namespace AtlasUtility
{
    using UnityEditor;
    using UnityEngine;

    using System;
    using System.IO;
    using System.Linq;
    using System.Text;
    using System.Reflection;
    using System.Collections.Generic;

    using Random = UnityEngine.Random;

    public class AtlasUtilityWindow : EditorWindow
    {
        protected class Parameter
        {
            public int Padding;
            public int AtlasSize;
            public float ScaleFactor;
            public string Path;
            public List<string> Pathes;
            public PackPlan PackPlan;
            public Texture2D Atlas;
            public Texture2D EditorTexture;
            public List<Texture2D> EditorTextures;
            public ScalePlatform ScalePlatform;
            public List<Texture2D> TextureList;
            public List<VirtualTexture> VirtualTextureList;
        }

        protected class TextureInfo
        {
            #region Variable

            public int Max
            {
                get
                {
                    if (Width > Height)
                    {
                        return Width;
                    }
                    else
                    {
                        return Height;
                    }
                }
            }
            public int Area
            {
                get { return Width * Height; }
            }
            public string Name
            {
                get { return Texture.name; }
            }

            public Rect Rect
            {
                get { return new Rect(LowerLeft.x + Padding, LowerLeft.y + Padding, Width - 2 * Padding, Height - 2 * Padding); }
            }
            public Vector2 LowerLeft;
            public Vector2 UpperLeft
            {
                get { return LowerLeft + new Vector2(0, Height); }
            }
            public Vector2 LowerRight
            {
                get { return LowerLeft + new Vector2(Width, 0); }
            }
            public Vector2 UpperRight
            {
                get { return LowerLeft + new Vector2(Width, Height); }
            }

            public Color[] Colors;
            public Vector4 Pivot;
            public Vector4 Border;

            public int Width;
            public int Height;
            public int RawWidth;
            public int RawHeight;
            public int Padding;
            public string GUID;

            public Texture2D Texture;

            #endregion

            public TextureInfo(int padding, Texture2D texture2D)
            {
                Texture = texture2D;

                string assetPath = AssetDatabase.GetAssetPath(texture2D);

                TextureImporter textureImporter = (TextureImporter)AssetImporter.GetAtPath(assetPath);

                Pivot = textureImporter.spritePivot;
                Border = textureImporter.spriteBorder;
                GUID = AssetDatabase.AssetPathToGUID(assetPath);

                RawWidth = Texture.width;
                RawHeight = Texture.height;

                object[] args = new object[2];

                MethodInfo methodInfo = typeof(TextureImporter).GetMethod("GetWidthAndHeight", BindingFlags.NonPublic | BindingFlags.Instance);

                methodInfo.Invoke(textureImporter, args);

                int originWidth = (int)args[0];
                int originHeight = (int)args[1];

                if (RawWidth < originWidth || RawHeight < originHeight)
                {
                    Debug.LogWarning($"注意 {texture2D.name} 将被缩小");
                }

                if (!textureImporter.isReadable)
                {
                    textureImporter.isReadable = true;

                    textureImporter.SaveAndReimport();
                }

                Colors = texture2D.GetPixels(0, 0, RawWidth, RawHeight);


                Width = RawWidth + padding * 2;
                Height = RawHeight + padding * 2;
                Padding = padding;
            }

            public TextureInfo(int padding, Texture2D texture2D, int width, int height)
            {
                Width = width + padding * 2;
                Height = height + padding * 2;
                Padding = padding;
                Texture = texture2D;
            }
        }

        protected class Box
        {
            #region MyRegion

            public bool Valid
            {
                get
                {
                    if (Width > 0 && Height > 0)
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
            }

            public Vector2 LowerLeft;
            public Vector2 UpperLeft
            {
                get { return LowerLeft + new Vector2(0, Height); }
            }
            public Vector2 LowerRight
            {
                get { return LowerLeft + new Vector2(Width, 0); }
            }
            public Vector2 UpperRight
            {
                get { return LowerLeft + new Vector2(Width, Height); }
            }

            public int Width;
            public int Height;

            #endregion

            public Box(int width, int height, Vector2 lowerLeft)
            {
                Width = width;
                Height = height;
                LowerLeft = lowerLeft;
            }


            public bool CanFill(TextureInfo textureInfo)
            {
                return textureInfo.Width <= Width && textureInfo.Height <= Height;
            }
        }

        protected class JagBox
        {
            protected class Pair
            {
                public int Low;
                public int High;

                public Pair(int low, int high)
                {
                    Low = low;
                    High = high;
                }
            }

            #region Variable

            public bool Valid
            {
                get
                {
                    if (BoxList.Count == 0)
                    {
                        return false;
                    }
                    else
                    {
                        return true;
                    }
                }
            }

            public int Width
            {
                get { return (int)BoxList.MySum(box => box.Width); }
            }

            public Vector2 UpperRight;

            public List<Box> BoxList;

            protected Dictionary<Pair, Pair> XCoordDic;
            protected Dictionary<Pair, Pair> YCoordDic;

            #endregion

            public JagBox(List<Box> boxList)
            {
                BoxList = boxList;

                if (boxList.Count == 0)
                {
                    return;
                }

                UpperRight = boxList.Back(0).UpperRight;

                XCoordDic = new Dictionary<Pair, Pair>();
                YCoordDic = new Dictionary<Pair, Pair>();

                for (int i = 0; i < boxList.Count; i++)
                {
                    Pair xPair = new Pair((int) boxList[i].LowerLeft.x, (int) boxList[i].LowerRight.x);
                    Pair yPair = new Pair((int) boxList[i].LowerLeft.y, (int) boxList[i].UpperRight.y);

                    XCoordDic.Add(yPair, xPair);
                    YCoordDic.Add(xPair, yPair);
                }
            }


            public bool CanFill(TextureInfo textureInfo, ref int startIndex, ref int endIndex)
            {
                if (textureInfo.Width > Width)
                {
                    return false;
                }

                endIndex = BoxList.Count - 1;
                startIndex = GetStartIndex(textureInfo.Width);

                reLoop: 
                for (int i = startIndex; i <= endIndex; i++)
                {
                    if (BoxList[i].Height < textureInfo.Height)
                    {
                        if (startIndex > 0)
                        {
                            startIndex--;
                            endIndex--;

                            goto reLoop;
                        }
                        else
                        {
                            return false;
                        }
                    }
                }

                return true;
            }

            protected int GetStartIndex(int fillWidth)
            {
                int x = (int)UpperRight.x - fillWidth;

