led-matrix-ts/dist/esm/lib/core/character-sizer.js

Highly customizable led matrix for the browser

export class NearestNeighbor {
    static scale(matrix, width, factor) {
        const ratio = 1 / factor;
        const h1 = matrix.length / width;
        const w2 = width * factor;
        const h2 = h1 * factor;
        let finalMatrix = new Array(w2 * h2);
        for (let i = 0; i < h2; i++) {
            for (let j = 0; j < w2; j++) {
                const px = Math.floor(j * ratio);
                const py = Math.floor(i * ratio);
                finalMatrix[(i * w2) + j] = matrix[(py * width) + px];
            }
        }
        return finalMatrix;
    }
}
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