Triodion is a contemporary Church Slavonic font that reproduces the typeface most commonly used in liturgical books published in St. Petersburg and Moscow at the end of the 19th and beginning of the 20th century and the current editions printed in Moscow by the Publishing House of the Moscow Patriarchate.
As far as is known, Triodion was created for the Irmologion project by Vlad Dorosh as Triodion Ucs (version 1, 2003) and was then released under the LaTeX Project Public License as part of CSLTeX. Reencoded for Unicode by Aleksandr Andreev as part of the Slavonic Computing Initiative and edited, released under SIL OFL v. 1.1. Edited by Aleksandr Andreev for Google Fonts.
This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is available with a FAQ at https://openfontlicense.org/.
The font is built using fontmake and gftools post processing script. Tools are all python based, so it must be previously installed.
To install all the Python tools into a virtualenv, do the following:
From terminal:
cd your/local/project/directory
#once in the project folder create a virtual environment.
This step has to be done just once, the first time:
python3 -m venv venv
#activate the virtual environment
source venv/bin/activate
#install the required dependencies
pip install -r requirements.txt
Then run the this command:
cd sources
gftools builder config.yaml
The fonts are supposed to build automatically in the repository using GitHub Actions, but this does not work correctly, presumably because of bugs on Google's part.
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Stylistic Set 1 (ss01) changes the hyphen symbol (-) to an underscore (_), which is the default hyphenation symbol used in Synodal Church Slavonic. This can be used for software such as LibreOffice that does not support changing the default hyphenation character.
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Stylistic Alternatives (salt) are provided for the following characters:
- a short version of lowercase yat (U+0463)
- an alternative form of capital omega (U+0460)
- seven alternative forms of the Symbol for Mark's Chapter (U+1F545)
See your software's documentation about how to access these glyphs.
See the main repository and the website.