                List<Pair> xPairList = YCoordDic.Keys.ToList();

                for (int i = xPairList.Count - 1; i >= 0; i--)
                {
                    if (xPairList[i].Low <= x && x <= xPairList[i].High)
                    {
                        return i;
                    }
                }

                throw new Exception("遇到一个Bug");
            }

            public List<JagBox> Fill(TextureInfo textureInfo, int startIndex, int endIndex)
            {
                textureInfo.LowerLeft = BoxList[endIndex].UpperRight + new Vector2(-textureInfo.Width, -textureInfo.Height);


                int fillWidth = textureInfo.Width;
                int fillHeight = textureInfo.Height;

                Box newLeftBox;
                Box newDownBox;

                List<Box> leftBoxList = new List<Box>();
                List<Box> downBoxList = new List<Box>();

                if (fillWidth > fillHeight)
                {
                    VerticalSlice(startIndex, endIndex, fillWidth, fillHeight, out newLeftBox, out newDownBox);
                }
                else
                {
                    HorizontalSlice(startIndex, endIndex, fillWidth, fillHeight, out newLeftBox, out newDownBox);
                }

                for (int i = 0; i < startIndex; i++)
                {
                    leftBoxList.Add(BoxList[i]);
                }

                if (newLeftBox.Valid)
                {
                    leftBoxList.Add(newLeftBox);
                }

                if (newDownBox.Valid)
                {
                    downBoxList.Add(newDownBox);
                }

                for (int i = startIndex + 1; i < endIndex; i++)
                {
                    downBoxList.Add(new Box(BoxList[i].Width, BoxList[i].Height - fillHeight, BoxList[i].LowerLeft));
                }


                JagBox leftJagBox = new JagBox(leftBoxList);
                JagBox downJagBox = new JagBox(downBoxList);

                List<JagBox> jagBoxList = new List<JagBox>();

                if (downJagBox.Valid)
                {
                    jagBoxList.Add(downJagBox);
                }

                if (leftJagBox.Valid)
                {
                    jagBoxList.Add(leftJagBox);
                }

                return jagBoxList;
            }

            protected void VerticalSlice(int startIndex, int endIndex, int fillWidth, int fillHeight, out Box newLeftBox, out Box newDownBox)
            {
                Box endBox = BoxList[endIndex];
                Box startBox = BoxList[startIndex];

                int relativeFillWidth = (int) (fillWidth - (endBox.UpperRight.x - startBox.UpperRight.x));


                int leftBoxWidth = startBox.Width - relativeFillWidth;
                int leftBoxHeight = startBox.Height;
                Vector2 leftBoxLowerLeft = startBox.LowerLeft;

                newLeftBox = new Box(leftBoxWidth, leftBoxHeight, leftBoxLowerLeft);

                int downBoxWidth = relativeFillWidth;
                int downBoxHeight = startBox.Height - fillHeight;
                Vector2 downBoxLowerLeft = startBox.LowerLeft + new Vector2(startBox.Width - relativeFillWidth, 0);

                newDownBox = new Box(downBoxWidth, downBoxHeight, downBoxLowerLeft);
            }

            protected void HorizontalSlice(int startIndex, int endIndex, int fillWidth, int fillHeight, out Box newLeftBox, out Box newDownBox)
            {
                Box endBox = BoxList[endIndex];
                Box startBox = BoxList[startIndex];

                int relativeFillWidth = (int)(fillWidth - (endBox.UpperRight.x - startBox.UpperRight.x));


                int leftBoxWidth = startBox.Width - relativeFillWidth;
                int leftBoxHeight = fillHeight;
                Vector2 leftBoxLowerLeft = startBox.LowerLeft + new Vector2(0, startBox.Height - fillHeight);

                newLeftBox = new Box(leftBoxWidth, leftBoxHeight, leftBoxLowerLeft);

                int downBoxWidth = startBox.Width;
                int downBoxHeight = startBox.Height - fillHeight;
                Vector2 downBoxLowerLeft = startBox.LowerLeft;

                newDownBox = new Box(downBoxWidth, downBoxHeight, downBoxLowerLeft);
            }
        }

        protected class Atlas
        {
            #region Variable

            public int Width;
            public int Height;
            public string AssetBundleName;
            public string AssetBundleVariant;
            public List<TextureInfo> TextureInfoList;

            #endregion

            public void Create(int index, Parameter parameter)
            {
                SpriteMetaData[] spriteMetaDatas = new SpriteMetaData[TextureInfoList.Count];

                Color[] atlasColors = new Color[Width * Height];

                for (int i = 0; i < TextureInfoList.Count; i++)
                {
                    TextureInfo textureInfo = TextureInfoList[i];

                    Vector2 lowerLeft = textureInfo.LowerLeft + new Vector2(parameter.Padding, parameter.Padding);

                    spriteMetaDatas[i].rect = textureInfo.Rect;
                    spriteMetaDatas[i].pivot = textureInfo.Pivot;
                    spriteMetaDatas[i].name = textureInfo.Name;
                    spriteMetaDatas[i].border = textureInfo.Border;
                    spriteMetaDatas[i].alignment = (int)SpriteAlignment.Custom;

                    for (int j = 0; j < textureInfo.RawHeight; j++)
                    {
                        for (int k = 0; k < textureInfo.RawWidth; k++)
                        {
                            int row = (int)lowerLeft.y + j;
                            int column = (int)lowerLeft.x + k;

                            atlasColors[row * Width + column] = textureInfo.Colors[j * textureInfo.RawWidth + k];
                        }
                    }
                }

                string path = index == 0 ? parameter.Path + ".png" : $"{parameter.Path} ({index}).png";

                if (File.Exists(path))
                {
                    TextureImporter importer = (TextureImporter)AssetImporter.GetAtPath(path);

                    AssetBundleName = importer.assetBundleName;
                    AssetBundleVariant = importer.assetBundleVariant;

                    AssetDatabase.DeleteAsset(path);

                    AssetDatabase.Refresh();
                }

                Texture2D texture2D = new Texture2D(Width, Height, TextureFormat.RGBA32, false);

                texture2D.SetPixels(atlasColors);

                texture2D.Apply();

                File.WriteAllBytes(path, texture2D.EncodeToPNG());

                AssetDatabase.ImportAsset(path);


