Image file

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(Up to File formats)

Team17's image files (typically with an .img file extension) are usually compressed palleted images.

File format

Game Type Size Name Description
[W2][WA][WWP][OW][WWPA] uint8[4] 4 Signature Always "IMG\x1A".
[W2][WA][WWP][OW][WWPA] uint32 4 File Size Complete length of the file, in bytes.
[W2][—][—][OW][—] string0 - Description An optional, null-terminated string, only present in some Worms 2 and Online Worms images.
[W2][WA][WWP][OW][WWPA] uint8 1 Bits Per Pixel Usually 8 (256 colors).
[W2][WA][WWP][OW][WWPA] uint8 1 Image Flags A bit field of the following values:
  • 1 << 6 (0x40) = Image data is compressed; otherwise, it is an array of Width × Height pixels.
  • 1 << 7 (0x80) = Image has a palette, defined as follows:
[W2][WA][WWP][OW][WWPA] uint16 2 Palette Color Count Only if palletized, excludes black[1].
[W2][WA][WWP][OW][WWPA] rgb[colorCount] 3 × color count Palette Colors Only if palletized, excludes black[1]. 3 bytes each color (RGB).
[W2][WA][WWP][OW][WWPA] uint16 2 Image Width In pixels.
[W2][WA][WWP][OW][WWPA] uint16 2 Image Height In pixels.
[—][—][WWP][—][WWPA] align4 - Alignment Only when embedded in land.dat files, aligns to the next 4-byte boundary.
[W2][WA][WWP][OW][WWPA] uint8[] - Image Data Raw image data, according to the above.
  1. 1.0 1.1 The black colour isn't listed in the image palette, nor counted in the "number of colours" word. It is counted as the colour 0, so the palette stored in the file should be loaded starting from colour 1.
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