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 "Debug.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
getSize()52 uint32_t LayerCache::getSize() {
53 return mSize;
54 }
55
getMaxSize()56 uint32_t LayerCache::getMaxSize() {
57 return mMaxSize;
58 }
59
setMaxSize(uint32_t maxSize)60 void LayerCache::setMaxSize(uint32_t maxSize) {
61 clear();
62 mMaxSize = maxSize;
63 }
64
65 ///////////////////////////////////////////////////////////////////////////////
66 // Caching
67 ///////////////////////////////////////////////////////////////////////////////
68
deleteLayer(Layer * layer)69 void LayerCache::deleteLayer(Layer* layer) {
70 if (layer) {
71 LAYER_LOGD("Destroying layer %dx%d", layer->getWidth(), layer->getHeight());
72 mSize -= layer->getWidth() * layer->getHeight() * 4;
73 layer->deleteFbo();
74 layer->deleteTexture();
75 delete layer;
76 }
77 }
78
clear()79 void 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
get(const uint32_t width,const uint32_t height)87 Layer* 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, GL_NEAREST);
112 layer->setWrap(GL_CLAMP_TO_EDGE, 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
dump()123 void 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
resize(Layer * layer,const uint32_t width,const uint32_t height)131 bool 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 glActiveTexture(GL_TEXTURE0);
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
put(Layer * layer)156 bool 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 LayerEntry entry(layer);
177
178 mCache.add(entry);
179 mSize += size;
180
181 return true;
182 }
183 return false;
184 }
185
186 }; // namespace uirenderer
187 }; // namespace android
188