                TextureImporter textureImporter = (TextureImporter)AssetImporter.GetAtPath(path);

                if (!string.IsNullOrEmpty(AssetBundleName))
                {
                    textureImporter.assetBundleName = AssetBundleName;
                }

                if (!string.IsNullOrEmpty(AssetBundleVariant))
                {
                    textureImporter.assetBundleVariant = AssetBundleVariant;
                }

                textureImporter.spritesheet = spriteMetaDatas;
                textureImporter.maxTextureSize = Mathf.Max(Width, Height);
                textureImporter.isReadable = true;
                textureImporter.alphaIsTransparency = true;
                textureImporter.textureType = TextureImporterType.Sprite;
                textureImporter.spriteImportMode = SpriteImportMode.Multiple;

                textureImporter.SaveAndReimport();


                string atlasGUID = AssetDatabase.AssetPathToGUID(path);

                List<AtlasReferencePair> referencePairList = new List<AtlasReferencePair>();

                for (int i = 0; i < spriteMetaDatas.Length; i++)
                {
                    AtlasReference atlasReference = new AtlasReference((21300000 + i * 2).ToString(), atlasGUID);
                    AtlasReference sourceAtlasReference = new AtlasReference("21300000", TextureInfoList[i].GUID);

                    referencePairList.Add(new AtlasReferencePair(atlasReference, sourceAtlasReference));
                }

                AtlasReferenceTable.WriteAllLine(referencePairList, true);
            }
        }

        #region Variable

        protected AtlasUtility Instance;
        protected SerializedObject SerializedObject;

        protected Vector2 ScrollPosition;
        protected GUIStyle TitleGuiStyle;

        protected SerializedProperty PackSize;
        protected SerializedProperty packPlan;
        protected SerializedProperty PackPath;
        protected SerializedProperty PackAtlas;
        protected SerializedProperty PackName;
        protected SerializedProperty PackPadding;
        protected SerializedProperty TextureList;
        protected SerializedProperty VirtualTextureList;

        protected SerializedProperty SlicePath;
        protected SerializedProperty SliceAtlas;
        protected SerializedProperty SlicePadding;

        protected SerializedProperty SearchTarget;

        protected SerializedProperty PlatformSet;

        protected SerializedProperty ScalePadding;
        protected SerializedProperty ScaleFactor;
        protected SerializedProperty ScalePath;
        protected SerializedProperty ScaleName;
        protected SerializedProperty MobileTexture;
        protected SerializedProperty DesktopTexture;
        protected SerializedProperty EditorTexture;
        protected SerializedProperty LastEditorTexture;
        protected SerializedProperty EditorTextures;
        protected SerializedProperty ScalePlatform;

        #endregion

        [MenuItem("DashGame/AtlasUtility")]
        protected static void ShowWindow()
        {
            Type inspectorType = Type.GetType("UnityEditor.InspectorWindow,UnityEditor.dll");

            AtlasUtilityWindow window = GetWindow<AtlasUtilityWindow>(inspectorType);

            window.titleContent = new GUIContent("AtlasUtility");
            window.Show();
        }

        protected void OnEnable()
        {
            Instance = InstanceManager.SearchInstance<AtlasUtility>();
            SerializedObject = new SerializedObject(Instance);

            PackSize = SerializedObject.FindProperty("PackSize");

            PackPath = SerializedObject.FindProperty("PackPath");
            PackName = SerializedObject.FindProperty("PackName");

            SlicePath = SerializedObject.FindProperty("SlicePath");
            SlicePadding = SerializedObject.FindProperty("SlicePadding");

            PackAtlas = SerializedObject.FindProperty("PackAtlas");
            SearchTarget = SerializedObject.FindProperty("SearchTarget");
            TextureList = SerializedObject.FindProperty("TextureList");
            SliceAtlas = SerializedObject.FindProperty("SliceAtlas");
            PackPadding = SerializedObject.FindProperty("PackPadding");
            VirtualTextureList = SerializedObject.FindProperty("VirtualTextureList");

            packPlan = SerializedObject.FindProperty("PackPlan");

            PlatformSet = SerializedObject.FindProperty("PlatformSet");

            ScalePadding = SerializedObject.FindProperty("ScalePadding");
            ScaleFactor = SerializedObject.FindProperty("ScaleFactor");
            ScalePath = SerializedObject.FindProperty("ScalePath");
            ScaleName = SerializedObject.FindProperty("ScaleName");
            MobileTexture = SerializedObject.FindProperty("MobileTexture");
            DesktopTexture = SerializedObject.FindProperty("DesktopTexture");
            EditorTexture = SerializedObject.FindProperty("EditorTexture");
            EditorTextures = SerializedObject.FindProperty("EditorTextures");
            LastEditorTexture = SerializedObject.FindProperty("LastEditorTexture");
            ScalePlatform = SerializedObject.FindProperty("ScalePlatform");

            TitleGuiStyle = new GUIStyle
            {
                fontSize = 20,
                alignment = TextAnchor.MiddleCenter,
                normal = {textColor = new Color(0.75f, 0.75f, 0.75f, 1)}
            };
        }


        protected void Pack()
        {
            Parameter parameter = CreatePackParameter();

            List<TextureInfo> textureInfoList = CreateTextureInfoList(parameter);

            if (textureInfoList.Count == 0)
            {
                throw new Exception("没有可用的Texture");
            }

            EditorUtility.DisplayProgressBar("打包", "计算排列位置", 0.5f);

            List<Atlas> atlasList = new List<Atlas>();

            while (textureInfoList.Count > 0)
            {
                Box box = CreateBox(parameter, textureInfoList);

                textureInfoList = FillBox(parameter, box, textureInfoList, atlasList);
            }
            
            if (EditorUtility.DisplayDialog("打包", $"将新建{atlasList.Count}张图集", "继续", "取消"))
            {
                for (int i = 0; i < atlasList.Count; i++)
                {
                    EditorUtility.DisplayProgressBar("打包", "新建图集", (i + 1)/(float) atlasList.Count);

                    atlasList[i].Create(i, parameter);
                }
            }

            EndPack();
        }

        protected Parameter CreatePackParameter()
        {
            string directory = Instance.PackPath.TrimEnd('/', '\\') + "/";

            if (directory.Length < 6 || directory.Substring(0, 6).ToLower() != "assets")
            {
                throw new Exception("PackPath必须位置Assets目录内");
            }

            if (!Directory.Exists(directory))
            {
                throw new Exception("文件夹不存在");
            }

            if (string.IsNullOrEmpty(Instance.PackName) || Instance.PackName.Any(Path.GetInvalidFileNameChars().Contains))
            {
                throw new Exception("图集名字无效");
            }

            if (Instance.PackPadding < 0)
            {
                Instance.PackPadding = 0;
            }
            
            if (Instance.PackPlan == PackPlan.Fixed)
            {
                if (Instance.PackSize <= 2)
                {
                    throw new Exception("图集尺寸必须大于2");
                }

                if (!Mathf.IsPowerOfTwo(Instance.PackSize))
                {
                    throw new Exception("图集尺寸必须为2次幂");
                }
            }
            else if (Instance.PackPlan == PackPlan.Smallest)
            {
                if (Instance.PackSize <= 0)
                {
                    Instance.PackSize = 8192;
                }
                else
                {
                    Instance.PackSize = ExMath.PrevPOT(Instance.PackSize);
                }
            }

            for (int i = 0; i < Instance.TextureList.Count; i++)
            {
                for (int j = i+1; j < Instance.TextureList.Count; j++)
                {
                    if (Instance.TextureList[i].name == Instance.TextureList[j].name)
                    {
                        throw new Exception($"Sprite名字重复 {Instance.TextureList[i].name}");
                    }
                }
            }

