are there particular restrictions on the image properties? width/height, bit depth...?
bye thank you as
The logo file is a pcx file, indexed color (256 colors) 640 x400, depth 8bits. I created it with gimp, but I need to try and remember how. The one thing I remember is that only the first 16 entries in the palette are used.
I looked into this a little further and I guess I should have made some notes. But it appears that the file was created with Adobe Photoshop rather than gimp, but I don't recall exactly why. At any rate, the decoding is setup to use a palette of 256, but with only 16 colors used since there are only 4 bit planes for this graphics mode. However, there appears to be a difference of opinion about which end of the palette to use, Photoshop uses the upper end, and gimp appears to use the lower end (when converted to 16 colors). I wrote the code to use the upper end of the palette (Photoshop). I think the code should work with either, so either gimp or Photoshop could be used. I'll try to put the changes in the code in the next few days.
In gimp, the menu is image->mode->indexed and then set the palette to 16 colors. Then save the file as .pcx. This won't display until I fix the code, though. For now, you can load the result into Photoshop, convert to RGB, then convert back to index color (select custom palette), and save it, and this should display.
The .pcx file standard is at http://www.whisqu.se/per/docs/graphics57.htm.
-Steve