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 34 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 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 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 } 113 114 TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize): 115 mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity), 116 mSize(0), mMaxSize(maxByteSize) { 117 init(); 118 } 119 120 TextDropShadowCache::~TextDropShadowCache() { 121 mCache.clear(); 122 } 123 124 void TextDropShadowCache::init() { 125 mCache.setOnEntryRemovedListener(this); 126 mDebugEnabled = Properties::debugLevel & kDebugMoreCaches; 127 } 128 129 /////////////////////////////////////////////////////////////////////////////// 130 // Size management 131 /////////////////////////////////////////////////////////////////////////////// 132 133 uint32_t TextDropShadowCache::getSize() { 134 return mSize; 135 } 136 137 uint32_t TextDropShadowCache::getMaxSize() { 138 return mMaxSize; 139 } 140 141 void TextDropShadowCache::setMaxSize(uint32_t maxSize) { 142 mMaxSize = maxSize; 143 while (mSize > mMaxSize) { 144 mCache.removeOldest(); 145 } 146 } 147 148 /////////////////////////////////////////////////////////////////////////////// 149 // Callbacks 150 /////////////////////////////////////////////////////////////////////////////// 151 152 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 /////////////////////////////////////////////////////////////////////////////// 168 169 void TextDropShadowCache::clear() { 170 mCache.clear(); 171 } 172 173 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