            Parameter parameter = new Parameter
            {
                Path = directory + Instance.PackName,
                PackPlan = Instance.PackPlan,
                Padding = Instance.PackPadding,
                AtlasSize = Instance.PackSize,
                TextureList = Instance.TextureList,
                VirtualTextureList = Instance.VirtualTextureList
            };

            return parameter;
        }

        protected List<TextureInfo> CreateTextureInfoList(Parameter parameter)
        {
            List<TextureInfo> textureInfoList = new List<TextureInfo>();

            for (int i = 0; i < parameter.TextureList.Count; i++)
            {
                if (parameter.TextureList[i] != null)
                {
                    EditorUtility.DisplayProgressBar("打包", "读取Texture", (i + 1)/(float) parameter.TextureList.Count);

                    textureInfoList.Add(new TextureInfo(parameter.Padding, parameter.TextureList[i]));
                }
            }

            for (int i = 0; i < parameter.VirtualTextureList.Count; i++)
            {
                Texture2D texture = new Texture2D(parameter.VirtualTextureList[i].Width, parameter.VirtualTextureList[i].Height) {name = parameter.VirtualTextureList[i].Name};

                Color color = new Color(Random.Range(0f, 1f), Random.Range(0f, 1f), Random.Range(0f, 1f), Random.Range(0f, 1f));

                for (int j = 0; j < parameter.VirtualTextureList[i].Width; j++)
                {
                    for (int k = 0; k < parameter.VirtualTextureList[i].Height; k++)
                    {
                        texture.SetPixel(j, k, color);
                    }
                }

                texture.Apply();

                textureInfoList.Add(new TextureInfo(parameter.Padding, texture, parameter.VirtualTextureList[i].Width, parameter.VirtualTextureList[i].Height));
            }

            EditorUtility.ClearProgressBar();

            return textureInfoList;
        }

        protected Box CreateBox(Parameter parameter, List<TextureInfo> textureInfoList)
        {
            int maxTextureLength = (int) textureInfoList.MyMax(info => info.Max);

            if (maxTextureLength > parameter.AtlasSize)
            {
                EndPack();

                throw new Exception("一张Texture的宽或高大于了图集尺寸");
            }

            if (parameter.PackPlan == PackPlan.Fixed)
            {
                return new Box(parameter.AtlasSize, parameter.AtlasSize, new Vector2(0, 0));
            }
            else if (parameter.PackPlan == PackPlan.Smallest)
            {
                int totalArea = textureInfoList.Sum(debris => debris.Area);

                int length = ExMath.NextPOT(Mathf.CeilToInt(Mathf.Sqrt(totalArea)));

                length = Mathf.Max(length, maxTextureLength);

                length = Mathf.Min(length, parameter.AtlasSize);

                if (length* length/2f >= totalArea)
                {
                    return new Box(length, length/2, new Vector2(0, 0));
                }
                else
                {
                    return new Box(length, length, new Vector2(0, 0));
                }
            }
            else
            {
                throw new Exception();
            }
        }

        protected List<JagBox> CreateJagBox(List<Box> emptyBoxList)
        {
            if (emptyBoxList.Count == 0)
            {
                return new List<JagBox>(); ;
            }

            List<JagBox> jagBoxList = new List<JagBox>();

            reLoop :
            List<Box> boxList = new List<Box>() {emptyBoxList[0]};

            for (int i = 0; i < emptyBoxList.Count - 1; i++)
            {
                int x1 = (int)emptyBoxList[i].LowerRight.x;
                int x2 = (int)emptyBoxList[i + 1].LowerLeft.x;

                if (x1 == x2)
                {
                    boxList.Add(emptyBoxList[i + 1]);

                    emptyBoxList.RemoveAt(i--);
                }
                else
                {
                    jagBoxList.Add(new JagBox(boxList));
                    
                    goto reLoop;
                }
            }

            jagBoxList.Add(new JagBox(boxList));

            return jagBoxList;
        }

        protected List<TextureInfo> FillBox(Parameter parameter, Box box, List<TextureInfo> textureInfoList, List<Atlas> atlasList)
        {
            textureInfoList.MySort((info1, info2) => info1.Width < info2.Width);

            while (true)
            {
                List<Box> emptyBoxList = new List<Box>();
                List<TextureInfo> usedTextureInfoList = new List<TextureInfo>();
                List<TextureInfo> remainTexureInfoList = new List<TextureInfo>(textureInfoList);

                FillChildBox(box, remainTexureInfoList, usedTextureInfoList, emptyBoxList);

                List<JagBox> jagBoxList = CreateJagBox(emptyBoxList);

                remainTexureInfoList.MySort((info1, info2) => info1.Max < info2.Max);

                FillJagBox(jagBoxList, remainTexureInfoList, usedTextureInfoList);

                if (remainTexureInfoList.Count == 0)
                {
                    atlasList.Add(CreateAtlas(box, usedTextureInfoList));

                    return remainTexureInfoList;
                }
                else
                {
                    if (box.Width > box.Height)
                    {
                        box = new Box(box.Height, box.Width, Vector2.zero);
                    }
                    else if (box.Height > box.Width)
                    {
                        box = new Box(box.Height, box.Height, Vector2.zero);
                    }
                    else if (box.Width == box.Height)
                    {
                        int newLength = ExMath.NextPOT(box.Width + 1);

                        if (newLength > parameter.AtlasSize)
                        {
                            atlasList.Add(CreateAtlas(box, usedTextureInfoList));

                            return remainTexureInfoList;
                        }
                        else
                        {
                            box = new Box(newLength, newLength/2, Vector2.zero);
                        }
                    }
                }
            }
        }

        protected void FillChildBox(Box box, List<TextureInfo> remainTextureInfoList, List<TextureInfo> usedTextureInfoList, List<Box> emptyBoxList)
        {
            if (box.Valid)
            {
                for (int i = 0; i < remainTextureInfoList.Count; i++)
                {
                    if (box.CanFill(remainTextureInfoList[i]))
                    {
                        TextureInfo textureInfo = remainTextureInfoList[i];

