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| 1 /* | |
| 2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. | |
| 3 * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com> | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
| 15 * its contributors may be used to endorse or promote products derived | |
| 16 * from this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 28 */ | |
| 29 | |
| 30 #include "config.h" | |
| 31 #include "core/platform/graphics/FontCache.h" | |
| 32 | |
| 33 #include "FontFamilyNames.h" | |
| 34 | |
| 35 #include "RuntimeEnabledFeatures.h" | |
| 36 #include "core/platform/graphics/FontDataCache.h" | |
| 37 #include "core/platform/graphics/FontFallbackList.h" | |
| 38 #include "core/platform/graphics/FontPlatformData.h" | |
| 39 #include "core/platform/graphics/opentype/OpenTypeVerticalData.h" | |
| 40 #include "platform/fonts/AlternateFontFamily.h" | |
| 41 #include "platform/fonts/FontCacheKey.h" | |
| 42 #include "platform/fonts/FontDescription.h" | |
| 43 #include "platform/fonts/FontSelector.h" | |
| 44 #include "platform/fonts/FontSmoothingMode.h" | |
| 45 #include "platform/fonts/TextRenderingMode.h" | |
| 46 #include "wtf/HashMap.h" | |
| 47 #include "wtf/ListHashSet.h" | |
| 48 #include "wtf/StdLibExtras.h" | |
| 49 #include "wtf/text/AtomicStringHash.h" | |
| 50 #include "wtf/text/StringHash.h" | |
| 51 | |
| 52 using namespace WTF; | |
| 53 | |
| 54 namespace WebCore { | |
| 55 | |
| 56 FontCache* fontCache() | |
| 57 { | |
| 58 DEFINE_STATIC_LOCAL(FontCache, globalFontCache, ()); | |
| 59 return &globalFontCache; | |
| 60 } | |
| 61 | |
| 62 #if !OS(WIN) || ENABLE(GDI_FONTS_ON_WINDOWS) | |
| 63 FontCache::FontCache() | |
| 64 : m_purgePreventCount(0) | |
| 65 { | |
| 66 } | |
| 67 #endif // !OS(WIN) || ENABLE(GDI_FONTS_ON_WINDOWS) | |
| 68 | |
| 69 typedef HashMap<FontCacheKey, OwnPtr<FontPlatformData>, FontCacheKeyHash, FontCa
cheKeyTraits> FontPlatformDataCache; | |
| 70 | |
| 71 static FontPlatformDataCache* gFontPlatformDataCache = 0; | |
| 72 | |
| 73 FontPlatformData* FontCache::getFontPlatformData(const FontDescription& fontDesc
ription, | |
| 74 const AtomicString& passedFamilyName, bool checkingAlternateName) | |
| 75 { | |
| 76 #if OS(WIN) && ENABLE(OPENTYPE_VERTICAL) | |
| 77 // Leading "@" in the font name enables Windows vertical flow flag for the f
ont. | |
| 78 // Because we do vertical flow by ourselves, we don't want to use the Window
s feature. | |
| 79 // IE disregards "@" regardless of the orientatoin, so we follow the behavio
r. | |
| 80 const AtomicString& familyName = (passedFamilyName.isEmpty() || passedFamily
Name[0] != '@') ? | |
| 81 passedFamilyName : AtomicString(passedFamilyName.impl()->substring(1)); | |
| 82 #else | |
| 83 const AtomicString& familyName = passedFamilyName; | |
| 84 #endif | |
| 85 | |
| 86 if (!gFontPlatformDataCache) { | |
| 87 gFontPlatformDataCache = new FontPlatformDataCache; | |
| 88 platformInit(); | |
| 89 } | |
| 90 | |
| 91 FontCacheKey key = fontDescription.cacheKey(familyName); | |
| 92 FontPlatformData* result = 0; | |
| 93 bool foundResult; | |
| 94 FontPlatformDataCache::iterator it = gFontPlatformDataCache->find(key); | |
| 95 if (it == gFontPlatformDataCache->end()) { | |
| 96 result = createFontPlatformData(fontDescription, familyName, fontDescrip
tion.effectiveFontSize()); | |
| 97 gFontPlatformDataCache->set(key, adoptPtr(result)); | |
| 98 foundResult = result; | |
| 99 } else { | |
| 100 result = it->value.get(); | |
| 101 foundResult = true; | |
| 102 } | |
| 103 | |
| 104 if (!foundResult && !checkingAlternateName) { | |
| 105 // We were unable to find a font. We have a small set of fonts that we a
lias to other names, | |
| 106 // e.g., Arial/Helvetica, Courier/Courier New, etc. Try looking up the f
ont under the aliased name. | |
| 107 const AtomicString& alternateName = alternateFamilyName(familyName); | |
| 108 if (!alternateName.isEmpty()) | |
| 109 result = getFontPlatformData(fontDescription, alternateName, true); | |
| 110 if (result) | |
| 111 gFontPlatformDataCache->set(key, adoptPtr(new FontPlatformData(*resu
lt))); // Cache the result under the old name. | |
| 112 } | |
| 113 | |
