using UnityEngine;

namespace Es.InkPainter.Effective
{
	public static class ReverseUV
	{
		private const string REVERSE_UV_MATERIAL = "Es.InkPainter.Effective.ReverseUV";

		private const string REVERSE_X = "_ReverseX";

		private const string REVERSE_Y = "_ReverseY";

		private const float DEFAULT = 1f;

		private const float REVERSE = 0f;

		private static Material reverseUVMaterial;

		public static void Horizontal(Texture src, RenderTexture dst)
		{
			if (reverseUVMaterial == null)
			{
				InitReverseUVMaterial();
			}
			SetReverseUVProperty(0f, 1f);
			Blit(src, dst);
		}

		public static void Vertical(Texture src, RenderTexture dst)
		{
			if (reverseUVMaterial == null)
			{
				InitReverseUVMaterial();
			}
			SetReverseUVProperty(1f, 0f);
			Blit(src, dst);
		}

		public static void HorizontalAndVertical(Texture src, RenderTexture dst)
		{
			if (reverseUVMaterial == null)
			{
				InitReverseUVMaterial();
			}
			SetReverseUVProperty(0f, 0f);
			Blit(src, dst);
		}

		private static void InitReverseUVMaterial()
		{
			reverseUVMaterial = new Material(Resources.Load<Material>("Es.InkPainter.Effective.ReverseUV"));
		}

		private static void SetReverseUVProperty(float x, float y)
		{
			reverseUVMaterial.SetFloat("_ReverseX", x);
			reverseUVMaterial.SetFloat("_ReverseY", y);
		}

		private static void Blit(Texture src, RenderTexture dst)
		{
			RenderTexture temporary = RenderTexture.GetTemporary(src.width, src.height, 0);
			Graphics.Blit(src, temporary, reverseUVMaterial);
			Graphics.Blit(temporary, dst);
			RenderTexture.ReleaseTemporary(temporary);
		}
	}
}