hi there,

I extended my font rendering lib so that you can color your characters any way you want them, in any size, highlight each character separately, add underlining, overlining, strikethrough, draw them at any location with correct line heights, gaps, and kerning (some of this is based on freetype-gl: https://github.com/rougier/freetype-gl).
All of this in one draw call, one vao, one texture, one shader, everything instanced, SUPER FAST :D
Licence is MIT, download here, feel free to use: https://github.com/Yours3lf/instanced_font_rendering

It should be super easy to integrate.

Requires GL3.x

best regards,

Yours3!f