import * as BMP from "bmp-ts";
import { scan } from "@jimp/utils";
import { Bitmap, Format } from "@jimp/types";
export type { BmpColor } from "bmp-ts";
export { BmpCompression } from "bmp-ts";
type Pretty<T> = {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
[K in keyof T]: T[K] extends (...args: any[]) => any
? T[K]
: T[K] extends object
? Pretty<T[K]>
: T[K];
};
export type EncodeOptions = Pretty<
Partial<
Pick<
BMP.BmpImage,
| "palette"
| "colors"
| "importantColors"
| "hr"
| "vr"
| "reserved1"
| "reserved2"
>
>
>;
export interface DecodeBmpOptions {
toRGBA?: boolean;
}
function encode(image: Bitmap, options: EncodeOptions = {}) {
scan(
{ bitmap: image },
0,
0,
image.width,
image.height,
function (_, __, index) {
const red = image.data[index + 0]!;
const green = image.data[index + 1]!;
const blue = image.data[index + 2]!;
const alpha = image.data[index + 3]!;
image.data[index + 0] = alpha;
image.data[index + 1] = blue;
image.data[index + 2] = green;
image.data[index + 3] = red;
}
);
return BMP.encode({ ...image, ...options }).data;
}
function decode(data: Buffer, options?: DecodeBmpOptions) {
const result = BMP.decode(data, options);
scan(
{ bitmap: result },
0,
0,
result.width,
result.height,
function (_, __, index) {
// const alpha = result.data[index + 0]!;
const blue = result.data[index + 1]!;
const green = result.data[index + 2]!;
const red = result.data[index + 3]!;
result.data[index + 0] = red;
result.data[index + 1] = green;
result.data[index + 2] = blue;
result.data[index + 3] = 0xff;
}
);
return result as Bitmap;
}
export function msBmp() {
return {
mime: "image/x-ms-bmp",
encode,
decode,
} satisfies Format<"image/x-ms-bmp">;
}
export default function bmp() {
return {
mime: "image/bmp",
encode,
decode,
} satisfies Format<"image/bmp">;
}
