[XeTeX] List of ligatures in a font

[Tobias Schoel]

Could one test if ff and f\/f are equal with tex-primitives?

On 14.03.2012 19:24, mskala at ansuz.sooke.bc.ca wrote:
> On Wed, 14 Mar 2012, d fulano wrote:
>> how do I determine what are the "standard ligatures" in a font?It is not
>> obvious (especially for non-English languages), and they can also vary
>> in each font.  Basically what I want to do is this:I can very quicky
>
> It will be tricky with OpenType fonts that have context-sensitive
> ligatures, because there may be many different sequences of input glyphs
> that activate a given output glyph, and the input sequences can be
> described in the font file in terms of matching patterns rather than a
> (potentially prohibitively long) explicit list of input sequences.  If you
> think you can guess the input sequence by looking at the output glyph (as
> will be possible in many cases for Latin script), then you could simply
> list the output glyphs and not worry about reverse-engineering the tables
> to find the inputs; but that won't be a good assumption in the case of,
> for instance, jamo layout changes in Korean.  Stuff like arbitrary-length
> fractions implemented by ligature-like substitution will give you a hard
> time as well.