using System;
using UnityEngine;

public class ScreenLoading : PostEffectsBase
{
	public override bool CheckResources()
	{
		this.CheckSupport(false);
		this.overlayMaterial = this.CheckShaderAndCreateMaterial(this.overlayShader, this.overlayMaterial);
		if (!this.isSupported)
		{
			this.ReportAutoDisable();
		}
		return this.isSupported;
	}

	private void OnRenderImage(RenderTexture source, RenderTexture destination)
	{
		if (!this.CheckResources())
		{
			Graphics.Blit(source, destination);
			return;
		}
		Vector4 value = new Vector4(1f, 0f, 0f, 1f);
		this.overlayMaterial.SetVector("_UV_Transform", value);
		this.overlayMaterial.SetFloat("_Intensity", this.intensity);
		this.overlayMaterial.SetTexture("_Overlay", this.texture);
		Graphics.Blit(source, destination, this.overlayMaterial, (int)this.blendMode);
	}

	public ScreenLoading.OverlayBlendMode blendMode = ScreenLoading.OverlayBlendMode.Overlay;

	public float intensity = 1f;

	public Texture2D texture;

	public Shader overlayShader;

	private Material overlayMaterial;

	public enum OverlayBlendMode
	{
		Additive,
		ScreenBlend,
		Multiply,
		Overlay,
		AlphaBlend
	}
}