import { CanvasLike, GlobalRuntime } from '@antv/g-lite';
import type { Device, Texture } from '@antv/g-device-api';
import type { StyleGlyph } from './AlphaImage';
import GlyphAtlas from './GlyphAtlas';
export type PositionedGlyph = {
    glyph: number;
    x: number;
    y: number;
    scale: number;
    fontStack: string;
};
export declare const BASE_FONT_WIDTH = 24;
export declare const BASE_FONT_BUFFER = 3;
export declare function isCJK(char: number): boolean;
export declare function getDefaultCharacterSet(): string[];
/**
 * TODO: use one atlas for all fontstacks, each fontstack has one texture now
 */
export declare class GlyphManager {
    private runtime;
    private sdfGeneratorCache;
    private textMetricsCache;
    private glyphAtlas;
    private glyphMap;
    private glyphAtlasTexture;
    constructor(runtime: GlobalRuntime);
    destroy(): void;
    getMap(): Record<string, Record<number, StyleGlyph>>;
    getAtlas(): GlyphAtlas;
    getAtlasTexture(): Texture;
    layout(lines: string[], fontStack: string, lineHeight: number, textAlign: CanvasTextAlign | 'middle', letterSpacing: number, offsetX: number, offsetY: number): PositionedGlyph[];
    generateAtlas(canvas: CanvasLike, fontStack: string, fontFamily: string, fontWeight: string, fontStyle: string, text: string, device: Device): void;
    private generateSDF;
}
//# sourceMappingURL=GlyphManager.d.ts.map