BMF – ByteMap font format
| offset |
size |
meaning |
| 0 |
4 |
magic header (its hexa dump is: E1 E6 D5 1A) |
| 4 |
1 |
version (currently 11h) |
| 5 |
1 |
line-height |
| 6 |
1 |
size-over the base line (-128…127) |
| 7 |
1 |
size-under the base line (-128…127) |
| 8 |
1 |
add-space after each char (-128…127) |
| 9 |
1 |
size-inner (non-caps level) (-128…127) |
| 10 |
1 |
count of used colors (should be <= 32) |
| 11 |
1 |
highest used color attribute |
| 12 |
4 |
reserved |
| 16 |
1 |
number of RGB entries (P) |
| 17 |
P*3 |
font palette (RGB bytes, max=63) |
| 17+P*3 |
1 |
info length (L) |
| 18+P*3 |
L |
info string |
| 19+P*3+L |
2 |
number of characters in font |
| 20+P*3+L |
? |
list of bitmap character definitions [whichchar,entry, data] |
| offset |
size |
meaning |
| –1 |
1 |
which character |
| 0 |
1 |
character width (W) |
| 1 |
1 |
character height (H) |
| 2 |
1 |
relx horizontal offset according to cursor (-128..127) |
| 3 |
1 |
rely vertical offset according to cursor (-128..127) |
| 4 |
1 |
horizontal cursor shift after drawing the character |
| 5 |
W * H |
character data itself (uncompressed, 8 bits per pixel) |
Example
| |
F |
j |
: |
Q |
| relx |
0 |
–2 |
1 |
0 |
| rely |
0 |
2 |
2 |
0 |
| w |
4 |
4 |
1 |
10 |
| h |
8 |
9 |
4 |
9 |
| shift |
4 |
2 |
3 |
8 |
addspace=1. The red arrow is cursor position during outputing each
character of the text. For more explanation choose to test any of
fonts on this website.
