author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 24 Sep 2009 12:53:48 +0300 | |
changeset 11 | c8a366e56285 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006, 2007 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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* its contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include "config.h" |
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#include <winsock2.h> |
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#include "Font.h" |
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#include "FontCache.h" |
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#include "FontData.h" |
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#include "FloatRect.h" |
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#include "FontDescription.h" |
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#include <wtf/MathExtras.h> |
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#include <unicode/uchar.h> |
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#include <unicode/unorm.h> |
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#include <ApplicationServices/ApplicationServices.h> |
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#include <mlang.h> |
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#include <tchar.h> |
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#include <WebKitSystemInterface/WebKitSystemInterface.h> |
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namespace WebCore { |
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using std::max; |
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static inline float scaleEmToUnits(float x, unsigned unitsPerEm) { return unitsPerEm ? x / (float)unitsPerEm : x; } |
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void FontData::platformInit() |
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{ |
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HDC dc = GetDC(0); |
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SaveDC(dc); |
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SelectObject(dc, m_font.hfont()); |
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int faceLength = GetTextFace(dc, 0, 0); |
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Vector<TCHAR> faceName(faceLength); |
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GetTextFace(dc, faceLength, faceName.data()); |
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m_syntheticBoldOffset = m_font.syntheticBold() ? 1.0f : 0.f; |
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CGFontRef font = m_font.cgFont(); |
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int iAscent = CGFontGetAscent(font); |
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int iDescent = CGFontGetDescent(font); |
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int iLineGap = CGFontGetLeading(font); |
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unsigned unitsPerEm = CGFontGetUnitsPerEm(font); |
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float pointSize = m_font.size(); |
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float fAscent = scaleEmToUnits(iAscent, unitsPerEm) * pointSize; |
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float fDescent = -scaleEmToUnits(iDescent, unitsPerEm) * pointSize; |
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float fLineGap = scaleEmToUnits(iLineGap, unitsPerEm) * pointSize; |
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m_isSystemFont = !_tcscmp(faceName.data(), _T("Lucida Grande")); |
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// We need to adjust Times, Helvetica, and Courier to closely match the |
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// vertical metrics of their Microsoft counterparts that are the de facto |
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// web standard. The AppKit adjustment of 20% is too big and is |
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// incorrectly added to line spacing, so we use a 15% adjustment instead |
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// and add it to the ascent. |
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if (!_tcscmp(faceName.data(), _T("Times")) || !_tcscmp(faceName.data(), _T("Helvetica")) || !_tcscmp(faceName.data(), _T("Courier"))) |
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fAscent += floorf(((fAscent + fDescent) * 0.15f) + 0.5f); |
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m_ascent = lroundf(fAscent); |
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m_descent = lroundf(fDescent); |
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m_lineGap = lroundf(fLineGap); |
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m_lineSpacing = m_ascent + m_descent + m_lineGap; |
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// Measure the actual character "x", because AppKit synthesizes X height rather than getting it from the font. |
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// Unfortunately, NSFont will round this for us so we don't quite get the right value. |
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Glyph xGlyph = GlyphPageTreeNode::getRootChild(this, 0)->page()->glyphDataForCharacter('x').glyph; |
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if (xGlyph) { |
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CGRect xBox; |
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CGFontGetGlyphBBoxes(font, &xGlyph, 1, &xBox); |
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// Use the maximum of either width or height because "x" is nearly square |
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// and web pages that foolishly use this metric for width will be laid out |
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// poorly if we return an accurate height. Classic case is Times 13 point, |
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// which has an "x" that is 7x6 pixels. |
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m_xHeight = scaleEmToUnits(max(CGRectGetMaxX(xBox), CGRectGetMaxY(xBox)), unitsPerEm) * pointSize; |
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} else { |
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int iXHeight = CGFontGetXHeight(font); |
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m_xHeight = scaleEmToUnits(iXHeight, unitsPerEm) * pointSize; |
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} |
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|
103 |
|
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|
104 |
RestoreDC(dc, -1); |
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|
105 |
ReleaseDC(0, dc); |
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|
106 |
|
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|
107 |
m_scriptCache = 0; |
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|
108 |
m_scriptFontProperties = 0; |
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|
109 |
} |
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|
110 |
|
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|
111 |
void FontData::platformDestroy() |
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|
112 |
{ |
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113 |
CGFontRelease(m_font.cgFont()); |
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114 |
DeleteObject(m_font.hfont()); |
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|
115 |
|
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|
116 |
// We don't hash this on Win32, so it's effectively owned by us. |
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|
117 |
delete m_smallCapsFontData; |
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|
118 |
|
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119 |
ScriptFreeCache(&m_scriptCache); |
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120 |
delete m_scriptFontProperties; |
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121 |
} |
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122 |
|
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123 |
FontData* FontData::smallCapsFontData(const FontDescription& fontDescription) const |
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124 |
{ |
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125 |
if (!m_smallCapsFontData) { |
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126 |
LOGFONT winfont; |
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127 |
GetObject(m_font.hfont(), sizeof(LOGFONT), &winfont); |
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128 |
int smallCapsHeight = lroundf(0.70f * fontDescription.computedSize()); |
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winfont.lfHeight = -smallCapsHeight * 32; |
