46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
import { z } from "zod";
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const CircleOptionsSchema = z.object({
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/** the x position to draw the circle */
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x: z.number().optional(),
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/** the y position to draw the circle */
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y: z.number().optional(),
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/** the radius of the circle */
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radius: z.number().min(0).optional(),
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});
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export const methods = {
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/**
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* Creates a circle out of an 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.circle();
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* // or
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* image.circle({ radius: 50, x: 25, y: 25 });
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* ```
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*/
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circle(image, options = {}) {
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const parsed = CircleOptionsSchema.parse(options);
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const radius = parsed.radius ||
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(image.bitmap.width > image.bitmap.height
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? image.bitmap.height
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: image.bitmap.width) / 2;
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const center = {
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x: typeof parsed.x === "number" ? parsed.x : image.bitmap.width / 2,
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y: typeof parsed.y === "number" ? parsed.y : image.bitmap.height / 2,
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};
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image.scan((x, y, idx) => {
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const curR = Math.sqrt(Math.pow(x - center.x, 2) + Math.pow(y - center.y, 2));
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if (radius - curR <= 0.0) {
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image.bitmap.data[idx + 3] = 0;
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}
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else if (radius - curR < 1.0) {
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image.bitmap.data[idx + 3] = 255 * (radius - curR);
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}
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});
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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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