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 "Debug.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 void LayerCache::deleteLayer(Layer* layer) { 70 if (layer) { 71 LAYER_LOGD("Destroying layer %dx%d", layer->getWidth(), layer->getHeight()); 72 mSize -= layer->getWidth() * layer->getHeight() * 4; 73 layer->deleteFbo(); 74 layer->deleteTexture(); 75 delete layer; 76 } 77 } 78 79 void LayerCache::clear() { 80 size_t count = mCache.size(); 81 for (size_t i = 0; i < count; i++) { 82 deleteLayer(mCache.itemAt(i).mLayer); 83 } 84 mCache.clear(); 85 } 86 87 Layer* LayerCache::get(const uint32_t width, const uint32_t height) { 88 Layer* layer = NULL; 89 90 LayerEntry entry(width, height); 91 ssize_t index = mCache.indexOf(entry); 92 93 if (index >= 0) { 94 entry = mCache.itemAt(index); 95 mCache.removeAt(index); 96 97 layer = entry.mLayer; 98 mSize -= layer->getWidth() * layer->getHeight() * 4; 99 100 LAYER_LOGD("Reusing layer %dx%d", layer->getWidth(), layer->getHeight()); 101 } else { 102 LAYER_LOGD("Creating new layer %dx%d", entry.mWidth, entry.mHeight); 103 104 layer = new Layer(entry.mWidth, entry.mHeight); 105 layer->setBlend(true); 106 layer->setEmpty(true); 107 layer->setFbo(0); 108 109 layer->generateTexture(); 110 layer->bindTexture(); 111 layer->setFilter(GL_NEAREST, GL_NEAREST); 112 layer->setWrap(GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, false); 113 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 114 115 #if DEBUG_LAYERS 116 dump(); 117 #endif 118 } 119 120 return layer; 121 } 122 123 void LayerCache::dump() { 124 size_t size = mCache.size(); 125 for (size_t i = 0; i < size; i++) { 126 const LayerEntry& entry = mCache.itemAt(i); 127 LAYER_LOGD(" Layer size %dx%d", entry.mWidth, entry.mHeight); 128 } 129 } 130 131 bool LayerCache::resize(Layer* layer, const uint32_t width, const uint32_t height) { 132 // TODO: We should be smarter and see if we have a texture of the appropriate 133 // size already in the cache, and reuse it instead of creating a new one 134 135 LayerEntry entry(width, height); 136 if (entry.mWidth <= layer->getWidth() && entry.mHeight <= layer->getHeight()) { 137 return true; 138 } 139 140 uint32_t oldWidth = layer->getWidth(); 141 uint32_t oldHeight = layer->getHeight(); 142 143 glActiveTexture(GL_TEXTURE0); 144 layer->bindTexture(); 145 layer->setSize(entry.mWidth, entry.mHeight); 146 layer->allocateTexture(GL_RGBA, GL_UNSIGNED_BYTE); 147 148 if (glGetError() != GL_NO_ERROR) { 149 layer->setSize(oldWidth, oldHeight); 150 return false; 151 } 152 153 return true; 154 } 155 156 bool LayerCache::put(Layer* layer) { 157 if (!layer->isCacheable()) return false; 158 159 const uint32_t size = layer->getWidth() * layer->getHeight() * 4; 160 // Don't even try to cache a layer that's bigger than the cache 161 if (size < mMaxSize) { 162 // TODO: Use an LRU 163 while (mSize + size > mMaxSize) { 164 size_t position = 0; 165 #if LAYER_REMOVE_BIGGEST_FIRST 166 position = mCache.size() - 1; 167 #endif 168 Layer* victim = mCache.itemAt(position).mLayer; 169 deleteLayer(victim); 170 mCache.removeAt(position); 171 172 LAYER_LOGD(" Deleting layer %.2fx%.2f", victim->layer.getWidth(), 173 victim->layer.getHeight()); 174 } 175 176 LayerEntry entry(layer); 177 178 mCache.add(entry); 179 mSize += size; 180 181 return true; 182 } 183 return false; 184 } 185 186 }; // namespace uirenderer 187 }; // namespace android 188
