Fonts

Normally fonts would be defined in globals.xml in order to make them available to all components in your UI.

If a TTF font file is more than you need in your application, or taking too much memory, you can limit the range of characters included in your application by importing it as binary, and specify the range using the same syntax as the LVGL font converter. Here are 2 examples using at TTF file and converting it to a C array with limited character ranges.

The following example demonstrates including fonts with a limited range of glyphs to reduce the application's program-size footprint:

<fonts>
    <bin name="font_hour_32" size="32" bpp="4" as_file="false" range="0x20-0x7F" symbols="" src_path="fonts/Inter_28_Bold.ttf"/>
    <bin name="inter_28" size="28" bpp="4" as_file="false" range="0x20-0x7F" symbols="" src_path="fonts/Inter_28_Bold.ttf"/>
    <bin name="font_hour_25" size="25" bpp="4" as_file="false" range="0x20-0x7F" symbols="" src_path="fonts/Inter_28_Bold.ttf"/>
</fonts>

You can also use fonts directly from a .ttf file by using a <tiny_ttf> element instead of a <bin> element.

Caution

This requires a RAM footprint the size of the .ttf file, but if the RAM is available, it provides an extremely versatile way to make a font available to UI components!