| 114 return result; | |
| 115 } | |
| 116 | |
| 117 #if ENABLE(OPENTYPE_VERTICAL) | |
| 118 typedef HashMap<FontCache::FontFileKey, RefPtr<OpenTypeVerticalData>, WTF::IntHa
sh<FontCache::FontFileKey>, WTF::UnsignedWithZeroKeyHashTraits<FontCache::FontFi
leKey> > FontVerticalDataCache; | |
| 119 | |
| 120 FontVerticalDataCache& fontVerticalDataCacheInstance() | |
| 121 { | |
| 122 DEFINE_STATIC_LOCAL(FontVerticalDataCache, fontVerticalDataCache, ()); | |
| 123 return fontVerticalDataCache; | |
| 124 } | |
| 125 | |
| 126 PassRefPtr<OpenTypeVerticalData> FontCache::getVerticalData(const FontFileKey& k
ey, const FontPlatformData& platformData) | |
| 127 { | |
| 128 FontVerticalDataCache& fontVerticalDataCache = fontVerticalDataCacheInstance
(); | |
| 129 FontVerticalDataCache::iterator result = fontVerticalDataCache.find(key); | |
| 130 if (result != fontVerticalDataCache.end()) | |
| 131 return result.get()->value; | |
| 132 | |
| 133 RefPtr<OpenTypeVerticalData> verticalData = OpenTypeVerticalData::create(pla
tformData); | |
| 134 if (!verticalData->isOpenType()) | |
| 135 verticalData.clear(); | |
| 136 fontVerticalDataCache.set(key, verticalData); | |
| 137 return verticalData; | |
| 138 } | |
| 139 #endif | |
| 140 | |
| 141 static FontDataCache* gFontDataCache = 0; | |
| 142 | |
| 143 PassRefPtr<SimpleFontData> FontCache::getFontData(const FontDescription& fontDes
cription, const AtomicString& family, bool checkingAlternateName, ShouldRetain s
houldRetain) | |
| 144 { | |
| 145 if (FontPlatformData* platformData = getFontPlatformData(fontDescription, ad
justFamilyNameToAvoidUnsupportedFonts(family), checkingAlternateName)) | |
| 146 return fontDataFromFontPlatformData(platformData, shouldRetain); | |
| 147 | |
| 148 return 0; | |
| 149 } | |
| 150 | |
| 151 PassRefPtr<SimpleFontData> FontCache::fontDataFromFontPlatformData(const FontPla
tformData* platformData, ShouldRetain shouldRetain) | |
| 152 { | |
| 153 if (!gFontDataCache) | |
| 154 gFontDataCache = new FontDataCache; | |
| 155 | |
| 156 #if !ASSERT_DISABLED | |
| 157 if (shouldRetain == DoNotRetain) | |
| 158 ASSERT(m_purgePreventCount); | |
| 159 #endif | |
| 160 | |
| 161 return gFontDataCache->get(platformData, shouldRetain); | |
| 162 } | |
| 163 | |
| 164 bool FontCache::isPlatformFontAvailable(const FontDescription& fontDescription,
const AtomicString& family) | |
| 165 { | |
| 166 bool checkingAlternateName = true; | |
| 167 return getFontPlatformData(fontDescription, family, checkingAlternateName); | |
| 168 } | |
| 169 | |
| 170 SimpleFontData* FontCache::getNonRetainedLastResortFallbackFont(const FontDescri
ption& fontDescription) | |
| 171 { | |
| 172 return getLastResortFallbackFont(fontDescription, DoNotRetain).leakRef(); | |
| 173 } | |
| 174 | |
| 175 void FontCache::releaseFontData(const SimpleFontData* fontData) | |
| 176 { | |
| 177 ASSERT(gFontDataCache); | |
| 178 | |
| 179 gFontDataCache->release(fontData); | |
| 180 } | |
| 181 | |
| 182 static inline void purgePlatformFontDataCache() | |
| 183 { | |
| 184 if (!gFontPlatformDataCache) | |
| 185 return; | |
| 186 | |
| 187 Vector<FontCacheKey> keysToRemove; | |
| 188 keysToRemove.reserveInitialCapacity(gFontPlatformDataCache->size()); | |
| 189 FontPlatformDataCache::iterator platformDataEnd = gFontPlatformDataCache->en
d(); | |
| 190 for (FontPlatformDataCache::iterator platformData = gFontPlatformDataCache->
begin(); platformData != platformDataEnd; ++platformData) { | |
| 191 if (platformData->value && !gFontDataCache->contains(platformData->value
.get())) | |
| 192 keysToRemove.append(platformData->key); | |
| 193 } | |
| 194 | |
| 195 size_t keysToRemoveCount = keysToRemove.size(); | |
| 196 for (size_t i = 0; i < keysToRemoveCount; ++i) | |
| 197 gFontPlatformDataCache->remove(keysToRemove[i]); | |
| 198 } | |
| 199 | |
| 200 static inline void purgeFontVerticalDataCache() | |
| 201 { | |
| 202 #if ENABLE(OPENTYPE_VERTICAL) | |
| 203 FontVerticalDataCache& fontVerticalDataCache = fontVerticalDataCacheInstance
(); | |
| 204 if (!fontVerticalDataCache.isEmpty()) { | |
| 205 // Mark & sweep unused verticalData | |
| 206 FontVerticalDataCache::iterator verticalDataEnd = fontVerticalDataCache.
