1/* 2 * Copyright (c) 2006, 2007, 2008, 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32 33#include "SkFontMgr.h" 34#include "SkTypeface.h" 35#include "platform/NotImplemented.h" 36#include "platform/fonts/AlternateFontFamily.h" 37#include "platform/fonts/FontCache.h" 38#include "platform/fonts/FontDescription.h" 39#include "platform/fonts/SimpleFontData.h" 40#include "wtf/Assertions.h" 41#include "wtf/text/AtomicString.h" 42#include "wtf/text/CString.h" 43#include <unicode/locid.h> 44 45namespace WebCore { 46 47void FontCache::platformInit() 48{ 49} 50 51#if !OS(WIN) && !OS(ANDROID) 52PassRefPtr<SimpleFontData> FontCache::platformFallbackForCharacter(const FontDescription& fontDescription, UChar32 c, const SimpleFontData*, bool) 53{ 54 icu::Locale locale = icu::Locale::getDefault(); 55 FontCache::SimpleFontFamily family; 56 FontCache::getFontFamilyForCharacter(c, locale.getLanguage(), &family); 57 if (family.name.isEmpty()) 58 return 0; 59 60 AtomicString atomicFamily(family.name); 61 // Changes weight and/or italic of given FontDescription depends on 62 // the result of fontconfig so that keeping the correct font mapping 63 // of the given character. See http://crbug.com/32109 for details. 64 bool shouldSetFakeBold = false; 65 bool shouldSetFakeItalic = false; 66 FontDescription description(fontDescription); 67 if (family.isBold && description.weight() < FontWeightBold) 68 description.setWeight(FontWeightBold); 69 if (!family.isBold && description.weight() >= FontWeightBold) { 70 shouldSetFakeBold = true; 71 description.setWeight(FontWeightNormal); 72 } 73 if (family.isItalic && description.italic() == FontItalicOff) 74 description.setItalic(FontItalicOn); 75 if (!family.isItalic && description.italic() == FontItalicOn) { 76 shouldSetFakeItalic = true; 77 description.setItalic(FontItalicOff); 78 } 79 80 FontPlatformData* substitutePlatformData = getFontPlatformData(description, atomicFamily); 81 if (!substitutePlatformData) 82 return 0; 83 FontPlatformData platformData = FontPlatformData(*substitutePlatformData); 84 platformData.setFakeBold(shouldSetFakeBold); 85 platformData.setFakeItalic(shouldSetFakeItalic); 86 return fontDataFromFontPlatformData(&platformData, DoNotRetain); 87} 88 89#endif // !OS(WIN) && !OS(ANDROID) 90 91PassRefPtr<SimpleFontData> FontCache::getLastResortFallbackFont(const FontDescription& description, ShouldRetain shouldRetain) 92{ 93 const AtomicString fallbackFontFamily = getFallbackFontFamily(description); 94 const FontPlatformData* fontPlatformData = 0; 95 if (!fallbackFontFamily.isEmpty()) 96 fontPlatformData = getFontPlatformData(description, fallbackFontFamily); 97 98 if (!fontPlatformData) { 99 // we should at least have Arial; this is the SkFontHost_fontconfig last resort fallback 100 DEFINE_STATIC_LOCAL(const AtomicString, arialStr, ("Arial", AtomicString::ConstructFromLiteral)); 101 fontPlatformData = getFontPlatformData(description, arialStr); 102 } 103 104 ASSERT(fontPlatformData); 105 return fontDataFromFontPlatformData(fontPlatformData, shouldRetain); 106} 107 108PassRefPtr<SkTypeface> FontCache::createTypeface(const FontDescription& fontDescription, const AtomicString& family, CString& name) 109{ 110 // If we're creating a fallback font (e.g. "-webkit-monospace"), convert the name into 111 // the fallback name (like "monospace") that fontconfig understands. 112 if (!family.length() || family.startsWith("-webkit-")) { 113 name = getFallbackFontFamily(fontDescription).string().utf8(); 114 } else { 115 // convert the name to utf8 116 name = family.string().utf8(); 117 } 118 119 int style = SkTypeface::kNormal; 120 if (fontDescription.weight() >= FontWeightBold) 121 style |= SkTypeface::kBold; 122 if (fontDescription.italic()) 123 style |= SkTypeface::kItalic; 124 125 // FIXME: Use SkFontStyle and matchFamilyStyle instead of legacyCreateTypeface. 126#if OS(WIN) && !ENABLE(GDI_FONTS_ON_WINDOWS) 127 if (m_fontManager) 128 return adoptRef(m_fontManager->legacyCreateTypeface(name.data(), style)); 129#endif 130 131 return adoptRef(SkTypeface::CreateFromName(name.data(), static_cast<SkTypeface::Style>(style))); 132} 133 134#if !OS(WIN) 135FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family, float fontSize) 136{ 137 CString name; 138 RefPtr<SkTypeface> tf(createTypeface(fontDescription, family, name)); 139 if (!tf) 140 return 0; 141 142 FontPlatformData* result = new FontPlatformData(tf, 143 name.data(), 144 fontSize, 145 (fontDescription.weight() >= FontWeightBold && !tf->isBold()) || fontDescription.isSyntheticBold(), 146 (fontDescription.italic() && !tf->isItalic()) || fontDescription.isSyntheticItalic(), 147 fontDescription.orientation(), 148 fontDescription.useSubpixelPositioning()); 149 return result; 150} 151#endif // !OS(WIN) 152 153} // namespace WebCore 154