PlatformIO package of the Teensy core framework compatible with GCC 10 & C++20
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  1. otf2bdf - converts truetype to BDF font format
  2. https://www.math.nmsu.edu/~mleisher/Software/otf2bdf/
  3. sudo apt-get install otf2bdf
  4. Per-font encoding:
  5. #bits for horiz advance
  6. #bits for width
  7. #bits for height
  8. #bits for x offset
  9. #bits for y offset
  10. #bits in offsets table
  11. table of offset for all chars
  12. Per-char encoding:
  13. WIDTH
  14. BBX: width, height
  15. BBX: x offset, y offset
  16. pixel data, bit packed:
  17. if 1st bit = 0, rest is bits for 1 line
  18. if 1st bit = 1, next 3 bits are #repeat (0 to 5), followed by 1 line