image-js/lib/image/utility/getRow.js

Image processing and manipulation in JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = getRow;
var _checks = require("../internal/checks");
/**
 * @memberof Image
 * @instance
 * @param {number} row
 * @param {number} [channel=0]
 * @return {number[]}
 */
function getRow(row, channel = 0) {
  this.checkProcessable('getRow', {
    bitDepth: [8, 16]
  });
  (0, _checks.checkRow)(this, row);
  (0, _checks.checkChannel)(this, channel);
  let array = new Array(this.width);
  let ptr = 0;
  let begin = row * this.width * this.channels + channel;
  let end = begin + this.width * this.channels;
  for (let j = begin; j < end; j += this.channels) {
    array[ptr++] = this.data[j];
  }
  return array;
}