FontPlatformDataCocoa.mm [plain text]
/*
* This file is part of the internal font implementation.
*
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
* Copyright (c) 2010 Google 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 "WebCoreSystemInterface.h"
#import <AppKit/NSFont.h>
#import <wtf/text/WTFString.h>
namespace WebCore {
// These CoreText Text Spacing feature selectors are not defined in CoreText.
enum TextSpacingCTFeatureSelector { TextSpacingProportional, TextSpacingFullWidth, TextSpacingHalfWidth, TextSpacingThirdWidth, TextSpacingQuarterWidth };
#if PLATFORM(MAC)
void FontPlatformData::loadFont(NSFont* nsFont, float, NSFont*& outNSFont, CGFontRef& cgFont)
{
outNSFont = nsFont;
cgFont = CTFontCopyGraphicsFont(toCTFontRef(nsFont), 0);
}
#endif // PLATFORM(MAC)
FontPlatformData::FontPlatformData(NSFont *nsFont, float size, bool isPrinterFont, bool syntheticBold, bool syntheticOblique, FontOrientation orientation, FontWidthVariant widthVariant)
: m_syntheticBold(syntheticBold)
, m_syntheticOblique(syntheticOblique)
, m_orientation(orientation)
, m_size(size)
, m_widthVariant(widthVariant)
, m_font(nsFont)
, m_isColorBitmapFont(false)
, m_isCompositeFontReference(false)
, m_isPrinterFont(isPrinterFont)
{
ASSERT_ARG(nsFont, nsFont);
CGFontRef cgFont = 0;
loadFont(nsFont, size, m_font, cgFont);
#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
{
CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(toCTFontRef(m_font));
m_isColorBitmapFont = traits & kCTFontColorGlyphsTrait;
#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
m_isCompositeFontReference = traits & kCTFontCompositeTrait;
#endif
}
#endif
if (m_font)
CFRetain(m_font);
m_cgFont = adoptCF(cgFont);
}
FontPlatformData:: ~FontPlatformData()
{
if (m_font && m_font != reinterpret_cast<NSFont *>(-1))
CFRelease(m_font);
}
void FontPlatformData::platformDataInit(const FontPlatformData& f)
{
m_font = f.m_font && f.m_font != reinterpret_cast<NSFont *>(-1) ? const_cast<NSFont *>(static_cast<const NSFont *>(CFRetain(f.m_font))) : f.m_font;
m_cgFont = f.m_cgFont;
m_CTFont = f.m_CTFont;
}
const FontPlatformData& FontPlatformData::platformDataAssign(const FontPlatformData& f)
{
m_cgFont = f.m_cgFont;
if (m_font == f.m_font)
return *this;
if (f.m_font && f.m_font != reinterpret_cast<NSFont *>(-1))
CFRetain(f.m_font);
if (m_font && m_font != reinterpret_cast<NSFont *>(-1))
CFRelease(m_font);
m_font = f.m_font;
m_CTFont = f.m_CTFont;
return *this;
}
bool FontPlatformData::platformIsEqual(const FontPlatformData& other) const
{
if (m_font || other.m_font)
return m_font == other.m_font;
return m_cgFont == other.m_cgFont;
}
void FontPlatformData::setFont(NSFont *font)
{
ASSERT_ARG(font, font);
ASSERT(m_font != reinterpret_cast<NSFont *>(-1));
if (m_font == font)
return;
CFRetain(font);
if (m_font)
CFRelease(m_font);
m_font = font;
m_size = [font pointSize];
CGFontRef cgFont = 0;
NSFont* loadedFont = 0;
loadFont(m_font, m_size, loadedFont, cgFont);
m_cgFont = adoptCF(cgFont);
#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
{
CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(toCTFontRef(m_font));
m_isColorBitmapFont = traits & kCTFontColorGlyphsTrait;
#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
m_isCompositeFontReference = traits & kCTFontCompositeTrait;
#endif
}
#endif
m_CTFont = 0;
}
bool FontPlatformData::roundsGlyphAdvances() const
{
return [m_font renderingMode] == NSFontAntialiasedIntegerAdvancementsRenderingMode;
}
bool FontPlatformData::allowsLigatures() const
{
return ![[m_font coveredCharacterSet] characterIsMember:'a'];
}
inline int mapFontWidthVariantToCTFeatureSelector(FontWidthVariant variant)
{
switch(variant) {
case RegularWidth:
return TextSpacingProportional;
case HalfWidth:
return TextSpacingHalfWidth;
case ThirdWidth:
return TextSpacingThirdWidth;
case QuarterWidth:
return TextSpacingQuarterWidth;
}
ASSERT_NOT_REACHED();
return TextSpacingProportional;
}
static CFDictionaryRef createFeatureSettingDictionary(int featureTypeIdentifier, int featureSelectorIdentifier)
{
RetainPtr<CFNumberRef> featureTypeIdentifierNumber = adoptCF(CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &featureTypeIdentifier));
RetainPtr<CFNumberRef> featureSelectorIdentifierNumber = adoptCF(CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &featureSelectorIdentifier));
