voluptasquisquam/src/image/filter/invertPixel.js

Image processing and manipulation in JavaScript

// this code gives the same result as invert()
// but is based on a matrix of pixels
// may be easier to implement some algorithm
// but it will likely be much slower

export default function invertPixel() {
    this.checkProcessable('invertPixel', {
        bitDepth: [8, 16]
    });


    for (let x = 0; x < this.width; x++) {
        for (let y = 0; y < this.height; y++) {
            let value = this.getPixelXY(x, y);
            for (let k = 0; k < this.components; k++) {
                value[k] = this.maxValue - value[k];
            }
            this.setPixelXY(x, y, value);
        }
    }

}