Tools/FontWithFeatures/FontWithFeatures/main.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "FontCreator.h"

 #include <CoreFoundation/CoreFoundation.h>
 #include <CoreGraphics/CoreGraphics.h>
 #include <CoreServices/CoreServices.h>
 #include <CoreText/CoreText.h>
 #include <ImageIO/ImageIO.h>
 #include <fstream>

 static CTFontDescriptorRef constructFontWithTrueTypeFeature(CTFontDescriptorRef fontDescriptor, int type, int selector)
 {
     CFNumberRef typeValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &type);
     CFNumberRef selectorValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &selector);
     CFTypeRef featureDictionaryKeys[] = { kCTFontFeatureTypeIdentifierKey, kCTFontFeatureSelectorIdentifierKey };
     CFTypeRef featureDictionaryValues[] = { typeValue, selectorValue };
     CFDictionaryRef featureDictionary = CFDictionaryCreate(kCFAllocatorDefault, featureDictionaryKeys, featureDictionaryValues, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
     CFRelease(typeValue);
     CFRelease(selectorValue);

     CFTypeRef featureSettingsValues[] = { featureDictionary };
     CFArrayRef fontFeatureSettings = CFArrayCreate(kCFAllocatorDefault, featureSettingsValues, 1, &kCFTypeArrayCallBacks);
     CFRelease(featureDictionary);

     CFTypeRef fontDescriptorKeys[] = { kCTFontFeatureSettingsAttribute };
     CFTypeRef fontDescriptorValues[] = { fontFeatureSettings };
     CFDictionaryRef fontDescriptorAttributes = CFDictionaryCreate(kCFAllocatorDefault, fontDescriptorKeys, fontDescriptorValues, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
     CFRelease(fontFeatureSettings);

     CTFontDescriptorRef modifiedFontDescriptor = CTFontDescriptorCreateCopyWithAttributes(fontDescriptor, fontDescriptorAttributes);
     CFRelease(fontDescriptorAttributes);
     return modifiedFontDescriptor;
 }

 static CTFontDescriptorRef constructFontWithOpenTypeFeature(CTFontDescriptorRef fontDescriptor, CFStringRef feature, int value)
 {
     CFNumberRef featureValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &value);
     CFTypeRef featureDictionaryKeys[] = { kCTFontOpenTypeFeatureTag, kCTFontOpenTypeFeatureValue };
     CFTypeRef featureDictionaryValues[] = { feature, featureValue };
     CFDictionaryRef featureDictionary = CFDictionaryCreate(kCFAllocatorDefault, featureDictionaryKeys, featureDictionaryValues, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
     CFRelease(featureValue);

     CFTypeRef featureSettingsValues[] = { featureDictionary };
     CFArrayRef fontFeatureSettings = CFArrayCreate(kCFAllocatorDefault, featureSettingsValues, 1, &kCFTypeArrayCallBacks);
     CFRelease(featureDictionary);

     CFTypeRef fontDescriptorKeys[] = { kCTFontFeatureSettingsAttribute };
     CFTypeRef fontDescriptorValues[] = { fontFeatureSettings };
     CFDictionaryRef fontDescriptorAttributes = CFDictionaryCreate(kCFAllocatorDefault, fontDescriptorKeys, fontDescriptorValues, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
     CFRelease(fontFeatureSettings);

     CTFontDescriptorRef modifiedFontDescriptor = CTFontDescriptorCreateCopyWithAttributes(fontDescriptor, fontDescriptorAttributes);
     CFRelease(fontDescriptorAttributes);
     return modifiedFontDescriptor;
 }

 static void drawText(CGContextRef context, CTFontDescriptorRef fontDescriptor, CFStringRef prefix, CGPoint location)
 {
     CGContextSetTextMatrix(context, CGAffineTransformScale(CGAffineTransformIdentity, 1, 1));
     CGContextSetTextPosition(context, location.x, location.y);

