CoreText Typography - Ligatures

[build 0051] The great fight with text is slowly coming to a close. I have a few outstanding bugs before I move on to editable text but I can see the end.

Ligatures appear correctly in the output.
Having spent some time looking into glyphs and glyph codes ligatures are the easiest test case for non-standard glyphs because it is possible to type in normal letters like "f" and "i" in the PC version of Cello, save the file, open them under OSX and then to let the CoreText layout transform the pair into a ligature during normal line layout. My conjecture is that the treatment of ligatures will prove a reasonable test case for non-standard glyphs (e.g. various alternate character forms) in general. As Cello shapes up more it will be possible to test this further.

If you are interested in typography here is a link to SIL International has some good information here.