
71    return 0;
72}
73
74void PatchCache::clear() {
75    size_t count = mCache.size();
76    for (size_t i = 0; i < count; i++) {
77        delete mCache.valueAt(i);
78    }
79    mCache.clear();
80}
81
82Patch* PatchCache::get(const uint32_t bitmapWidth, const uint32_t bitmapHeight,
83        const float pixelWidth, const float pixelHeight,
84        const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
85        const uint32_t width, const uint32_t height, const int8_t numColors) {
86
87    int8_t transparentQuads = 0;
88    uint32_t colorKey = 0;
89
90    if (uint8_t(numColors) < sizeof(uint32_t) * 4) {
91        for (int8_t i = 0; i < numColors; i++) {
92            if (colors[i] == 0x0) {
93                transparentQuads++;
94                colorKey |= 0x1 << i;
95            }
96        }
97    }
98
99    // If the 9patch is made of only transparent quads
100    if (transparentQuads == int8_t((width + 1) * (height + 1))) {
101        return NULL;
102    }
103
104    const PatchDescription description(bitmapWidth, bitmapHeight,
105            pixelWidth, pixelHeight, width, height, transparentQuads, colorKey);
106
107    ssize_t index = mCache.indexOfKey(description);
108    Patch* mesh = NULL;
109    if (index >= 0) {
110        mesh = mCache.valueAt(index);
111    }
112
113    if (!mesh) {
114        PATCH_LOGD("New patch mesh "
115                "xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
116                width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
117
118        mesh = new Patch(width, height, transparentQuads);
119        mesh->updateColorKey(colorKey);
120        mesh->copy(xDivs, yDivs);
121        mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
122
123        if (mCache.size() >= mMaxEntries) {
124            delete mCache.valueAt(mCache.size() - 1);
125            mCache.removeItemsAt(mCache.size() - 1, 1);
126        }
127
128        mCache.add(description, mesh);
129    } else if (!mesh->matches(xDivs, yDivs, colorKey, transparentQuads)) {
130        PATCH_LOGD("Patch mesh does not match, refreshing vertices");
131        mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
132    }
133
134    return mesh;
135}
136
137}; // namespace uirenderer
138}; // namespace android
139