import type { CanvasGeometry, DragMode, ImgCropperResult, ImgCropperWorker, ImgCropperWorkerParams } from './img-cropper-worker.svelte';
import type { CropperCanvas, CropperImage, CropperSelection } from 'cropperjs';
export declare abstract class ImgCropperBaseWorker implements ImgCropperWorker {
    cropBoxVisible: boolean;
    dragMode: DragMode;
    canvasGeometry: CanvasGeometry;
    destroy: () => void;
    protected _image: CropperImage;
    protected _selection: CropperSelection;
    protected _canvas: CropperCanvas;
    protected _selectHandle: HTMLElement | null;
    protected _originalSrc: string;
    protected _sourceMime: string | null;
    protected _visualWidth: number;
    protected _visualHeight: number;
    protected abstract readonly _centerMode: 'contain' | 'cover';
    constructor(params: ImgCropperWorkerParams);
    ready: () => Promise<void>;
    rotate: () => Promise<void>;
    zoomIn: () => void;
    zoomOut: () => void;
    reset: () => Promise<void>;
    crop: (options?: {
        fillColor?: string;
    }) => Promise<ImgCropperResult | null>;
    save: (options?: {
        fillColor?: string;
    }) => Promise<ImgCropperResult>;
    clearSelection: () => void;
    refit: () => Promise<void>;
    enableCropMode: () => void;
    protected _wrapTransformOp: (fn: () => void) => void;
    protected _applyMoveMode: () => void;
    protected _resolveOutputFormat: (fillColor: string | undefined) => {
        mime: string;
        quality: number;
    };
    protected _fitImage: () => Promise<void>;
    protected abstract _computeCanvasSize(): void;
}