How to tell if a particular font has a specific glyph >64k

Question

It\'s relatively easy to determine if a particular Unicode font contains a glyph for a code point when the code point fits into a 64 bit value.

if (CTFontGet         


        

Answer 1

This is what I wound up using (where codePoint is the 32 bit code point you want to test for):

    UniChar characters[2];
    CFIndex length = (CFStringGetSurrogatePairForLongCharacter(codePoint, characters) ? 2 : 1);

    CGGlyph glyphs[2];
    if (CTFontGetGlyphsForCharacters(ctFont, characters, glyphs, length)) {
        // It Exists
    }