rex2png - a utility for converting PNG files into REXPaint files
This is a simple utility I needed for Black Future to convert PNG files into REXPaint format. It handles transparency, and translucency with appropriate CP-467 tiles. It's pretty simple, but it does what I need. I hope you find it useful!
This uses a standard CMake setup, and requires zlib and libpng. Typically:
mkdir build; cd build; cmake -g"Unix Makefiles" ../src; make
will get you going.
png2rex <inputfile> <outputfile
png2rex ../testimage/kitty.png kitty.xp
You can then load the resulting image into your game, or with REXPaint.