i make this tool for my ds framebuffer rendering...

since ptexconv (https://github.com/Garhoogin/ptexconv) automatically convert the image dimension into power of two...
i decided to make my own...
not sure if grit did the same, i hate grit lol...

Usage: sillyimage <input image> <output image>

first and second 4 byte is image width and height.
the rest is raw argb15, no fancy compression or anything, just a simple raw data...