import { JimpClass } from "@jimp/types";
import { z } from "zod";
const CircleOptionsSchema = z.object({
/** the x position to draw the circle */
x: z.number().optional(),
/** the y position to draw the circle */
y: z.number().optional(),
/** the radius of the circle */
radius: z.number().min(0).optional(),
});
export type CircleOptions = z.infer<typeof CircleOptionsSchema>;
export const methods = {
/**
* Creates a circle out of an image.
* @example
* ```ts
* import { Jimp } from "jimp";
*
* const image = await Jimp.read("test/image.png");
*
* image.circle();
* // or
* image.circle({ radius: 50, x: 25, y: 25 });
* ```
*/
circle<I extends JimpClass>(image: I, options: CircleOptions = {}) {
const parsed = CircleOptionsSchema.parse(options);
const radius =
parsed.radius ||
(image.bitmap.width > image.bitmap.height
? image.bitmap.height
: image.bitmap.width) / 2;
const center = {
x: typeof parsed.x === "number" ? parsed.x : image.bitmap.width / 2,
y: typeof parsed.y === "number" ? parsed.y : image.bitmap.height / 2,
};
image.scan((x, y, idx) => {
const curR = Math.sqrt(
Math.pow(x - center.x, 2) + Math.pow(y - center.y, 2),
);
if (radius - curR <= 0.0) {
image.bitmap.data[idx + 3] = 0;
} else if (radius - curR < 1.0) {
image.bitmap.data[idx + 3] = 255 * (radius - curR);
}
});
return image;
},
};
