mhosken 7a0c5e1ca2 Add fea generation support (#776)
* First round of adding fea output

No format tests but all test files give reasonable output so far.

* Get existing tests working

* Initial tests that work for fea2fea

* Get more tests working

Bug fixes and re-layout some tests to compare with fea2fea output.
Ranges and name parameters are not optimised yet.

* Handle vertical default values in fea2fea

* Hide fea2fea differences in lookupflags

* No reduce() in py3 so use a for loop
2016-12-20 11:10:29 +01:00

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# OpenType Feature File specification, section 5.d, example 2.
# http://www.adobe.com/devnet/opentype/afdko/topic_feature_file_syntax.html
# A contiguous set of ligature rules does not need to be ordered in
# any particular way by the font editor; the implementation software
# must do the appropriate sorting.
# So:
feature F1 {
sub f f by f_f;
sub f i by f_i;
sub f f i by f_f_i;
sub o f f i by o_f_f_i;
} F1;
# will produce an identical representation in the font as:
feature F2 {
sub o f f i by o_f_f_i;
sub f f i by f_f_i;
sub f f by f_f;
sub f i by f_i;
} F2;
# In the resulting OpenType GSUB table (spec5d2.ttx),
# we expect to see only one single lookup.