PatchCache.cpp revision 5341cead27070656458750a789ba211a505b57b5 
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
45void PatchCache::clear() {
46    size_t count = mCache.size();
47    for (size_t i = 0; i < count; i++) {
48        delete mCache.valueAt(i);
49    }
50    mCache.clear();
51}
52
53Patch* PatchCache::get(const float bitmapWidth, const float bitmapHeight,
54        const float pixelWidth, const float pixelHeight,
55        const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
56        const uint32_t width, const uint32_t height, const int8_t numColors) {
57
58    int8_t transparentQuads = 0;
59    uint32_t colorKey = 0;
60
61    if (uint8_t(numColors) < sizeof(uint32_t) * 4) {
62        for (int8_t i = 0; i < numColors; i++) {
63            if (colors[i] == 0x0) {
64                transparentQuads++;
65                colorKey |= 0x1 << i;
66            }
67        }
68    }
69
70    // If the 9patch is made of only transparent quads
71    if (transparentQuads == int8_t((width + 1) * (height + 1))) {
72        return NULL;
73    }
74
75    const PatchDescription description(bitmapWidth, bitmapHeight,
76            pixelWidth, pixelHeight, width, height, transparentQuads, colorKey);
77
78    ssize_t index = mCache.indexOfKey(description);
79    Patch* mesh = NULL;
80    if (index >= 0) {
81        mesh = mCache.valueAt(index);
82    }
83
84    if (!mesh) {
85        PATCH_LOGD("New patch mesh "
86                "xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
87                width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
88
89        mesh = new Patch(width, height, transparentQuads);
90        mesh->updateColorKey(colorKey);
91        mesh->copy(xDivs, yDivs);
92        mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
93
94        if (mCache.size() >= mMaxEntries) {
95            delete mCache.valueAt(mCache.size() - 1);
96            mCache.removeItemsAt(mCache.size() - 1, 1);
97        }
98
99        mCache.add(description, mesh);
100    } else if (!mesh->matches(xDivs, yDivs, colorKey, transparentQuads)) {
101        PATCH_LOGD("Patch mesh does not match, refreshing vertices");
102        mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
103    }
104
105    return mesh;
106}
107
108}; // namespace uirenderer
109}; // namespace android
110