import Viewer from '../viewer/Viewer';
/**
 * Builds RGBA canvas imagedata from a grayscale image.
 * @param viewer The viewer instance on which the image will be drawn.
 * @param buffer Grayscale data (0-225) to draw on the canvas.
 * @returns The ImageData instance.
 */
export default function drawToImageData(viewer: Viewer, outSize: [number, number], buffer: Uint8Array | Uint8ClampedArray): ImageData;