Unity --- 在原目录中，将选中的Texture剥离为rgb和alpha

  1 using System.Collections;
  2 using System.Collections.Generic;
  3 using UnityEngine;
  4 using UnityEditor;
  5 using System;
  6 using UObject = UnityEngine.Object;
  7 using System.IO;
  8 
  9 public class lgs
 10 {
 11     [MenuItem("Assets/AlphaSpliter ")]
 12     static void AlphaSpliter()
 13     {
 14         UObject[] objs = Selection.objects;
 15         for (int i = 0; i < objs.Length; i++)
 16         {
 17             Texture tex = objs[i] as Texture;
 18             CreateRGBTexture(tex);
 19             CreateAlphaTexture(tex as Texture2D);
 20         }
 21     }
 22 
 23     static void CreateAlphaTexture(Texture2D src)
 24     {
 25         if (null == src)
 26             throw new ArgumentNullException("src");
 27 
 28         //create alpha texture
 29         var srcPixels = src.GetPixels();
 30         var targetPixels = new Color[srcPixels.Length];
 31         for (int i = 0, iMax = srcPixels.Length; i < iMax; ++i)
 32         {
 33             float r = srcPixels[i].a;
 34             targetPixels[i] = new Color(r, r, r);
 35         }
 36 
 37         Texture2D alphaTex = new Texture2D(src.width, src.height, TextureFormat.ARGB32, false);
 38         alphaTex.SetPixels(targetPixels);
 39         alphaTex.Apply();
 40 
 41         //save alpha texture
 42         string srcPath = AssetDatabase.GetAssetPath(src);
 43         string ext = Path.GetExtension(srcPath);
 44         string newPath = string.Format("{0}{1}{2}", srcPath.Substring(0, srcPath.Length - ext.Length), "_alpha", ext);
 45         string fullPath = GetFullPath(newPath);
 46         var bytes = alphaTex.EncodeToPNG();
 47         File.WriteAllBytes(fullPath, bytes);
 48 
 49         AssetDatabase.SaveAssets();
 50         AssetDatabase.Refresh();
 51 
 52         int size = Mathf.Max(src.width, src.height, 32);
 53         Setting(newPath, size, TextureImporterFormat.ETC_RGB4, TextureImporterFormat.PVRTC_RGB4);
 54     }
 55 
 56     static void CreateRGBTexture(Texture src)
 57     {
 58         if (null == src)
 59             throw new ArgumentNullException("src");
 60 
 61         string srcPath = AssetDatabase.GetAssetPath(src);
 62         string ext = Path.GetExtension(srcPath);
 63         string newPath = string.Format("{0}{1}{2}", srcPath.Substring(0, srcPath.Length - ext.Length), "_rgb", ext);
 64 
 65 
 66         AssetDatabase.DeleteAsset(newPath);
 67         AssetDatabase.CopyAsset(srcPath, newPath);
 68         AssetDatabase.ImportAsset(newPath);
 69 
 70         int size = Mathf.Max(src.width, src.height, 32);
 71         Setting(newPath, size, TextureImporterFormat.ETC_RGB4, TextureImporterFormat.PVRTC_RGB4);
 72     }
 73 
 74     static void Setting(string assetPath, int maxSize, TextureImporterFormat androidFormat, TextureImporterFormat iosFormat)
 75     {
 76         var texImporter = AssetImporter.GetAtPath(assetPath) as TextureImporter;
 77         {
 78             texImporter.npotScale = TextureImporterNPOTScale.ToNearest;
 79             texImporter.isReadable = false;
 80             texImporter.mipmapEnabled = false;
 81             texImporter.alphaIsTransparency = true;
 82             texImporter.wrapMode = TextureWrapMode.Clamp;
 83             texImporter.filterMode = FilterMode.Bilinear;
 84             texImporter.anisoLevel = 4;    //纹理的各向异性滤波水平
 85             texImporter.SetPlatformTextureSettings("Android", maxSize, androidFormat);
 86             texImporter.SetPlatformTextureSettings("iPhone", maxSize, iosFormat);
 87             texImporter.SetPlatformTextureSettings("Standalone", maxSize, TextureImporterFormat.ARGB32);
 88         }
 89 
 90         AssetDatabase.ImportAsset(assetPath);
 91         AssetDatabase.SaveAssets();
 92     }
 93 
 94     /// <summary>
 95     /// asset path 转 full path
 96     /// </summary>
 97     public static string GetFullPath(string assetPath)
 98     {
 99         if (string.IsNullOrEmpty(assetPath))
100             return "";
101 
102         string p = Application.dataPath + assetPath.Substring(6);
103         return p.Replace("\", "/");
104     }
105 
106     /// <summary>
107     /// full path 转 asset path
108     /// </summary>
109     public static string GetAssetPath(string fullPath)
110     {
111         if (string.IsNullOrEmpty(fullPath))
112             return "";
113 
114         fullPath = fullPath.Replace("\", "/");
115         return fullPath.StartsWith("Assets/") ?
116             fullPath :
117             "Assets" + fullPath.Substring(Application.dataPath.Length);
118     }
119 }