FontPlatformDataMac.mm [plain text]
/*
* This file is part of the internal font implementation.
*
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#import "config.h"
#import "FontPlatformData.h"
#import "PlatformString.h"
#import "WebCoreSystemInterface.h"
#import <CoreText/CoreText.h>
namespace WebCore {
FontPlatformData::FontPlatformData(GSFontRef gsFont, bool syntheticBold, bool syntheticOblique)
: m_syntheticBold(syntheticBold)
, m_syntheticOblique(syntheticOblique)
, m_atsuFontID(0)
, m_isEmoji(false)
, m_size(GSFontGetSize(gsFont))
, m_font(gsFont)
, m_cgFont(GSFontGetCGFont(gsFont))
, m_isColorBitmapFont(GSFontHasColorGlyphs(gsFont))
{
ASSERT_ARG(gsFont, gsFont);
CFRetain(gsFont);
}
FontPlatformData::FontPlatformData(const FontPlatformData& f)
{
m_font = f.m_font && f.m_font != reinterpret_cast<GSFontRef>(-1) ? static_cast<GSFontRef>(const_cast<void *>(CFRetain(f.m_font))) : f.m_font;
m_syntheticBold = f.m_syntheticBold;
m_syntheticOblique = f.m_syntheticOblique;
m_size = f.m_size;
m_cgFont = f.m_cgFont;
m_atsuFontID = f.m_atsuFontID;
m_isEmoji = f.m_isEmoji;
m_isColorBitmapFont = f.m_isColorBitmapFont;
#if USE(CORE_TEXT)
m_CTFont = f.m_CTFont;
#endif
}
FontPlatformData:: ~FontPlatformData()
{
if (m_font && m_font != reinterpret_cast<GSFontRef>(-1))
CFRelease(m_font);
}
const FontPlatformData& FontPlatformData::operator=(const FontPlatformData& f)
{
m_syntheticBold = f.m_syntheticBold;
m_syntheticOblique = f.m_syntheticOblique;
m_size = f.m_size;
m_cgFont = f.m_cgFont;
m_atsuFontID = f.m_atsuFontID;
m_isEmoji = f.m_isEmoji;
if (m_font == f.m_font)
return *this;
if (f.m_font && f.m_font != reinterpret_cast<GSFontRef>(-1))
CFRetain(f.m_font);
if (m_font && m_font != reinterpret_cast<GSFontRef>(-1))
CFRelease(m_font);
m_font = f.m_font;
m_isColorBitmapFont = f.m_isColorBitmapFont;
#if USE(CORE_TEXT)
m_CTFont = f.m_CTFont;
#endif
return *this;
}
void FontPlatformData::setFont(GSFontRef font)
{
ASSERT_ARG(font, font);
ASSERT(m_font != reinterpret_cast<GSFontRef>(-1));
if (m_font == font)
return;
CFRetain(font);
if (m_font)
CFRelease(m_font);
m_font = font;
m_size = GSFontGetSize(font);
m_cgFont = GSFontGetCGFont(font);
m_isColorBitmapFont = GSFontHasColorGlyphs(font);
}
bool FontPlatformData::allowsLigatures() const
{
if (!m_font)
return false;
RetainPtr<CFCharacterSetRef> characterSet(AdoptCF, CTFontCopyCharacterSet(ctFont()));
return !(characterSet.get() && CFCharacterSetIsCharacterMember(characterSet.get(), 'a'));
}
#if USE(CORE_TEXT)
CTFontRef FontPlatformData::ctFont() const
{
if (!m_CTFont) {
// Apple Color Emoji size is restricted to 20 or less.
CGFloat size = !m_isEmoji ? m_size : std::min<CGFloat>(m_size, 20);
m_CTFont.adoptCF(CTFontCreateWithGraphicsFont(m_cgFont.get(), size, 0, 0));
}
return m_CTFont.get();
}
#endif // USE(CORE_TEXT)
#ifndef NDEBUG
String FontPlatformData::description() const
{
RetainPtr<CFStringRef> cgFontDescription(AdoptCF, CFCopyDescription(m_cgFont.get()));
return String(cgFontDescription.get()) + " " + String::number(m_size) + (m_syntheticBold ? " synthetic bold" : "") + (m_syntheticOblique ? " syntheitic oblique" : "");
}
#endif
} // namespace WebCore