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Fonts

Generate the fonts:

  • Make sure you have installed lv_font_conv, and it's in the PATH
    • See doc/buildAndProgram.md
  • run the generate.py script, while in the folder.
    • it has a -h flag to show usage, nontheless: python generate.py fonts.json

How to add new symbols:

  • Browse this cheatsheet and pick symbols
  • For each symbol, add its hex code (0xf641 for the 'Ad' icon, for example) to the Range list (or the symbol list when its simple enough) in the fonts.json file
    • Convert this hex value into a UTF-8 code using this site
  • Define the new symbols in src/displayapp/screens/Symbols.h:
static constexpr const char* newSymbol = "\xEF\x86\x85";

the config file format:

inside fonts, there is a dictionary of fonts, and for each font there is:

  • sources - list of file,range(,symbols) wanted (as a dictionary of those)
  • bpp - bits per pixel.
  • size - size.
  • patches - list of extra "patches" to run, either string to file which should be run, or list of arguments (with first one being the command being run)
  • features - optional. dictionary of extra file,range fonts to be included when the feature is enabled. (for example: a extra language)
  • compress - optional. default disabled. add "compress": true to enable

Navigation font

navigtion.ttf is created with the web app icomoon by importing the svg files from src/displayapp/icons/navigation/unique and generating the font. lv_font_navi_80.json is a project file for the site, which you can import to add or remove icons.