import type { MagicalInkId } from '../configs/inkPaint';
import type { Gradient } from '../types/slides';
import type { Command } from './commandHistory';
export type ShapeType = 'rect' | 'circle' | 'arrow' | 'line' | 'triangle';
export type InkStrokePaint = {
    color: string;
    gradient?: Gradient;
    gradientId?: MagicalInkId;
};
export type PenStroke = InkStrokePaint & {
    kind: 'pen';
    size: number;
    points: Array<{
        x: number;
        y: number;
        pressure?: number;
    }>;
    simulatePressure?: boolean;
};
export type MarkStroke = InkStrokePaint & {
    kind: 'mark';
    size: number;
    points: Array<{
        x: number;
        y: number;
        pressure?: number;
    }>;
    simulatePressure?: boolean;
};
export type EraserStroke = {
    kind: 'eraser';
    size: number;
    points: Array<{
        x: number;
        y: number;
    }>;
};
export type ShapeStroke = InkStrokePaint & {
    kind: 'shape';
    shapeType: ShapeType;
    size: number;
    startX: number;
    startY: number;
    endX: number;
    endY: number;
};
export type Stroke = PenStroke | MarkStroke | EraserStroke | ShapeStroke;
export interface DrawingSurface {
    strokes: Stroke[];
    baseline: HTMLImageElement | null;
    redraw: () => void;
}
export declare const strokeHasInk: (stroke: Stroke) => boolean;
export declare class AddStrokeCommand implements Command {
    private readonly surface;
    private readonly stroke;
    constructor(surface: DrawingSurface, stroke: Stroke);
    do(): void;
    undo(): void;
}
export declare class ClearInkCommand implements Command {
    private readonly surface;
    private removedStrokes;
    private removedBaseline;
    constructor(surface: DrawingSurface);
    do(): void;
    undo(): void;
}