D 2018-08-18T02:38:34.637
L Picture\sfile\sformat
P cebb3a30638a72ea8274ae675881651f58a70fe9
U zzo38
W 1661
This document describes the format of the <tt>.xclass</tt> files. This file is a Hamster archive; all numbers are small-endian (except lump sizes). The possible lumps are mentioned below.
Despite the page title, this file contains both pictures and sounds.
<h2>*.IMG</h2>
Replace the asterisk with the name of the picture (which is case-insensitive; this name is used in the [Class definition file|<tt>.class</tt> file] to identify the picture).
This lump has a header, as follows:
* The low nybble of the first byte of the header specifies how many picture variants there are (from 1 to 15).
* After that is a number of bytes equal to the number of picture variants; each one is a number from 1 to 255 indicating the picture size (the width and height are both equal to this number, so the pictures are always square).
* After that is a number of bytes equal to half of the number of picture variants, rounding down. The first picture uses the high nybble of the first byte of the header; other than that, in this section, they use one nybble, where the low nybbles come first. These specify the encoding format.
Encoding formats:
* 0 = Compressed; order by y asc, x asc
* 1 = Compressed; order by y asc, x desc
* 2 = Compressed; order by y desc, x asc
* 3 = Compressed; order by y desc, x desc
* 4 = Compressed; order by x asc, y asc
* 5 = Compressed; order by x desc, y asc
* 6 = Compressed; order by x asc, y desc
* 7 = Compressed; order by x desc, y desc
* 15 = Uncompressed
(TODO)
<h2>*.WAV</h2>
Replace the asterisk with the name of the sound. The data of this lump is a RIFF WAVE file.
Z 6b40dfa1608f482183c5c33d13674aa1