     CGFloat fontSize = 25;
     CTFontRef font = CTFontCreateWithFontDescriptor(fontDescriptor, fontSize, nullptr);

     CFMutableStringRef string = CFStringCreateMutable(kCFAllocatorDefault, 0);
     CFStringAppend(string, prefix);
     CFStringAppend(string, CFSTR("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));

     CGColorRef red = CGColorCreateGenericRGB(1, 0, 0, 1);
     CFTypeRef lineKeys[] = { kCTForegroundColorAttributeName };
     CFTypeRef lineValues[] = { red };
     CFDictionaryRef lineAttributes = CFDictionaryCreate(kCFAllocatorDefault, lineKeys, lineValues, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
     CGColorRelease(red);

     CFAttributedStringRef attributedString = CFAttributedStringCreate(kCFAllocatorDefault, string, lineAttributes);
     CFRelease(lineAttributes);

     CFMutableAttributedStringRef mutableAttributedString = CFAttributedStringCreateMutableCopy(kCFAllocatorDefault, 0, attributedString);
     CFRelease(attributedString);

     CTFontRef monospaceFont = CTFontCreateWithName(CFSTR("Courier"), fontSize, nullptr);
     CFAttributedStringSetAttribute(mutableAttributedString, CFRangeMake(0, CFStringGetLength(prefix)), kCTFontAttributeName, monospaceFont);
     CFRelease(monospaceFont);

     CFAttributedStringSetAttribute(mutableAttributedString, CFRangeMake(CFStringGetLength(prefix), CFStringGetLength(string) - CFStringGetLength(prefix)), kCTFontAttributeName, font);
     CFRelease(string);
     CFRelease(font);

     CTLineRef line = CTLineCreateWithAttributedString(mutableAttributedString);
     CFRelease(mutableAttributedString);

     CTLineDraw(line, context);
     CFRelease(line);
 }

 int main(int argc, const char * argv[])
 {
     size_t width = 2500;
     size_t height = 2000;
     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
     CGContextRef context = CGBitmapContextCreate(nullptr, width, height, 8, width * 4, colorSpace, kCGImageAlphaNoneSkipLast);
     CGColorSpaceRelease(colorSpace);
     Type type = Type::TrueType;
     const std::vector<uint8_t> fontVector = generateFont(type);
     std::ofstream outputFile("/Volumes/Data/home/mmaxfield/src/WebKit/OpenSource/LayoutTests/css3/resources/FontWithFeatures.ttf", std::ios::out | std::ios::binary);
     for (uint8_t b : fontVector)
         outputFile << b;
     outputFile.close();

     CFDataRef fontData = CFDataCreate(kCFAllocatorDefault, fontVector.data(), fontVector.size());
     CTFontDescriptorRef fontDescriptor = CTFontManagerCreateFontDescriptorFromData(fontData);
     CFRelease(fontData);

     if (type == Type::OpenType) {
         CFTypeRef featureValuesOpenType[] = { CFSTR("liga"), CFSTR("clig"), CFSTR("dlig"), CFSTR("hlig"), CFSTR("calt"), CFSTR("subs"), CFSTR("sups"), CFSTR("smcp"), CFSTR("c2sc"), CFSTR("pcap"), CFSTR("c2pc"), CFSTR("unic"), CFSTR("titl"), CFSTR("onum"), CFSTR("pnum"), CFSTR("tnum"), CFSTR("frac"), CFSTR("afrc"), CFSTR("ordn"), CFSTR("zero"), CFSTR("hist"), CFSTR("jp78"), CFSTR("jp83"), CFSTR("jp90"), CFSTR("jp04"), CFSTR("smpl"), CFSTR("trad"), CFSTR("fwid"), CFSTR("pwid"), CFSTR("ruby") };
         CFArrayRef features = CFArrayCreate(kCFAllocatorDefault, featureValuesOpenType, 30, &kCFTypeArrayCallBacks);

