Comment 2 for bug 664722
Revision history for this message
| Paul Sladen (sladen) wrote Re: missing kerning pairs for ď+vowels in bold | #2 |
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(Get the code!)
Hello Petr,
The reason for this is that there are two kerning tables, and the older type ('kern') has a limited fixed size (~50,000 pairs). There is not enough room to have every character vs. every character in the first table, so just the basic Latin-based kerns are entered into the first table.
The second table uses a class-based system and can contain the whole-set.
On einteresting research project might be trying to cram the largest possible number of kerns into the first table (depending on available space), based on some statistical analysis of kern-use frequency/visual impact of the full kerning set.