LayerCache.cpp revision eb99356a0548684a501766e6a524529ab93304c8
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 "LayerCache.h" 24#include "Properties.h" 25 26namespace android { 27namespace uirenderer { 28 29/////////////////////////////////////////////////////////////////////////////// 30// Constructors/destructor 31/////////////////////////////////////////////////////////////////////////////// 32 33LayerCache::LayerCache(): 34 mCache(GenerationCache<LayerSize, Layer*>::kUnlimitedCapacity), 35 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 LOGD(" Setting layer cache size to %sMB", property); 39 setMaxSize(MB(atof(property))); 40 } else { 41 LOGD(" Using default layer cache size of %.2fMB", DEFAULT_LAYER_CACHE_SIZE); 42 } 43} 44 45LayerCache::LayerCache(uint32_t maxByteSize): 46 mCache(GenerationCache<LayerSize, Layer*>::kUnlimitedCapacity), 47 mSize(0), mMaxSize(maxByteSize) { 48} 49 50LayerCache::~LayerCache() { 51 clear(); 52} 53 54/////////////////////////////////////////////////////////////////////////////// 55// Size management 56/////////////////////////////////////////////////////////////////////////////// 57 58uint32_t LayerCache::getSize() { 59 return mSize; 60} 61 62uint32_t LayerCache::getMaxSize() { 63 return mMaxSize; 64} 65 66void LayerCache::setMaxSize(uint32_t maxSize) { 67 mMaxSize = maxSize; 68 while (mSize > mMaxSize) { 69 Layer* oldest = mCache.removeOldest(); 70 deleteLayer(oldest); 71 } 72} 73 74/////////////////////////////////////////////////////////////////////////////// 75// Callbacks 76/////////////////////////////////////////////////////////////////////////////// 77 78void LayerCache::operator()(LayerSize& size, Layer*& layer) { 79 deleteLayer(layer); 80} 81 82/////////////////////////////////////////////////////////////////////////////// 83// Caching 84/////////////////////////////////////////////////////////////////////////////// 85 86void LayerCache::deleteLayer(Layer* layer) { 87 if (layer) { 88 mSize -= layer->layer.getWidth() * layer->layer.getHeight() * 4; 89 90 glDeleteTextures(1, &layer->texture); 91 delete layer; 92 } 93} 94 95void LayerCache::clear() { 96 mCache.setOnEntryRemovedListener(this); 97 mCache.clear(); 98 mCache.setOnEntryRemovedListener(NULL); 99} 100 101Layer* LayerCache::get(LayerSize& size) { 102 Layer* layer = mCache.remove(size); 103 if (layer) { 104 LAYER_LOGD("Reusing layer"); 105 106 mSize -= layer->layer.getWidth() * layer->layer.getHeight() * 4; 107 } else { 108 LAYER_LOGD("Creating new layer"); 109 110 layer = new Layer; 111 layer->blend = true; 112 layer->empty = true; 113 layer->fbo = 0; 114 115 glGenTextures(1, &layer->texture); 116 glBindTexture(GL_TEXTURE_2D, layer->texture); 117 118 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 119 120 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 121 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 122 123 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 124 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 125 126#if DEBUG_LAYERS 127 uint32_t size = mCache.size(); 128 for (uint32_t i = 0; i < size; i++) { 129 LayerSize ls = mCache.getKeyAt(i); 130 LAYER_LOGD(" Layer size %dx%d", ls.width, ls.height); 131 } 132#endif 133 } 134 135 return layer; 136} 137 138bool LayerCache::put(LayerSize& layerSize, Layer* layer) { 139 const uint32_t size = layerSize.width * layerSize.height * 4; 140 // Don't even try to cache a layer that's bigger than the cache 141 if (size < mMaxSize) { 142 while (mSize + size > mMaxSize) { 143 Layer* oldest = mCache.removeOldest(); 144 deleteLayer(oldest); 145 LAYER_LOGD(" Deleting layer %.2fx%.2f", oldest->layer.getWidth(), 146 oldest->layer.getHeight()); 147 } 148 149 mCache.put(layerSize, layer); 150 mSize += size; 151 152 return true; 153 } 154 return false; 155} 156 157}; // namespace uirenderer 158}; // namespace android 159