import { Transform, TransformCallback } from 'node:stream';
import { BufferWithMeta, FileMetadata, IconTune } from '../../types';
export declare class TransformPrepareIcons extends Transform {
    /**
     * Symbol glyph size
     * @default 480
     */
    _shapeSize: number;
    /**
     * The displayed area
     * @default 2048
     */
    _symbolBoxSize: number;
    _startUnicode: number;
    _currentUnicode: number;
    _bookedCodes: Set<number>;
    _iconsOptions: {
        [name: string]: IconTune;
    };
    _disableAutoalign: boolean;
    constructor(iconsOptions?: {
        [name: string]: IconTune;
    }, shapeSizeAdjust?: number, startUnicode?: number, disableAutoalign?: boolean);
    private _sizeAndPos;
    private _adjustSize;
    private _adjustAlign;
    private _parseTransformAttr;
    private _parseViewBoxAttr;
    _transform(chunk: BufferWithMeta<FileMetadata>, _encoding: any, callback: TransformCallback): void;
}