import type { RenderArgsDeserializedWithFeaturesAndLayout } from './types';
export declare function makeImageData({ ctx, canvasWidth, canvasHeight, renderArgs, }: {
    ctx: CanvasRenderingContext2D;
    canvasWidth: number;
    canvasHeight: number;
    renderArgs: RenderArgsDeserializedWithFeaturesAndLayout;
}): Promise<{
    mafs: {
        feature: import("@jbrowse/core/util").Feature;
        mostFrequentAlt: string;
        alleleCounts: Map<string, number>;
    }[];
    arr: string[][];
}>;