text: "use strict";
  
  require("core-js/modules/es6.object.define-property");
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.default = void 0;
  
  var _utils = require("@jimp/utils");
  
  /**
   * Masks a source image on to this image using average pixel colour. A completely black pixel on the mask will turn a pixel in the image completely transparent.
   * @param {Jimp} src the source Jimp instance
   * @param {number} x the horizontal position to blit the image
   * @param {number} y the vertical position to blit the image
   * @param {function(Error, Jimp)} cb (optional) a callback for when complete
   * @returns {Jimp} this for chaining of methods
   */
  var _default = function _default() {
    return {
      mask: function mask(src) {
        var x = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
        var y = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
        var cb = arguments.length > 3 ? arguments[3] : undefined;
  
        if (!(src instanceof this.constructor)) {
          return _utils.throwError.call(this, 'The source must be a Jimp image', cb);
        }
  
        if (typeof x !== 'number' || typeof y !== 'number') {
          return _utils.throwError.call(this, 'x and y must be numbers', cb);
        } // round input
  
  
        x = Math.round(x);
        y = Math.round(y);
        var w = this.bitmap.width;
        var h = this.bitmap.height;
        var baseImage = this;
        src.scanQuiet(0, 0, src.bitmap.width, src.bitmap.height, function (sx, sy, idx) {
          var destX = x + sx;
          var destY = y + sy;
  
          if (destX >= 0 && destY >= 0 && destX < w && destY < h) {
            var dstIdx = baseImage.getPixelIndex(destX, destY);
            var data = this.bitmap.data;
            var avg = (data[idx + 0] + data[idx + 1] + data[idx + 2]) / 3;
            baseImage.bitmap.data[dstIdx + 3] *= avg / 255;
          }
        });
  
        if ((0, _utils.isNodePattern)(cb)) {
          cb.call(this, null, this);
        }
  
        return this;
      }
    };
  };
  
  exports.default = _default;
  module.exports = exports.default;
  //# sourceMappingURL=index.js.map