8x8 monochrome bitmap font for rendering
=========================================
A collection of header files containing a 8x8 bitmap font.
font8x8.h contains all available characters
font8x8_basic.h contains unicode points U+0000 - U+007F
font8x8_latin.h contains unicode points U+0000 - U+00FF
Author: Daniel Hepper <daniel@hepper.net>
License: Public Domain
Encoding
========
Every character in the font is encoded row-wise in 8 bytes.
The least significant bit of each byte corresponds to the first pixel in a
row.
The character 'A' (0x41 / 65) is encoded as
{ 0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00}
0x0C => 0000 1100 => ..XX....
0X1E => 0001 1110 => .XXXX...
0x33 => 0011 0011 => XX..XX..
0x33 => 0011 0011 => XX..XX..
0x3F => 0011 1111 => xxxxxx..
0x33 => 0011 0011 => XX..XX..
0x33 => 0011 0011 => XX..XX..
0x00 => 0000 0000 => ........
To access the nth pixel in a row, right-shift by n.
. . X X . . . .
| | | | | | | |
(0x0C >> 0) & 1 == 0-+ | | | | | | |
(0x0C >> 1) & 1 == 0---+ | | | | | |
(0x0C >> 2) & 1 == 1-----+ | | | | |
(0x0C >> 3) & 1 == 1-------+ | | | |
(0x0C >> 4) & 1 == 0---------+ | | |
(0x0C >> 5) & 1 == 0-----------+ | |
(0x0C >> 6) & 1 == 0-------------+ |
(0x0C >> 7) & 1 == 0---------------+
Renderer
========
To visualize the font, a simple renderer is included in render.c
$ gcc render.c -o render
$ ./render 65
XX
XXXX
XX XX
XX XX
XXXXXX
XX XX
XX XX
Credits
=======
These header files are directly derived from an assembler file fetched from:
http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
Original header:
; Summary: font8_8.asm
; 8x8 monochrome bitmap fonts for rendering
;
; Author:
; Marcel Sondaar
; International Business Machines (public domain VGA fonts)
;
; License:
; Public Domain
;
fcd58ad7e6