t-sin/cl-system-font

Platform font settings abstraction library for Common Lisp

cl-system-font

DON'T USE THIS!!! USE this font-discovery library!!!

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cl-system-font is a simple accessor library for font configurations on your systems.

Requirements

• GNU/Linux or POSIX systems: fontconfig
  • tested on Ubuntu 22.04 LTS
• mac OS: CoreText API via a Swift script
  • tested on macOS 13.5 Ventura
• Windows: System.Drawing API and System.Windows.Media API via a PowerShell script
  • tested on Windows 10 with PowerShell 5.1

Usage

To get all fonst installed on your system, do this:

CL-USER> (sysfont:list-fonts)
...

Font infomation are includes these items:

• font file pathname
• font file format (as a string)
• font name string
• font families (this may be multiple values)
• font styles (this may be multiple values)
• if this font is monospaced?
• supported languages (this may be multiple values)

References

• UNIX/Linux: fontconfig
  • fc-list's default format is %{=fclist}
  • fclist is described here
  • fclist format is %{?file{%{file}: }}%{-file{%{=unparse}}}
  • unparse is generated here
• MacOS: system_profiler
  • https://apple.stackexchange.com/questions/35852/list-of-activated-fonts-with-shell-command-in-os-x
    • cannot get font spacing and supported languages, in this way
    • font styles maybe localized in system langauges
  • Swift's CoreText interface may allow us to get more information
    • https://developer.apple.com/documentation/coretext
• Windows
  • https://superuser.com/questions/760627/how-to-list-installed-font-families
  • https://social.msdn.microsoft.com/Forums/windows/en-US/5b582b96-ade5-4354-99cf-3fe64cc6b53b/determining-if-font-is-monospaced?forum=winforms

Author

• t-sin (shinichi.tanaka45@gmail.com)

License

MIT license