const void* settingKeys[] = { kCTFontFeatureTypeIdentifierKey, kCTFontFeatureSelectorIdentifierKey };
const void* settingValues[] = { featureTypeIdentifierNumber.get(), featureSelectorIdentifierNumber.get() };
return CFDictionaryCreate(kCFAllocatorDefault, settingKeys, settingValues, WTF_ARRAY_LENGTH(settingKeys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
}
static CTFontDescriptorRef cascadeToLastResortFontDescriptor()
{
static CTFontDescriptorRef descriptor;
if (descriptor)
return descriptor;
const void* keys[] = { kCTFontCascadeListAttribute };
const void* descriptors[] = { CTFontDescriptorCreateWithNameAndSize(CFSTR("LastResort"), 0) };
const void* values[] = { CFArrayCreate(kCFAllocatorDefault, descriptors, WTF_ARRAY_LENGTH(descriptors), &kCFTypeArrayCallBacks) };
RetainPtr<CFDictionaryRef> attributes = adoptCF(CFDictionaryCreate(kCFAllocatorDefault, keys, values, WTF_ARRAY_LENGTH(keys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
descriptor = CTFontDescriptorCreateWithAttributes(attributes.get());
return descriptor;
}
static CTFontDescriptorRef cascadeToLastResortAndDisableSwashesFontDescriptor()
{
static CTFontDescriptorRef descriptor;
if (descriptor)
return descriptor;
RetainPtr<CFDictionaryRef> lineInitialSwashesOffSetting = adoptCF(createFeatureSettingDictionary(kSmartSwashType, kLineInitialSwashesOffSelector));
RetainPtr<CFDictionaryRef> lineFinalSwashesOffSetting = adoptCF(createFeatureSettingDictionary(kSmartSwashType, kLineFinalSwashesOffSelector));
const void* settingDictionaries[] = { lineInitialSwashesOffSetting.get(), lineFinalSwashesOffSetting.get() };
RetainPtr<CFArrayRef> featureSettings = adoptCF(CFArrayCreate(kCFAllocatorDefault, settingDictionaries, WTF_ARRAY_LENGTH(settingDictionaries), &kCFTypeArrayCallBacks));
const void* keys[] = { kCTFontFeatureSettingsAttribute };
const void* values[] = { featureSettings.get() };
RetainPtr<CFDictionaryRef> attributes = adoptCF(CFDictionaryCreate(kCFAllocatorDefault, keys, values, WTF_ARRAY_LENGTH(keys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
descriptor = CTFontDescriptorCreateCopyWithAttributes(cascadeToLastResortFontDescriptor(), attributes.get());
return descriptor;
}
CTFontRef FontPlatformData::ctFont() const
{
if (m_CTFont)
return m_CTFont.get();
m_CTFont = toCTFontRef(m_font);
if (m_CTFont) {
CTFontDescriptorRef fontDescriptor;
RetainPtr<CFStringRef> postScriptName = adoptCF(CTFontCopyPostScriptName(m_CTFont.get()));
// Hoefler Text Italic has line-initial and -final swashes enabled by default, so disable them.
if (CFEqual(postScriptName.get(), CFSTR("HoeflerText-Italic")) || CFEqual(postScriptName.get(), CFSTR("HoeflerText-BlackItalic")))
fontDescriptor = cascadeToLastResortAndDisableSwashesFontDescriptor();
else
fontDescriptor = cascadeToLastResortFontDescriptor();
m_CTFont = adoptCF(CTFontCreateCopyWithAttributes(m_CTFont.get(), m_size, 0, fontDescriptor));
} else
m_CTFont = adoptCF(CTFontCreateWithGraphicsFont(m_cgFont.get(), m_size, 0, cascadeToLastResortFontDescriptor()));
if (m_widthVariant != RegularWidth) {
int featureTypeValue = kTextSpacingType;
int featureSelectorValue = mapFontWidthVariantToCTFeatureSelector(m_widthVariant);
RetainPtr<CTFontDescriptorRef> sourceDescriptor = adoptCF(CTFontCopyFontDescriptor(m_CTFont.get()));
RetainPtr<CFNumberRef> featureType = adoptCF(CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &featureTypeValue));
RetainPtr<CFNumberRef> featureSelector = adoptCF(CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &featureSelectorValue));
RetainPtr<CTFontDescriptorRef> newDescriptor = adoptCF(CTFontDescriptorCreateCopyWithFeature(sourceDescriptor.get(), featureType.get(), featureSelector.get()));
RetainPtr<CTFontRef> newFont = adoptCF(CTFontCreateWithFontDescriptor(newDescriptor.get(), m_size, 0));
if (newFont)
m_CTFont = newFont;
}
return m_CTFont.get();
}
#ifndef NDEBUG
String FontPlatformData::description() const
{
RetainPtr<CFStringRef> cgFontDescription = adoptCF(CFCopyDescription(cgFont()));
return String(cgFontDescription.get()) + " " + String::number(m_size)
+ (m_syntheticBold ? " synthetic bold" : "") + (m_syntheticOblique ? " synthetic oblique" : "") + (m_orientation ? " vertical orientation" : "");
}
#endif
} // namespace WebCore