79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
import { throwError, isNodePattern } from '@jimp/utils';
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import Resize from './modules/resize';
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import Resize2 from './modules/resize2';
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export default (function () {
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return {
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constants: {
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RESIZE_NEAREST_NEIGHBOR: 'nearestNeighbor',
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RESIZE_BILINEAR: 'bilinearInterpolation',
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RESIZE_BICUBIC: 'bicubicInterpolation',
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RESIZE_HERMITE: 'hermiteInterpolation',
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RESIZE_BEZIER: 'bezierInterpolation'
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},
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class: {
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/**
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* Resizes the image to a set width and height using a 2-pass bilinear algorithm
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* @param {number} w the width to resize the image to (or Jimp.AUTO)
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* @param {number} h the height to resize the image to (or Jimp.AUTO)
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* @param {string} mode (optional) a scaling method (e.g. Jimp.RESIZE_BEZIER)
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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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resize: function resize(w, h, mode, cb) {
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if (typeof w !== 'number' || typeof h !== 'number') {
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return throwError.call(this, 'w and h must be numbers', cb);
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}
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if (typeof mode === 'function' && typeof cb === 'undefined') {
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cb = mode;
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mode = null;
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}
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if (w === this.constructor.AUTO && h === this.constructor.AUTO) {
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return throwError.call(this, 'w and h cannot both be set to auto', cb);
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}
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if (w === this.constructor.AUTO) {
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w = this.bitmap.width * (h / this.bitmap.height);
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}
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if (h === this.constructor.AUTO) {
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h = this.bitmap.height * (w / this.bitmap.width);
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}
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if (w < 0 || h < 0) {
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return throwError.call(this, 'w and h must be positive numbers', cb);
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} // round inputs
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w = Math.round(w);
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h = Math.round(h);
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if (typeof Resize2[mode] === 'function') {
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var dst = {
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data: Buffer.alloc(w * h * 4),
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width: w,
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height: h
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};
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Resize2[mode](this.bitmap, dst);
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this.bitmap = dst;
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} else {
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var image = this;
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var resize = new Resize(this.bitmap.width, this.bitmap.height, w, h, true, true, function (buffer) {
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image.bitmap.data = Buffer.from(buffer);
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image.bitmap.width = w;
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image.bitmap.height = h;
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});
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resize.resize(this.bitmap.data);
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}
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if (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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});
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//# sourceMappingURL=index.js.map
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