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
27 namespace android {
28 namespace uirenderer {
29
30 ///////////////////////////////////////////////////////////////////////////////
31 // Constructors/destructor
32 ///////////////////////////////////////////////////////////////////////////////
33
LayerCache()34 LayerCache::LayerCache(): mSize(0), mMaxSize(MB(DEFAULT_LAYER_CACHE_SIZE)) {
35 char property[PROPERTY_VALUE_MAX];
36 if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, NULL) > 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
~LayerCache()44 LayerCache::~LayerCache() {
45 clear();
46 }
47
48 ///////////////////////////////////////////////////////////////////////////////
49 // Size management
50 ///////////////////////////////////////////////////////////////////////////////
51
getCount()52 size_t LayerCache::getCount() {
53 return mCache.size();
54 }
55
getSize()56 uint32_t LayerCache::getSize() {
57 return mSize;
58 }
59
getMaxSize()60 uint32_t LayerCache::getMaxSize() {
61 return mMaxSize;
62 }
63
setMaxSize(uint32_t maxSize)64 void LayerCache::setMaxSize(uint32_t maxSize) {
65 clear();
66 mMaxSize = maxSize;
67 }
68
69 ///////////////////////////////////////////////////////////////////////////////
70 // Caching
71 ///////////////////////////////////////////////////////////////////////////////
72
compare(const LayerCache::LayerEntry & lhs,const LayerCache::LayerEntry & rhs)73 int 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
deleteLayer(Layer * layer)81 void 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(0);
88 }
89 }
90
clear()91 void 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
get(RenderState & renderState,const uint32_t width,const uint32_t height)99 Layer* LayerCache::get(RenderState& renderState, const uint32_t width, const uint32_t height) {
100 Layer* layer = NULL;
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->setEmpty(true);
120 layer->setFbo(0);
121
122 layer->generateTexture();
123 layer->bindTexture();
124 layer->setFilter(GL_NEAREST);
125 layer->setWrap(GL_CLAMP_TO_EDGE, false);
126 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
127
128 #if DEBUG_LAYERS
129 dump();
130 #endif
131 }
132
133 return layer;
134 }
135
dump()136 void LayerCache::dump() {
137 size_t size = mCache.size();
138 for (size_t i = 0; i < size; i++) {
139 const LayerEntry& entry = mCache.itemAt(i);
140 LAYER_LOGD(" Layer size %dx%d", entry.mWidth, entry.mHeight);
141 }
142 }
143
put(Layer * layer)144 bool LayerCache::put(Layer* layer) {
145 if (!layer->isCacheable()) return false;
146
147 const uint32_t size = layer->getWidth() * layer->getHeight() * 4;
148 // Don't even try to cache a layer that's bigger than the cache
149 if (size < mMaxSize) {
150 // TODO: Use an LRU
151 while (mSize + size > mMaxSize) {
152 size_t position = 0;
153 #if LAYER_REMOVE_BIGGEST_FIRST
154 position = mCache.size() - 1;
155 #endif
156 Layer* victim = mCache.itemAt(position).mLayer;
157 deleteLayer(victim);
158 mCache.removeAt(position);
159
160 LAYER_LOGD(" Deleting layer %.2fx%.2f", victim->layer.getWidth(),
161 victim->layer.getHeight());
162 }
163
164 layer->cancelDefer();
165
166 LayerEntry entry(layer);
167
168 mCache.add(entry);
169 mSize += size;
170
171 layer->state = Layer::kState_InCache;
172 return true;
173 }
174
175 layer->state = Layer::kState_FailedToCache;
176 return false;
177 }
178
179 }; // namespace uirenderer
180 }; // namespace android
181