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

namespace RenderHeads.Media.AVProVideo
{
	[AddComponentMenu("AVPro Video/Display uGUI")]
	public class DisplayUGUI : MaskableGraphic
	{
		[SerializeField]
		public MediaPlayer _mediaPlayer;

		[SerializeField]
		public Rect m_UVRect = new Rect(0f, 0f, 1f, 1f);

		[SerializeField]
		public bool _setNativeSize;

		[SerializeField]
		public bool _keepAspectRatio = true;

		[SerializeField]
		public bool _noDefaultDisplay = true;

		[SerializeField]
		public Texture _defaultTexture;

		private int _lastWidth;

		private int _lastHeight;

		private bool _flipY;

		private Texture _lastTexture;

		private static int _propAlphaPack;

		private static int _propVertScale;

		public override Texture mainTexture
		{
			get
			{
				Texture result = Texture2D.whiteTexture;
				if (HasValidTexture())
				{
					result = _mediaPlayer.TextureProducer.GetTexture();
				}
				else if (_noDefaultDisplay)
				{
					result = null;
				}
				else if (_defaultTexture != null)
				{
					result = _defaultTexture;
				}
				return result;
			}
		}

		public MediaPlayer CurrentMediaPlayer
		{
			get
			{
				return _mediaPlayer;
			}
			set
			{
				if (_mediaPlayer != value)
				{
					_mediaPlayer = value;
					SetMaterialDirty();
				}
			}
		}

		public Rect uvRect
		{
			get
			{
				return m_UVRect;
			}
			set
			{
				if (!(m_UVRect == value))
				{
					m_UVRect = value;
					SetVerticesDirty();
				}
			}
		}

		protected override void Awake()
		{
			if (_propAlphaPack == 0)
			{
				_propAlphaPack = Shader.PropertyToID("AlphaPack");
				_propVertScale = Shader.PropertyToID("_VertScale");
			}
			base.Awake();
		}

		public bool HasValidTexture()
		{
			return _mediaPlayer != null && _mediaPlayer.TextureProducer != null && _mediaPlayer.TextureProducer.GetTexture() != null;
		}

		private void LateUpdate()
		{
			if (_setNativeSize)
			{
				SetNativeSize();
			}
			if (_lastTexture != mainTexture)
			{
				_lastTexture = mainTexture;
				SetVerticesDirty();
			}
			if (HasValidTexture() && mainTexture != null && (mainTexture.width != _lastWidth || mainTexture.height != _lastHeight))
			{
				_lastWidth = mainTexture.width;
				_lastHeight = mainTexture.height;
				SetVerticesDirty();
			}
			if (material != null && _mediaPlayer != null && material.HasProperty(_propAlphaPack))
			{
				Helper.SetupAlphaPackedMaterial(material, _mediaPlayer.m_AlphaPacking);
				if (_flipY)
				{
					material.SetFloat(_propVertScale, -1f);
				}
				else
				{
					material.SetFloat(_propVertScale, 1f);
				}
			}
			SetMaterialDirty();
		}

		[ContextMenu("Set Native Size")]
		public override void SetNativeSize()
		{
			Texture texture = mainTexture;
			if (!(texture != null))
			{
				return;
			}
			int num = Mathf.RoundToInt((float)texture.width * uvRect.width);
			int num2 = Mathf.RoundToInt((float)texture.height * uvRect.height);
			if (_mediaPlayer != null)
			{
				if (_mediaPlayer.m_AlphaPacking == AlphaPacking.LeftRight)
				{
					num /= 2;
				}
				else if (_mediaPlayer.m_AlphaPacking == AlphaPacking.TopBottom)
				{
					num2 /= 2;
				}
			}
			base.rectTransform.anchorMax = base.rectTransform.anchorMin;
			base.rectTransform.sizeDelta = new Vector2(num, num2);
		}

		protected override void OnPopulateMesh(VertexHelper vh)
		{
			vh.Clear();
			List<UIVertex> list = new List<UIVertex>();
			_OnFillVBO(list);
			List<int> indices = new List<int>(new int[6] { 0, 1, 2, 2, 3, 0 });
			vh.AddUIVertexStream(list, indices);
		}

