1 /* 2 * Copyright (C) 2006 Apple Computer, 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 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "config.h" 30 #include "SimpleFontData.h" 31 32 #include "FontCache.h" 33 #include "FloatRect.h" 34 #include "FontDescription.h" 35 #include <wtf/MathExtras.h> 36 #include <unicode/uchar.h> 37 #include <unicode/unorm.h> 38 39 #if OS(DARWIN) 40 #include "WebCoreSystemInterface.h" 41 #endif 42 43 #include <wx/defs.h> 44 #include <wx/dcscreen.h> 45 #include <wx/string.h> 46 #include "fontprops.h" 47 48 namespace WebCore 49 { 50 51 void SimpleFontData::platformInit() 52 { 53 wxFont *font = m_platformData.font(); 54 if (font && font->IsOk()) { 55 wxFontProperties props = wxFontProperties(font); 56 m_fontMetrics.setAscent(props.GetAscent()); 57 m_fontMetrics.setDescent(props.GetDescent()); 58 m_fontMetrics.setXHeight(props.GetXHeight()); 59 m_fontMetrics.setUnitsPerEm(1); // FIXME! 60 m_fontMetrics.setLineGap(props.GetLineGap()); 61 m_fontMetrics.setLineSpacing(props.GetLineSpacing()); 62 } 63 64 m_syntheticBoldOffset = 0.0f; 65 66 #if OS(WINDOWS) 67 m_scriptCache = 0; 68 m_scriptFontProperties = 0; 69 m_isSystemFont = false; 70 #endif 71 } 72 73 void SimpleFontData::platformCharWidthInit() 74 { 75 m_avgCharWidth = 0.f; 76 m_maxCharWidth = 0.f; 77 initCharWidths(); 78 } 79 80 void SimpleFontData::platformDestroy() 81 { 82 #if OS(WINDOWS) 83 if (m_scriptFontProperties) { 84 delete m_scriptFontProperties; 85 m_scriptFontProperties = 0; 86 } 87 88 if (m_scriptCache) 89 ScriptFreeCache(&m_scriptCache); 90 #endif 91 } 92 93 SimpleFontData* SimpleFontData::scaledFontData(const FontDescription& fontDescription, float scaleFactor) const 94 { 95 FontDescription desc = FontDescription(fontDescription); 96 desc.setSpecifiedSize(scaleFactor * fontDescription.computedSize()); 97 FontPlatformData platformData(desc, desc.family().family()); 98 return new SimpleFontData(platformData, isCustomFont(), false); 99 } 100 101 SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const 102 { 103 if (!m_derivedFontData) 104 m_derivedFontData = DerivedFontData::create(isCustomFont()); 105 if (!m_derivedFontData->smallCaps) 106 m_derivedFontData->smallCaps = scaledFontData(fontDescription, .7); 107 108 return m_derivedFontData->smallCaps.get(); 109 } 110 111 SimpleFontData* SimpleFontData::emphasisMarkFontData(const FontDescription& fontDescription) const 112 { 113 if (!m_derivedFontData) 114 m_derivedFontData = DerivedFontData::create(isCustomFont()); 115 if (!m_derivedFontData->emphasisMark) 116 m_derivedFontData->emphasisMark = scaledFontData(fontDescription, .5); 117 118 return m_derivedFontData->emphasisMark.get(); 119 } 120 121 bool SimpleFontData::containsCharacters(const UChar* characters, int length) const 122 { 123 // FIXME: We will need to implement this to load non-ASCII encoding sites 124 #if OS(WINDOWS) 125 return wxFontContainsCharacters(m_platformData.hfont(), characters, length); 126 #elif OS(DARWIN) 127 return wxFontContainsCharacters(m_platformData.nsFont(), characters, length); 128 #endif 129 return true; 130 } 131 132 void SimpleFontData::determinePitch() 133 { 134 if (m_platformData.font() && m_platformData.font()->Ok()) 135 m_treatAsFixedPitch = m_platformData.font()->IsFixedWidth(); 136 else 137 m_treatAsFixedPitch = false; 138 } 139 140 FloatRect SimpleFontData::platformBoundsForGlyph(Glyph) const 141 { 142 return FloatRect(); 143 } 144 145 float SimpleFontData::platformWidthForGlyph(Glyph glyph) const 146 { 147 #if __WXMSW__ 148 // under Windows / wxMSW we currently always use GDI fonts. 149 return widthForGDIGlyph(glyph); 150 #elif OS(DARWIN) 151 float pointSize = m_platformData.size(); 152 CGAffineTransform m = CGAffineTransformMakeScale(pointSize, pointSize); 153 CGSize advance; 154 NSFont* nsfont = (NSFont*)m_platformData.nsFont(); 155 if (!wkGetGlyphTransformedAdvances(m_platformData.cgFont(), nsfont, &m, &glyph, &advance)) { 156 // LOG_ERROR("Unable to cache glyph widths for %@ %f", [nsfont displayName], pointSize); 157 advance.width = 0; 158 } 159 return advance.width + m_syntheticBoldOffset; 160 #else 161 // TODO: fix this! Make GetTextExtents a method of wxFont in 2.9 162 int width = 10; 163 GetTextExtent(*m_platformData.font(), (wxChar)glyph, &width, NULL); 164 return width; 165 #endif 166 } 167 168 #if OS(WINDOWS) 169 SCRIPT_FONTPROPERTIES* SimpleFontData::scriptFontProperties() const 170 { 171 // AFAICT this is never called even by the Win port anymore. 172 return 0; 173 } 174 175 void SimpleFontData::initGDIFont() 176 { 177 // unused by wx port 178 } 179 180 void SimpleFontData::platformCommonDestroy() 181 { 182 // unused by wx port 183 } 184 185 float SimpleFontData::widthForGDIGlyph(Glyph glyph) const 186 { 187 HDC hdc = GetDC(0); 188 HGDIOBJ oldFont = SelectObject(hdc, m_platformData.hfont()); 189 int width; 190 GetCharWidthI(hdc, glyph, 1, 0, &width); 191 SelectObject(hdc, oldFont); 192 ReleaseDC(0, hdc); 193 return width; 194 } 195 #endif 196 197 } 198