         for (CFIndex i = 0; i < CFArrayGetCount(features); ++i) {
             CFStringRef feature = static_cast<CFStringRef>(CFArrayGetValueAtIndex(features, i));
             CTFontDescriptorRef modifiedFontDescriptor = constructFontWithOpenTypeFeature(fontDescriptor, feature, 1);
             CFMutableStringRef prefix = CFStringCreateMutable(kCFAllocatorDefault, 0);
             CFStringAppend(prefix, feature);
             CFStringAppend(prefix, CFSTR("  (on): "));
             drawText(context, modifiedFontDescriptor, prefix, CGPointMake(25, 1950 - 50 * i));
             CFRelease(prefix);
             CFRelease(modifiedFontDescriptor);

             modifiedFontDescriptor = constructFontWithOpenTypeFeature(fontDescriptor, feature, 0);
             prefix = CFStringCreateMutable(kCFAllocatorDefault, 0);
             CFStringAppend(prefix, feature);
             CFStringAppend(prefix, CFSTR(" (off): "));
             drawText(context, modifiedFontDescriptor, prefix, CGPointMake(25, 1925 - 50 * i));
             CFRelease(prefix);
             CFRelease(modifiedFontDescriptor);
         }

         CFRelease(features);
     } else {
         __block int i = 0;
         void (^handler)(uint16_t type, CFStringRef typeString, uint16_t selector, CFStringRef selectorString) = ^(uint16_t type, CFStringRef typeString, uint16_t selector, CFStringRef selectorString)
         {
             CTFontDescriptorRef modifiedFontDescriptor = constructFontWithTrueTypeFeature(fontDescriptor, type, selector);
             CFMutableStringRef prefix = CFStringCreateMutable(kCFAllocatorDefault, 0);
             CFStringAppend(prefix, typeString);
             CFStringAppend(prefix, CFSTR(": "));
             CFStringAppend(prefix, selectorString);
             CFStringAppend(prefix, CFSTR(": "));
             while (CFStringGetLength(prefix) < 65)
                 CFStringAppend(prefix, CFSTR(" "));
             drawText(context, modifiedFontDescriptor, prefix, CGPointMake(25, 1950 - 40 * i));
             CFRelease(prefix);
             CFRelease(modifiedFontDescriptor);
             ++i;
         };
         handler(kLigaturesType, CFSTR("kLigaturesType"), kCommonLigaturesOnSelector, CFSTR("kCommonLigaturesOnSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kContextualLigaturesOnSelector, CFSTR("kContextualLigaturesOnSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kCommonLigaturesOffSelector, CFSTR("kCommonLigaturesOffSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kContextualLigaturesOffSelector, CFSTR("kContextualLigaturesOffSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kRareLigaturesOnSelector, CFSTR("kRareLigaturesOnSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kRareLigaturesOffSelector, CFSTR("kRareLigaturesOffSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kHistoricalLigaturesOnSelector, CFSTR("kHistoricalLigaturesOnSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kHistoricalLigaturesOffSelector, CFSTR("kHistoricalLigaturesOffSelector"));
         handler(kContextualAlternatesType, CFSTR("kContextualAlternatesType"), kContextualAlternatesOnSelector, CFSTR("kContextualAlternatesOnSelector"));
         handler(kContextualAlternatesType, CFSTR("kContextualAlternatesType"), kContextualAlternatesOffSelector, CFSTR("kContextualAlternatesOffSelector"));
         handler(kVerticalPositionType, CFSTR("kVerticalPositionType"), kInferiorsSelector, CFSTR("kInferiorsSelector"));
         handler(kVerticalPositionType, CFSTR("kVerticalPositionType"), kSuperiorsSelector, CFSTR("kSuperiorsSelector"));
         handler(kLowerCaseType, CFSTR("kLowerCaseType"), kLowerCaseSmallCapsSelector, CFSTR("kLowerCaseSmallCapsSelector"));
