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 "Debug.h" 25 #include "LayerCache.h" 26 #include "Properties.h" 27 28 namespace android { 29 namespace uirenderer { 30 31 /////////////////////////////////////////////////////////////////////////////// 32 // Constructors/destructor 33 /////////////////////////////////////////////////////////////////////////////// 34 35 LayerCache::LayerCache(): mSize(0), mMaxSize(MB(DEFAULT_LAYER_CACHE_SIZE)) { 36 char property[PROPERTY_VALUE_MAX]; 37 if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, NULL) > 0) { 38 INIT_LOGD(" Setting layer cache size to %sMB", property); 39 setMaxSize(MB(atof(property))); 40 } else { 41 INIT_LOGD(" Using default layer cache size of %.2fMB", DEFAULT_LAYER_CACHE_SIZE); 42 } 43 } 44 45 LayerCache::~LayerCache() { 46 clear(); 47 } 48 49 /////////////////////////////////////////////////////////////////////////////// 50 // Size management 51 /////////////////////////////////////////////////////////////////////////////// 52 53 uint32_t LayerCache::getSize() { 54 return mSize; 55 } 56 57 uint32_t LayerCache::getMaxSize() { 58 return mMaxSize; 59 } 60 61 void LayerCache::setMaxSize(uint32_t maxSize) { 62 clear(); 63 mMaxSize = maxSize; 64 } 65 66 /////////////////////////////////////////////////////////////////////////////// 67 // Caching 68 /////////////////////////////////////////////////////////////////////////////// 69 70 void LayerCache::deleteLayer(Layer* layer) { 71 if (layer) { 72 GLuint fbo = layer->getFbo(); 73 LAYER_LOGD("Destroying layer %dx%d, fbo %d", layer->getWidth(), layer->getHeight(), fbo); 74 75 mSize -= layer->getWidth() * layer->getHeight() * 4; 76 77 if (fbo) Caches::getInstance().fboCache.put(fbo); 78 layer->deleteTexture(); 79 80 delete layer; 81 } 82 } 83 84 void LayerCache::clear() { 85 size_t count = mCache.size(); 86 for (size_t i = 0; i < count; i++) { 87 deleteLayer(mCache.itemAt(i).mLayer); 88 } 89 mCache.clear(); 90 } 91 92 Layer* LayerCache::get(const uint32_t width, const uint32_t height) { 93 Layer* layer = NULL; 94 95 LayerEntry entry(width, height); 96 ssize_t index = mCache.indexOf(entry); 97 98 if (index >= 0) { 99 entry = mCache.itemAt(index); 100 mCache.removeAt(index); 101 102 layer = entry.mLayer; 103 mSize -= layer->getWidth() * layer->getHeight() * 4; 104 105 LAYER_LOGD("Reusing layer %dx%d", layer->getWidth(), layer->getHeight()); 106 } else { 107 LAYER_LOGD("Creating new layer %dx%d", entry.mWidth, entry.mHeight); 108 109 layer = new Layer(entry.mWidth, entry.mHeight); 110 layer->setBlend(true); 111 layer->setEmpty(true); 112 layer->setFbo(0); 113 114 layer->generateTexture(); 115 layer->bindTexture(); 116 layer->setFilter(GL_NEAREST); 117 layer->setWrap(GL_CLAMP_TO_EDGE, false); 118 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 119 120 #if DEBUG_LAYERS 121 dump(); 122 #endif 123 } 124 125 return layer; 126 } 127 128 void LayerCache::dump() { 129 size_t size = mCache.size(); 130 for (size_t i = 0; i < size; i++) { 131 const LayerEntry& entry = mCache.itemAt(i); 132 LAYER_LOGD(" Layer size %dx%d", entry.mWidth, entry.mHeight); 133 } 134 } 135 136 bool LayerCache::resize(Layer* layer, const uint32_t width, const uint32_t height) { 137 // TODO: We should be smarter and see if we have a texture of the appropriate 138 // size already in the cache, and reuse it instead of creating a new one 139 140 LayerEntry entry(width, height); 141 if (entry.mWidth <= layer->getWidth() && entry.mHeight <= layer->getHeight()) { 142 return true; 143 } 144 145 uint32_t oldWidth = layer->getWidth(); 146 uint32_t oldHeight = layer->getHeight(); 147 148 Caches::getInstance().activeTexture(0); 149 layer->bindTexture(); 150 layer->setSize(entry.mWidth, entry.mHeight); 151 layer->allocateTexture(GL_RGBA, GL_UNSIGNED_BYTE); 152 153 if (glGetError() != GL_NO_ERROR) { 154 layer->setSize(oldWidth, oldHeight); 155 return false; 156 } 157 158 return true; 159 } 160 161 bool LayerCache::put(Layer* layer) { 162 if (!layer->isCacheable()) return false; 163 164 const uint32_t size = layer->getWidth() * layer->getHeight() * 4; 165 // Don't even try to cache a layer that's bigger than the cache 166 if (size < mMaxSize) { 167 // TODO: Use an LRU 168 while (mSize + size > mMaxSize) { 169 size_t position = 0; 170 #if LAYER_REMOVE_BIGGEST_FIRST 171 position = mCache.size() - 1; 172 #endif 173 Layer* victim = mCache.itemAt(position).mLayer; 174 deleteLayer(victim); 175 mCache.removeAt(position); 176 177 LAYER_LOGD(" Deleting layer %.2fx%.2f", victim->layer.getWidth(), 178 victim->layer.getHeight()); 179 } 180 181 layer->deferredUpdateScheduled = false; 182 layer->renderer = NULL; 183 layer->displayList = NULL; 184 185 LayerEntry entry(layer); 186 187 mCache.add(entry); 188 mSize += size; 189 190 return true; 191 } 192 return false; 193 } 194 195 }; // namespace uirenderer 196 }; // namespace android 197
