Added script to fix anchor regressions for ufos

[m4rc1e]

Fix glyph anchors for Roboto VF.

Script uses lxml since ufoLib rearranges data.

The script will do the following:

1. Deletes anchors used for design puposes e.g making glyphs built with components
2. Renames anchors so no custom MarkWriterFeature is needed for fontmake
3. Ensures each mark glyph only has 1 anchor which starts with an '_'

[m4rc1e]

@cjdunn this will solve our anchor issue. You'll need lxml for this.

before:

• mkmks 43 new
• mkmks 572 modified
• mkmks 10084 missing
• marks 59390 new
• marks 1777 modified
• marks 305575 missing

after:

• mkmks 0 new
• mkmks 42 modified
• mkmks 180 missing
• marks 0 new
• marks 0 modified
• marks 0 missing

mkmk 42 modified: All involve uni1ABB and uni1ABC

left: before, right: after

The sources had duplicate anchors for these glyphs. The script will remove these duplicates and produce the intended positioning.

mkmk 180 missing All involve cedilla, commaaccent, ogonek

These glyphs should not have mkmk positioning. They are not used as combining marks.

roboto_diff.txt

[davelab6]

Thanks Marc, looks like a winner

[cjdunn]

Hi @m4rc1e thanks for sending this, very much appreciated. I ended up re-writing the script to run directly in RoboFont without needing lxml, since I already had functions that do the duplicating, renaming, and removing of anchors. I thought this would be handy to have in this kind of operation has to be done again in the future by myself or another designer.

I updated the anchors for all UFOs and rebuilt the var font, the result is in this fea branch: https://github.com/TypeNetwork/Roboto/pull/10

Please let me know if this works for you, thanks.

*Alternatively, if you'd like to just run your script on the UFOs that's OK with me too.

[davelab6]

Thanks CJ! Will you publish the derived RF script? :)

[davelab6]

Ah I checked the PR and see you did already!! Awesome thanks :))

[cjdunn]

Hi @m4rc1e thank you for your comments here: https://github.com/TypeNetwork/Roboto/pull/10#issuecomment-400248867

I made a new branch:fea-fix-anchors-v2 starting from this commit: https://github.com/TypeNetwork/Roboto/commit/0a0fd4621fa564a0abf8a33227b1c88820c3424c

and ran the fixAnchor script again. Here is the resulting PR: https://github.com/TypeNetwork/Roboto/pull/11

Please let me know if this works any better for you, thanks

[m4rc1e]

Closing as file was included in #11