import { SamplerStateParams, TextureUnitState } from '../../states';
import { DeviceGL } from '../DeviceGL';
import { SamplerStateGL } from './SamplerStateGL';
/**
 * @public
 */
export declare class TextureUnitStateGL extends TextureUnitState {
    /**
     * Gets the id of a texture unit by its index
     */
    static textureUnitId(textureUnitIndex: number): number;
    /**
     * Gets the texture unit id
     */
    get unit(): number;
    /**
     * The graphics device
     */
    readonly device: DeviceGL;
    /**
     * The sampler state object
     */
    readonly sampler: SamplerStateGL;
    /**
     * Gets the 0-based texture unit index
     */
    readonly index: number;
    constructor(device: DeviceGL, index: number);
    /**
     * Activates this texture unit
     */
    activate(): this;
    /**
     * Assigns and commits the sampler state and current texture to this texture unit
     *
     * @remarks
     * The given sampler state will be ignored if the current texture provides
     * own sampler state.
     *
     * If current texture is not power of two the sampler state params will be
     * automatically adjusted so webgl engine does not raise errors.
     *
     * @param samplerParams - The sampler state to assign
     */
    commit(samplerParams?: SamplerStateParams): this;
}
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