import { Device } from '../../Device';
import { Texture, TextureDataOption, TextureOptions, TextureSourceOption } from '../../resources/Texture';
/**
 * Describes a texture object.
 *
 * @public
 */
export declare class TextureGL extends Texture {
    readonly device: Device<WebGLRenderingContext>;
    readonly handle: WebGLTexture;
    /**
     * Determines whether this is a cubemap face
     */
    readonly isFace: boolean;
    /**
     * Constructs an instance of a Texture.
     *
     * @remarks
     * The options are passed down to {@link Texture.setup}
     */
    constructor(device: Device<WebGLRenderingContext>, options?: TextureOptions);
    create(): this;
    /**
     * Releases all resources and notifies the device that the texture is being destroyed.
     */
    destroy(): this;
    /**
     * Binds the texture to the gl context.
     *
     * @returns the previously bound texture handle
     */
    bind(): this;
    /**
     * Sets the texture source from data array or buffer
     *
     * @remarks
     * Sets current {@link source} property to null and uses given data as texture source.
     * If data is a plain javascript array or an ArrayBuffer, a TypedArray is instantiated
     * based on current {@link pixelType} respecting WebGL rules for array buffers types.
     *
     * If width and height are given they are used as new texture widht and height values.
     *
     * Given data must match the width and heigth otherwise WebGL will complain.
     *
     * @param data - The texture data to be set
     * @param width - The new texture width
     * @param height - The new texture height
     */
    setData(data: TextureDataOption, width?: number, height?: number): this;
    setFaces(faces: TextureSourceOption[]): this;
    /**
     * Updates the texture from current image source.
     *
     * @remarks
     * This method is called automatically from inside the {@link ShaderUniform}
     *
     * When loading textures from url or html image/video elements
     * the texture data might not be available right away because the
     * resources may still be downloading.
     *
     * A call to this method instructs the texture to check the
     * download state of the resources and when available to update
     * the texture data. When data has arrived the {@link Texture.ready}
     * property will be set to `true`
     */
    update(): boolean;
    private updateCubemap;
    private updateSource;
}
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