end(); | |
| 207 for (FontVerticalDataCache::iterator verticalData = fontVerticalDataCach
e.begin(); verticalData != verticalDataEnd; ++verticalData) { | |
| 208 if (verticalData->value) | |
| 209 verticalData->value->setInFontCache(false); | |
| 210 } | |
| 211 | |
| 212 gFontDataCache->markAllVerticalData(); | |
| 213 | |
| 214 Vector<FontCache::FontFileKey> keysToRemove; | |
| 215 keysToRemove.reserveInitialCapacity(fontVerticalDataCache.size()); | |
| 216 for (FontVerticalDataCache::iterator verticalData = fontVerticalDataCach
e.begin(); verticalData != verticalDataEnd; ++verticalData) { | |
| 217 if (!verticalData->value || !verticalData->value->inFontCache()) | |
| 218 keysToRemove.append(verticalData->key); | |
| 219 } | |
| 220 for (size_t i = 0, count = keysToRemove.size(); i < count; ++i) | |
| 221 fontVerticalDataCache.take(keysToRemove[i]); | |
| 222 } | |
| 223 #endif | |
| 224 } | |
| 225 | |
| 226 void FontCache::purge(PurgeSeverity PurgeSeverity) | |
| 227 { | |
| 228 // We should never be forcing the purge while the FontCachePurgePreventer is
in scope. | |
| 229 ASSERT(!m_purgePreventCount || PurgeSeverity == PurgeIfNeeded); | |
| 230 if (m_purgePreventCount) | |
| 231 return; | |
| 232 | |
| 233 if (!gFontDataCache || !gFontDataCache->purge(PurgeSeverity)) | |
| 234 return; | |
| 235 | |
| 236 purgePlatformFontDataCache(); | |
| 237 purgeFontVerticalDataCache(); | |
| 238 } | |
| 239 | |
| 240 static HashSet<FontSelector*>* gClients; | |
| 241 | |
| 242 void FontCache::addClient(FontSelector* client) | |
| 243 { | |
| 244 if (!gClients) | |
| 245 gClients = new HashSet<FontSelector*>; | |
| 246 | |
| 247 ASSERT(!gClients->contains(client)); | |
| 248 gClients->add(client); | |
| 249 } | |
| 250 | |
| 251 void FontCache::removeClient(FontSelector* client) | |
| 252 { | |
| 253 ASSERT(gClients); | |
| 254 ASSERT(gClients->contains(client)); | |
| 255 | |
| 256 gClients->remove(client); | |
| 257 } | |
| 258 | |
| 259 static unsigned short gGeneration = 0; | |
| 260 | |
| 261 unsigned short FontCache::generation() | |
| 262 { | |
| 263 return gGeneration; | |
| 264 } | |
| 265 | |
| 266 void FontCache::invalidate() | |
| 267 { | |
| 268 if (!gClients) { | |
| 269 ASSERT(!gFontPlatformDataCache); | |
| 270 return; | |
| 271 } | |
| 272 | |
| 273 if (gFontPlatformDataCache) { | |
| 274 delete gFontPlatformDataCache; | |
| 275 gFontPlatformDataCache = new FontPlatformDataCache; | |
| 276 } | |
| 277 | |
| 278 gGeneration++; | |
| 279 | |
| 280 Vector<RefPtr<FontSelector> > clients; | |
| 281 size_t numClients = gClients->size(); | |
| 282 clients.reserveInitialCapacity(numClients); | |
| 283 HashSet<FontSelector*>::iterator end = gClients->end(); | |
| 284 for (HashSet<FontSelector*>::iterator it = gClients->begin(); it != end; ++i
t) | |
| 285 clients.append(*it); | |
| 286 | |
| 287 ASSERT(numClients == clients.size()); | |
| 288 for (size_t i = 0; i < numClients; ++i) | |
| 289 clients[i]->fontCacheInvalidated(); | |
| 290 | |
| 291 purge(ForcePurge); | |
| 292 } | |
| 293 | |
| 294 } // namespace WebCore | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk