import { ShaderMaterial, Texture } from 'three';
import { IUniform } from './types';
/**
 * Uniforms interface for blur material shader.
 *
 * Defines the uniform variables that control blur rendering parameters.
 *
 * Check http://john-chapman-graphics.blogspot.co.at/2013/01/ssao-tutorial.html
 */
export interface IBlurMaterialUniforms {
    /**
     * Generic uniform property accessor.
     * @param name - The name of the uniform property
     */
    [name: string]: IUniform<any>;
    /**
     * Screen width in pixels.
     * Used to calculate blur kernel size and sampling coordinates.
     */
    screenWidth: IUniform<number>;
    /**
     * Screen height in pixels.
     * Used to calculate blur kernel size and sampling coordinates.
     */
    screenHeight: IUniform<number>;
    /**
     * Input texture to be blurred.
     * Can be null if no texture is currently bound.
     */
    map: IUniform<Texture | null>;
}
/**
 * Represents a custom shader material for applying a blur effect.
 *
 * Extends the base ShaderMaterial class and sets up the required shaders and uniforms.
 *
 * This material uses custom vertex and fragment shaders for blurring.
 */
export declare class BlurMaterial extends ShaderMaterial {
    /**
     * The GLSL source code for the vertex shader.
     */
    vertexShader: any;
    /**
     * The GLSL source code for the fragment shader.
     */
    fragmentShader: any;
    /**
     * The set of uniforms used by the blur shader.
     *
     * @property screenWidth - The width of the screen, used for blur calculations.
     * @property screenHeight - The height of the screen, used for blur calculations.
     * @property map - The texture to which the blur effect will be applied.
     */
    uniforms: IBlurMaterialUniforms;
}