Function rqrr::find_and_decode_from_func

pub fn find_and_decode_from_func<F>(
    width: usize, 
    height: usize, 
    fill: F
) -> Vec<Code> where
    F: FnMut(usize, usize) -> u8, 

Find QR-Codes and decode them

This method expects to be given an image of dimension width * height. The data is supplied via the fill function. The fill function will be called width coordinates x, y, where x ranges from 0 to width and y from 0 to height. The return value is expected to correspond with the greyscale value of the image to decode, 0 being black, 255 being white.

Returns

Returns a collection of all QR-Codes that have been found. They are already decoded and contain some extra metadata like position in the image as well as information about the used QR code itself

Panics

Panics if width * height would overflow.

Examples

use image;
use rqrr;

let img = image::open("tests/data/github.gif").unwrap().to_luma();
let w = img.width() as usize;
let h = img.height() as usize;
let codes = rqrr::find_and_decode_from_func(w, h, |x, y|  img.get_pixel(x as u32, y as u32).data[0]);
assert_eq!(codes.len(), 1);
assert_eq!(codes[0].val, "https://github.com/WanzenBug/rqrr");