Export Sega Megadrive/Genesis tiles from Gimp
This is a plug-in for Gimp for exporting images as 8x8 tiles for Sega Genesis/Megadrive as asm68k source files.
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Copy gimp_megadrive_export.py to your Gimp plugins folder. To find out its location, run Gimp and go to
Edit > Preferences > Folders > Plug-ins -
(Skip if you're using Windows) Change file permissions by adding executable bit:
chmod +x gimp_megadrive_export.py -
Restart Gimp
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Make sure your image is indexed, with no more than 15 colors (may have transparency), use Image > Mode > Indexed.. to convert;
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Go to File > Export As.., in "All export images" select "Asm68k files (*.asm)", click "Select File Type (By Extension)", then "Asm68k files";
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Click "Export";
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Click "Ok" in file-asm-save dialog box. You can choose whether to use COLRW macro (see below) or not, whether to merge duplicate palette colors, and choose export order of the tiles;
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Done. If one or both of your image's dimensions is not a multiple of 8, the plugin will show a dialog box informing of unexported pixels.
COLRW is an asm68k macro that I use to improve readability of exported palettes. With it you can see palette RGB values (0 - 7) in the code, instead of color components packed into hexadecimal words.
- Tile optimization: add an option to skip repeating tiles