PixelPet is an image processing tool for ROM hacking. It allows you to automatize converting common image files (such as PNG) to the binary formats supported by retro consoles. You can also go the other way, using PixelPet to extract and render binary images from game ROMs.
Currently PixelPet is geared towards Game Boy Advance and Nintendo DS, with full support for 4BPP and 8BPP tilesets/tilemaps and bitmaps. However, it should be easy to add other graphics formats as needed. There is some very early support for Game Boy as well.
PixelPet is intended to be a "Swiss Army knife" of automated graphics processing for ROM hacks. The key principle is that PixelPet usage is imperative, rather than declarative. You can define every step of the pipeline, which ends up giving you far more control over the output. PixelPet is fully command line-based and should be easy to integrate into automated build scripts.
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