18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. 38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2007, 2008 Alp Toker <alp@atoker.com> 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2007 Holger Hans Peter Freyther 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * All rights reserved. 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modification, are permitted provided that the following conditions 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * are met: 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer. 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * documentation and/or other materials provided with the distribution. 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * its contributors may be used to endorse or promote products derived 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * from this software without specific prior written permission. 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "SimpleFontData.h" 358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "FloatRect.h" 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "Font.h" 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "FontCache.h" 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "FontDescription.h" 408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "GlyphBuffer.h" 41bec39347bb3bb5bf1187ccaf471d26247f28b585Kristian Monsen#include <cairo-ft.h> 428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <cairo.h> 43bec39347bb3bb5bf1187ccaf471d26247f28b585Kristian Monsen#include <fontconfig/fcfreetype.h> 448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <wtf/MathExtras.h> 458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore { 478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid SimpleFontData::platformInit() 498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project cairo_font_extents_t font_extents; 518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project cairo_text_extents_t text_extents; 5228040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu cairo_scaled_font_extents(m_platformData.scaledFont(), &font_extents); 532fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 542fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_fontMetrics.setAscent(font_extents.ascent); 552fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_fontMetrics.setDescent(font_extents.descent); 562fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 578f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // There seems to be some rounding error in cairo (or in how we 588f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // use cairo) with some fonts, like DejaVu Sans Mono, which makes 598f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // cairo report a height smaller than ascent + descent, which is 608f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // wrong and confuses WebCore's layout system. Workaround this 618f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // while we figure out what's going on. 622fc2651226baac27029e38c9d6ef883fa32084dbSteve Block float lineSpacing = font_extents.height; 632fc2651226baac27029e38c9d6ef883fa32084dbSteve Block if (lineSpacing < font_extents.ascent + font_extents.descent) 642fc2651226baac27029e38c9d6ef883fa32084dbSteve Block lineSpacing = font_extents.ascent + font_extents.descent; 652fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 662fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_fontMetrics.setLineSpacing(lroundf(lineSpacing)); 672fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_fontMetrics.setLineGap(lineSpacing - font_extents.ascent - font_extents.descent); 682fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 6928040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu cairo_scaled_font_text_extents(m_platformData.scaledFont(), "x", &text_extents); 702fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_fontMetrics.setXHeight(text_extents.height); 712fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 7228040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu cairo_scaled_font_text_extents(m_platformData.scaledFont(), " ", &text_extents); 73231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block m_spaceWidth = static_cast<float>(text_extents.x_advance); 742fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 755f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f; 765f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian} 775f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian 785f1ab04193ad0130ca8204aadaceae083aca9881Feng Qianvoid SimpleFontData::platformCharWidthInit() 795f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian{ 805f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian m_avgCharWidth = 0.f; 815f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian m_maxCharWidth = 0.f; 825f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian initCharWidths(); 838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid SimpleFontData::platformDestroy() 868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 89f05b935882198ccf7d81675736e3aeb089c5113aBen MurdochSimpleFontData* SimpleFontData::scaledFontData(const FontDescription& fontDescription, float scaleFactor) const 90f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch{ 91f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch return new SimpleFontData(FontPlatformData(cairo_scaled_font_get_font_face(m_platformData.scaledFont()), 92f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch scaleFactor * fontDescription.computedSize(), m_platformData.syntheticBold(), m_platformData.syntheticOblique()), 93f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch isCustomFont(), false); 94f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch} 95f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch 968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectSimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const 978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 98f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch if (!m_derivedFontData) 99f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch m_derivedFontData = DerivedFontData::create(isCustomFont()); 100bec39347bb3bb5bf1187ccaf471d26247f28b585Kristian Monsen // FIXME: I think we want to ask FontConfig for the right font again. 101f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch if (!m_derivedFontData->smallCaps) 102f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch m_derivedFontData->smallCaps = scaledFontData(fontDescription, .7); 103f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch 104f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch return m_derivedFontData->smallCaps.get(); 105f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch} 106f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch 107f05b935882198ccf7d81675736e3aeb089c5113aBen MurdochSimpleFontData* SimpleFontData::emphasisMarkFontData(const FontDescription& fontDescription) const 108f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch{ 109f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch if (!m_derivedFontData) 110f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch m_derivedFontData = DerivedFontData::create(isCustomFont()); 111f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch if (!m_derivedFontData->emphasisMark) 112f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch m_derivedFontData->emphasisMark = scaledFontData(fontDescription, .5); 113bec39347bb3bb5bf1187ccaf471d26247f28b585Kristian Monsen 114f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch return m_derivedFontData->emphasisMark.get(); 1158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectbool SimpleFontData::containsCharacters(const UChar* characters, int length) const 1188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 11928040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu FT_Face face = cairo_ft_scaled_font_lock_face(m_platformData.scaledFont()); 1208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!face) 1228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return false; 1238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1240bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch for (int i = 0; i < length; i++) { 1258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (FcFreeTypeCharIndex(face, characters[i]) == 0) { 12628040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu cairo_ft_scaled_font_unlock_face(m_platformData.scaledFont()); 1278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return false; 1288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 13128040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu cairo_ft_scaled_font_unlock_face(m_platformData.scaledFont()); 1328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return true; 1348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid SimpleFontData::determinePitch() 1378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 1385f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian m_treatAsFixedPitch = m_platformData.isFixedPitch(); 1398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 14121939df44de1705786c545cd1bf519d47250322dBen MurdochFloatRect SimpleFontData::platformBoundsForGlyph(Glyph) const 14221939df44de1705786c545cd1bf519d47250322dBen Murdoch{ 14321939df44de1705786c545cd1bf519d47250322dBen Murdoch return FloatRect(); 14421939df44de1705786c545cd1bf519d47250322dBen Murdoch} 14521939df44de1705786c545cd1bf519d47250322dBen Murdoch 14621939df44de1705786c545cd1bf519d47250322dBen Murdochfloat SimpleFontData::platformWidthForGlyph(Glyph glyph) const 1478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 14828040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu ASSERT(m_platformData.scaledFont()); 1498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project cairo_glyph_t cglyph = { glyph, 0, 0 }; 1518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project cairo_text_extents_t extents; 15228040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu cairo_scaled_font_glyph_extents(m_platformData.scaledFont(), &cglyph, 1, &extents); 1538e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float w = (float)m_spaceWidth; 15528040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu if (cairo_scaled_font_status(m_platformData.scaledFont()) == CAIRO_STATUS_SUCCESS && extents.x_advance) 1568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project w = (float)extents.x_advance; 15721939df44de1705786c545cd1bf519d47250322dBen Murdoch 15821939df44de1705786c545cd1bf519d47250322dBen Murdoch return w; 1598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 162