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