                        textureInfo.LowerLeft = box.LowerLeft;

                        remainTextureInfoList.Remove(textureInfo);

                        usedTextureInfoList.Add(textureInfo);


                        Vector2 upChildBoxLowerLeft = box.LowerLeft + new Vector2(0, textureInfo.Height);
                        Vector2 rightChildBoxLowerLeft = box.LowerLeft + new Vector2(textureInfo.Width, 0);

                        Box upChildBox = new Box(textureInfo.Width, box.Height - textureInfo.Height, upChildBoxLowerLeft);
                        Box rightChildBox = new Box(box.Width - textureInfo.Width, box.Height, rightChildBoxLowerLeft);
                        
                        FillChildBox(upChildBox, remainTextureInfoList, usedTextureInfoList, emptyBoxList);
                        FillChildBox(rightChildBox, remainTextureInfoList, usedTextureInfoList, emptyBoxList);

                        return;
                    }
                }

                emptyBoxList.Add(box);
            }
        }

        protected void FillJagBox(List<JagBox> jagBoxList, List<TextureInfo> remainTextureInfoList, List<TextureInfo> usedTextureInfoList)
        {
            for (int i = 0; i < jagBoxList.Count; i++)
            {
                for (int j = 0; j < remainTextureInfoList.Count; j++)
                {
                    int startIndex = 0;
                    int endIndex = 0;

                    if (jagBoxList[i].CanFill(remainTextureInfoList[j], ref startIndex, ref endIndex))
                    {
                        jagBoxList.AddRange(jagBoxList[i].Fill(remainTextureInfoList[j], startIndex, endIndex));

                        usedTextureInfoList.Add(remainTextureInfoList[j]);

                        remainTextureInfoList.Remove(remainTextureInfoList[j]);

                        break;
                    }
                }
            }
        }

        protected Atlas CreateAtlas(Box box, List<TextureInfo> textureInfoList)
        {
            Atlas atlas = new Atlas
            {
                Width = box.Width,
                Height = box.Height,
                TextureInfoList = textureInfoList,
            };

            return atlas;
        }

        protected void EndPack()
        {
            EditorUtility.ClearProgressBar();
        }


        protected void CollectDebugInfo()
        {
            Parameter parameter = CreateDebugParameter();

            List<TextureInfo> textureInfoList = CreateTextureInfoList(parameter);

            if (textureInfoList.Count == 0)
            {
                throw new Exception("没有可用的Texture");
            }

            StringBuilder stringBuilder = new StringBuilder();

            for (int i = 0; i < textureInfoList.Count; i++)
            {
                stringBuilder.AppendLine($"Width:{textureInfoList[i].Width} Height:{textureInfoList[i].Height} Pivot:{textureInfoList[i].Pivot} Border:{textureInfoList[i].Border}");
            }
            
            StreamWriter streamWriter = new StreamWriter(parameter.Path);

            streamWriter.WriteLine(Application.unityVersion);

            streamWriter.Write(stringBuilder.ToString());

            streamWriter.Close();

            AssetDatabase.ImportAsset(parameter.Path);
        }

        protected Parameter CreateDebugParameter()
        {
            Parameter parameter = new Parameter
            {
                Path = "Assets/DebugInfo.txt".GetUnRepeatFileName(),
                TextureList = Instance.TextureList,
                VirtualTextureList = Instance.VirtualTextureList
            };

            return parameter;
        }


        protected void Slice()
        {
            Parameter parameter = CreateSliceParameter();

            string spriteSheetPath = AssetDatabase.GetAssetPath(parameter.Atlas);

            TextureImporter textureImporter = (TextureImporter)AssetImporter.GetAtPath(spriteSheetPath);

            if (textureImporter.spritesheet.Length == 0)
            {
                throw new Exception("该图片不是MultipleSprite");
            }

            if (!textureImporter.isReadable)
            {
                textureImporter.isReadable = true;
                textureImporter.SaveAndReimport();
            }

            for (int k = 0; k < textureImporter.spritesheet.Length; k++)
            {
                SpriteMetaData metaData = textureImporter.spritesheet[k];

                EditorUtility.DisplayProgressBar("切图", $"新建 {metaData.name}", (k + 1)/(float) textureImporter.spritesheet.Length);

                int width = (int)metaData.rect.width + 2 * parameter.Padding;
                int height = (int)metaData.rect.height + 2 * parameter.Padding;

                Texture2D texture2D = new Texture2D(width, height);

                Color[] originColors = parameter.Atlas.GetPixels((int)metaData.rect.x, (int)metaData.rect.y, (int)metaData.rect.width, (int)metaData.rect.height);

                Color[] newColors = new Color[width * height];

                for (int i = 0; i < height; i++)
                {
                    for (int j = 0; j < width; j++)
                    {
                        if (i < parameter.Padding || j < parameter.Padding || i >= height - parameter.Padding || j >= width - parameter.Padding)
                        {
                            newColors[i * width + j] = new Color(0, 0, 0, 0);
                        }
                        else
                        {
                            int x = i - parameter.Padding;
                            int y = j - parameter.Padding;

                            newColors[i * width + j] = originColors[x * (int)metaData.rect.width + y];
                        }
                    }
                }

                texture2D.SetPixels(newColors);

                texture2D.Apply();

                string spritePath = $"{parameter.Path}{metaData.name}.png".GetUnRepeatFileName();

                File.WriteAllBytes(spritePath, texture2D.EncodeToPNG());

                AssetDatabase.ImportAsset(spritePath);


                TextureImporter importer = (TextureImporter)AssetImporter.GetAtPath(spritePath);

                TextureImporterSettings importerSetting = new TextureImporterSettings();

                importer.ReadTextureSettings(importerSetting);

                importerSetting.textureType = TextureImporterType.Sprite;
                importerSetting.spritePivot = metaData.pivot;
                importerSetting.spriteBorder = metaData.border;
                importerSetting.spriteAlignment = metaData.alignment;
                importerSetting.alphaIsTransparency = true;

                importer.SetTextureSettings(importerSetting);

                importer.isReadable = true;
                importer.name = metaData.name;
                importer.spriteImportMode = SpriteImportMode.Single;
                importer.maxTextureSize = ExMath.NextPOT(Mathf.Max(width, height));

                importer.SaveAndReimport();
            }

            EditorUtility.ClearProgressBar();
        }

        protected Parameter CreateSliceParameter()
        {
            if (string.IsNullOrEmpty(Instance.SlicePath))
            {
                throw new Exception("Path不能为空");
            }

            string directory = Instance.SlicePath.TrimEnd('/', '\\') + "/";

            if(string.IsNullOrEmpty(directory) || !Directory.Exists(directory))
            {
                throw new Exception("文件夹不存在");
            }

            if (Instance.SlicePadding < 0)
            {
                Instance.SlicePadding = 0;
            }

            if (Instance.SliceAtlas == null)
            {
                throw new Exception("Texture为空");
            }

