1 /* 2 Copyright (C) 2008 Holger Hans Peter Freyther 3 Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/ 4 Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies) 5 6 This library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Library General Public 8 License as published by the Free Software Foundation; either 9 version 2 of the License, or (at your option) any later version. 10 11 This library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Library General Public License for more details. 15 16 You should have received a copy of the GNU Library General Public License 17 along with this library; see the file COPYING.LIB. If not, write to 18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 Boston, MA 02110-1301, USA. 20 21 */ 22 23 #include "config.h" 24 #include "FontPlatformData.h" 25 26 #include "PlatformString.h" 27 28 namespace WebCore { 29 30 static inline QFont::Weight toQFontWeight(FontWeight fontWeight) 31 { 32 switch (fontWeight) { 33 case FontWeight100: 34 case FontWeight200: 35 return QFont::Light; // QFont::Light == Weight of 25 36 case FontWeight600: 37 return QFont::DemiBold; // QFont::DemiBold == Weight of 63 38 case FontWeight700: 39 case FontWeight800: 40 return QFont::Bold; // QFont::Bold == Weight of 75 41 case FontWeight900: 42 return QFont::Black; // QFont::Black == Weight of 87 43 case FontWeight300: 44 case FontWeight400: 45 case FontWeight500: 46 default: 47 return QFont::Normal; // QFont::Normal == Weight of 50 48 } 49 } 50 51 static inline bool isEmptyValue(const float size, const bool bold, const bool oblique) 52 { 53 // this is the empty value by definition of the trait FontDataCacheKeyTraits 54 return !bold && !oblique && size == 0.f; 55 } 56 57 FontPlatformData::FontPlatformData(float size, bool bold, bool oblique) 58 { 59 if (!isEmptyValue(size, bold, oblique)) 60 m_data = adoptRef(new FontPlatformDataPrivate(size, bold, oblique)); 61 } 62 63 FontPlatformData::FontPlatformData(const FontDescription& description, const AtomicString& familyName, int wordSpacing, int letterSpacing) 64 : m_data(adoptRef(new FontPlatformDataPrivate())) 65 { 66 QFont& font = m_data->font; 67 int requestedSize = qRound(description.computedPixelSize()); 68 font.setFamily(familyName); 69 font.setPixelSize(qRound(requestedSize)); 70 font.setItalic(description.italic()); 71 font.setWeight(toQFontWeight(description.weight())); 72 font.setWordSpacing(wordSpacing); 73 font.setLetterSpacing(QFont::AbsoluteSpacing, letterSpacing); 74 const bool smallCaps = description.smallCaps(); 75 font.setCapitalization(smallCaps ? QFont::SmallCaps : QFont::MixedCase); 76 font.setStyleStrategy(QFont::ForceIntegerMetrics); 77 78 m_data->bold = font.bold(); 79 // WebKit allows font size zero but QFont does not. We will return 80 // m_data->size if a font size of zero is requested and pixelSize() 81 // otherwise. 82 m_data->size = (!requestedSize) ? requestedSize : font.pixelSize(); 83 } 84 85 bool FontPlatformData::operator==(const FontPlatformData& other) const 86 { 87 if (m_data == other.m_data) 88 return true; 89 90 if (!m_data || !other.m_data || m_data->isDeletedValue || other.m_data->isDeletedValue) 91 return false; 92 93 const bool equals = (m_data->size == other.m_data->size 94 && m_data->bold == other.m_data->bold 95 && m_data->oblique == other.m_data->oblique 96 && m_data->font == other.m_data->font); 97 return equals; 98 } 99 100 unsigned FontPlatformData::hash() const 101 { 102 if (!m_data) 103 return 0; 104 if (m_data->isDeletedValue) 105 return 1; 106 return qHash(m_data->font.toString()) 107 ^ qHash(*reinterpret_cast<quint32*>(&m_data->size)) 108 ^ qHash(m_data->bold) 109 ^ qHash(m_data->oblique); 110 } 111 112 #ifndef NDEBUG 113 String FontPlatformData::description() const 114 { 115 return String(); 116 } 117 #endif 118 119 } 120