import { BrushBasicConfig } from "../types/config";
import { DynamicTransparencyBasicConfig, DynamicTransparencyConfig } from "../types/dynamicTransparency";
/**
 * Adds random and pressure-driven opacity/flow variation.
 *
 * Useful for:
 * - watercolor brushes
 * - dry brushes
 * - airbrush effects
 * - organic accumulation
 */
export declare class DynamicTransparencyModule {
    config: DynamicTransparencyBasicConfig;
    private strokeOpacity;
    constructor(config?: DynamicTransparencyConfig);
    bindConfig(config: DynamicTransparencyBasicConfig): void;
    private changeOpacity;
    private changeFlow;
    onChangeConfig(config: BrushBasicConfig, pressure: number): void;
    /**
     * Reset cached stroke opacity after stroke ends.
     */
    onEndStroke(): void;
}
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