Bwolna, posted Sun Jun 26, 2022 1:02 pm (72311)

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Something like this:

Code:

      Path sourceFile = Paths.get("/home/owner/test/RR2/PALT0504.PAL");
      byte[] rawFile = Files.readAllBytes(sourceFile);
      int count = readLong(rawFile, 0);
      for (int i=0; i         byte[] pal = new byte[768];
         for (int j=0; j<256; j  ) {
            int color = readWord(rawFile, 4  0x23   i*512   j*2);
            int c1 = color & 0x1F;
            int c2 = (color >>> 5) & 0x1F;
            int c3 = (color >>> 0xA) & 0x1F;
            pal[j*3   0] = (byte) (c1 << 2);
            pal[j*3   1] = (byte) (c2 << 2);
            pal[j*3   2] = (byte) (c3 << 2);
         }
         Path newFile = Paths.get(sourceFile.toString()   "."   i   ".pal");
         Files.write(newFile, pal,
               StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE);
      }
   }
}

If you know what picture could be used to find which of colors is red-green-blue, write here.

eldomtom2, posted Sun Jun 26, 2022 3:38 pm (72317)

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Here's BL1SHEEP.IMB in-game. Is this the sort of thing you're looking for?

Bwolna, posted Sun Jun 26, 2022 4:24 pm (72318)

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Code:

Extract sprites from BL1SHEEP.IMB
Number of sprites: 1
sprite #00
  sprite type 3
  Use palette PALT0239.PAL
  ...

Code:

Convert palettes from PALT0239.PAL
Number of palettes: 4
palette #00
  saved "/home/owner/test/RR2/2/PALT0239.PAL.palettes/00.pal"
palette #01
  saved "/home/owner/test/RR2/2/PALT0239.PAL.palettes/01.pal"
palette #02
  saved "/home/owner/test/RR2/2/PALT0239.PAL.palettes/02.pal"
palette #03
  saved "/home/owner/test/RR2/2/PALT0239.PAL.palettes/03.pal"

I don't how the game chooses one from these four palettes, but when I selected "00.pal" in GBS the image looks similar to your example. For other files you should try all extracted palettes to choose best match.

rr2pal.zip

eldomtom2, posted Sun Jun 26, 2022 8:35 pm (72323)

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That seems to work well, thanks a lot. I think the different palettes are for when you build buildings in the game. I'll let you know if I encounter any other problems.

Edit: My only comment is that it would be nice if you could support whatever 0x20 is.

eldomtom2, posted Mon Jun 27, 2022 8:13 pm (72331)

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I'm not sure if this helps, but I'm fairly certain the sprites that produce the "unpacking !0x20 not implemented" error are the ones with transparency.

Bwolna, posted Sun Jul 17, 2022 5:23 pm (72629)

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eldomtom2 wrote:

but I'm fairly certain the sprites that produce the "unpacking !0x20 not implemented" error are the ones with transparency.

Added !0x20 and 0x20 branches to sprite extractor tool.

Sprites with 0x20 are not used when game works in 16-bit mode, and I did not found anything meaningful encoded with this type of compression.

Contrary, !0x20 are used a lot for compressing animated parts of buildings and transparent parts of user interface.

OLD:

Code:

Sprite unpacker for Railroad Tycoon II

Extract sprites from YEAREND.IMB
Number of sprites: 8
sprite #00
  sprite type 3
  Use palette PALT0020.PAL
    block #00_00
      image #00_00_00
        image dimensions: 509x597
        ERROR: java.lang.Exception:         unpacking !0x20 not implemented!
...

NEW:

Code:

Sprite unpacker for Railroad Tycoon II, ver. 20220717

Extract sprites from YEAREND.IMB
Number of sprites: 8
sprite #00
  sprite type 3
  Use palette PALT0020.PAL
    block #00_00
      image #00_00_00
        image dimensions: 509x597
        image position: 12,0
        packed size: 242580, unpacked size: 303873
        saved "/home/owner/test/RR2/9/YEAREND.IMB.sprites/00_00_00.unpacked"
...

rr2spr2.zip

eldomtom2, posted Thu Jul 21, 2022 3:34 pm (72700)

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It works perfectly now, thanks a lot for all your hard work!