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 <utils/JenkinsHash.h>
20
21 #include "Caches.h"
22 #include "Debug.h"
23 #include "TextDropShadowCache.h"
24 #include "Properties.h"
25
26 namespace android {
27 namespace uirenderer {
28
29 ///////////////////////////////////////////////////////////////////////////////
30 // Cache support
31 ///////////////////////////////////////////////////////////////////////////////
32
hash() const33 hash_t ShadowText::hash() const {
34 uint32_t charCount = len / sizeof(char16_t);
35 uint32_t hash = JenkinsHashMix(0, len);
36 hash = JenkinsHashMix(hash, android::hash_type(radius));
37 hash = JenkinsHashMix(hash, android::hash_type(textSize));
38 hash = JenkinsHashMix(hash, android::hash_type(typeface));
39 hash = JenkinsHashMix(hash, flags);
40 hash = JenkinsHashMix(hash, android::hash_type(italicStyle));
41 hash = JenkinsHashMix(hash, android::hash_type(scaleX));
42 if (text) {
43 hash = JenkinsHashMixShorts(hash, text, charCount);
44 }
45 if (positions) {
46 for (uint32_t i = 0; i < charCount * 2; i++) {
47 hash = JenkinsHashMix(hash, android::hash_type(positions[i]));
48 }
49 }
50 return JenkinsHashWhiten(hash);
51 }
52
compare(const ShadowText & lhs,const ShadowText & rhs)53 int ShadowText::compare(const ShadowText& lhs, const ShadowText& rhs) {
54 int deltaInt = int(lhs.len) - int(rhs.len);
55 if (deltaInt != 0) return deltaInt;
56
57 deltaInt = lhs.flags - rhs.flags;
58 if (deltaInt != 0) return deltaInt;
59
60 if (lhs.radius < rhs.radius) return -1;
61 if (lhs.radius > rhs.radius) return +1;
62
63 if (lhs.typeface < rhs.typeface) return -1;
64 if (lhs.typeface > rhs.typeface) return +1;
65
66 if (lhs.textSize < rhs.textSize) return -1;
67 if (lhs.textSize > rhs.textSize) return +1;
68
69 if (lhs.italicStyle < rhs.italicStyle) return -1;
70 if (lhs.italicStyle > rhs.italicStyle) return +1;
71
72 if (lhs.scaleX < rhs.scaleX) return -1;
73 if (lhs.scaleX > rhs.scaleX) return +1;
74
75 if (lhs.text != rhs.text) {
76 if (!lhs.text) return -1;
77 if (!rhs.text) return +1;
78
79 deltaInt = memcmp(lhs.text, rhs.text, lhs.len);
80 if (deltaInt != 0) return deltaInt;
81 }
82
83 if (lhs.positions != rhs.positions) {
84 if (!lhs.positions) return -1;
85 if (!rhs.positions) return +1;
86
87 return memcmp(lhs.positions, rhs.positions, lhs.len << 2);
88 }
89
90 return 0;
91 }
92
93 ///////////////////////////////////////////////////////////////////////////////
94 // Constructors/destructor
95 ///////////////////////////////////////////////////////////////////////////////
96
TextDropShadowCache()97 TextDropShadowCache::TextDropShadowCache():
98 mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
99 mSize(0), mMaxSize(MB(DEFAULT_DROP_SHADOW_CACHE_SIZE)) {
100 char property[PROPERTY_VALUE_MAX];
101 if (property_get(PROPERTY_DROP_SHADOW_CACHE_SIZE, property, NULL) > 0) {
102 INIT_LOGD(" Setting drop shadow cache size to %sMB", property);
103 setMaxSize(MB(atof(property)));
104 } else {
105 INIT_LOGD(" Using default drop shadow cache size of %.2fMB",
106 DEFAULT_DROP_SHADOW_CACHE_SIZE);
107 }
108
109 init();
110 }
111
TextDropShadowCache(uint32_t maxByteSize)112 TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize):
113 mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
114 mSize(0), mMaxSize(maxByteSize) {
115 init();
116 }
117
~TextDropShadowCache()118 TextDropShadowCache::~TextDropShadowCache() {
119 mCache.clear();
120 }
121
init()122 void TextDropShadowCache::init() {
