/**
 * Size and aspect ratio presets for image generation.
 */
export interface SizePreset {
    name: string;
    description: string;
    parameters: {
        width: number;
        height: number;
        aspect_ratio?: string;
        recommended_for?: string[];
    };
}
export declare const sizePresets: Record<string, SizePreset>;
/**
 * Get the closest size preset for given dimensions.
 */
export declare function findClosestSizePreset(width: number, height: number): SizePreset;
/**
 * Scale dimensions to fit within maximum size while maintaining aspect ratio.
 */
export declare function scaleToMaxSize(width: number, height: number, maxSize: number): {
    width: number;
    height: number;
};