/**
 * Effects Renderer
 *
 * Handles rendering effects including:
 * - Opacity effects
 * - Transform effects (matrix transformations)
 * - Clip effects (overflow / border-radius clipping via Path[])
 * - Clip-path effects (CSS clip-path shapes: inset, circle, ellipse, polygon, path)
 */
import { IElementEffect } from '../effects';
import { Path } from '../path';
/**
 * Dependencies required for EffectsRenderer
 */
export interface EffectsRendererDependencies {
    ctx: CanvasRenderingContext2D;
}
/**
 * Path callback for clip effects
 */
export interface EffectsPathCallback {
    path(paths: Path[]): void;
}
/**
 * Effects Renderer
 *
 * Manages rendering effects stack including opacity, transforms, and clipping.
 * Extracted from CanvasRenderer to improve code organization and maintainability.
 */
export declare class EffectsRenderer {
    private readonly ctx;
    private readonly pathCallback;
    private readonly activeEffects;
    constructor(deps: EffectsRendererDependencies, pathCallback: EffectsPathCallback);
    /**
     * Apply multiple effects
     * Clears existing effects and applies new ones
     *
     * @param effects - Array of effects to apply
     */
    applyEffects(effects: IElementEffect[]): void;
    /**
     * Apply a single effect
     *
     * @param effect - Effect to apply
     */
    applyEffect(effect: IElementEffect): void;
    /**
     * Remove the most recent effect
     * Restores the canvas state before the effect was applied
     */
    popEffect(): void;
    /**
     * Get the current number of active effects
     *
     * @returns Number of active effects
     */
    getActiveEffectCount(): number;
    /**
     * Check if there are any active effects
     *
     * @returns True if there are active effects
     */
    hasActiveEffects(): boolean;
}