#+title: Font thing
#+author: Antoine "Annwan" COMBET
#+options: toc:nil

A small bitmap font renderer with its own format.

* The format

Introducing /TXTF/ a family of text based bitmap font formats.

The first line of a TXTF font is the following:
#+begin_quote
=TXTF= /mode/ /nbcommentlines/ /params/
#+end_quote
Like
#+begin_example
TXTF 1 10 5 5 .#
#+end_example

The /nbcommentlines/ parameter is the number of description or comment
lines placed before the actual font data (not including the
header). In this comment area, you may put stuff like modelines,
copyright information and/or a description of the font.

The /mode/ is the specific fomat in the txtf familly this file is in,
the existing mode are as follow

** Mode 1 (Monospace)

#+begin_quote
=TXTF= =1= nbcommentlines width height alphabet

Comment lines

Data
#+end_quote

- /width/: is the number of pixels each character is wide
- /height/: is the number of pixels each character is high
- /alphabet/: 2 characters, the first represents OFF pixels, the second
  represents ON pixels.

Data is then in the following form
#+begin_quote
character "/width/ * /height/ of the alphabet for the character"
#+end_quote
whitespace is ignored in character data.

Here is a sample mode 1 font
#+begin_src nil
TXTF 1 2 6 6 .#
Some font for the readme
By Annwan
!..#.....#.....#...........#.........
#.#.#..#####..#.#..#####..#.#........
_........................#####.......
#+end_src

# Local variables:
# eval: (auto-fill-mode +1)
# End: