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 27namespace android { 28namespace uirenderer { 29 30/////////////////////////////////////////////////////////////////////////////// 31// Constructors/destructor 32/////////////////////////////////////////////////////////////////////////////// 33 34LayerCache::LayerCache(): mSize(0), mMaxSize(MB(DEFAULT_LAYER_CACHE_SIZE)) { 35 char property[PROPERTY_VALUE_MAX]; 36 if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, nullptr) > 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 44LayerCache::~LayerCache() { 45 clear(); 46} 47 48/////////////////////////////////////////////////////////////////////////////// 49// Size management 50/////////////////////////////////////////////////////////////////////////////// 51 52size_t LayerCache::getCount() { 53 return mCache.size(); 54} 55 56uint32_t LayerCache::getSize() { 57 return mSize; 58} 59 60uint32_t LayerCache::getMaxSize() { 61 return mMaxSize; 62} 63 64void LayerCache::setMaxSize(uint32_t maxSize) { 65 clear(); 66 mMaxSize = maxSize; 67} 68 69/////////////////////////////////////////////////////////////////////////////// 70// Caching 71/////////////////////////////////////////////////////////////////////////////// 72 73int LayerCache::LayerEntry::compare(const LayerCache::LayerEntry& lhs, 74 const LayerCache::LayerEntry& rhs) { 75 int deltaInt = int(lhs.mWidth) - int(rhs.mWidth); 76 if (deltaInt != 0) return deltaInt; 77 78 return int(lhs.mHeight) - int(rhs.mHeight); 79} 80 81void LayerCache::deleteLayer(Layer* layer) { 82 if (layer) { 83 LAYER_LOGD("Destroying layer %dx%d, fbo %d", layer->getWidth(), layer->getHeight(), 84 layer->getFbo()); 85 mSize -= layer->getWidth() * layer->getHeight() * 4; 86 layer->state = Layer::kState_DeletedFromCache; 87 layer->decStrong(nullptr); 88 } 89} 90 91void LayerCache::clear() { 92 size_t count = mCache.size(); 93 for (size_t i = 0; i < count; i++) { 94 deleteLayer(mCache.itemAt(i).mLayer); 95 } 96 mCache.clear(); 97} 98 99Layer* LayerCache::get(RenderState& renderState, const uint32_t width, const uint32_t height) { 100 Layer* layer = nullptr; 101 102 LayerEntry entry(width, height); 103 ssize_t index = mCache.indexOf(entry); 104 105 if (index >= 0) { 106 entry = mCache.itemAt(index); 107 mCache.removeAt(index); 108 109 layer = entry.mLayer; 110 layer->state = Layer::kState_RemovedFromCache; 111 mSize -= layer->getWidth() * layer->getHeight() * 4; 112 113 LAYER_LOGD("Reusing layer %dx%d", layer->getWidth(), layer->getHeight()); 114 } else { 115 LAYER_LOGD("Creating new layer %dx%d", entry.mWidth, entry.mHeight); 116 117 layer = new Layer(Layer::kType_DisplayList, renderState, entry.mWidth, entry.mHeight); 118 layer->setBlend(true); 119 layer->generateTexture(); 120 layer->bindTexture(); 121 layer->setFilter(GL_NEAREST); 122 layer->setWrap(GL_CLAMP_TO_EDGE, false); 123 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 124 125#if DEBUG_LAYERS 126 dump(); 127#endif 128 } 129 130 return layer; 131} 132 133void LayerCache::dump() { 134 size_t size = mCache.size(); 135 for (size_t i = 0; i < size; i++) { 136 const LayerEntry& entry = mCache.itemAt(i); 137 ALOGD(" Layer size %dx%d", entry.mWidth, entry.mHeight); 138 } 139} 140 141bool LayerCache::put(Layer* layer) { 142 if (!layer->isCacheable()) return false; 143 144 const uint32_t size = layer->getWidth() * layer->getHeight() * 4; 145 // Don't even try to cache a layer that's bigger than the cache 146 if (size < mMaxSize) { 147 // TODO: Use an LRU 148 while (mSize + size > mMaxSize) { 149 size_t position = 0; 150#if LAYER_REMOVE_BIGGEST_FIRST 151 position = mCache.size() - 1; 152#endif 153 Layer* victim = mCache.itemAt(position).mLayer; 154 deleteLayer(victim); 155 mCache.removeAt(position); 156 157 LAYER_LOGD(" Deleting layer %.2fx%.2f", victim->layer.getWidth(), 158 victim->layer.getHeight()); 159 } 160 161 layer->cancelDefer(); 162 163 LayerEntry entry(layer); 164 165 mCache.add(entry); 166 mSize += size; 167 168 layer->state = Layer::kState_InCache; 169 return true; 170 } 171 172 layer->state = Layer::kState_FailedToCache; 173 return false; 174} 175 176}; // namespace uirenderer 177}; // namespace android 178