import type { Gradient } from '../types/slides';
export type MagicalInkId = 'rainbow' | 'sunset' | 'aurora' | 'holographic';
export type InkPaint = {
    color: string;
    gradient?: Gradient;
    gradientId?: MagicalInkId;
};
export type MagicalInkGradient = {
    id: MagicalInkId;
    color: string;
    gradient: Gradient;
    css: string;
};
/** Compact marker palette: neutrals plus a full hue set (red → violet). */
export declare const INK_SOLID_SWATCHES: string[];
export declare const MAGICAL_INK_GRADIENTS: MagicalInkGradient[];
export declare const solidPaint: (color: string) => InkPaint;
export declare const paintFromPreset: (preset: MagicalInkGradient) => InkPaint;
export declare const samePaint: (a: InkPaint, b: InkPaint) => boolean;
export declare const paintKey: (paint: Pick<InkPaint, 'color' | 'gradientId'>) => string;
export declare const cloneGradient: (gradient: Gradient) => Gradient;
export declare const isLightColor: (color: string) => boolean;
export declare const boundsFromPoints: (points: Array<{
    x: number;
    y: number;
}>, pad?: number) => {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
};
export declare const createCanvasPaint: (ctx: CanvasRenderingContext2D, paint: Pick<InkPaint, 'color' | 'gradient'>, box: {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
}) => string | CanvasGradient;