/**
 * Applies a stroke-level opacity ceiling to a canvas context.
 *
 * Flow accumulates per-stamp on strokeCanvas (that's intentional).
 * Opacity is a hard ceiling applied once when transferring the whole
 * stroke to the visible canvas — independent of stamp count or spacing.
 *
 * @param ctx     The context to configure (transferContext)
 * @param opacity 0.0–1.0 stroke opacity ceiling
 */
export declare function applyStrokeOpacity(ctx: CanvasRenderingContext2D, opacity: number): void;
/**
 * Resets a context's globalAlpha to fully opaque.
 *
 * Call this after compositing to avoid leaking opacity
 * state into subsequent draw operations on the same context.
 */
export declare function resetOpacity(ctx: CanvasRenderingContext2D): void;
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