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 "FontRenderer.h"
24 #include "TextDropShadowCache.h"
25 #include "Properties.h"
26
27 namespace android {
28 namespace uirenderer {
29
30 ///////////////////////////////////////////////////////////////////////////////
31 // Cache support
32 ///////////////////////////////////////////////////////////////////////////////
33
hash() const34 hash_t ShadowText::hash() const {
35 uint32_t charCount = len / sizeof(char16_t);
36 uint32_t hash = JenkinsHashMix(0, len);
37 hash = JenkinsHashMix(hash, android::hash_type(radius));
38 hash = JenkinsHashMix(hash, android::hash_type(textSize));
39 hash = JenkinsHashMix(hash, android::hash_type(typeface));
40 hash = JenkinsHashMix(hash, flags);
41 hash = JenkinsHashMix(hash, android::hash_type(italicStyle));
42 hash = JenkinsHashMix(hash, android::hash_type(scaleX));
43 if (text) {
44 hash = JenkinsHashMixShorts(
45 hash, reinterpret_cast<const uint16_t*>(text), charCount);
46 }
47 if (positions) {
48 for (uint32_t i = 0; i < charCount * 2; i++) {
49 hash = JenkinsHashMix(hash, android::hash_type(positions[i]));
50 }
51 }
52 return JenkinsHashWhiten(hash);
53 }
54
compare(const ShadowText & lhs,const ShadowText & rhs)55 int ShadowText::compare(const ShadowText& lhs, const ShadowText& rhs) {
56 int deltaInt = int(lhs.len) - int(rhs.len);
57 if (deltaInt != 0) return deltaInt;
58
59 deltaInt = lhs.flags - rhs.flags;
60 if (deltaInt != 0) return deltaInt;
61
62 if (lhs.radius < rhs.radius) return -1;
63 if (lhs.radius > rhs.radius) return +1;
64
65 if (lhs.typeface < rhs.typeface) return -1;
66 if (lhs.typeface > rhs.typeface) return +1;
67
68 if (lhs.textSize < rhs.textSize) return -1;
69 if (lhs.textSize > rhs.textSize) return +1;
70
71 if (lhs.italicStyle < rhs.italicStyle) return -1;
72 if (lhs.italicStyle > rhs.italicStyle) return +1;
73
74 if (lhs.scaleX < rhs.scaleX) return -1;
75 if (lhs.scaleX > rhs.scaleX) return +1;
76
77 if (lhs.text != rhs.text) {
78 if (!lhs.text) return -1;
79 if (!rhs.text) return +1;
80
81 deltaInt = memcmp(lhs.text, rhs.text, lhs.len);
82 if (deltaInt != 0) return deltaInt;
83 }
84
85 if (lhs.positions != rhs.positions) {
86 if (!lhs.positions) return -1;
87 if (!rhs.positions) return +1;
88
89 return memcmp(lhs.positions, rhs.positions, lhs.len << 2);
90 }
91
92 return 0;
93 }
94
95 ///////////////////////////////////////////////////////////////////////////////
96 // Constructors/destructor
97 ///////////////////////////////////////////////////////////////////////////////
98
TextDropShadowCache()99 TextDropShadowCache::TextDropShadowCache():
100 mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
101 mSize(0), mMaxSize(MB(DEFAULT_DROP_SHADOW_CACHE_SIZE)) {
102 char property[PROPERTY_VALUE_MAX];
103 if (property_get(PROPERTY_DROP_SHADOW_CACHE_SIZE, property, nullptr) > 0) {
104 INIT_LOGD(" Setting drop shadow cache size to %sMB", property);
105 setMaxSize(MB(atof(property)));
106 } else {
107 INIT_LOGD(" Using default drop shadow cache size of %.2fMB",
108 DEFAULT_DROP_SHADOW_CACHE_SIZE);
109 }
110
111 init();
112 }
113
TextDropShadowCache(uint32_t maxByteSize)114 TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize):
115 mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
116 mSize(0), mMaxSize(maxByteSize) {
117 init();
118 }
119
~TextDropShadowCache()120 TextDropShadowCache::~TextDropShadowCache() {
121 mCache.clear();
122 }
123
init()124 void TextDropShadowCache::init() {
