import { DepthBuffer, FrameBuffer, FrameBufferOptions, Texture } from '../../resources';
import { DeviceGL } from '../DeviceGL';
/**
 * @public
 */
export declare class FrameBufferGL extends FrameBuffer {
    readonly device: DeviceGL;
    readonly handle: WebGLFramebuffer;
    private colorAttachments;
    private depthAttachment;
    private colorAttachmentCountField;
    private colorAttachmentPoints;
    private maxColorAttachments;
    private drawBuffersExtension;
    constructor(device: DeviceGL, options?: FrameBufferOptions);
    get colorAttachmentCount(): number;
    init(options?: FrameBufferOptions): this;
    destroy(): void;
    static validateAttachments(textures?: Texture[], depth?: DepthBuffer): boolean;
    unsetSamplersUsedAsAttachments(): void;
    private assign;
}
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