A simple C program that takes an image in output (as supported by the stb_image library) and saves a raw version of its pixel buffer.
execute build script:
$ ./build.sh
running
$ img2raw imagefile.ext
will produce a new file named imagefile.ext.w_h_c.raw where w is the width in pixels, h the height, c the channel count. The pixel buffer starts at the top left of the screen. Pixels are layed out one after the other in a simple RGB, or RGBA order (depending on the channel count); color channels are encoded in on byte each.