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 28namespace android { 29namespace uirenderer { 30 31/////////////////////////////////////////////////////////////////////////////// 32// Constructors/destructor 33/////////////////////////////////////////////////////////////////////////////// 34 35LayerCache::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 45LayerCache::~LayerCache() { 46 clear(); 47} 48 49/////////////////////////////////////////////////////////////////////////////// 50// Size management 51/////////////////////////////////////////////////////////////////////////////// 52 53uint32_t LayerCache::getSize() { 54 return mSize; 55} 56 57uint32_t LayerCache::getMaxSize() { 58 return mMaxSize; 59} 60 61void LayerCache::setMaxSize(uint32_t maxSize) { 62 clear(); 63 mMaxSize = maxSize; 64} 65 66/////////////////////////////////////////////////////////////////////////////// 67// Caching 68/////////////////////////////////////////////////////////////////////////////// 69 70void LayerCache::deleteLayer(Layer* layer) { 71 if (layer) { 72 LAYER_LOGD("Destroying layer %dx%d, fbo %d", layer->getWidth(), layer->getHeight(), 73 layer->getFbo()); 74 mSize -= layer->getWidth() * layer->getHeight() * 4; 75 Caches::getInstance().resourceCache.decrementRefcount(layer); 76 } 77} 78 79void 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 87Layer* 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); 112 layer->setWrap(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 123void 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 131bool 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 Caches::getInstance().activeTexture(0); 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 156bool 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 layer->deferredUpdateScheduled = false; 177 layer->renderer = NULL; 178 layer->displayList = NULL; 179 180 LayerEntry entry(layer); 181 182 mCache.add(entry); 183 mSize += size; 184 185 return true; 186 } 187 return false; 188} 189 190}; // namespace uirenderer 191}; // namespace android 192