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 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 44 LayerCache::~LayerCache() { 45 clear(); 46 } 47 48 /////////////////////////////////////////////////////////////////////////////// 49 // Size management 50 /////////////////////////////////////////////////////////////////////////////// 51 52 uint32_t LayerCache::getSize() { 53 return mSize; 54 } 55 56 uint32_t LayerCache::getMaxSize() { 57 return mMaxSize; 58 } 59 60 void LayerCache::setMaxSize(uint32_t maxSize) { 61 clear(); 62 mMaxSize = maxSize; 63 } 64 65 /////////////////////////////////////////////////////////////////////////////// 66 // Caching 67 /////////////////////////////////////////////////////////////////////////////// 68 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 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 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 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 } 129 130 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 } 137 138 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
