using UnityEngine;

namespace Artngame.SKYMASTER
{
	public abstract class EffectBase : MonoBehaviour
	{
		public void EnsureArray<T>(ref T[] array, int size, T initialValue = default(T))
		{
			if (array == null || array.Length != size)
			{
				array = new T[size];
				for (int i = 0; i != size; i++)
				{
					array[i] = initialValue;
				}
			}
		}

		public void EnsureArray<T>(ref T[,] array, int size0, int size1, T defaultValue = default(T))
		{
			if (array != null && array.Length == size0 * size1)
			{
				return;
			}
			array = new T[size0, size1];
			for (int i = 0; i != size0; i++)
			{
				for (int j = 0; j != size1; j++)
				{
					array[i, j] = defaultValue;
				}
			}
		}

		public void EnsureMaterial(ref Material material, Shader shader)
		{
			if (shader != null)
			{
				if (material == null || material.shader != shader)
				{
					material = new Material(shader);
				}
				if (material != null)
				{
					material.hideFlags = HideFlags.DontSave;
				}
			}
			else
			{
				Debug.LogWarning("missing shader", this);
			}
		}

		public void EnsureDepthTexture(Camera camera)
		{
			if ((camera.depthTextureMode & DepthTextureMode.Depth) == 0)
			{
				camera.depthTextureMode |= DepthTextureMode.Depth;
			}
		}

		public void EnsureKeyword(Material material, string name, bool enabled)
		{
			if (enabled != material.IsKeywordEnabled(name))
			{
				if (enabled)
				{
					material.EnableKeyword(name);
				}
				else
				{
					material.DisableKeyword(name);
				}
			}
		}

		public bool EnsureRenderTarget(ref RenderTexture rt, int width, int height, RenderTextureFormat format, FilterMode filterMode, int depthBits = 0, int antiAliasing = 1)
		{
			if (rt != null && (rt.width != width || rt.height != height || rt.format != format || rt.filterMode != filterMode || rt.antiAliasing != antiAliasing))
			{
				RenderTexture.ReleaseTemporary(rt);
				rt = null;
			}
			if (rt == null)
			{
				rt = RenderTexture.GetTemporary(width, height, depthBits, format, RenderTextureReadWrite.Default, antiAliasing);
				rt.filterMode = filterMode;
				rt.wrapMode = TextureWrapMode.Clamp;
				return true;
			}
			return false;
		}

		public void ReleaseRenderTarget(ref RenderTexture rt)
		{
			if (rt != null)
			{
				RenderTexture.ReleaseTemporary(rt);
				rt = null;
			}
		}

		public void DrawFullscreenQuad()
		{
			GL.PushMatrix();
			GL.LoadOrtho();
			GL.Begin(7);
			GL.MultiTexCoord2(0, 0f, 0f);
			GL.Vertex3(0f, 0f, 0f);
			GL.MultiTexCoord2(0, 1f, 0f);
			GL.Vertex3(1f, 0f, 0f);
			GL.MultiTexCoord2(0, 1f, 1f);
			GL.Vertex3(1f, 1f, 0f);
			GL.MultiTexCoord2(0, 0f, 1f);
			GL.Vertex3(0f, 1f, 0f);
			GL.End();
			GL.PopMatrix();
		}
	}
}