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130 |
HFONT hfont = CreateFontIndirect(&winfont); |
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131 |
m_smallCapsFontData = new FontData(FontPlatformData(hfont, smallCapsHeight, fontDescription.bold(), fontDescription.italic())); |
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132 |
} |
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133 |
return m_smallCapsFontData; |
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134 |
} |
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|
135 |
|
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136 |
bool FontData::containsCharacters(const UChar* characters, int length) const |
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137 |
{ |
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138 |
// FIXME: Microsoft documentation seems to imply that characters can be output using a given font and DC |
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139 |
// merely by testing code page intersection. This seems suspect though. Can't a font only partially |
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140 |
// cover a given code page? |
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141 |
IMLangFontLink2* langFontLink = FontCache::getFontLinkInterface(); |
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142 |
if (!langFontLink) |
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143 |
return false; |
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|
144 |
|
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145 |
HDC dc = GetDC((HWND)0); |
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|
146 |
|
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147 |
DWORD acpCodePages; |
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148 |
langFontLink->CodePageToCodePages(CP_ACP, &acpCodePages); |
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|
149 |
|
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150 |
DWORD fontCodePages; |
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151 |
langFontLink->GetFontCodePages(dc, m_font.hfont(), &fontCodePages); |
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152 |
|
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153 |
DWORD actualCodePages; |
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154 |
long numCharactersProcessed; |
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155 |
long offset = 0; |
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156 |
while (offset < length) { |
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157 |
langFontLink->GetStrCodePages(characters, length, acpCodePages, &actualCodePages, &numCharactersProcessed); |
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158 |
if ((actualCodePages & fontCodePages) == 0) |
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|
159 |
return false; |
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160 |
offset += numCharactersProcessed; |
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|
161 |
} |
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|
162 |
|
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|
163 |
ReleaseDC(0, dc); |
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|
164 |
|
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|
165 |
return true; |
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|
166 |
} |
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|
167 |
|
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|
168 |
void FontData::determinePitch() |
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169 |
{ |
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|
170 |
// TEXTMETRICS have this. Set m_treatAsFixedPitch based off that. |
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|
171 |
HDC dc = GetDC((HWND)0); |
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|
172 |
SaveDC(dc); |
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173 |
SelectObject(dc, m_font.hfont()); |
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|
174 |
|
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|
175 |
// Yes, this looks backwards, but the fixed pitch bit is actually set if the font |
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Revision: 200911
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|
176 |
// is *not* fixed pitch. Unbelievable but true. |
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|
177 |
TEXTMETRIC tm; |
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|
178 |
GetTextMetrics(dc, &tm); |
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|
179 |
m_treatAsFixedPitch = ((tm.tmPitchAndFamily & TMPF_FIXED_PITCH) == 0); |
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|
180 |
|
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|
181 |
RestoreDC(dc, -1); |
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Revision: 200911
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|
182 |
ReleaseDC(0, dc); |
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|
183 |
} |
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|
184 |
|
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|
185 |
float FontData::platformWidthForGlyph(Glyph glyph) const |
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|
186 |
{ |
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|
187 |
CGFontRef font = m_font.cgFont(); |
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|
188 |
float pointSize = m_font.size(); |
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|
189 |
CGSize advance; |
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|
190 |
CGAffineTransform m = CGAffineTransformMakeScale(pointSize, pointSize); |
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Revision: 200911
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|
191 |
// FIXME: Need to add real support for printer fonts. |
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Revision: 200911
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|
192 |
bool isPrinterFont = false; |
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Revision: 200911
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|
193 |
wkGetGlyphAdvances(font, m, m_isSystemFont, isPrinterFont, glyph, advance); |
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|
194 |
return advance.width + m_syntheticBoldOffset; |
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|
195 |
} |
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|
196 |
|
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|
197 |
SCRIPT_FONTPROPERTIES* FontData::scriptFontProperties() const |
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|
198 |
{ |
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|
199 |
if (!m_scriptFontProperties) { |
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Revision: 200911
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|
200 |
m_scriptFontProperties = new SCRIPT_FONTPROPERTIES; |
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|
201 |
memset(m_scriptFontProperties, 0, sizeof(SCRIPT_FONTPROPERTIES)); |
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|
202 |
m_scriptFontProperties->cBytes = sizeof(SCRIPT_FONTPROPERTIES); |
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|
203 |
HRESULT result = ScriptGetFontProperties(0, scriptCache(), m_scriptFontProperties); |
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|
204 |
if (result == E_PENDING) { |
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Revision: 200911
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|
205 |
HDC dc = GetDC(0); |
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|
206 |
SaveDC(dc); |
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|
207 |
SelectObject(dc, m_font.hfont()); |
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|
208 |
ScriptGetFontProperties(dc, scriptCache(), m_scriptFontProperties); |
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Revision: 200911
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|
209 |
RestoreDC(dc, -1); |
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Revision: 200911
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diff
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210 |
ReleaseDC(0, dc); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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} |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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} |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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return m_scriptFontProperties; |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
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} |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
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} |