export interface RasterProcessingOptions {
    quality: number;
    lossless?: boolean;
    qualitySize: string | null;
    width: number | null;
    height: number | null;
    modeWH: "cover" | "proportion" | "fill" | null;
    preventEnlargement?: boolean;
}
export declare class RasterOptimizer {
    /**
     * Convert PNG to WebP
     */
    convertToWebP(inputPath: string, outputPath: string, settings: RasterProcessingOptions): Promise<{
        originalSize: number;
        optimizedSize: number;
        saved: number;
    }>;
    /**
     * Convert PNG to GIF
     */
    convertToGif(inputPath: string, outputPath: string, settings: RasterProcessingOptions): Promise<{
        originalSize: number;
        optimizedSize: number;
        saved: number;
    }>;
    /**
     * Optimize PNG
     */
    optimizePng(inputPath: string, outputPath: string, settings: RasterProcessingOptions): Promise<{
        originalSize: number;
        optimizedSize: number;
        saved: number;
    }>;
    /**
     * Optimize JPEG
     */
    optimizeJpeg(inputPath: string, outputPath: string, settings: RasterProcessingOptions): Promise<{
        originalSize: number;
        optimizedSize: number;
        saved: number;
    }>;
    /**
     * Apply resize based on width/height/modeWH settings
     */
    private applyResize;
    /**
     * Enforce qualitySize by iteratively reducing quality
     */
    private enforceQualitySize;
    private wouldEnlarge;
    /**
     * Parse qualitySize string to bytes
     */
    private parseQualitySize;
    /**
     * Get WebP quality based on settings
     */
    private getWebPQuality;
    /**
     * Get PNG compression level based on quality
     */
    private getPngCompressionLevel;
    /**
     * Get JPEG quality based on settings
     */
    private getJpegQuality;
}