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

public class ScreenEffect : MonoBehaviour
{
    [Range(0f, 4f)]
    public float brightness = 1.0f;
    [Range(0f, 4f)]
    public float saturation = 1.0f;
    [Range(0f, 4f)]
    public float contrast = 1.0f;
    private Material material;

    private void Start()
    {
        material = new Material(Shader.Find("MyShader/BrightnessSaturationContrast"));
        material.hideFlags = HideFlags.DontSave;
    }

    void OnRenderImage(RenderTexture src, RenderTexture dest)
    {
        if (material != null)
        {
            material.SetFloat("_Brightness", brightness); // 设置亮度
            material.SetFloat("_Saturation", saturation); // 设置饱和度
            material.SetFloat("_Contrast", contrast); // 设置对比度
            Graphics.Blit(src, dest, material);
        }
        else
        {
            Graphics.Blit(src, dest);
        }
    }
}