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
LayerCache()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
~LayerCache()45 LayerCache::~LayerCache() {
46 clear();
47 }
48
49 ///////////////////////////////////////////////////////////////////////////////
50 // Size management
51 ///////////////////////////////////////////////////////////////////////////////
52
getSize()53 uint32_t LayerCache::getSize() {
54 return mSize;
55 }
56
getMaxSize()57 uint32_t LayerCache::getMaxSize() {
58 return mMaxSize;
59 }
60
setMaxSize(uint32_t maxSize)61 void LayerCache::setMaxSize(uint32_t maxSize) {
62 clear();
63 mMaxSize = maxSize;
64 }
65
66 ///////////////////////////////////////////////////////////////////////////////
67 // Caching
68 ///////////////////////////////////////////////////////////////////////////////
69
deleteLayer(Layer * layer)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
clear()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
get(const uint32_t width,const uint32_t height)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
dump()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
resize(Layer * layer,const uint32_t width,const uint32_t height)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
put(Layer * layer)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