[XeTeX] on GSUB

[Adam Twardoch]

Jonathan Kew wrote:
 > Meanwhile, I would suggest asking the GFS people to rebuild their  
 > OpenType fonts without this operator; and if tools like Fontforge or  
 > FontLab generate it in Type 2 charstrings, then suggest to the tool  
 > authors that they should be using subroutines instead. (Expecting the  
 > font designer to decompose composites within the design tool is  a  
 > poor workaround.)

I agree that it's a poor workaround. This is why FontLab Studio 5 has 
options to decompose composites automatically when generating OpenType 
PS fonts, and to use subroutines to compress the CFF table. Both these 
options are on by default. In other words, by default, FontLab Studio 5 
builds OpenType PS fonts using subroutines and without using seac. The 
font developer is able to change this behavior if he/she really wants 
but the user's manual definitely recommends to leave the "decompose 
composites" option on for OpenType PS fonts.

Adam Twardoch
Fontlab Ltd.

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Adam Twardoch
http://www.twardoch.com/