Function fitWithin

packages/functions/src/utils.ts:313–333

(size: vec2, limit: vec2)

 * @hidden
 */
export function fitWithin(size: vec2, limit: vec2): vec2 {
	const [maxWidth, maxHeight] = limit;
	const [srcWidth, srcHeight] = size;

	if (srcWidth <= maxWidth && srcHeight <= maxHeight) return size;

	let dstWidth = srcWidth;
	let dstHeight = srcHeight;

	if (dstWidth > maxWidth) {
		dstHeight = Math.floor(dstHeight * (maxWidth / dstWidth));
		dstWidth = maxWidth;
	}

	if (dstHeight > maxHeight) {
		dstWidth = Math.floor(dstWidth * (maxHeight / dstHeight));
		dstHeight = maxHeight;
	}

	return [dstWidth, dstHeight];
}

type ResizePreset = 'nearest-pot' | 'ceil-pot' | 'floor-pot';