import { Matrix } from 'transformation-matrix';
import { TransformMatrix } from '../helpers.js';
import { Sprite } from '../controllers/sprites/Sprite.js';
/**
 * Shared geometry layer consumed by BOTH idml2svg (dev preview) and
 * idml2serial (Bluepic import). Both serializers are projections of the same
 * resolved layout — the transform math lives here once, not duplicated.
 */
/** Convert an IDML 6-tuple item transform into a transformation-matrix Matrix. */
export declare function itemTransform2Matrix(itemTransform?: TransformMatrix): Matrix;
/**
 * The sprite's transform re-expressed in its parent page's coordinate frame —
 * identical to what idml2svg renders. A sprite's itemTransform is originated in
 * the page coordinate system (at 0,0), so we inverse the page matrix, apply the
 * sprite transform, then re-apply the page matrix.
 */
export declare function bakeSpriteMatrix(sprite: Sprite, pageMatrix: Matrix): Matrix;
/** A 2D affine decomposed into the component form Bluepic's Transform uses. */
export type DecomposedTransform = {
    translateX: number;
    translateY: number;
    rotate: number;
    skewX: number;
    skewY: number;
    scaleX: number;
    scaleY: number;
};
/**
 * Decompose a matrix into `T · R · skewX · S` — exactly the order
 * @bluepic/core composes an element transform (with transform-origin at 0,0).
 * Handles rotation, non-uniform scale, flips, and shear (folded into skewX).
 */
export declare function decomposeMatrix(m: Matrix): DecomposedTransform;
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