A library that contains a small set of scripts related to working with VTT.
Vttmisc can be called via a build script, or directly from the command line.
$ pip install vttmisc
$ python -m vttmisc [-h] [--fix-offset] [--clear-svtca] [--makeCVAR] -i INPUTPATH [-s VTTPATH] [-d OUTPUT]
Options are as follows:
--clear-svtca
This script clears the "SVTCA[X]" tag from your VTT source files (specifically in the TSI1 table) as these can cause misalignments of diacritical marks. I suggest using this script after autohinting.
--fix-offset
This script overcomes the GID restictions placed in the font due to use of the OFFSET command. It takes a source font, and a new font, and updates the new font with the appropriate GIDs. Please note that this requires a proper relationship between glyph name and GID, such as post table v2, to work properly.
--makeCVAR
This script generates a cvar table based on the TSIC table. Under most circumstances, output matches VTT's identically.*
*If you are doing more complex cvar modification, please double check. Most likely more complicated ones will need to go through VTT or varlib.
Additional settings:
-i input path of new font (required)
-s input path of source VTT font (required for makeCVAR)
-d output path (optional: script will export using a default name if not provided)