123 mCache.setOnEntryRemovedListener(this);
124 mDebugEnabled = readDebugLevel() & kDebugMoreCaches;
125 }
126
127 ///////////////////////////////////////////////////////////////////////////////
128 // Size management
129 ///////////////////////////////////////////////////////////////////////////////
130
getSize()131 uint32_t TextDropShadowCache::getSize() {
132 return mSize;
133 }
134
getMaxSize()135 uint32_t TextDropShadowCache::getMaxSize() {
136 return mMaxSize;
137 }
138
setMaxSize(uint32_t maxSize)139 void TextDropShadowCache::setMaxSize(uint32_t maxSize) {
140 mMaxSize = maxSize;
141 while (mSize > mMaxSize) {
142 mCache.removeOldest();
143 }
144 }
145
146 ///////////////////////////////////////////////////////////////////////////////
147 // Callbacks
148 ///////////////////////////////////////////////////////////////////////////////
149
operator ()(ShadowText &,ShadowTexture * & texture)150 void TextDropShadowCache::operator()(ShadowText&, ShadowTexture*& texture) {
151 if (texture) {
152 mSize -= texture->bitmapSize;
153
154 if (mDebugEnabled) {
155 ALOGD("Shadow texture deleted, size = %d", texture->bitmapSize);
156 }
157
158 texture->deleteTexture();
159 delete texture;
160 }
161 }
162
163 ///////////////////////////////////////////////////////////////////////////////
164 // Caching
165 ///////////////////////////////////////////////////////////////////////////////
166
clear()167 void TextDropShadowCache::clear() {
168 mCache.clear();
169 }
170
get(const SkPaint * paint,const char * text,uint32_t len,int numGlyphs,float radius,const float * positions)171 ShadowTexture* TextDropShadowCache::get(const SkPaint* paint, const char* text, uint32_t len,
172 int numGlyphs, float radius, const float* positions) {
173 ShadowText entry(paint, radius, len, text, positions);
174 ShadowTexture* texture = mCache.get(entry);
175
176 if (!texture) {
177 SkPaint paintCopy(*paint);
178 paintCopy.setTextAlign(SkPaint::kLeft_Align);
179 FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(&paintCopy, text, 0,
180 len, numGlyphs, radius, positions);
181
182 if (!shadow.image) {
183 return NULL;
184 }
185
186 Caches& caches = Caches::getInstance();
187
188 texture = new ShadowTexture(caches);
189 texture->left = shadow.penX;
190 texture->top = shadow.penY;
191 texture->width = shadow.width;
192 texture->height = shadow.height;
193 texture->generation = 0;
194 texture->blend = true;
195
196 const uint32_t size = shadow.width * shadow.height;
197 texture->bitmapSize = size;
198
199 // Don't even try to cache a bitmap that's bigger than the cache
200 if (size < mMaxSize) {
201 while (mSize + size > mMaxSize) {
202 mCache.removeOldest();
203 }
204 }
205
206 glGenTextures(1, &texture->id);
207
208 caches.bindTexture(texture->id);
209 // Textures are Alpha8
210 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
211
212 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
213 GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image);
214
215 texture->setFilter(GL_LINEAR);
216 texture->setWrap(GL_CLAMP_TO_EDGE);
217
218 if (size < mMaxSize) {
219 if (mDebugEnabled) {
220 ALOGD("Shadow texture created, size = %d", texture->bitmapSize);
221 }
222
223 entry.copyTextLocally();
224
225 mSize += size;
226 mCache.put(entry, texture);
227 } else {
228 texture->cleanup = true;
229 }
230
231 // Cleanup shadow
232 free(shadow.image);
233 }
234
235 return texture;
236 }
237
238 }; // namespace uirenderer
239 }; // namespace android
240