import { Buffer } from 'node:buffer';
/**
 * Normalizes PNG image data to a standard RGBA format
 *
 * @param indata - Input image data buffer
 * @param imageData - Image metadata and parameters
 * @param skipRescale - Whether to skip bit depth rescaling
 * @returns Normalized image data buffer
 * @throws {Error} If palette index is invalid
 */
export declare function normalizeFormat(indata: Buffer, imageData: ImageData, skipRescale?: boolean): Buffer;
declare interface ImageData {
  depth: number
  width: number
  height: number
  colorType: number
  transColor?: number[]
  palette?: Color[]
}
/**
 * Format normalizer for PNG image data.
 * Handles palette conversion, transparency, and bit depth scaling.
 */
declare type Color = [number, number, number, number];
// Default export for backward compatibility
export default normalizeFormat;