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


namespace BF
{
	[ExecuteInEditMode]
	public class UVAnimationGraphic : MaskableGraphic
	{
		#region 属性

		//默认shader
		private const string _defaultShader = "Hidden/UI/Emoji";

		//材质
		private Material _defaultMater = null;

		//sprite
		private Sprite _mainSprite;

		public Sprite MainSprite
		{
			get { return _mainSprite; }
			set
			{
				_mainSprite = value;
				SetAllDirty();
			}
		}

		//列数  帧数
		private int _cellAmount = 1;

		public int CellAmount
		{
			get { return _cellAmount; }
			set { _cellAmount = value; }
		}

		//播放速度
		private float _speed;

		public float Speed
		{
			get { return _speed; }
			set { _speed = value; }
		}

		//override
		public override Texture mainTexture
		{
			get
			{
				if (_mainSprite == null)
					return base.mainTexture;
				else
					return _mainSprite.texture;
			}

		}

		public override Material material
		{
			get
			{
				if (_defaultMater == null)
				{
					_defaultMater = new Material(Shader.Find(_defaultShader));
					_defaultMater.EnableKeyword("EMOJI_ANIMATION");
					_defaultMater.SetFloat("_CellAmount", _cellAmount);
					_defaultMater.SetFloat("_Speed", _speed);
				}

				return _defaultMater;
			}
		}

		#endregion

		protected override void OnPopulateMesh(VertexHelper vh)
		{
			vh.Clear();
		}
	}
}