import { GLsizei2 } from './tuples';
import { Bindable } from './bindable';
import { AbstractObject } from './object';
/**
 * WebGL Renderbuffer implementation providing size accessors and requiring for bind, unbind, resize, validity, and
 * initialization implementations.
 * ```
 * @todo add usage example
 * ```
 */
export declare class Renderbuffer extends AbstractObject<WebGLRenderbuffer> implements Bindable {
    /**
     * Default renderbuffer, e.g., used for unbind.
     */
    static readonly DEFAULT_RENDER_BUFFER: undefined;
    /** @see {@link width} */
    protected _width: GLsizei;
    /** @see {@link height} */
    protected _height: GLsizei;
    /**
     * Cached internal format of the renderbuffer for efficient resize.
     */
    protected _internalFormat: GLenum | undefined;
    /**
     * Cached sample count for multisampling.
     */
    protected _samples: GLsizei;
    /**
     * Create a renderbuffer object on the GPU.
     * @param width - Initial width of the renderbuffer.
     * @param height - Initial height of the renderbuffer.
     * @param internalFormat - Internal format of the renderbuffer data.
     */
    protected create(width: GLsizei, height: GLsizei, internalFormat: GLenum, samples?: number): WebGLRenderbuffer | undefined;
    /**
     * Delete the renderbuffer object on the GPU. This should have the reverse effect of `create`.
     */
    protected delete(): void;
    /**
     * Bind the renderbuffer object.
     */
    bind(): void;
    /**
     * Unbind the renderbuffer object.
     */
    unbind(): void;
    /**
     * This should be used to implement efficient resize for all attachments.
     * @param width - Targeted/new width of the renderbuffer in px.
     * @param height - Targeted/new height of the renderbuffer in px.
     * @param bind - Allows to skip binding the renderbuffer (e.g., when binding is handled outside).
     * @param unbind - Allows to skip unbinding the renderbuffer (e.g., when binding is handled outside).
     */
    resize(width: GLsizei, height: GLsizei, bind?: boolean, unbind?: boolean): void;
    /**
     * Returns the number of bytes this object approximately allocates on the GPU.
     */
    get bytes(): GLsizei;
    /**
     * Readonly access to the internal format of the renderbuffer object. This can only be changed by re-initialization.
     */
    get internalFormat(): GLenum;
    /**
     * Convenience accessor: returns the width of the texture object.
     */
    get width(): GLsizei;
    /**
     * Convenience accessor: returns the height of the texture object.
     */
    get height(): GLsizei;
    /**
     * Convenience accessor: sample count for multisampling.
     */
    get samples(): GLsizei;
    /**
     * Convenience accessor: if multisampling is enabled.
     */
    get multisampling(): boolean;
    /**
     * Convenience getter for the 2-tuple containing the render buffer's width and height.
     * @see {@link width}
     * @see {@link heigth}
     */
    get size(): GLsizei2;
}