import { Canvas } from 'canvas';
import type { NodeChartData } from '../renderer/types.js';
export interface ComparisonLayout {
    type: 'side-by-side' | 'grid';
    columns?: number;
    rows?: number;
    gap?: number;
}
export interface ComparisonChart {
    data: NodeChartData;
    position: {
        x: number;
        y: number;
        width: number;
        height: number;
    };
}
export declare class ComparisonRenderer {
    private canvas;
    private ctx;
    private width;
    private height;
    private charts;
    private layout;
    constructor(width: number, height: number, layout?: ComparisonLayout);
    addChart(chartData: NodeChartData, position?: {
        x: number;
        y: number;
        width: number;
        height: number;
    }): void;
    renderComparison(): Promise<void>;
    private renderChartInPosition;
    private calculatePosition;
    private adjustMargins;
    exportComparison(options: {
        format: 'png' | 'jpeg' | 'jpg';
        quality?: number;
    }): Promise<Buffer>;
    saveComparison(outputPath: string, options: {
        format: 'png' | 'jpeg' | 'jpg';
        quality?: number;
    }): Promise<void>;
    getCanvas(): Canvas;
}