         handler(kUpperCaseType, CFSTR("kUpperCaseType"), kUpperCaseSmallCapsSelector, CFSTR("kUpperCaseSmallCapsSelector"));
         handler(kLowerCaseType, CFSTR("kLowerCaseType"), kLowerCasePetiteCapsSelector, CFSTR("kLowerCasePetiteCapsSelector"));
         handler(kUpperCaseType, CFSTR("kUpperCaseType"), kUpperCasePetiteCapsSelector, CFSTR("kUpperCasePetiteCapsSelector"));
         handler(kLetterCaseType, CFSTR("kLetterCaseType"), 14, CFSTR("14"));
         handler(kStyleOptionsType, CFSTR("kStyleOptionsType"), kTitlingCapsSelector, CFSTR("kTitlingCapsSelector"));
         handler(kNumberCaseType, CFSTR("kNumberCaseType"), kUpperCaseNumbersSelector, CFSTR("kUpperCaseNumbersSelector"));
         handler(kNumberCaseType, CFSTR("kNumberCaseType"), kLowerCaseNumbersSelector, CFSTR("kLowerCaseNumbersSelector"));
         handler(kNumberSpacingType, CFSTR("kNumberSpacingType"), kProportionalNumbersSelector, CFSTR("kProportionalNumbersSelector"));
         handler(kNumberSpacingType, CFSTR("kNumberSpacingType"), kMonospacedNumbersSelector, CFSTR("kMonospacedNumbersSelector"));
         handler(kFractionsType, CFSTR("kFractionsType"), kDiagonalFractionsSelector, CFSTR("kDiagonalFractionsSelector"));
         handler(kFractionsType, CFSTR("kFractionsType"), kVerticalFractionsSelector, CFSTR("kVerticalFractionsSelector"));
         handler(kVerticalPositionType, CFSTR("kVerticalPositionType"), kOrdinalsSelector, CFSTR("kOrdinalsSelector"));
         handler(kTypographicExtrasType, CFSTR("kTypographicExtrasType"), kSlashedZeroOnSelector, CFSTR("kSlashedZeroOnSelector"));
         handler(kLigaturesType, CFSTR("kLigaturesType"), kHistoricalLigaturesOnSelector, CFSTR("kHistoricalLigaturesOnSelector"));
         handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS1978CharactersSelector, CFSTR("kJIS1978CharactersSelector"));
         handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS1983CharactersSelector, CFSTR("kJIS1983CharactersSelector"));
         handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS1990CharactersSelector, CFSTR("kJIS1990CharactersSelector"));
         handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS2004CharactersSelector, CFSTR("kJIS2004CharactersSelector"));
         handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kSimplifiedCharactersSelector, CFSTR("kSimplifiedCharactersSelector"));
         handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kTraditionalCharactersSelector, CFSTR("kTraditionalCharactersSelector"));
         handler(kTextSpacingType, CFSTR("kTextSpacingType"), kMonospacedTextSelector, CFSTR("kMonospacedTextSelector"));
         handler(kTextSpacingType, CFSTR("kTextSpacingType"), kProportionalTextSelector, CFSTR("kProportionalTextSelector"));
         handler(kRubyKanaType, CFSTR("kRubyKanaType"), kRubyKanaOnSelector, CFSTR("kRubyKanaOnSelector"));
     }

     CFRelease(fontDescriptor);
     CGImageRef image = CGBitmapContextCreateImage(context);
     CGContextRelease(context);
     CFURLRef url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, CFSTR("/Volumes/Data/home/mmaxfield/tmp/output.png"), kCFURLPOSIXPathStyle, FALSE);
     CGImageDestinationRef imageDestination = CGImageDestinationCreateWithURL(url, kUTTypePNG, 1, nullptr);
     CFRelease(url);
     CGImageDestinationAddImage(imageDestination, image, nullptr);
     CGImageRelease(image);
     CGImageDestinationFinalize(imageDestination);
     CFRelease(imageDestination);
     return 0;
 }
	/*
	* Copyright (C) 2015 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "FontCreator.h"

