import { PipelineConfig } from '../config-types';
import { FrameData, LadonOutput } from '../generator';
type TextureInitializer = () => void;
export declare abstract class WebGLRenderer {
    output_canvas: HTMLCanvasElement;
    readonly config: PipelineConfig;
    protected intermediate_canvas?: HTMLCanvasElement;
    protected output_canvas_2d?: CanvasRenderingContext2D;
    protected gl: WebGL2RenderingContext;
    protected image_texture: WebGLTexture;
    protected mask_texture: WebGLTexture;
    protected verts: Float32Array;
    protected vertex_shader_src: string;
    protected fragment_shader_header: string;
    protected shared_shader_functions: string;
    constructor(output_canvas: HTMLCanvasElement, config: PipelineConfig);
    protected initTexturesAndBuffers(): void;
    protected createTexture(internalFormat: number, width: number, height: number, initializeTexture?: TextureInitializer): WebGLTexture;
    protected getUVCalculation(): "vec2 st = vec2(1.0 - gl_FragCoord.x / u_resolution.x, 1.0 - gl_FragCoord.y / u_resolution.y);" | "vec2 st = vec2(gl_FragCoord.x / u_resolution.x, 1.0 - gl_FragCoord.y / u_resolution.y);";
    protected setSharedUniforms(program: WebGLProgram): void;
    protected uploadVideoStream(input: FrameData): void;
    protected uploadMask(mask?: LadonOutput): void;
    protected postDraw(): void;
}
export {};