Method copy_from

src/opencv/mod.rs:250–262

Copies an area from the given image at location `(x,y )` with width `width` and height `height` into this image at position `(dstx, dsty)`.

(&mut self, 
            img: &T, x: usize, y: usize, width: usize, height: usize, // source
            dstx: usize, dsty: usize)

    /// Copies an area from the given image at location `(x,y )` with width `width`
    /// and height `height` into this image at position `(dstx, dsty)`.
    fn copy_from<T: Image>(&mut self, 
            img: &T, x: usize, y: usize, width: usize, height: usize, // source
            dstx: usize, dsty: usize) { // dst

        // TODO bounce checking, error handling, performance
        for iy in (0..height) {
            for ix in (0..width) {
                self.set_pixel_from_rgb(
                    dstx + ix, dsty + iy, &img.pixel_as_rgb(x + ix, y + iy).unwrap()
                );
            }
        }
    }

    /// Draws text on the image at position `(x, y)`.
    fn draw_text(&mut self, txt: &str, x: usize, y: usize, font: &Font) {