export declare function shortestRectDistance(a: DOMRect, b: DOMRect): number;
export declare function isHorizontalNeighbour(anchorRect: DOMRect, targetRect: DOMRect, overlapMin: number, attachRange: number): boolean;
export declare function isVerticalNeighbour(anchorRect: DOMRect, targetRect: DOMRect, overlapMin: number, attachRange: number): boolean;
export declare function roundRectPath(ctx: CanvasRenderingContext2D, x: number, y: number, w: number, h: number, r: number): void;
export interface DrawDst {
    x: number;
    y: number;
    w: number;
    h: number;
    flipX: boolean;
    flipY: boolean;
    /** Source-rect origin in the anchor canvas, device px. Non-zero while the
     *  anchor is overscanned (vector bend) so only its CSS box is sampled. */
    sx?: number;
    sy?: number;
}
export declare function drawSource(ctx: CanvasRenderingContext2D, src: CanvasImageSource, sw: number, sh: number, dst: DrawDst): void;
export interface BoxRect {
    x: number;
    y: number;
    w: number;
    h: number;
    r: number;
}
export declare function maskedFillPasses(ctx: CanvasRenderingContext2D, src: CanvasImageSource, sw: number, sh: number, tw: number, th: number, totalAlpha: number, grad: CanvasGradient, dst: DrawDst, fillBox: BoxRect, dpr: number, 
/** Override for the edge band the fill is clipped to, device px. Glyph
 *  targets pass the whole box — letters have no "rim" to hug. */
bandDevPxOverride?: number): void;
export declare function maskedStrokePasses(ctx: CanvasRenderingContext2D, src: CanvasImageSource, sw: number, sh: number, tw: number, th: number, strokeBox: BoxRect, intensity: number, strokeBandPx: number, grad: CanvasGradient, strokeExtraAlpha: number, dst: DrawDst): void;
export declare function drawBorderHighlight(ctx: CanvasRenderingContext2D, strokeBox: BoxRect, strokeDevPx: number, g0x: number, g0y: number, g1x: number, g1y: number, alpha: number): void;