GitHub - atgreen/cadr-mono: A monospace typeface for terminals and code, generated from Common Lisp. 935 glyphs, two grades, box drawing and braille computed from the cell.

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A monospace typeface for terminals and code, generated from Common Lisp. 935 glyphs · 8 static fonts · OFL 1.1

CADR Mono in a terminal: git, a diff, box drawing, braille meters and source

Every glyph is a pure function of the parameters in src/params.lisp. There are no drawn outlines and no font editor in the loop.

Install

Hinted TTFs are in fonts/.

cp fonts/*.ttf ~/.local/share/fonts/ && fc-cache -f     # Linux
cp fonts/*.ttf ~/Library/Fonts/                         # macOS

On Windows, select the eight files, right-click, Install for all users.

Set CADR Mono on a light theme or CADR Mono Dark on a dark one. A running terminal won't see a newly installed font — restart it.

Features

  • A dark-background grade. CADR Mono Dark has ink removed for light-on-dark — stem 164 against 180 — with identical advances and vertical metrics, so swapping never reflows a column.

  • Box drawing, blocks and braille are computed from the cell. Rules reach the cell edges and meet across the boundary, junction arms overrun by half the crossing rule's weight, braille dots sit at advance/4.

  • Box drawing and braille don't slope in the italic, so an italic terminal still draws a straight box.

  • The italic is drawn. Six letters are reshaped: a goes single-storey, f gains a descender, and k, v, w and y are redrawn.

  • Powerline separators are generated, U+E0B0–U+E0BF, from the same cell metrics as the box drawing.

  • Hinted with ttfautohint. At 13px a whole pixel is 158 units and the horizontal stroke is 147. Above 13px the instructions hurt, and hintslight ignores them entirely.

Coverage

935 glyphs, every one at advance 1229 on a 2048 em.
ASCII 95/95 Latin-1 96/96 Latin Ext 94 Greek 70
Cyrillic 94 Box + blocks 160/160 Braille 256/256 Powerline 16/16
Math 28 Punctuation 15

39 European languages set correctly, tested per language against the characters each needs. Latin Extended covers Polish, Czech, Slovak, Hungarian, Romanian, Croatian, Slovenian, Serbian, Latvian, Lithuanian, Estonian, Turkish, Maltese and Welsh. Greek carries the monotonic accents. Cyrillic covers Russian, Ukrainian, Belarusian, Bulgarian, Serbian and Macedonian.

No programming ligatures.

The eight fonts

Regular Italic Bold Bold Italic
CADR Mono ✓ ✓ ✓ ✓
CADR Mono Dark ✓ ✓ ✓ ✓

Family carries the grade, style carries slope and weight.

Nerd Font

make -f build/Makefile nf        # -> fonts-nf/, "CADR Mono NF" and "… NF Dark"

11,130 codepoints, 2.2 MB a font. Not in fonts/ and not in git. Icon sources are vendored in src/nerdfont/, pinned to Nerd Fonts v3.5.1. Font Logos and Pomicons are omitted — see the licence note below — so a build from here is 145 glyphs short of an official Nerd Font.

Licence

SIL Open Font License 1.1, with no Reserved Font Name.

The Nerd Font build is the exception: its icons come from eleven upstream sets under MIT, CC BY 4.0, Apache 2.0 and OFL 1.1, and all of them require attribution. Ship src/nerdfont/LICENSES/ with any build you distribute. Font Logos is marked unlicensed upstream and Pomicons' licence and metadata contradict each other, so neither is vendored here.

Designed and written by Anthony Green. Built with fontmake, ttfautohint and SBCL.