edwardtufte/et-book

OpenType

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#3 opened on Sep 26, 2015

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enhancementhelp wanted

Description

The lining figures and text figures versions of the font could be rolled into single font files containing both, using OpenType features to select between the two. (The features lnum and onum in particular.)

Likewise the small-capitals fonts (smcp and c2sc) and ‘expert set’ (mapped to the correct Unicode codepoints) included in the originals.zip file in the source directory can be merged into the main files of the typeface using the OpenType format.

Then, once the last few browsers support it, webfont users could enable these using the standard font-feature-settings CSS property.

Contributor guide

Tech stack
css
Domain
frontenddesign
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Understanding OpenType features (lnum, onum, smcp, c2sc)Font editing tool (FontForge, fonttools)CSS font feature settings propertyAccess to source font files in originals.zip
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate how to combine the lining and text figures into a single font file using OpenType features lnum and onum. Similarly, merge the small capitals fonts (using smcp and c2sc) and the 'expert set' into the main font files. The source font files are in the 'originals.zip' in the repository. After merging, update the web font files and provide CSS examples using font feature settings. Review any existing build scripts or font editing tools used in the repo, and read the issue comments for additional context.