/**
 * Canvas mock utilities for testing
 *
 * Provides mock implementations of Canvas 2D context
 * for testing chart and graphics code.
 *
 * @example
 * ```typescript
 * // Setup canvas mocks before tests
 * setupCanvasMocks();
 *
 * // Now canvas operations won't throw
 * const canvas = document.createElement('canvas');
 * const ctx = canvas.getContext('2d');
 * ctx.fillRect(0, 0, 100, 100); // Works in jsdom
 * ```
 */
/**
 * Mock Canvas 2D rendering context
 */
export interface MockCanvasContext {
    fillRect: () => void;
    clearRect: () => void;
    strokeRect: () => void;
    fillText: () => void;
    strokeText: () => void;
    measureText: (text: string) => {
        width: number;
    };
    beginPath: () => void;
    closePath: () => void;
    moveTo: () => void;
    lineTo: () => void;
    arc: () => void;
    arcTo: () => void;
    bezierCurveTo: () => void;
    quadraticCurveTo: () => void;
    rect: () => void;
    fill: () => void;
    stroke: () => void;
    clip: () => void;
    save: () => void;
    restore: () => void;
    scale: () => void;
    rotate: () => void;
    translate: () => void;
    transform: () => void;
    setTransform: () => void;
    resetTransform: () => void;
    drawImage: () => void;
    createImageData: () => {
        data: Uint8ClampedArray;
        width: number;
        height: number;
    };
    getImageData: () => {
        data: Uint8ClampedArray;
        width: number;
        height: number;
    };
    putImageData: () => void;
    createLinearGradient: () => {
        addColorStop: () => void;
    };
    createRadialGradient: () => {
        addColorStop: () => void;
    };
    createPattern: () => null;
    isPointInPath: () => boolean;
    isPointInStroke: () => boolean;
    getLineDash: () => number[];
    setLineDash: () => void;
    canvas: {
        width: number;
        height: number;
    };
    fillStyle: string;
    strokeStyle: string;
    lineWidth: number;
    lineCap: string;
    lineJoin: string;
    miterLimit: number;
    lineDashOffset: number;
    font: string;
    textAlign: string;
    textBaseline: string;
    globalAlpha: number;
    globalCompositeOperation: string;
    shadowBlur: number;
    shadowColor: string;
    shadowOffsetX: number;
    shadowOffsetY: number;
    imageSmoothingEnabled: boolean;
}
/**
 * Creates a mock Canvas 2D context
 *
 * @returns A mock context object
 */
export declare function createMockCanvasContext(): MockCanvasContext;
/**
 * Sets up canvas mocks on HTMLCanvasElement prototype
 *
 * Call this in your test setup (beforeAll/beforeEach) to enable
 * canvas operations in jsdom environment.
 */
export declare function setupCanvasMocks(): void;
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