import { VideoFrame } from '../../Private/AgoraMediaBase';
import { RendererContext } from '../../Types';
import { IRenderer } from '../IRenderer';
export type WebGLFallback = (renderer: WebGLRenderer, error: Error) => void;
export declare class WebGLRenderer extends IRenderer {
    gl: WebGLRenderingContext | WebGL2RenderingContext | null;
    program: WebGLProgram | null;
    positionLocation?: number;
    texCoordLocation?: number;
    yTexture: WebGLTexture | null;
    uTexture: WebGLTexture | null;
    vTexture: WebGLTexture | null;
    aTexture: WebGLTexture | null;
    hasAlpha: WebGLUniformLocation | null;
    texCoordBuffer: WebGLBuffer | null;
    surfaceBuffer: WebGLBuffer | null;
    fallback?: WebGLFallback;
    private colorSpaceUniforms;
    constructor(fallback?: WebGLFallback);
    bind(context: RendererContext): void;
    unbind(): void;
    drawFrame(uid: number, { width, height, yStride, uStride, vStride, yBuffer, uBuffer, vBuffer, rotation, alphaBuffer, colorSpace, }: VideoFrame): void;
    protected rotateCanvas({ width, height, rotation }: VideoFrame): void;
    private initTextures;
    private releaseTextures;
    private handleContextLost;
    private handleContextRestored;
    /**
     * Get color space conversion parameters based on color space and range
     */
    private getColorSpaceParams;
    /**
     * Set color space uniform values in the shader
     */
    private setColorSpaceUniforms;
}
//# sourceMappingURL=index.d.ts.map