Exporting for GBA

[Ofnuts]

Gimp can export in C array format (see the XBM format). Otherwise if you do the conversion outside of Gimp any lossless format will do. If you want something easy to read, see the "raw" format(*), or the TGA format. You can also write a file-* plugin (C or Python) and export the file directly in the format you need.

(*) not to be confused with the "raw" sensor data from cameras...