            Parameter parameter = new Parameter
            {
                Path = directory,
                Padding = Instance.SlicePadding,
                Atlas = Instance.SliceAtlas
            };

            return parameter;
        }


        protected void ScaleTextures(Parameter parameter)
        {
            ScaleTextureBridge(Instance.EditorTexture, parameter);

            for (int i = 0; i < Instance.EditorTextures.Count; i++)
            {
                parameter.Path = parameter.Pathes[i];

                ScaleTextureBridge(Instance.EditorTextures[i], parameter);
            }
        }

        protected void ScaleTextureBridge(Texture2D texture, Parameter parameter)
        {
            if (texture == null)
            {
                 return;
            }

            ScaleTexture(parameter.Padding, parameter.ScaleFactor, parameter.Path, texture, parameter.ScalePlatform);
        }

        protected void ScaleTexture(int padding, float scaleFactor, string path, Texture2D editorTexture, ScalePlatform scalePlatform)
        {
            if (File.Exists(path))
            {
                Debug.LogError($"{path} 存在同名文件");
                return;
            }

            Texture2D texture = ScaleTextureCore(padding, scaleFactor, editorTexture);

            File.WriteAllBytes(path, texture.EncodeToPNG());

            AssetDatabase.ImportAsset(path);


            TextureImporter sourceTextureImporter = (TextureImporter)AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(editorTexture));
            TextureImporter textureImporter = (TextureImporter)AssetImporter.GetAtPath(path);

            TextureImporterSettings importerSetting = new TextureImporterSettings();

            sourceTextureImporter.ReadTextureSettings(importerSetting);

            importerSetting.textureType = sourceTextureImporter.textureType;
            importerSetting.spritePivot = sourceTextureImporter.spritePivot;
            importerSetting.spriteBorder = sourceTextureImporter.spriteBorder*scaleFactor;
            importerSetting.alphaIsTransparency = sourceTextureImporter.alphaIsTransparency;
            importerSetting.spritePixelsPerUnit = sourceTextureImporter.spritePixelsPerUnit/100 * 100*scaleFactor;

            textureImporter.spritePackingTag = sourceTextureImporter.spritePackingTag;

            textureImporter.SetTextureSettings(importerSetting);
            textureImporter.SaveAndReimport();

            List<PlatformReferenceSet> referenceSetList = PlatformReferenceTable.ReadAllLine();

            string sourceGUID = AssetDatabase.AssetPathToGUID(AssetDatabase.GetAssetPath(editorTexture));
            string platformGUID = AssetDatabase.AssetPathToGUID(path);

            PlatformReferenceSet referenceSet = PlatformReferenceManager.GetMatchedReferenceSet(sourceGUID, referenceSetList);

            if (referenceSet == null)
            {
                referenceSet = new PlatformReferenceSet(editorTexture, platformGUID, scalePlatform);

                referenceSetList.Add(referenceSet);
            }
            else
            {
                referenceSet.SetPlatformReference(platformGUID, scalePlatform);
            }

            PlatformReferenceTable.WriteAllLine(referenceSetList);
        }

        protected Texture2D ScaleTextureCore(int padding, float factor, Texture2D sourceTexture)
        {
            if (Math.Abs(factor - 1) < 0.001)
            {
                return sourceTexture.Clone();
            }

            Texture2D texture = AddPaddingToTexture(padding, sourceTexture);

            int originWidth = texture.width;
            int originHeight = texture.height;

            int newWidth = (int)(originWidth * factor);
            int newHeight = (int)(originHeight * factor);

            Texture2D newTexture = new Texture2D(newWidth, newHeight);

            Color[] newColors = new Color[newWidth * newHeight];

            for (int i = 0; i < newHeight; i++)
            {
                for (int j = 0; j < newWidth; j++)
                {
                    newColors[i * newWidth + j] = texture.GetPixelBilinear((j + 0.5f) / newWidth, (i + 0.5f) / newHeight);
                }
            }

            newTexture.SetPixels(newColors);

            return newTexture;
        }

        protected Texture2D AddPaddingToTexture(int padding, Texture2D texture)
        {
            if (padding == 0)
            {
                return texture;
            }

            int originWidth = texture.width;
            int originHeight = texture.height;

            int newWidth = originWidth + 2 * padding;
            int newHeight = originHeight + 2 * padding;

            Texture2D newTexture = new Texture2D(newWidth, newHeight);

            Color[] newColors = new Color[newWidth * newHeight];
            Color[] originColors = texture.GetPixels();

            for (int i = 0; i < originHeight; i++)
            {
                for (int j = 0; j < originWidth; j++)
                {
                    newColors[(i + padding) * newWidth + (j + padding)] = originColors[i * originWidth + j];
                }
            }

            newTexture.SetPixels(newColors);

            return newTexture;
        }

        protected Parameter CreateScaleParameter()
        {
            if (string.IsNullOrEmpty(Instance.ScalePath))
            {
                throw new Exception("Path不能为空");
            }

            string directory = Instance.ScalePath.TrimEnd('/', '\\') + "/";
            
            if (!Directory.Exists(directory))
            {
                throw new Exception("文件夹不存在");
            }

            if (Instance.ScaleFactor <= 0)
            {
                throw new Exception("Factor必须大于0");
            }

            if (Instance.ScalePadding < 0)
            {
                Instance.SlicePadding = 0;
            }

            List<string> pathes = new List<string>();
            
            for (int i = 0; i < Instance.EditorTextures.Count; i++)
            {
                if (Instance.EditorTextures[i] == null)
                {
                    Instance.EditorTextures.RemoveAt(i--);
                }
                else
                {
                    TextureImporter importer1 = (TextureImporter)AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(Instance.EditorTextures[i]));

                    if (!importer1.isReadable)
                    {
                        importer1.isReadable = true;
                        importer1.SaveAndReimport();
                    }

                    pathes.Add(directory + Instance.EditorTextures[i].name + Instance.ScaleName + ".png");
                }
            }

            if (Instance.EditorTexture == null && Instance.EditorTextures.Count == 0)
            {
                throw new Exception("Editor Texture为空");
            }

