import { fabric } from "fabric";
import type { Bounds } from "../types";
/**
 * Create overlay rectangles for crop mode
 * Creates 4 rectangles to darken the area outside the image bounds
 */
export declare function createCropOverlays(canvasWidth: number, canvasHeight: number, imgBounds: Bounds): fabric.Rect[];
/**
 * Create crop rectangle with visual styling
 */
export declare function createCropRect(imgBounds: Bounds): fabric.Rect;
/**
 * Create dimension label for crop rect
 */
export declare function createCropLabel(rect: fabric.Rect): fabric.Textbox;
/**
 * Update crop label text and position
 */
export declare function updateCropLabel(label: fabric.Textbox, rect: fabric.Rect): {
    width: number;
    height: number;
};
/**
 * Constrain crop rect to stay inside image bounds
 */
export declare function constrainCropRectInside(rect: fabric.Rect, imgBounds: Bounds): void;
/**
 * Limit crop rect scale to available space
 */
export declare function limitCropRectScale(rect: fabric.Rect, imgBounds: Bounds): void;
/**
 * Calculate crop coordinates in image pixel space
 */
export declare function calculateCropCoordinates(cropRect: fabric.Rect, image: fabric.Image, viewportTransform: number[]): {
    x: number;
    y: number;
    width: number;
    height: number;
};