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 }