GT2/Ejectable/node_modules/@jimp/plugin-displace/es/index.js

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2021-08-16 00:14:59 +00:00
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
var _utils = require("@jimp/utils");
/**
* Displaces the image based on the provided displacement map
* @param {object} map the source Jimp instance
* @param {number} offset the maximum displacement value
* @param {function(Error, Jimp)} cb (optional) a callback for when complete
* @returns {Jimp} this for chaining of methods
*/
var _default = function _default() {
return {
displace: function displace(map, offset, cb) {
if ((0, _typeof2["default"])(map) !== 'object' || map.constructor !== this.constructor) {
return _utils.throwError.call(this, 'The source must be a Jimp image', cb);
}
if (typeof offset !== 'number') {
return _utils.throwError.call(this, 'factor must be a number', cb);
}
var source = this.cloneQuiet();
this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function (x, y, idx) {
var displacement = map.bitmap.data[idx] / 256 * offset;
displacement = Math.round(displacement);
var ids = this.getPixelIndex(x + displacement, y);
this.bitmap.data[ids] = source.bitmap.data[idx];
this.bitmap.data[ids + 1] = source.bitmap.data[idx + 1];
this.bitmap.data[ids + 2] = source.bitmap.data[idx + 2];
});
if ((0, _utils.isNodePattern)(cb)) {
cb.call(this, null, this);
}
return this;
}
};
};
exports["default"] = _default;
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