125 mCache.setOnEntryRemovedListener(this);
126 mDebugEnabled = Properties::debugLevel & kDebugMoreCaches;
127 }
128
129 ///////////////////////////////////////////////////////////////////////////////
130 // Size management
131 ///////////////////////////////////////////////////////////////////////////////
132
getSize()133 uint32_t TextDropShadowCache::getSize() {
134 return mSize;
135 }
136
getMaxSize()137 uint32_t TextDropShadowCache::getMaxSize() {
138 return mMaxSize;
139 }
140
setMaxSize(uint32_t maxSize)141 void TextDropShadowCache::setMaxSize(uint32_t maxSize) {
142 mMaxSize = maxSize;
143 while (mSize > mMaxSize) {
144 mCache.removeOldest();
145 }
146 }
147
148 ///////////////////////////////////////////////////////////////////////////////
149 // Callbacks
150 ///////////////////////////////////////////////////////////////////////////////
151
operator ()(ShadowText &,ShadowTexture * & texture)152 void TextDropShadowCache::operator()(ShadowText&, ShadowTexture*& texture) {
153 if (texture) {
154 mSize -= texture->bitmapSize;
155
156 if (mDebugEnabled) {
157 ALOGD("Shadow texture deleted, size = %d", texture->bitmapSize);
158 }
159
160 texture->deleteTexture();
161 delete texture;
162 }
163 }
164
165 ///////////////////////////////////////////////////////////////////////////////
166 // Caching
167 ///////////////////////////////////////////////////////////////////////////////
168
clear()169 void TextDropShadowCache::clear() {
170 mCache.clear();
171 }
172
get(const SkPaint * paint,const char * text,uint32_t len,int numGlyphs,float radius,const float * positions)173 ShadowTexture* TextDropShadowCache::get(const SkPaint* paint, const char* text, uint32_t len,
174 int numGlyphs, float radius, const float* positions) {
175 ShadowText entry(paint, radius, len, text, positions);
176 ShadowTexture* texture = mCache.get(entry);
177
178 if (!texture) {
179 SkPaint paintCopy(*paint);
180 paintCopy.setTextAlign(SkPaint::kLeft_Align);
181 FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(&paintCopy, text, 0,
182 len, numGlyphs, radius, positions);
183
184 if (!shadow.image) {
185 return nullptr;
186 }
187
188 Caches& caches = Caches::getInstance();
189
190 texture = new ShadowTexture(caches);
191 texture->left = shadow.penX;
192 texture->top = shadow.penY;
193 texture->width = shadow.width;
194 texture->height = shadow.height;
195 texture->generation = 0;
196 texture->blend = true;
197
198 const uint32_t size = shadow.width * shadow.height;
199 texture->bitmapSize = size;
200
201 // Don't even try to cache a bitmap that's bigger than the cache
202 if (size < mMaxSize) {
203 while (mSize + size > mMaxSize) {
204 mCache.removeOldest();
205 }
206 }
207
208 glGenTextures(1, &texture->id);
209
210 caches.textureState().bindTexture(texture->id);
211 // Textures are Alpha8
212 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
213
214 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
215 GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image);
216
217 texture->setFilter(GL_LINEAR);
218 texture->setWrap(GL_CLAMP_TO_EDGE);
219
220 if (size < mMaxSize) {
221 if (mDebugEnabled) {
222 ALOGD("Shadow texture created, size = %d", texture->bitmapSize);
223 }
224
225 entry.copyTextLocally();
226
227 mSize += size;
228 mCache.put(entry, texture);
229 } else {
230 texture->cleanup = true;
231 }
232
233 // Cleanup shadow
234 free(shadow.image);
235 }
236
237 return texture;
238 }
239
240 }; // namespace uirenderer
241 }; // namespace android
242