using System.Collections;
using System.Collections.Generic;
using UC;
using UnityEngine;

[ExecuteInEditMode]
[RequireComponent(typeof(Camera))]
public class PrettySkin : MonoBehaviour {

    [AutoUI]
    [SerializeField]
    [Range(0.001f,1)]
    private float Bsigma;

    [AutoUI]
    [SerializeField]
    [Range(0, 15)]
    private float Sigma;

    [AutoUI]
    [SerializeField]
    [Range(0,3)]
    private float log;

    [AutoUI]
    [SerializeField]
    [Range(0,1)]
    private float smoothDegree;
    
    
    [SerializeField]
    private Shader m_PrettyShader;
    public Shader PrettyShader
    {
        get
        {
            if (m_PrettyShader == null)
                m_PrettyShader = Shader.Find("Unlit/PrettySkin 2.0");

            return m_PrettyShader;
        }
    }
    [SerializeField]
    private Material m_PrettyMaterial;
    public Material PrettyMaterial
    {
        get
        {
            if (m_PrettyMaterial == null)
                m_PrettyMaterial = ImageEffectHelper.CheckShaderAndCreateMaterial(PrettyShader);

            return m_PrettyMaterial;
        }
    }

    private void OnEnable()
    {
        GetComponent<Camera>().depthTextureMode = DepthTextureMode.DepthNormals;
    }

    private void OnDisable()
    {

    }

    private void DestroyMaterial(Material mat)
    {
        if (mat != null)
            DestroyImmediate(mat);
        mat = null;
    }

    private void OnRenderImage(RenderTexture source, RenderTexture destination)
    {
        RenderTexture rt1 = RenderTexture.GetTemporary(source.width, source.height);
        RenderTexture rt2 = RenderTexture.GetTemporary(source.width, source.height);
        PrettyMaterial.SetFloat("_BSIGMA", Bsigma);
        PrettyMaterial.SetFloat("_SIGMA", Sigma);
        Graphics.Blit(source, rt1, PrettyMaterial, 0);
        Graphics.Blit(source, rt2, PrettyMaterial, 1);
        PrettyMaterial.SetFloat("_smoothDegree", smoothDegree);
        PrettyMaterial.SetFloat("_Log", log);
        PrettyMaterial.SetTexture("_Bilateral",rt1);
        PrettyMaterial.SetTexture("_Canny", rt2);

        Graphics.Blit(source, destination, PrettyMaterial, 2);

        RenderTexture.ReleaseTemporary(rt1);
        RenderTexture.ReleaseTemporary(rt2);
    }
}