I'm trying to learn a little more about fonts on my Linux box
for use with xsl-fo.
My current problem is trying to find out if a Unicode code point is
present in any given font.
fc-query dumps a (btree?) list of the code points supported (AFAICT).
I'm looking for a way of testing if U+1234 is present in font xxx.otf
so that I give a yes/no if the code point is present in this font?k
I can capture the charset: section of fc-query output
but I'm looking for an algorithm /explanation of the format of the section?
E.g for one of my fonts...
charset:
0000: 00000000 ffffffff ffffffff 7fffffff 00000000 ffffdfef
bfffffff bfffffff
0001: 00000000 00020000 000c0006 61000003 00040000 00000000
00000000 00000000
0002: 00000000 00000000 00000000 00000000 00000000 00000000
3f0000c0 00000000
0003: 00000000 00000000 00000000 00000000 00000000 00000200
00000001 00000000
0020: 77180000 06010047 00000010 00000000 00000000 00001000
00000000 00000000
0021: 00000000 00000004 00000000 00000000 00000000 00000000
00000000 00000000
0022: 44068044 00000800 00000100 00000031 00000000 00000000
00000000 00000000
0025: 00000000 00000000 00000000 00000000 00000000 00000000
00000400 00000000
00fb: 00000006 00000000 00000000 00000000 00000000 00000000
00000000 00000000
Any pointers as to how to interpret this would be appreciated.
I've pulled the fontconfig source... but my C is 30 years old and rusty.
>From the docs directory I read in FcCharSetHasChar.3
"FcCharSetHasChar \- Check a charset for a char"
(code
FcBool
FcCharSetHasChar (const FcCharSet *fcs, FcChar32 ucs4))
Is that the functionality I need please?
tia
--
Dave Pawson
XSLT XSL-FO FAQ.
Docbook FAQ.
http://www.dpawson.co.uk
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