	#include <CoreFoundation/CoreFoundation.h>
	#include <CoreGraphics/CoreGraphics.h>
	#include <CoreServices/CoreServices.h>
	#include <CoreText/CoreText.h>
	#include <ImageIO/ImageIO.h>
	#include <fstream>

	static CTFontDescriptorRef constructFontWithTrueTypeFeature(CTFontDescriptorRef fontDescriptor, int type, int selector)
	{
	CFNumberRef typeValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &type);
	CFNumberRef selectorValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &selector);
	CFTypeRef featureDictionaryKeys[] = { kCTFontFeatureTypeIdentifierKey, kCTFontFeatureSelectorIdentifierKey };
	CFTypeRef featureDictionaryValues[] = { typeValue, selectorValue };
	CFDictionaryRef featureDictionary = CFDictionaryCreate(kCFAllocatorDefault, featureDictionaryKeys, featureDictionaryValues, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
	CFRelease(typeValue);
	CFRelease(selectorValue);

	CFTypeRef featureSettingsValues[] = { featureDictionary };
	CFArrayRef fontFeatureSettings = CFArrayCreate(kCFAllocatorDefault, featureSettingsValues, 1, &kCFTypeArrayCallBacks);
	CFRelease(featureDictionary);

	CFTypeRef fontDescriptorKeys[] = { kCTFontFeatureSettingsAttribute };
	CFTypeRef fontDescriptorValues[] = { fontFeatureSettings };
	CFDictionaryRef fontDescriptorAttributes = CFDictionaryCreate(kCFAllocatorDefault, fontDescriptorKeys, fontDescriptorValues, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
	CFRelease(fontFeatureSettings);

	CTFontDescriptorRef modifiedFontDescriptor = CTFontDescriptorCreateCopyWithAttributes(fontDescriptor, fontDescriptorAttributes);
	CFRelease(fontDescriptorAttributes);
	return modifiedFontDescriptor;
	}

	static CTFontDescriptorRef constructFontWithOpenTypeFeature(CTFontDescriptorRef fontDescriptor, CFStringRef feature, int value)
	{
	CFNumberRef featureValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &value);
	CFTypeRef featureDictionaryKeys[] = { kCTFontOpenTypeFeatureTag, kCTFontOpenTypeFeatureValue };
	CFTypeRef featureDictionaryValues[] = { feature, featureValue };
	CFDictionaryRef featureDictionary = CFDictionaryCreate(kCFAllocatorDefault, featureDictionaryKeys, featureDictionaryValues, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
	CFRelease(featureValue);

	CFTypeRef featureSettingsValues[] = { featureDictionary };
	CFArrayRef fontFeatureSettings = CFArrayCreate(kCFAllocatorDefault, featureSettingsValues, 1, &kCFTypeArrayCallBacks);
	CFRelease(featureDictionary);

	CFTypeRef fontDescriptorKeys[] = { kCTFontFeatureSettingsAttribute };
	CFTypeRef fontDescriptorValues[] = { fontFeatureSettings };
	CFDictionaryRef fontDescriptorAttributes = CFDictionaryCreate(kCFAllocatorDefault, fontDescriptorKeys, fontDescriptorValues, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
	CFRelease(fontFeatureSettings);

	CTFontDescriptorRef modifiedFontDescriptor = CTFontDescriptorCreateCopyWithAttributes(fontDescriptor, fontDescriptorAttributes);
	CFRelease(fontDescriptorAttributes);
	return modifiedFontDescriptor;
	}

	static void drawText(CGContextRef context, CTFontDescriptorRef fontDescriptor, CFStringRef prefix, CGPoint location)
	{
	CGContextSetTextMatrix(context, CGAffineTransformScale(CGAffineTransformIdentity, 1, 1));
	CGContextSetTextPosition(context, location.x, location.y);

	CGFloat fontSize = 25;
	CTFontRef font = CTFontCreateWithFontDescriptor(fontDescriptor, fontSize, nullptr);

