david_prentice:
Do you know what this <3.0.0 format is?
Do you know what the >=3.0.0 format is?<3.0.0 looks like Thiele format but with packed bitmaps (and a special feature)
I have not looked at the format, they are for Squix's (aka Daniel Eichhorn) TFT library (called miniGrafix I think) at different versions.
david_prentice:
Do you know of any other online Font Converter sites?
Here is one I found almost by accident a while ago, it looks promising but I have not tried it.
For command line generation of fonts with an extended range I followed following the tutorial here:
and downloaded the pre-compiled Windows compatible files from the .exe link in that that tutorial to generate extended range fonts.
As an example command line for the Japanese Hiragana characters in the code point range 12353 - 12435 is:
fontconvert C:\Windows\Fonts\sourceFont.ttf 12 12353 12435 > hiragana12.h
TFT_eSPI supports 5 font formats already but if I were to add another format it would probably be the one used by LittlevGL as the format and converter tools appear to be well thought out.