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Fonts in SerenityOS (draft)

The information in this table is available(and up-to-date) at https://fonts.serenityos.net/.

Family Default for Size Format Serif Monospace Regular Italic Bold Italic Bold Black Author
Ataraxia 10 .font ✔️ ✔️ ✔️ @djwisdom
Cathode 10 .font ✔️ ✔️ @electrikmilk
CJK Biáng 36 .font ? ✔️ ✔️ @Xexxa
Csilla text editor, .txt 10/12 .font ✔️ ✔️ ✔️
Katica system, .html 10/12 .font ✔️ ✔️
Liberation Serif 8-36 .ttf ✔️ ✔️ ✔️ ✔️ ✔️ @mattco98
Liza 10/24/36 .font ✔️ ✔️ ✔️ ✔️
Lucidity 12 .font ✔️ ✔️ @djwisdom
Marieta 24/36 .font ✔️ ✔️ @thankyouverycool
Pabbleton 14 .font ✔️ ✔️
Roman 10 .font ✔️ ✔️ @electrikmilk
Satori 10 .font ✔️ ✔️ @djwisdom
Satori Mono 10 .font ✔️ ✔️ ✔️ @djwisdom
SerenitySans 8-36 .ttf ✔️ @sunverwerth
Serifina 10 .font ✔️ ✔️ @thankyouverycool
Source 10 .font ✔️ ✔️ @electrikmilk
Tiny 6 .font ✔️ @Xexxa

Creating a font

  • Read our quick intro to using FontEditor at (https://wiki.serenityos.net/FontEditor/UsingFontEditor.html)

  • Mandatory glyphs Always include character FFFD � (https://www.unicode.org/charts/PDF/UFFF0.pdf), it's the fallback character if a glyph is missing.

  • Filename: Give the font a filename in the following format NameStylePresentationSize.ext (examples: KaticaRegular10.font)

  • Metadata: metadata.family contains the fonts "name", for example "Katica". metadata.name contains the font "name" and style, for example "Katica Regular".

  • CJK: If the font is primarly or exclusively for CJK characters then prefix metadata.family and metadata.name with CJK and space. "CJK Name" & "CJK Name Style"

  • Constructed/artificial scripts: If you want to encode for example Klingon or Tengwar, then follow the assignments of UCSUR1

  • Unicode charts: Always check the Unicode charts if you do not know a script by heart. There is often useful information about the glyphs (similar glyphs for reference or if a glyph is based on another). How to read the symbols in Unicode Charts
    Screenshot from Unicode charts

Unicode PUA usage

  • If you want to add glyphs to Unicodes PUA(private use area) for use in SerenityOS, pick codepoints within the range 10CA00-10CFFF.

  • Currently reserved ranges:

Practical

Commits and pull requests

  • Before making a PR / Merge conflicts: You can copy multiple glyphs in font editor(shift click to select a range), it is recommended that you have the habit of copying the glyphs you added/modified to a fresh pull of the font-file and look for conflicting pull request before creating a PR. There has been a few cases of merge conflicts and outdated font-files removing glyphs.

  • Commit: Always include the codepoints for the glyphs you added or modified. Modified glyphs should also include how/why they were modified.

  • PR: A screenshot of what you added/edited makes it easier for maintainers to review your fantastic work.

Working with CJK (Chinese, Japanese and Korean)

  • Katica: currently glyphs with multiple variants in Katica uses simplefied Chinese, if that is not available it uses suitable Chinese with a G*-code2.

  • CJK Biáng: currently glyphs with multiple variants in CJK Biáng uses traditional Chinese.

General design guidelines

Testing a script

A good sample text for testing (especially rarer) scripts is the Universal Declaration of Human Rights (UDHR), there are 487 translations at https://unicode.org/udhr/ (unicode), the sample could then if needed be compared to one of the 530 translations available at https://www.ohchr.org/EN/UDHR/Pages/SearchByLang.aspx (pdf, html, sound).

Emojis

  • Emojis are located in Base/res/emoji/ (repo) and /res/emoji (running SerenityOS)

  • New emoji should be added to emoji.txt. New emojis are no longer required to be added to emoji.txt. This is automatically handled by a script during CI run.

  • Emoji has the filename U+{hex code}.png, eg. U+1F332.png, emoji with multiple codepoints is separated with underscore, eg. U+1F1EE_U+1F1F8.png

  • Emoji presentation selectors(U+FE0F) has to be excluded from the filename of emoji with multiple codepoints #14917 Polar Bear 🐻‍❄️ with the codepoints U+1F43B U+200D U+2744 U+FE0F gets the filename U+1F43B_U+200D_U+2744.png

  • The size of emoji is 7 px width and always 10 px height. Some kind of agreement was reached in #fonts to allow the width to be 7px, 8px, 9px, 10px when needed for complex emoji but the goal is to keep it 7x10 if possible.

  • Emoji shall be optimized to remove unneccesarry meta-data, optipng -strip all is recommended. (This does on occation render the emoji unvieweble in SerenityOS so it might be a good idea to check before making a PR!) (Fixed in SerenityOS/serenity#14910)

  • Emojis are system-wide, no matter what font is used.

  • There are currently issues with glyphs in the .font taking precedent over emojis and with Emoji picker(not all emojis showing).

  • The commit message when adding emoji should contain the glyph, name and codepoint. You can automatically generate these with Meta/generate-emoji-txt.sh Build/i686/UCD/emoji-test.txt /folder/to/the/emoji/you/have/made /the/file/you/want/the/list/of/emoji/in/the/right/format/commit.txt

  • Flag emoji: The visible part should, unlike the other emoji, be 10x7 if possible with transparant padding on the y-axis. Some flags is more suitable as 9x7, 10x6, etc. Some flexability is allowed.

image

A 10x7 flag in a 10x10 canvas

Trivia

Katicabogárfélék is Hungarian for ladybug.

Links

Unicode charts [unicode.org]

SerenityOS Discord #fonts

Using our font in Browser

References

Footnotes

  1. Under-ConScript Unicode Registry ↩

  2. Wikipedia: CJK Unified Ideographs ↩