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 <GLES2/gl2.h>
20
21 #include <utils/Log.h>
22
23 #include "Caches.h"
24 #include "LayerCache.h"
25 #include "Properties.h"
26
27 namespace android {
28 namespace uirenderer {
29
30 ///////////////////////////////////////////////////////////////////////////////
31 // Constructors/destructor
32 ///////////////////////////////////////////////////////////////////////////////
33
LayerCache()34 LayerCache::LayerCache(): mSize(0), mMaxSize(MB(DEFAULT_LAYER_CACHE_SIZE)) {
35 char property[PROPERTY_VALUE_MAX];
36 if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, NULL) > 0) {
37 INIT_LOGD(" Setting layer cache size to %sMB", property);
38 setMaxSize(MB(atof(property)));
39 } else {
40 INIT_LOGD(" Using default layer cache size of %.2fMB", DEFAULT_LAYER_CACHE_SIZE);
41 }
42 }
43
~LayerCache()44 LayerCache::~LayerCache() {
45 clear();
46 }
47
48 ///////////////////////////////////////////////////////////////////////////////
49 // Size management
50 ///////////////////////////////////////////////////////////////////////////////
51
getSize()52 uint32_t LayerCache::getSize() {
53 return mSize;
54 }
55
getMaxSize()56 uint32_t LayerCache::getMaxSize() {
57 return mMaxSize;
58 }
59
setMaxSize(uint32_t maxSize)60 void LayerCache::setMaxSize(uint32_t maxSize) {
61 clear();
62 mMaxSize = maxSize;
63 }
64
65 ///////////////////////////////////////////////////////////////////////////////
66 // Caching
67 ///////////////////////////////////////////////////////////////////////////////
68
compare(const LayerCache::LayerEntry & lhs,const LayerCache::LayerEntry & rhs)69 int LayerCache::LayerEntry::compare(const LayerCache::LayerEntry& lhs,
70 const LayerCache::LayerEntry& rhs) {
71 int deltaInt = int(lhs.mWidth) - int(rhs.mWidth);
72 if (deltaInt != 0) return deltaInt;
73
74 return int(lhs.mHeight) - int(rhs.mHeight);
75 }
76
deleteLayer(Layer * layer)77 void LayerCache::deleteLayer(Layer* layer) {
78 if (layer) {
79 LAYER_LOGD("Destroying layer %dx%d, fbo %d", layer->getWidth(), layer->getHeight(),
80 layer->getFbo());
81 mSize -= layer->getWidth() * layer->getHeight() * 4;
82 Caches::getInstance().resourceCache.decrementRefcount(layer);
83 }
84 }
85
clear()86 void LayerCache::clear() {
87 size_t count = mCache.size();
88 for (size_t i = 0; i < count; i++) {
89 deleteLayer(mCache.itemAt(i).mLayer);
90 }
91 mCache.clear();
92 }
93
get(const uint32_t width,const uint32_t height)94 Layer* LayerCache::get(const uint32_t width, const uint32_t height) {
95 Layer* layer = NULL;
96
97 LayerEntry entry(width, height);
98 ssize_t index = mCache.indexOf(entry);
99
100 if (index >= 0) {
101 entry = mCache.itemAt(index);
102 mCache.removeAt(index);
103
104 layer = entry.mLayer;
105 mSize -= layer->getWidth() * layer->getHeight() * 4;
106
107 LAYER_LOGD("Reusing layer %dx%d", layer->getWidth(), layer->getHeight());
108 } else {
109 LAYER_LOGD("Creating new layer %dx%d", entry.mWidth, entry.mHeight);
110
111 layer = new Layer(entry.mWidth, entry.mHeight);
112 layer->setBlend(true);
113 layer->setEmpty(true);
114 layer->setFbo(0);
115
116 layer->generateTexture();
117 layer->bindTexture();
118 layer->setFilter(GL_NEAREST);
119 layer->setWrap(GL_CLAMP_TO_EDGE, false);
120 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
121
122 #if DEBUG_LAYERS
123 dump();
124 #endif
125 }
126
127 return layer;
128 }
129
dump()130 void LayerCache::dump() {
131 size_t size = mCache.size();
132 for (size_t i = 0; i < size; i++) {
133 const LayerEntry& entry = mCache.itemAt(i);
134 LAYER_LOGD(" Layer size %dx%d", entry.mWidth, entry.mHeight);
135 }
136 }
137
put(Layer * layer)138 bool LayerCache::put(Layer* layer) {
139 if (!layer->isCacheable()) return false;
140
141 const uint32_t size = layer->getWidth() * layer->getHeight() * 4;
142 // Don't even try to cache a layer that's bigger than the cache
143 if (size < mMaxSize) {
144 // TODO: Use an LRU
145 while (mSize + size > mMaxSize) {
146 size_t position = 0;
147 #if LAYER_REMOVE_BIGGEST_FIRST
148 position = mCache.size() - 1;
149 #endif
150 Layer* victim = mCache.itemAt(position).mLayer;
151 deleteLayer(victim);
152 mCache.removeAt(position);
153
154 LAYER_LOGD(" Deleting layer %.2fx%.2f", victim->layer.getWidth(),
155 victim->layer.getHeight());
156 }
157
158 layer->cancelDefer();
159
160 LayerEntry entry(layer);
161
162 mCache.add(entry);
163 mSize += size;
164
165 return true;
166 }
167 return false;
168 }
169
170 }; // namespace uirenderer
171 }; // namespace android
172