Fonts

Generate the fonts:

Open the LVGL font converter
Enter the settings for the font that you wish to convert
Click on Convert, download the file and place it in src/DisplayApp/Fonts

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 (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";

Small font

Name: jetbrains_mono_bold_20
Size: 20
Bpp: 1 bit-per-pixel
Do not enable font compression or horizontal subpixel rendering
Load the file JetBrainsMono-Bold.tff (use the file in this repo to ensure the version matches) and specify the following range : 0x20-0x7e, 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, 0xf072
Fix an error in the font conversion.

Replace the following:

/* U+0030 "0" */
0x3f, 0x1f, 0xef, 0x3f, 0x87, 0xe1, 0xf8, 0x7f,
0xdf, 0xf7, 0xe1, 0xf8, 0x7e, 0x1f, 0xcf, 0x7f,
0x8f, 0xc0,

with

/* U+0030 "0" */
0x3f, 0x1f, 0xef, 0x3f, 0x87, 0xe1, 0xf8, 0x7e,
0xdf, 0xb7, 0xe1, 0xf8, 0x7e, 0x1f, 0xcf, 0x7f,
0x8f, 0xc0,

(there are two changes: 7f -> 7e and f7 -> b7)

Medium font

Name: jetbrains_mono_42
Size: 42
Bpp: 1 bit-per-pixel
Do not enable font compression or horizontal subpixel rendering
Load the file JetBrainsMono-Regular.tff (use the file in this repo to ensure the version matches) and specify the following range : 0x25, 0x30-0x3a

Large font

Name: jetbrains_mono_76
Size: 76
Bpp: 1 bit-per-pixel
Do not enable font compression or horizontal subpixel rendering
Load the file JetBrainsMono-Regular.tff (use the file in this repo to ensure the version matches) and specify the following range : 0x25, 0x2D, 0x2F, 0x30-0x3a

PineTimeStyle font

Name : open_sans_light
Size : 150
Bpp : 1 bit-per-pixel
Do not enable font compression or horizontal subpixel rendering
Load the file open_sans_light.tff (use the file in this repo to ensure the version matches) and specify the following symbols : 0123456789

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 create 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

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