            TextureImporter importer2 = (TextureImporter) AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(Instance.EditorTexture));

            if (importer2 != null && !importer2.isReadable)
            {
                importer2.isReadable = true;
                importer2.SaveAndReimport();
            }

            Parameter parameter = new Parameter
            {
                Path = directory + Instance.ScaleName + ".png",
                Pathes = pathes,
                Padding = Instance.SlicePadding,
                ScaleFactor = Instance.ScaleFactor,
                ScalePlatform = Instance.ScalePlatform,
                EditorTexture = Instance.EditorTexture,
                EditorTextures = Instance.EditorTextures,
            };

            return parameter;
        }


        protected void SwitchAtlasPlatform(Platform toPlatform)
        {
            for (int i = 0; i < Instance.PlatformSet.Count; i++)
            {
                SwitchAtlasPlatformCore(Instance.PlatformSet[i], toPlatform);
            }
        }

        protected void SwitchAtlasPlatformCore(PlatformSet platformSet, Platform toPlatform)
        {
            string editorPath = AssetDatabase.GetAssetPath(platformSet.EditorObject);
            string mobilePath = AssetDatabase.GetAssetPath(platformSet.MobileObject);
            string desktopPath = AssetDatabase.GetAssetPath(platformSet.DesktopObject);

            AssetBundleManager.SwitchAssetBundle(editorPath, mobilePath, desktopPath, toPlatform);
        }


        public static void GetSelectedPath(ref string value)
        {
            if (Selection.assetGUIDs.Length > 0)
            {
                string path = AssetDatabase.GUIDToAssetPath(Selection.assetGUIDs[0]);

                path = Path.GetDirectoryName(path);

                if (string.IsNullOrEmpty(path))
                {
                    value = "Assets";
                }
                else
                {
                    value = path;
                }
            }
        }

        public static void GetSelectedName(ref string value)
        {
            if (Selection.assetGUIDs.Length > 0)
            {
                string path = AssetDatabase.GUIDToAssetPath(Selection.assetGUIDs[0]);

                value = Path.GetFileNameWithoutExtension(path);
            }
        }


        protected void OnGUI()
        {     
            SerializedObject.Update();

            EditorGUILayout.LabelField("AtlasUtility", TitleGuiStyle, GUILayout.Height(30));

            ScrollPosition = EditorGUILayout.BeginScrollView(ScrollPosition);

            DrawPackAtlasArea();

            DrawSliceAtlasArea();

            DrawSearchReferenceArea();

            DrawReferenceControllArea();

            DrawScaleTextureArea();
            
            DrawDebugArea();

            EditorGUILayout.EndScrollView();

            SerializedObject.ApplyModifiedProperties();
        }

        protected void DrawPackAtlasArea()
        {
            Instance.PackAtlasFunction = EditorGUILayout.Foldout(Instance.PackAtlasFunction, "Pack Atlas");

            if (!Instance.PackAtlasFunction)
            {
                EditorGUILayout.Separator();

                return;
            }

            EditorGUILayout.Separator();

            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.PropertyField(PackPath, new GUIContent("Path"));
            if (GUILayout.Button("UseSelectedPath", GUILayout.MaxWidth(120)))
            {
                GetSelectedPath(ref Instance.PackPath);
            }
            EditorGUILayout.EndHorizontal();
            
            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.PropertyField(PackName, new GUIContent("Name"));
            if (GUILayout.Button("UseSelectedName", GUILayout.MaxWidth(120)))
            {
                GetSelectedName(ref Instance.PackName);
            }
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.PropertyField(packPlan, new GUIContent("Plan"));

            if (Instance.PackPlan == PackPlan.Fixed)
            {
                EditorGUILayout.PropertyField(PackSize, new GUIContent("Size"));
            }
            else if (Instance.PackPlan == PackPlan.Smallest)
            {
                EditorGUILayout.PropertyField(PackSize, new GUIContent("Max Size"));
            }

            EditorGUILayout.PropertyField(PackAtlas, new GUIContent("Atlas"));

            if (Instance.PackAtlas != null)
            {
                List<string> childPathList = ReferenceManager.GetChildSpritePath(AssetDatabase.GetAssetPath(Instance.PackAtlas));

                for (int i = 0; i < childPathList.Count; i++)
                {
                    Instance.TextureList.Add(AssetDatabase.LoadAssetAtPath<Texture2D>(childPathList[i]));
                }

                Instance.PackAtlas = null;
            }

            EditorGUILayout.PropertyField(PackPadding, new GUIContent("Padding"));
            EditorGUILayout.PropertyField(TextureList, true);

            if (GUILayout.Button("Pack", GUILayout.Height(30)))
            {
                Pack();
            }

            EditorGUILayout.Separator();
        }

        protected void DrawSliceAtlasArea()
        {
            EditorGUILayout.Separator();

            Instance.SliceAtlasFunction = EditorGUILayout.Foldout(Instance.SliceAtlasFunction, "Slice Atlas");

            if (!Instance.SliceAtlasFunction)
            {
                EditorGUILayout.Separator();

                return;
            }

            EditorGUILayout.Separator();

            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.PropertyField(SlicePath, new GUIContent("Path"));
            if (GUILayout.Button("UseSelectedPath"))
            {
                GetSelectedPath(ref Instance.SlicePath);
            }
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.PropertyField(SliceAtlas, new GUIContent("Atlas"));

            EditorGUILayout.PropertyField(SlicePadding, new GUIContent("Padding"));

            if (GUILayout.Button("Slice", GUILayout.Height(30)))
            {
                Slice();
            }

            EditorGUILayout.Separator();
        }

        protected void DrawSearchReferenceArea()
        {
            EditorGUILayout.Separator();

            Instance.SearchReferenceFunction = EditorGUILayout.Foldout(Instance.SearchReferenceFunction, "Search Reference");

            if (!Instance.SearchReferenceFunction)
            {
                EditorGUILayout.Separator();

                return;
            }

            EditorGUILayout.Separator();

            EditorGUILayout.PropertyField(SearchTarget);

            if (GUILayout.Button("SearchReference", GUILayout.Height(30)))
            {
                ReferenceManager.FindReference(AssetDatabase.GetAssetPath(Instance.SearchTarget));
            }

            EditorGUILayout.Separator();
        }

        protected void DrawReferenceControllArea()
        {
            EditorGUILayout.Separator();

