import {
  Uniform,
  Vector2,
	Material
} from '../../../src/Three';

export const DepthLimitedBlurShader: {
  defines: {
    KERNEL_RADIUS: number;
    DEPTH_PACKING: number;
    PERSPECTIVE_CAMERA: number;
  };
  uniforms: {
    tDiffuse: Uniform;
    size: Uniform;
    sampleUvOffsets: Uniform;
    sampleWeights: Uniform;
    tDepth: Uniform;
    cameraNear: Uniform;
    cameraFar: Uniform;
    depthCutoff: Uniform;
  };
  vertexShader: string;
  fragmentShader: string;
};

export interface BlurShaderUtils {
  createSampleWeights(kernelRadius: number, stdDev: number): number[];
  createSampleOffsets(kernelRadius: number, uvIncrement: Vector2): Vector2[];
  configure(configure: Material, kernelRadius: number, stdDev: number, uvIncrement: Vector2): void;
}