voluptasquisquam/src/image/utility/setMatrix.js

Image processing and manipulation in JavaScript

/**
 * We set the data of the image from a matrix. The size of the matrix and the data have to be the same.
 * @memberof Image
 * @instance
 * @param {Matrix} matrix
 * @param {object} [options]
 * @param {number} [options.channel]
 */
export default function setMatrix(matrix, options = {}) {
    let {channel} = options;
    this.checkProcessable('getMatrix', {
        bitDepth: [8, 16]
    });

    if (channel === undefined) {
        if (this.components > 1) {
            throw new RangeError('You need to define the channel for an image that contains more than one channel');
        }
        channel = 0;
    }

    if (!matrix.length || !matrix[0].length || this.width !== matrix.columns || this.height !== matrix.rows) {
        throw new RangeError('The size of the matrix must be equal to the size of the image');
    }

    for (let x = 0; x < this.height; x++) {
        for (let y = 0; y < this.width; y++) {
            this.setValueXY(y, x, channel, matrix.get(x, y));
        }
    }
}