Compare FT and OSX font weights for a font

whatsthefont-files-slant.c

#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>

int
main(int argc, char** argv)
{
  if (argc == 2) {
    char* filepath = *(argv+1);

    CFStringRef cffilepath = CFStringCreateWithCString(NULL, filepath, kCFStringEncodingUTF8);
    CFURLRef url = CFURLCreateWithFileSystemPath(NULL, cffilepath, kCFURLPOSIXPathStyle, false);
	CFArrayRef descs = CTFontManagerCreateFontDescriptorsFromURL(url);
	CTFontDescriptorRef desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, 0);


    CFDictionaryRef dict = CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
    CFNumberRef cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontSymbolicTrait);
    double value;
	CTFontSymbolicTraits traitsval;

    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberSInt32Type, &traitsval)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("traits 0x%X ", traitsval);
    } else printf("traits N/A ");
	cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontSlantTrait);
    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("slant %f ", value);
    } else printf("slant N/A ");

      printf("%s\n", filepath);
  }
}

whatsthefont-files-stretch.c

#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>

int
main(int argc, char** argv)
{
  if (argc == 2) {
    char* filepath = *(argv+1);

    CFStringRef cffilepath = CFStringCreateWithCString(NULL, filepath, kCFStringEncodingUTF8);
    CFURLRef url = CFURLCreateWithFileSystemPath(NULL, cffilepath, kCFURLPOSIXPathStyle, false);
	CFArrayRef descs = CTFontManagerCreateFontDescriptorsFromURL(url);
	CTFontDescriptorRef desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, 0);


    CFDictionaryRef dict = CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
    CFNumberRef cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontWidthTrait);
    double value;

    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("%f %s\n", value, filepath);
    } else printf("N/A %s\n", filepath);
  }
}

whatsthefont-files.c

#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_TRUETYPE_TABLES_H
#include FT_SFNT_NAMES_H
#include FT_TRUETYPE_IDS_H
#ifndef FT_SFNT_OS2
#define FT_SFNT_OS2 ft_sfnt_os2
#endif

int
main(int argc, char** argv)
{
  if (argc == 2) {
    char* filepath = *(argv+1);
    FT_Library library;
    FT_Face face;

    CFStringRef cffilepath = CFStringCreateWithCString(NULL, filepath, kCFStringEncodingUTF8);
    CFURLRef url = CFURLCreateWithFileSystemPath(NULL, cffilepath, kCFURLPOSIXPathStyle, false);
	CFArrayRef descs = CTFontManagerCreateFontDescriptorsFromURL(url);
	CTFontDescriptorRef desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, 0);


    CFDictionaryRef dict = CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
    CFNumberRef cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontWeightTrait);
    double value;

    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      if (!FT_Init_FreeType(&library) && !FT_New_Face(library, (const char*)filepath, 0, &face)) {
        TT_OS2* table = (TT_OS2*)FT_Get_Sfnt_Table(face, FT_SFNT_OS2);
        printf("%u %f\n", table->usWeightClass, value);
      }
    }
  }
}

whatsthefont-impact.c

#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_TRUETYPE_TABLES_H
#include FT_SFNT_NAMES_H
#include FT_TRUETYPE_IDS_H
#ifndef FT_SFNT_OS2
#define FT_SFNT_OS2 ft_sfnt_os2
#endif

int
main(int argc, char** argv)
{
char b[100];
printf("%d\n",getpid());
read(0,b,100);
    const char* filepath = "/Library/Fonts/Impact.ttf";
    FT_Library library;
    FT_Face face;

    CFStringRef cffilepath = CFStringCreateWithCString(NULL, filepath, kCFStringEncodingUTF8);
    CFURLRef url = CFURLCreateWithFileSystemPath(NULL, cffilepath, kCFURLPOSIXPathStyle, false);
	CFArrayRef descs = CTFontManagerCreateFontDescriptorsFromURL(url);
	CTFontDescriptorRef desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, 0);


    CFDictionaryRef dict = CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
    CFNumberRef cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontWeightTrait);
    double value;

    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      if (!FT_Init_FreeType(&library) && !FT_New_Face(library, (const char*)filepath, 0, &face)) {
        TT_OS2* table = (TT_OS2*)FT_Get_Sfnt_Table(face, FT_SFNT_OS2);
        printf("%u %f\n", table->usWeightClass, value);
      }
    }
}

whatsthefont-slant.c

// modified by pietro gagliardi 23 december 2016
#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>

char filepath[1024];

int
main(int argc, char** argv)
{
	CTFontCollectionRef fc;
	CFArrayRef descs;
	CFIndex i, n;

	fc = CTFontCollectionCreateFromAvailableFonts(NULL);
	descs = CTFontCollectionCreateMatchingFontDescriptors(fc);
	n = CFArrayGetCount(descs);
	for (i = 0; i < n; i++) {
		CTFontDescriptorRef desc;
		CFNumberRef cfnumber;

		desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, i);

