Function imagefmt::write_region

pub fn write_region<P>(filepath: P, w: usize, h: usize, src_fmt: ColFmt, data: &[u8], tgt_type: ColType, rx: usize, ry: usize, rw: usize, rh: usize) -> Result<()> where P: AsRef<Path>

Writes a region of an image and converts it to requested color type.

The region is defined by the top-left coordinates rx and ry and the width and height rw and rh.