43 lines
1.5 KiB
JavaScript
43 lines
1.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.methods = void 0;
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const utils_1 = require("@jimp/utils");
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const zod_1 = require("zod");
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const FisheyeOptionsSchema = zod_1.z.object({
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/** the radius of the circle */
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radius: zod_1.z.number().min(0).optional(),
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});
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exports.methods = {
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/**
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* Adds a fisheye effect to the image.
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* @example
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* ```ts
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* import { Jimp } from "jimp";
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*
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* const image = await Jimp.read("test/image.png");
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*
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* image.fisheye();
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* ```
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*/
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fisheye(image, options = {}) {
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const { radius = 2.5 } = FisheyeOptionsSchema.parse(options);
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const source = (0, utils_1.clone)(image);
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const { width, height } = source.bitmap;
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source.scan((x, y) => {
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const hx = x / width;
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const hy = y / height;
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const rActual = Math.sqrt(Math.pow(hx - 0.5, 2) + Math.pow(hy - 0.5, 2));
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const rn = 2 * Math.pow(rActual, radius);
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const cosA = (hx - 0.5) / rActual;
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const sinA = (hy - 0.5) / rActual;
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const newX = Math.round((rn * cosA + 0.5) * width);
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const newY = Math.round((rn * sinA + 0.5) * height);
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const color = source.getPixelColor(newX, newY);
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image.setPixelColor(color, x, y);
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});
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/* Set center pixel color, otherwise it will be transparent */
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image.setPixelColor(source.getPixelColor(width / 2, height / 2), width / 2, height / 2);
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return image;
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},
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};
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//# sourceMappingURL=index.js.map
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