interface Schema {
    name: string;
    type: string;
    position: {
        x: number;
        y: number;
    };
    width: number;
    height: number;
    [key: string]: unknown;
}
/**
 * Draw grid lines and schema boundary overlays on a generated PDF page image.
 * Used by `pdfme generate --grid`.
 */
export declare function drawGridOnImage(imageBuffer: ArrayBuffer, schemas: Schema[], gridSizeMm: number, pageWidthMm: number, pageHeightMm: number): Promise<ArrayBuffer>;
/**
 * Draw grid lines with mm coordinate labels on a plain PDF image.
 * Used by `pdfme pdf2img --grid`.
 */
export declare function drawGridOnPdfImage(imageBuffer: ArrayBuffer, gridSizeMm: number, pageWidthMm: number, pageHeightMm: number): Promise<ArrayBuffer>;
export {};