Re: Finding a Font to Support a Unicode Block (X11)

Michael Rohan wrote:
> Hi Folks,
> 
> Just posted this to comp.fonts, but figured I should try here also.
> 
> Not sure if this is the correct group, but I have code that generated
> Unicode strings displayed via Java on X Windows.  The strings include
> characters from the Enclosed Alphanumerics Unicode block.

Font-config can do this, though its documentation, API, and command-line
interface are all rather inscrutable.  I wrote a program that can take
any character as input and give you the filename of a font with it.

Just put the two files anywhere, then:

make
./CharSearch ①

I.e. put the character you're looking for as the first and only
argument.  Only tested with en_US.UTF-8 as LANG environment variable.

Matt Flaschen

#include "fontconfig.h"
#include <stdio.h>
#include <locale.h>
#include <wchar.h>
#include <malloc.h>
#include <string.h>

int main(int argc, FcChar8 *argv[]) 
{
     if(argc < 2)
     {
	  fwprintf(stderr, L"Usage: %s c\n", argv[0]);
	  fwprintf(stderr, L"c is the char to search for.\n");
	  return -1;
     }
     
     FcChar8 *pMyChar8 = argv[1];
     FcChar32 myChar32;
     
     FcUtf8ToUcs4(pMyChar8, &myChar32, strlen(pMyChar8));

     FcConfig *myConfig = FcInitLoadConfigAndFonts();
     
     FcCharSet *myCharset = FcCharSetCreate();
     FcCharSetAddChar(myCharset, myChar32);
     FcPattern *myPattern = FcPatternBuild(0, FC_CHARSET, FcTypeCharSet, myCharset, (char *) 0);
     FcConfigSubstitute(myConfig, myPattern, 0);
     FcDefaultSubstitute(myPattern);
     FcResult *result;
     
     FcPattern *foundPattern = FcFontMatch(myConfig, myPattern, result);

     FcCharSet *foundCharSet;

     char * filename;
     int filenameLen, filenameMax;

     FcPatternGetString(foundPattern, "file", 0, &filename);
     FcPatternGetCharSet(foundPattern, FC_CHARSET, 0, &foundCharSet); 

     if(FcCharSetHasChar(foundCharSet, myChar32) == FcTrue)
     {
       wprintf(L"Font file %s contains '%lc'.\n", filename, myChar32);
     }
}

CC=gcc
CFLAGS=--std=c99 -I /usr/include -I /usr/include/fontconfig -L /usr/lib/ -l fontconfig
OBJ=CharSearch

CharSearch: CharSearch.c
	${CC} ${CFLAGS} CharSearch.c -o ${OBJ}

clean:
	rm ${OBJ}

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