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3 Commits

Author SHA1 Message Date
Sascha Brawer
96da5a0f71 Support TTX format for MultipleSubst of FontTools 3.0 and earlier 
Fix a backwards compatibility problem introduced by
1356a6775b
(pull request https://github.com/behdad/fonttools/pull/364), where new versions
of FontTools would not be able to process `<MultipleSubst>` elements
in TTX files generated by older FontTools releases.

Resolves https://github.com/behdad/fonttools/issues/355.
 2015-09-11 08:19:20 +02:00
Sascha Brawer
1356a6775b [otTables] Simplify API for MultipleSubst 
Resolves https://github.com/behdad/fonttools/issues/355

For making sure that `pyftsubset` still works after this change,
I have done the following steps:

* invoked Adobe's `makeotf` tool to build a custom font with a
  MultipleSubst lookup. This lookup decomposes two two ligatures,
  `c_t` and `f_f_i`, into their respective components.

* invoked the `pyftsubset` tool to produce a subset font with just
  the `c_t` ligature;

* checked with `ttx` that the newly produced subset font contains
  the requested `c_t` ligature and its components `c` and `t`,
  but does not contain not any of `f_f_i`, `f`, or `i`.
 2015-09-10 14:56:07 +02:00
Sascha Brawer
8d8288a862 [otTables] Add unit tests for SimpleSubst, LigatureSubst and AlternateSubst 2015-09-10 10:05:23 +02:00