import { Cache } from './util/cache';
import { Texture2D, ImageDrawer } from './texture';
import { Color } from './color';
import { TwoKeyCache, ThreeKeyCache, SixKeyCache } from './util/multikey_cache';
import { BoundsUnmodifiable } from './bounds';
export declare const getTextWidth: (font: string, text: string) => number;
export declare class TextTexture2D extends Texture2D {
    private _jBaseline;
    get jBaseline(): number;
    constructor(w: number, h: number, jBaseline: number, minFilter: number, magFilter: number, draw: ImageDrawer);
    yAnchor(textFrac: number): number;
}
export declare function newTextTextureCache(font: string, color: Color): Cache<TextTexture2D>;
export declare function newTextTextureCache2(font: string): TwoKeyCache<TextTexture2D>;
export declare function newTextTextureCache3(): ThreeKeyCache<TextTexture2D>;
export declare function newTextTextureCache6(): SixKeyCache<TextTexture2D>;
export declare type TextTextureFactory = (color: Color, text: string, bgColor?: Color, bgPadding?: number, bgBorderRadius?: number) => TextTexture2D;
export declare function createTextTextureFactory(font: string): TextTextureFactory;
export declare function newTextHintsCache(font: string): Cache<Texture2D>;
export declare class HintedTextRenderer {
    private textRenderer_VERTSHADER;
    private textRenderer_FRAGSHADER;
    private program;
    private u_XyFrac;
    private u_Anchor;
    private u_ImageSize;
    private u_ViewportSize;
    private u_Alpha;
    private u_Hints;
    private a_ImageFrac;
    private imageFracData;
    private wViewport;
    private hViewport;
    constructor();
    begin(gl: WebGLRenderingContext, viewport: BoundsUnmodifiable): void;
    draw(gl: WebGLRenderingContext, hints: Texture2D, xFrac: number, yFrac: number, options?: {
        xAnchor?: number;
        yAnchor?: number;
        color?: Color;
    }): void;
    end(gl: WebGLRenderingContext): void;
}