	CFMutableStringRef string = CFStringCreateMutable(kCFAllocatorDefault, 0);
	CFStringAppend(string, prefix);
	CFStringAppend(string, CFSTR("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"));

	CGColorRef red = CGColorCreateGenericRGB(1, 0, 0, 1);
	CFTypeRef lineKeys[] = { kCTForegroundColorAttributeName };
	CFTypeRef lineValues[] = { red };
	CFDictionaryRef lineAttributes = CFDictionaryCreate(kCFAllocatorDefault, lineKeys, lineValues, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
	CGColorRelease(red);

	CFAttributedStringRef attributedString = CFAttributedStringCreate(kCFAllocatorDefault, string, lineAttributes);
	CFRelease(lineAttributes);

	CFMutableAttributedStringRef mutableAttributedString = CFAttributedStringCreateMutableCopy(kCFAllocatorDefault, 0, attributedString);
	CFRelease(attributedString);

	CTFontRef monospaceFont = CTFontCreateWithName(CFSTR("Courier"), fontSize, nullptr);
	CFAttributedStringSetAttribute(mutableAttributedString, CFRangeMake(0, CFStringGetLength(prefix)), kCTFontAttributeName, monospaceFont);
	CFRelease(monospaceFont);

	CFAttributedStringSetAttribute(mutableAttributedString, CFRangeMake(CFStringGetLength(prefix), CFStringGetLength(string) - CFStringGetLength(prefix)), kCTFontAttributeName, font);
	CFRelease(string);
	CFRelease(font);

	CTLineRef line = CTLineCreateWithAttributedString(mutableAttributedString);
	CFRelease(mutableAttributedString);

	CTLineDraw(line, context);
	CFRelease(line);
	}

	int main(int argc, const char * argv[])
	{
	size_t width = 2500;
	size_t height = 2000;
	CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
	CGContextRef context = CGBitmapContextCreate(nullptr, width, height, 8, width * 4, colorSpace, kCGImageAlphaNoneSkipLast);
	CGColorSpaceRelease(colorSpace);
	Type type = Type::TrueType;
	const std::vector<uint8_t> fontVector = generateFont(type);
	std::ofstream outputFile("/Volumes/Data/home/mmaxfield/src/WebKit/OpenSource/LayoutTests/css3/resources/FontWithFeatures.ttf", std::ios::out \| std::ios::binary);
	for (uint8_t b : fontVector)
	outputFile << b;
	outputFile.close();

	CFDataRef fontData = CFDataCreate(kCFAllocatorDefault, fontVector.data(), fontVector.size());
	CTFontDescriptorRef fontDescriptor = CTFontManagerCreateFontDescriptorFromData(fontData);
	CFRelease(fontData);

	if (type == Type::OpenType) {
	CFTypeRef featureValuesOpenType[] = { CFSTR("liga"), CFSTR("clig"), CFSTR("dlig"), CFSTR("hlig"), CFSTR("calt"), CFSTR("subs"), CFSTR("sups"), CFSTR("smcp"), CFSTR("c2sc"), CFSTR("pcap"), CFSTR("c2pc"), CFSTR("unic"), CFSTR("titl"), CFSTR("onum"), CFSTR("pnum"), CFSTR("tnum"), CFSTR("frac"), CFSTR("afrc"), CFSTR("ordn"), CFSTR("zero"), CFSTR("hist"), CFSTR("jp78"), CFSTR("jp83"), CFSTR("jp90"), CFSTR("jp04"), CFSTR("smpl"), CFSTR("trad"), CFSTR("fwid"), CFSTR("pwid"), CFSTR("ruby") };
	CFArrayRef features = CFArrayCreate(kCFAllocatorDefault, featureValuesOpenType, 30, &kCFTypeArrayCallBacks);

