NativeImageFormat.class is the base for image files as reads files as defined
readInt() = width
readInt() = height
readBoolean() = has Alpha
readBoolean() = has Transparency
readInt() = Transparency should be indicated above and -1 is read as indiction of no transparency
readInt()...width> times height read a packed in containg RGB in the format AARRGGBB
14bytes+(width*height*4)bytes
This is a very simple form as is makes things simpler when reading a image and transcoding it.