/**
 * SVG `transform` attribute parsing and exact affine application.
 *
 * A matrix is stored as the 6-tuple [a, b, c, d, e, f] matching SVG's
 * matrix(a b c d e f), i.e.
 *     x' = a*x + c*y + e
 *     y' = b*x + d*y + f
 *
 * Lines and beziers transform exactly by mapping their control points. Arcs are
 * handled exactly too: the unit-circle-to-ellipse matrix is rebuilt and
 * re-decomposed (2x2 SVD) so a transformed circle/ellipse arc remains an exact
 * (possibly rotated) ellipse arc, with sweep orientation flipped on reflection.
 */
import { Base } from "@bitbybit-dev/base";
import { SvgSegment, SvgSubpath } from "./svg-models";
export type Matrix = [number, number, number, number, number, number];
export declare const IDENTITY: Matrix;
/** Compose so the result applied to a point = m1(m2(point)). */
export declare function multiply(m1: Matrix, m2: Matrix): Matrix;
export declare function applyToPoint(m: Matrix, p: Base.Point2): Base.Point2;
/** Parse a `transform` attribute value into a single composed matrix. */
export declare function parseTransform(value: string | undefined | null): Matrix;
export declare function transformSegment(m: Matrix, seg: SvgSegment): SvgSegment;
export declare function transformSubpath(m: Matrix, sp: SvgSubpath): SvgSubpath;