            Instance.PlatformControllFunction = EditorGUILayout.Foldout(Instance.PlatformControllFunction, "Platform & Reference Controll");

            if (!Instance.PlatformControllFunction)
            {
                EditorGUILayout.Separator();

                return;
            }

            EditorGUILayout.Separator();

            EditorGUILayout.PropertyField(PlatformSet, true);

            EditorGUILayout.Separator();

            if (GUILayout.Button("Enable Atlas", GUILayout.Height(30)))
            {
                if (EditorUtility.DisplayDialog("注意", "用图集替代Sprite?", "继续", "取消"))
                {
                    AtlasReferenceManager.EnableAtlas();
                }
            }

            EditorGUILayout.Separator();

            EditorGUILayout.Separator();

            if (GUILayout.Button("Disable Atlas", GUILayout.Height(30)))
            {
                if (EditorUtility.DisplayDialog("注意", "还原图集到Sprite?", "继续", "取消"))
                {
                    AtlasReferenceManager.DisableAtlas();
                }
            }

            EditorGUILayout.Separator();

            EditorGUILayout.Separator();

            if (GUILayout.Button("Switch To Editor Platform", GUILayout.Height(30)))
            {
                if (EditorUtility.DisplayDialog("注意", "切换平台到Editor?(切换平台会Enable Atlas)", "继续", "取消"))
                {
                    AssetDatabase.Refresh();

                    List<string> fromList = new List<string>();
                    List<string> toList = new List<string>();

                    AtlasReferenceManager.GetDisableFromToList(fromList, toList);
                    PlatformReferenceManager.GetFromToList(Platform.Editor, fromList, toList);
                    AtlasReferenceManager.GetEnableFromToList(fromList, toList);
                    ReferenceManager.ChangeReference(true, fromList, toList);
                    SwitchAtlasPlatform(Platform.Editor);
                }
            }

            EditorGUILayout.Separator();

            EditorGUILayout.Separator();

            if (GUILayout.Button("Switch To Mobile Platform", GUILayout.Height(30)))
            {
                if (EditorUtility.DisplayDialog("注意", "切换平台到Mobile?(切换平台会Enable Atlas)", "继续", "取消"))
                {
                    AssetDatabase.Refresh();

                    List<string> fromList = new List<string>();
                    List<string> toList = new List<string>();

                    AtlasReferenceManager.GetDisableFromToList(fromList, toList);
                    PlatformReferenceManager.GetFromToList(Platform.Mobile, fromList, toList);
                    AtlasReferenceManager.GetEnableFromToList(fromList, toList);
                    ReferenceManager.ChangeReference(true, fromList, toList);
                    SwitchAtlasPlatform(Platform.Mobile);
                }
            }

            EditorGUILayout.Separator();

            EditorGUILayout.Separator();

            if (GUILayout.Button("Switch To Desktop Platform", GUILayout.Height(30)))
            {
                if (EditorUtility.DisplayDialog("注意", "切换平台到Desktop?(切换平台会Enable Atlas)", "继续", "取消"))
                {
                    AssetDatabase.Refresh();

                    List<string> fromList = new List<string>();
                    List<string> toList = new List<string>();

                    AtlasReferenceManager.GetDisableFromToList(fromList, toList);
                    PlatformReferenceManager.GetFromToList(Platform.Desktop, fromList, toList);
                    AtlasReferenceManager.GetEnableFromToList(fromList, toList);
                    ReferenceManager.ChangeReference(true, fromList, toList);
                    SwitchAtlasPlatform(Platform.Desktop);
                }
            }

            EditorGUILayout.Separator();
        }

        protected void DrawScaleTextureArea()
        {
            EditorGUILayout.Separator();

            Instance.ScaleTextureFunction = EditorGUILayout.Foldout(Instance.ScaleTextureFunction, "Scale Texture");

            if (!Instance.ScaleTextureFunction)
            {
                EditorGUILayout.Separator();

                return;
            }

            EditorGUILayout.Separator();

            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.PropertyField(ScalePath, new GUIContent("Path"));
            if (GUILayout.Button("UseSelectedPath", GUILayout.MaxWidth(120)))
            {
                GetSelectedPath(ref Instance.ScalePath);
            }
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.PropertyField(ScaleName, new GUIContent("Name & Suffix"));

            EditorGUILayout.PropertyField(ScaleFactor, new GUIContent("Factor"));
            EditorGUILayout.PropertyField(ScalePadding, new GUIContent("Padding"));

            EditorGUILayout.PropertyField(EditorTexture, new GUIContent("Editor Texture"));
            EditorGUILayout.PropertyField(EditorTextures, new GUIContent("Editor Textures"), true);
            if (Instance.EditorTexture != Instance.LastEdiotTexture)
            {
                if (Instance.EditorTexture != null)
                {
                    Instance.ScaleName = Instance.EditorTexture.name;
                }

                PlatformReferenceSet referenceSet = PlatformReferenceManager.GetMatchedReferenceSet(Instance.EditorTexture);

                if (referenceSet != null)
                {
                    Instance.EditorTexture = referenceSet.EditorTexture;
                    Instance.MobileTexture = referenceSet.MobileTexture;
                    Instance.DesktopTexture = referenceSet.DesktopTexture;
                }
                else
                {
                    Instance.MobileTexture = null;
                    Instance.DesktopTexture = null;
                }
            }
            Instance.LastEdiotTexture = Instance.EditorTexture;

            if (Instance.MobileTexture != null)
            {
                EditorGUILayout.BeginHorizontal();
                EditorGUILayout.PropertyField(MobileTexture, new GUIContent("Mobile Texture"));
                EditorGUILayout.EndHorizontal();
            }

            if (Instance.DesktopTexture != null)
            {
                EditorGUILayout.BeginHorizontal();
                EditorGUILayout.PropertyField(DesktopTexture, new GUIContent("Desktop Texture"));
                EditorGUILayout.EndHorizontal();
            }

                EditorGUILayout.PropertyField(ScalePlatform, new GUIContent("Target Platform"));

            if (GUILayout.Button("Scale", GUILayout.Height(30)))
            {
                Parameter parameter = CreateScaleParameter();

                ScaleTextures(parameter);
            }

            EditorGUILayout.Separator();
        }

        protected void DrawDebugArea()
        {
            EditorGUILayout.Separator();

            Instance.DebugFunction = EditorGUILayout.Foldout(Instance.DebugFunction, "Debug");

            if (!Instance.DebugFunction)
            {
                return;
            }

            if (GUILayout.Button("CollectDebugInfo", GUILayout.Height(30)))
            {
                CollectDebugInfo();
            }
        }
    }
}