image-size

Version:

get dimensions of any image file

9 lines (8 loc) • 282 B

JavaScript

import { readInt32LE, readUInt32LE, toUTF8String } from './utils.js';
export const BMP = {
    validate: (input) => toUTF8String(input, 0, 2) === 'BM',
    calculate: (input) => ({
        height: Math.abs(readInt32LE(input, 22)),
        width: readUInt32LE(input, 18),
    }),
};