FON1
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A FON1 font, or console font, contains a set of 256 grayscaled, monospaced characters. It begins with a header of this form:
| Offset | Length | Name | Content |
|---|---|---|---|
| 0x0000 | 4*1 | Identifier | The characters 'F', 'O', 'N', and '1'. |
| 0x0004 | 2 | Width | Unsigned value for character width. |
| 0x0006 | 2 | Height | Unsigned value for character height. |
| 0x0008 | * | Data | RLE-compressed data for all characters in sequence. |
The data create a Width × (Height × 256) grayscale image in which the glyphs are in sequence from top to bottom. The darkest color, 0x00, is transparent.
ZDoom provides a FON1 font in a file named confont.lmp in zdoom.pk3. This is used for the console font.