How to create a new BinFont?

[wprinz]

I have migrated my Arduitouch device (ESP32 with an ILI9341 display) from my own program that I developed some time ago to Tasmota using Tasmota-display that I compiled with the #define USE_RAMFONT option to add additional fonts. I succeeded to use fonts that I downloaded from the BinFonts folder and then uploaded to the ESP32.

Now I'd like to add other fonts. How can I e.g. convert gfx fonts that I got from here: http://oleddisplay.squix.ch to the binary format that is used by Tasmota? I tried to use fontconvert.py without success. Any hint on how to create or convert new fonts that can be used as Tasmota BinFonts is appreciated.

[valdus2]

In that way...

#21796 (comment)

[wprinz]

Many thanks for the immediate reply! I tested already Script Editor (For converting .h to .fnt files), but that failed with gfx.h files that I got using http://oleddisplay.squix.ch/ either with a "parameter error pop up" or by producing a "murks.fnt" file (murks is the german word for rubbish, good humor of the author :-)

Now I gave it a another try with gfx fonts that I converted using this site: https://rop.nl/truetype2gfx/.
The provided GFX fonts, as well as the GFX fonts that are converted from uploaded ttf files can be successfully converted with Script Editor to a .fnt file and they work well as a Tasmota BinFont / RAM font.

So the recommened pipeline is:

• use https://rop.nl/truetype2gfx/ to create the gfx.h file
• convert this with Script Editor to a .fnt file (link above)
• upload to Tasmota-display that has been compiled with the #define USE_RAMFONT option
• activate your new font: displayText [zFfontFileName:f5c1l5]abcde (use l5 = line 5 since RAM Fonts are often larger and thus the line position is not well calculated meaning that the appear to high on the display,

[valdus2]

Maybe this is the recommended pipeline for you, but converting a font in your way (from the above links), uses all its characters,
and if you want to use a second or a third etc. font, there is no more ram or space to use (you can't unload a font).
By limiting your selection to conclude only the characters that you want,
you can use much more typefaces at once, or use the ram and space for whatever you want.