InfiniTime/src/displayapp/fonts/README.md

Fonts

• Jetbrains Mono
• Awesome font from LVGL
• Open Sans Light from Google

Generate the fonts:

• Open the LVGL font converter
• Name : jetbrains_mono_bold_20
• Size : 20
• Bpp : 1 bit-per-pixel
• Do not enable font compression and horizontal subpixel hinting
• Load the file JetBrainsMono-Bold.tff (use the file in this repo to ensure the version matches) and specify the following range : 0x20-0x7f, 0x410-0x44f
• Add a 2nd font, load the file FontAwesome5-Solid+Brands+Regular.woff and specify the following range : 0xf293, 0xf294, 0xf244, 0xf240, 0xf242, 0xf243, 0xf241, 0xf54b, 0xf21e, 0xf1e6, 0xf54b, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf069, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf029, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024, 0xf252, 0xf569, 0xf201, 0xf06e, 0xf015
• Click on Convert, and download the file jetbrains_mono_bold_20.c and copy it in src/DisplayApp/Fonts
• Add the font .c file path to src/CMakeLists.txt
• Add an LV_FONT_DECLARE line in src/libs/lv_conf.h

Add new symbols:

• Browse the cheatsheet and find your new symbols
• For each symbol, add its hex code (0xf641 for the 'Ad' icon, for example) to the Range list (Remember to keep this readme updated with newest range list)
• 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";

Simple method to generate a font

If you want to generate a basic font containing only numbers and letters, you can use the above settings but instead of specifying a range, simply list the characters you need in the Symbols field and leave the range blank. This is the approach used for the PineTimeStyle watchface. This works well for fonts which will only be used to display numbers, but will fail if you try to add a colon or other punctuation.

• Open the LVGL font converter
• Name : open_sans_light
• Size : 150
• Bpp : 1 bit-per-pixel
• Do not enable font compression and horizontal subpixel hinting
• Load the file open_sans_light.tff (use the file in this repo to ensure the version matches) and specify the following symbols : 0123456789
• Click on Convert, and download the file open_sans_light.c and copy it in src/DisplayApp/Fonts
• Add the font .c file path to src/CMakeLists.txt (search for jetbrains to find the appropriate location/format)
• Add an LV_FONT_DECLARE line in src/libs/lv_conf.h (as above)

Navigation font

To create the navigtion.ttf I use the web app icomoon this app can import the svg files from the folder src/displayapp/icons/navigation/unique and creat a ttf file the project for the site is lv_font_navi_80.json you can import it to add or remove icons

You can also use the online LVGL tool to create the .c

ttf file : navigation.ttf name : lv_font_navi_80 size : 80px Bpp : 2 bit-per-pixel range : 0xe900-0xe929

$lv_font_conv --font navigation.ttf -r '0xe900-0xe929' --size 80 --format lvgl --bpp 2 --no-prefilter -o lv_font_navi_80.c

I use the method above to create the other ttf