		[Obsolete("This method is not called from Unity 5.2 and above")]
		protected override void OnFillVBO(List<UIVertex> vbo)
		{
			_OnFillVBO(vbo);
		}

		private void _OnFillVBO(List<UIVertex> vbo)
		{
			_flipY = false;
			if (HasValidTexture())
			{
				_flipY = _mediaPlayer.TextureProducer.RequiresVerticalFlip();
			}
			Vector4 drawingDimensions = GetDrawingDimensions(_keepAspectRatio);
			vbo.Clear();
			UIVertex simpleVert = UIVertex.simpleVert;
			simpleVert.position = new Vector2(drawingDimensions.x, drawingDimensions.y);
			simpleVert.uv0 = new Vector2(m_UVRect.xMin, m_UVRect.yMin);
			if (_flipY)
			{
				simpleVert.uv0 = new Vector2(m_UVRect.xMin, 1f - m_UVRect.yMin);
			}
			simpleVert.color = base.color;
			vbo.Add(simpleVert);
			simpleVert.position = new Vector2(drawingDimensions.x, drawingDimensions.w);
			simpleVert.uv0 = new Vector2(m_UVRect.xMin, m_UVRect.yMax);
			if (_flipY)
			{
				simpleVert.uv0 = new Vector2(m_UVRect.xMin, 1f - m_UVRect.yMax);
			}
			simpleVert.color = base.color;
			vbo.Add(simpleVert);
			simpleVert.position = new Vector2(drawingDimensions.z, drawingDimensions.w);
			simpleVert.uv0 = new Vector2(m_UVRect.xMax, m_UVRect.yMax);
			if (_flipY)
			{
				simpleVert.uv0 = new Vector2(m_UVRect.xMax, 1f - m_UVRect.yMax);
			}
			simpleVert.color = base.color;
			vbo.Add(simpleVert);
			simpleVert.position = new Vector2(drawingDimensions.z, drawingDimensions.y);
			simpleVert.uv0 = new Vector2(m_UVRect.xMax, m_UVRect.yMin);
			if (_flipY)
			{
				simpleVert.uv0 = new Vector2(m_UVRect.xMax, 1f - m_UVRect.yMin);
			}
			simpleVert.color = base.color;
			vbo.Add(simpleVert);
		}

		private Vector4 GetDrawingDimensions(bool shouldPreserveAspect)
		{
			Vector4 result = Vector4.zero;
			if (mainTexture != null)
			{
				Vector4 zero = Vector4.zero;
				Vector2 vector = new Vector2(mainTexture.width, mainTexture.height);
				if (_mediaPlayer != null)
				{
					if (_mediaPlayer.m_AlphaPacking == AlphaPacking.LeftRight)
					{
						vector.x /= 2f;
					}
					else if (_mediaPlayer.m_AlphaPacking == AlphaPacking.TopBottom)
					{
						vector.y /= 2f;
					}
				}
				Rect pixelAdjustedRect = GetPixelAdjustedRect();
				int num = Mathf.RoundToInt(vector.x);
				int num2 = Mathf.RoundToInt(vector.y);
				Vector4 vector2 = new Vector4(zero.x / (float)num, zero.y / (float)num2, ((float)num - zero.z) / (float)num, ((float)num2 - zero.w) / (float)num2);
				if (shouldPreserveAspect && vector.sqrMagnitude > 0f)
				{
					float num3 = vector.x / vector.y;
					float num4 = pixelAdjustedRect.width / pixelAdjustedRect.height;
					if (num3 > num4)
					{
						float height = pixelAdjustedRect.height;
						pixelAdjustedRect.height = pixelAdjustedRect.width * (1f / num3);
						pixelAdjustedRect.y += (height - pixelAdjustedRect.height) * base.rectTransform.pivot.y;
					}
					else
					{
						float width = pixelAdjustedRect.width;
						pixelAdjustedRect.width = pixelAdjustedRect.height * num3;
						pixelAdjustedRect.x += (width - pixelAdjustedRect.width) * base.rectTransform.pivot.x;
					}
				}
				result = new Vector4(pixelAdjustedRect.x + pixelAdjustedRect.width * vector2.x, pixelAdjustedRect.y + pixelAdjustedRect.height * vector2.y, pixelAdjustedRect.x + pixelAdjustedRect.width * vector2.z, pixelAdjustedRect.y + pixelAdjustedRect.height * vector2.w);
			}
			return result;
		}
	}
}