	for (CFIndex i = 0; i < CFArrayGetCount(features); ++i) {
	CFStringRef feature = static_cast<CFStringRef>(CFArrayGetValueAtIndex(features, i));
	CTFontDescriptorRef modifiedFontDescriptor = constructFontWithOpenTypeFeature(fontDescriptor, feature, 1);
	CFMutableStringRef prefix = CFStringCreateMutable(kCFAllocatorDefault, 0);
	CFStringAppend(prefix, feature);
	CFStringAppend(prefix, CFSTR(" (on): "));
	drawText(context, modifiedFontDescriptor, prefix, CGPointMake(25, 1950 - 50 * i));
	CFRelease(prefix);
	CFRelease(modifiedFontDescriptor);

	modifiedFontDescriptor = constructFontWithOpenTypeFeature(fontDescriptor, feature, 0);
	prefix = CFStringCreateMutable(kCFAllocatorDefault, 0);
	CFStringAppend(prefix, feature);
	CFStringAppend(prefix, CFSTR(" (off): "));
	drawText(context, modifiedFontDescriptor, prefix, CGPointMake(25, 1925 - 50 * i));
	CFRelease(prefix);
	CFRelease(modifiedFontDescriptor);
	}

	CFRelease(features);
	} else {
	__block int i = 0;
	void (^handler)(uint16_t type, CFStringRef typeString, uint16_t selector, CFStringRef selectorString) = ^(uint16_t type, CFStringRef typeString, uint16_t selector, CFStringRef selectorString)
	{
	CTFontDescriptorRef modifiedFontDescriptor = constructFontWithTrueTypeFeature(fontDescriptor, type, selector);
	CFMutableStringRef prefix = CFStringCreateMutable(kCFAllocatorDefault, 0);
	CFStringAppend(prefix, typeString);
	CFStringAppend(prefix, CFSTR(": "));
	CFStringAppend(prefix, selectorString);
	CFStringAppend(prefix, CFSTR(": "));
	while (CFStringGetLength(prefix) < 65)
	CFStringAppend(prefix, CFSTR(" "));
	drawText(context, modifiedFontDescriptor, prefix, CGPointMake(25, 1950 - 40 * i));
	CFRelease(prefix);
	CFRelease(modifiedFontDescriptor);
	++i;
	};
	handler(kLigaturesType, CFSTR("kLigaturesType"), kCommonLigaturesOnSelector, CFSTR("kCommonLigaturesOnSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kContextualLigaturesOnSelector, CFSTR("kContextualLigaturesOnSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kCommonLigaturesOffSelector, CFSTR("kCommonLigaturesOffSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kContextualLigaturesOffSelector, CFSTR("kContextualLigaturesOffSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kRareLigaturesOnSelector, CFSTR("kRareLigaturesOnSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kRareLigaturesOffSelector, CFSTR("kRareLigaturesOffSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kHistoricalLigaturesOnSelector, CFSTR("kHistoricalLigaturesOnSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kHistoricalLigaturesOffSelector, CFSTR("kHistoricalLigaturesOffSelector"));
	handler(kContextualAlternatesType, CFSTR("kContextualAlternatesType"), kContextualAlternatesOnSelector, CFSTR("kContextualAlternatesOnSelector"));
	handler(kContextualAlternatesType, CFSTR("kContextualAlternatesType"), kContextualAlternatesOffSelector, CFSTR("kContextualAlternatesOffSelector"));
	handler(kVerticalPositionType, CFSTR("kVerticalPositionType"), kInferiorsSelector, CFSTR("kInferiorsSelector"));
	handler(kVerticalPositionType, CFSTR("kVerticalPositionType"), kSuperiorsSelector, CFSTR("kSuperiorsSelector"));
	handler(kLowerCaseType, CFSTR("kLowerCaseType"), kLowerCaseSmallCapsSelector, CFSTR("kLowerCaseSmallCapsSelector"));
