export interface TransformSpec {
    w?: number;
    h?: number;
    fit?: 'fill' | 'inside';
    format?: 'webp' | 'jpeg' | 'png' | 'avif';
    quality?: number;
}
export declare function transformImage(input: Buffer, spec: TransformSpec): Promise<Buffer>;
export declare function transformHash(spec: TransformSpec): string;
export declare function parseTransformSpec(query: Record<string, string>): TransformSpec | null;
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