/**
 * moved from sparkline module -- not sure why this needed a separate
 * module. although on reflection it might be better placed in the charts
 * module? (...)
 *
 * perhaps not because we use that module elsewhere and this one is only
 * ever used in spreadsheets.
 *
 */
import { type Cell, type CellStyle } from '../../../treb-base-types/src/index';
export interface SparklineRenderOptions {
    context: CanvasRenderingContext2D;
    width: number;
    height: number;
    cell: Cell;
}
export declare class Sparkline {
    static readonly default_color = "#888";
    /**
     * three possible cases:
     *
     * (1) array of numbers, possibly including missing values
     * (2) typed array
     * (3) nested array, so we need to recurse and concatenate
     *
     * there's actually one more case, where data comes in from serialized
     * representation (loading file); in that case it's an object with numeric
     * indexes (sadly)
     */
    protected static UnpackValues(underlying: unknown): number[];
    protected static SparklineCommon(cell: Cell, style: CellStyle): {
        values: Array<number | undefined>;
        colors: string[];
    };
    static RenderLine(width: number, height: number, context: CanvasRenderingContext2D, cell: Cell, style: CellStyle): void;
    static RenderColumn(width: number, height: number, context: CanvasRenderingContext2D, cell: Cell, style: CellStyle): void;
}