    CFStringRef cffilepath = (CFStringRef) CTFontDescriptorCopyAttribute(desc, kCTFontDisplayNameAttribute);
	CFStringGetCString(cffilepath, filepath, 1024, kCFStringEncodingUTF8);


    CFDictionaryRef dict = (CFDictionaryRef) CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
	cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontSymbolicTrait);
    double value;
	CTFontSymbolicTraits traitsval;


    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberSInt32Type, &traitsval)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("traits 0x%X ", traitsval);
    } else printf("traits N/A ");
	cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontSlantTrait);
    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("slant %f ", value);
    } else printf("slant N/A ");

      printf("%s\n", filepath);
	}

	return 0;
}

whatsthefont-stretch.c

// modified by pietro gagliardi 23 december 2016
#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>

char filepath[1024];

int
main(int argc, char** argv)
{
	CTFontCollectionRef fc;
	CFArrayRef descs;
	CFIndex i, n;

	fc = CTFontCollectionCreateFromAvailableFonts(NULL);
	descs = CTFontCollectionCreateMatchingFontDescriptors(fc);
	n = CFArrayGetCount(descs);
	for (i = 0; i < n; i++) {
		CTFontDescriptorRef desc;
		CFNumberRef cfnumber;

		desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, i);

    CFStringRef cffilepath = (CFStringRef) CTFontDescriptorCopyAttribute(desc, kCTFontDisplayNameAttribute);
	CFStringGetCString(cffilepath, filepath, 1024, kCFStringEncodingUTF8);


    CFDictionaryRef dict = (CFDictionaryRef) CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
	cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontWeightTrait);
    double value;


    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("weight %f ", value);
    } else printf("weight N/A ");
	cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontWidthTrait);
    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      printf("width %f ", value);
    } else printf("width N/A ");

      printf("%s\n", filepath);
	}

	return 0;
}

whatsthefont.c

// modified by pietro gagliardi 23 december 2016
#include <CoreFoundation/CoreFoundation.h>
#include <CoreGraphics/CoreGraphics.h>
#include <CoreText/CoreText.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_TRUETYPE_TABLES_H
#include FT_SFNT_NAMES_H
#include FT_TRUETYPE_IDS_H
#ifndef FT_SFNT_OS2
#define FT_SFNT_OS2 ft_sfnt_os2
#endif

char filepath[1024];

int
main(int argc, char** argv)
{
	CTFontCollectionRef fc;
	CFArrayRef descs;
	CFIndex i, n;

	fc = CTFontCollectionCreateFromAvailableFonts(NULL);
	descs = CTFontCollectionCreateMatchingFontDescriptors(fc);
	n = CFArrayGetCount(descs);
	for (i = 0; i < n; i++) {
		CTFontDescriptorRef desc;

		desc = (CTFontDescriptorRef) CFArrayGetValueAtIndex(descs, i);

    FT_Library library;
    FT_Face face;

	CFNumberRef cfnumber = (CFNumberRef) CTFontDescriptorCopyAttribute(desc, kCTFontFormatAttribute);
	UInt32 fmt;
	CFNumberGetValue(cfnumber, kCFNumberSInt32Type, &fmt);
	switch (fmt) {
	case kCTFontFormatTrueType:
	case kCTFontFormatOpenTypeTrueType:
		break;
	default:
		continue;
	}

    CFURLRef url = (CFURLRef) CTFontDescriptorCopyAttribute(desc, kCTFontURLAttribute);
	CFStringRef cffilepath = CFURLCopyPath(url);
	CFStringGetCString(cffilepath, filepath, 1024, kCFStringEncodingUTF8);

    CFDictionaryRef dict = (CFDictionaryRef) CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute);
	cfnumber = (CFNumberRef)CFDictionaryGetValue(dict, kCTFontWeightTrait);
    double value;

	CTFontRef font = CTFontCreateWithFontDescriptor(desc, 0, NULL);
	CFDataRef cftable = CTFontCopyTable(font, kCTFontTableOS2, 0);

    if (cfnumber != NULL && CFNumberGetValue(cfnumber, kCFNumberCGFloatType, &value)) {
      CFNumberGetValue(cfnumber, kCFNumberFloat64Type, &value);
      if (cftable != NULL) {
        TT_OS2* table = (TT_OS2*)CFDataGetBytePtr(cftable);

	if (table != NULL)
        printf("%u %f %s\n", CFSwapInt16BigToHost(table->usWeightClass), value, filepath);
	else
	printf("N/A %f %s\n", value, filepath);
      }
    }

	}

	return 0;
}