401Dune

CPS File Format

By Ben Owen, 16/08/2009
Revision 1
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The .CPS files each contain a single 256-colour image with dimensions 320 x 200 pixels. The file may contain a palette, as in VIRGIN.CPS, although in most cases IBM.PAL is used to draw the image.

The .CPS file header is represented by:

header {
   Int16 Size;     // File size - 2
   Int16 Unknown;  // Always 0x0004, perhaps some sort of formatting mark?
   Int16 ImageSize // Size of decompressed image. Always 0x0FA00, since
                      always 320 x 200 px.
   Int32 PaletteSize; // If there is a palette, it will be 0x30000000
}

The image data follows immediately after, and is compressed using the Format80 algorithm.