import type { Gradient } from '../types/slides';
export declare const DEFAULT_FREEHAND_SIZE = 6;
export type FreehandPoint = {
    x: number;
    y: number;
    pressure?: number;
};
export type FreehandCapOptions = {
    cap?: boolean;
    taper?: number | boolean;
};
export type FreehandStrokeOptions = {
    last?: boolean;
    thinning?: number;
    simulatePressure?: boolean;
    streamline?: number;
    smoothing?: number;
    start?: FreehandCapOptions;
    end?: FreehandCapOptions;
};
export declare const shouldKeepFreehandPoint: (from: FreehandPoint, to: FreehandPoint, simulatePressure?: boolean) => boolean;
/**
 * Keep raw pointer spacing. Evenly interpolating jumps flattens velocity, which
 * is what perfect-freehand uses to simulate pressure.
 */
export declare const appendFreehandPoint: (points: FreehandPoint[], next: FreehandPoint, simulatePressure?: boolean) => void;
export declare const shouldSimulatePressure: (e: PointerEvent) => boolean;
export declare const readPointerPressure: (e: PointerEvent) => number;
export declare const pointerStrokeSamples: (e: PointerEvent) => PointerEvent[];
/**
 * Excalidraw's outline → SVG path: quadratic midpoints, then close.
 * See getSvgPathFromStroke in packages/element/src/shape.ts.
 */
export declare const getSvgPathFromStroke: (points: number[][]) => string;
export declare const getFreehandOutline: (points: FreehandPoint[], size: number, options?: FreehandStrokeOptions) => import("perfect-freehand").Vec2[];
export declare const getFreehandSvgPath: (points: FreehandPoint[], size: number, options?: FreehandStrokeOptions) => string;
export declare const getFreehandPath: (points: FreehandPoint[], size: number, options?: FreehandStrokeOptions) => Path2D;
export type FreehandShapeGeometry = {
    path: string;
    viewBox: [number, number];
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
};
export declare const getFreehandShapeGeometry: (points: FreehandPoint[], size: number, options?: FreehandStrokeOptions, minViewBox?: number) => FreehandShapeGeometry | null;
export declare const joinFreehandStrokes: (strokes: Array<{
    points: FreehandPoint[];
    size: number;
    options?: FreehandStrokeOptions;
}>, minViewBox?: number) => FreehandShapeGeometry | null;
export declare const joinFreehandOutlines: (outlines: number[][][], minViewBox?: number) => FreehandShapeGeometry;
export declare const fillFreehandStroke: (ctx: CanvasRenderingContext2D, points: FreehandPoint[], size: number, color: string, options?: FreehandStrokeOptions & {
    alpha?: number;
    composite?: GlobalCompositeOperation;
    gradient?: Gradient;
}) => void;