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import { isNodePattern, throwError } from "@jimp/utils";
export default (() => ({
/**
* Uniformly scales the image by a factor.
* @param {number} f the factor to scale the image by
* @param {string} mode (optional) a scaling method (e.g. Jimp.RESIZE_BEZIER)
* @param {function(Error, Jimp)} cb (optional) a callback for when complete
* @returns {Jimp} this for chaining of methods
*/
scale(f, mode, cb) {
if (typeof f !== "number") {
return throwError.call(this, "f must be a number", cb);
}
if (f < 0) {
return throwError.call(this, "f must be a positive number", cb);
}
if (typeof mode === "function" && typeof cb === "undefined") {
cb = mode;
mode = null;
}
const w = this.bitmap.width * f;
const h = this.bitmap.height * f;
this.resize(w, h, mode);
if (isNodePattern(cb)) {
cb.call(this, null, this);
}
return this;
},
/**
* Scale the image to the largest size that fits inside the rectangle that has the given width and height.
* @param {number} w the width to resize the image to
* @param {number} h the height to resize the image to
* @param {string} mode (optional) a scaling method (e.g. Jimp.RESIZE_BEZIER)
* @param {function(Error, Jimp)} cb (optional) a callback for when complete
* @returns {Jimp} this for chaining of methods
*/
scaleToFit(w, h, mode, cb) {
if (typeof w !== "number" || typeof h !== "number") {
return throwError.call(this, "w and h must be numbers", cb);
}
if (typeof mode === "function" && typeof cb === "undefined") {
cb = mode;
mode = null;
}
const f = w / h > this.bitmap.width / this.bitmap.height ? h / this.bitmap.height : w / this.bitmap.width;
this.scale(f, mode);
if (isNodePattern(cb)) {
cb.call(this, null, this);
}
return this;
}
}));
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