AAF File Format

AAF File Format
The AAF Font File Format is used to store fonts in both Fallout and Fallout 2. Only the AAF files used in the English versions are discussed here, there may or may not be variations for other languages.

The AAF file stores a separate glyph for each of the 256 position in the ASCII table. The fonts in an AAF file are typically non-fixed size, i.e. each glyph has it's own width and height. A glyph is defined by a rectangular bitmap representing the pixels of the glyph, corresponding to the way that it appears on the screen. Each pixel can have a possible value in the range of 0 to 9.


 * 0 means that the pixel is transparent.
 * The values 1 to 9 represent the relative brightness of that pixel, with 9 being the brightest. There does not appear to be a linear increase in brightness from values 1 to 9.

Here is an example of the bitmap of a glyph. This glyph is from the file FONT1.AAF and represents the character 'b' (ASCII 98).

77      77       777763   77  76   77  77   77  76   777763

Pixels with value 0 are not shown as they are transparent. The higher numbers 7 and 6 represent the brighter parts of the glyph, while the 3 would be much duller in colour. This would be expected for the rounder corners of the b.

Note: All integers are in Motorola format.

Created by Noid (noid@888.nu)

Patched by Anchorite (anchorite2001@yandex.ru)

Found in TeamX's offline docs