I am using a ESP32-LoRa board with an OLED. It is made by Heltec. It uses the library called "Heltec_ESP32_Dev-Boards".
Its documentation says: setFont sets the current font. Available default fonts: ArialMT_Plain_10, ArialMT_Plain_16, ArialMT_Plain_24. Or create one with the font tool at http://oleddisplay.squix.ch. Syntax: void setFont(const uint8_t fontData);*
If you go to the mentioned website, it will generate the code to put into a .h file defining a specific font. But I don't know how to make my own file. I want to make a font that they do not have.
Thank you, but I already have the library. I read all of the documentation that came with it. I even rewrote it in proper English so I could understand it. But the only mention of custom fonts is what I quoted in my earlier post. I read somewhere that the algorithm for creating the .h files is known. But I cannot find it.
Thank you John. Your link led me to the doc I was hoping for. It does not specifically describe the file format, but it gave me the tools needed to figure it out. Now I can use the font editor, or do it by myself.