image-js/lib/image/utility/setMatrix.js

Image processing and manipulation in JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = setMatrix;
var _mlMatrix = require("ml-matrix");
/**
 * 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]
 *
 * @return {this}
 */
function setMatrix(matrix, options = {}) {
  matrix = new _mlMatrix.Matrix(matrix);
  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 (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));
    }
  }
  return this;
}