import type { LayoutFeature } from './util';
import type { Region } from '@jbrowse/core/util';
export declare function renderPerBaseLettering({ ctx, feat, region, bpPerPx, colorMap, colorContrastMap, charWidth, charHeight, canvasWidth, cigarOps, }: {
    ctx: CanvasRenderingContext2D;
    feat: LayoutFeature;
    region: Region;
    bpPerPx: number;
    colorMap: Record<string, string>;
    colorContrastMap: Record<string, string>;
    charWidth: number;
    charHeight: number;
    canvasWidth: number;
    cigarOps: string[];
}): void;