	handler(kUpperCaseType, CFSTR("kUpperCaseType"), kUpperCaseSmallCapsSelector, CFSTR("kUpperCaseSmallCapsSelector"));
	handler(kLowerCaseType, CFSTR("kLowerCaseType"), kLowerCasePetiteCapsSelector, CFSTR("kLowerCasePetiteCapsSelector"));
	handler(kUpperCaseType, CFSTR("kUpperCaseType"), kUpperCasePetiteCapsSelector, CFSTR("kUpperCasePetiteCapsSelector"));
	handler(kLetterCaseType, CFSTR("kLetterCaseType"), 14, CFSTR("14"));
	handler(kStyleOptionsType, CFSTR("kStyleOptionsType"), kTitlingCapsSelector, CFSTR("kTitlingCapsSelector"));
	handler(kNumberCaseType, CFSTR("kNumberCaseType"), kUpperCaseNumbersSelector, CFSTR("kUpperCaseNumbersSelector"));
	handler(kNumberCaseType, CFSTR("kNumberCaseType"), kLowerCaseNumbersSelector, CFSTR("kLowerCaseNumbersSelector"));
	handler(kNumberSpacingType, CFSTR("kNumberSpacingType"), kProportionalNumbersSelector, CFSTR("kProportionalNumbersSelector"));
	handler(kNumberSpacingType, CFSTR("kNumberSpacingType"), kMonospacedNumbersSelector, CFSTR("kMonospacedNumbersSelector"));
	handler(kFractionsType, CFSTR("kFractionsType"), kDiagonalFractionsSelector, CFSTR("kDiagonalFractionsSelector"));
	handler(kFractionsType, CFSTR("kFractionsType"), kVerticalFractionsSelector, CFSTR("kVerticalFractionsSelector"));
	handler(kVerticalPositionType, CFSTR("kVerticalPositionType"), kOrdinalsSelector, CFSTR("kOrdinalsSelector"));
	handler(kTypographicExtrasType, CFSTR("kTypographicExtrasType"), kSlashedZeroOnSelector, CFSTR("kSlashedZeroOnSelector"));
	handler(kLigaturesType, CFSTR("kLigaturesType"), kHistoricalLigaturesOnSelector, CFSTR("kHistoricalLigaturesOnSelector"));
	handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS1978CharactersSelector, CFSTR("kJIS1978CharactersSelector"));
	handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS1983CharactersSelector, CFSTR("kJIS1983CharactersSelector"));
	handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS1990CharactersSelector, CFSTR("kJIS1990CharactersSelector"));
	handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kJIS2004CharactersSelector, CFSTR("kJIS2004CharactersSelector"));
	handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kSimplifiedCharactersSelector, CFSTR("kSimplifiedCharactersSelector"));
	handler(kCharacterShapeType, CFSTR("kCharacterShapeType"), kTraditionalCharactersSelector, CFSTR("kTraditionalCharactersSelector"));
	handler(kTextSpacingType, CFSTR("kTextSpacingType"), kMonospacedTextSelector, CFSTR("kMonospacedTextSelector"));
	handler(kTextSpacingType, CFSTR("kTextSpacingType"), kProportionalTextSelector, CFSTR("kProportionalTextSelector"));
	handler(kRubyKanaType, CFSTR("kRubyKanaType"), kRubyKanaOnSelector, CFSTR("kRubyKanaOnSelector"));
	}

	CFRelease(fontDescriptor);
	CGImageRef image = CGBitmapContextCreateImage(context);
	CGContextRelease(context);
	CFURLRef url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, CFSTR("/Volumes/Data/home/mmaxfield/tmp/output.png"), kCFURLPOSIXPathStyle, FALSE);
	CGImageDestinationRef imageDestination = CGImageDestinationCreateWithURL(url, kUTTypePNG, 1, nullptr);
	CFRelease(url);
	CGImageDestinationAddImage(imageDestination, image, nullptr);
	CGImageRelease(image);
	CGImageDestinationFinalize(imageDestination);
	CFRelease(imageDestination);
	return 0;
	}