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authorDaniel Stenberg <daniel@haxx.se>2002-09-12 13:35:10 +0000
committerDaniel Stenberg <daniel@haxx.se>2002-09-12 13:35:10 +0000
commit47a16e04903b710ff78115d139d84094b768756c (patch)
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parent93b231c69366563ba441dc4907bfb036fe3b4c55 (diff)
downloadrockbox-47a16e04903b710ff78115d139d84094b768756c.tar.gz
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1Description of the binary AJF font file format (version 2)
2
3Index Descripton
4
500 MAGIC1 (0xBD)
601 MAGIC2 (0xFC) used to make sure this is an ajf font
702 Unused, planned use: "code page"
803 - 22 ASCII text holding the font name
923 - 24 "bound width" (high 8 bits, low 8 bits)
1025 - 26 "bound height" (high 8 bits, low 8 bits)
1126 - 28 first character in the font
1229 - 2a number of characters in the font (alwasys 0x00ff now)
132b - map offset table starts here. Each offset entry is two bytes:
14 offset highbyte, offset lowbyte
15
16 The offset is number of bytes from the start of this file, to where
17 in the font data this particular char's font data starts.
18
19 There is one offset entry for each character in this font, starting
20 with 'first character' (set above) and ending when all the 'number
21 of characters' have been stored.
22
23?? - Font data. First four bytes width, height, dispx and dispy and then
24 the glyph in Rockbox-internal image-format. That means column-wise
25 left-to-right for the full width, the first 8 pixels of height. Then
26 follows the next 8 pixels of height left-to-right.
27
28 We don't currently support fonts larger than 16 pixels. (This font
29 file format would have no problem with bigger sizes, but the internal
30 bitmap function has.)
31
32References
33
34 The BDF file format
35 http://partners.adobe.com/asn/developer/pdfs/tn/5005.BDF_Spec.pdf \ No newline at end of file