using UnityEngine; using System.Collections; using System.Collections.Generic; using UnityEditor; using System.IO; using System.Reflection;public class RemoveAlphaChanel{[MenuItem("TextureTest/Remove Texture Alpha Chanel")]static void ModifyTextures(){Debug.Log("Start Removing Alpha Chanel.");string[] paths = Directory.GetFiles(Application.dataPath, "*.*", SearchOption.AllDirectories);foreach (string path in paths){if (!string.IsNullOrEmpty(path) && IsTextureFile(path)) //full name{RemoveTextureAlphaChanel(path);}}AssetDatabase.Refresh(); //Refresh to ensure new generated RBA and Alpha textures shown in Unity as well as the meta fileDebug.Log("Finish Removing Alpha Chanel.");}[MenuItem("TextureTest/LimitTextureSizeTo128")]static void LimitTextures(){Debug.Log("Start Limit Textures.");string[] paths = Directory.GetFiles(Application.dataPath, "*.*", SearchOption.AllDirectories);foreach (string path in paths){if (!string.IsNullOrEmpty(path) && IsTextureFile(path)) //full name{try{string assetRelativePath = GetRelativeAssetPath(path);ReImportAsset(assetRelativePath);Debug.Log("Limit Texture: " + assetRelativePath);}catch{Debug.LogError("ReImport Texture failed: " + GetRelativeAssetPath(path));}}}AssetDatabase.Refresh(); //Refresh to ensure new generated RBA and Alpha textures shown in Unity as well as the meta fileDebug.Log("Finish Limit Textures.");}#region process texturestatic void RemoveTextureAlphaChanel(string _texPath){string assetRelativePath = GetRelativeAssetPath(_texPath);SetTextureReadableEx(assetRelativePath); //set readable flag and set textureFormat TrueColorTexture2D sourcetex = Resources.LoadAssetAtPath(assetRelativePath, typeof(Texture2D)) as Texture2D; //not just the textures under Resources fileif (!sourcetex){Debug.LogError("Load Texture Failed : " + assetRelativePath);return;}if (IsNoAlphaTexture(sourcetex)){Debug.Log("pass. no Alpha texture: " + assetRelativePath);return;}#region Get origion Mipmap SettingTextureImporter ti = null;try{ti = (TextureImporter)TextureImporter.GetAtPath(assetRelativePath);}catch{Debug.LogError("Load Texture failed: " + assetRelativePath);return;}if (ti == null){return;}bool bGenerateMipMap = ti.mipmapEnabled; //same with the texture import setting#endregionTexture2D rgbTex = new Texture2D(sourcetex.width, sourcetex.height, TextureFormat.RGB24, bGenerateMipMap);rgbTex.SetPixels(sourcetex.GetPixels());rgbTex.Apply();byte[] bytes = rgbTex.EncodeToPNG();File.WriteAllBytes(assetRelativePath, bytes);ReImportAsset(assetRelativePath, sourcetex.width, sourcetex.height);Debug.Log("Succeed Removing Alpha : " + assetRelativePath);}static bool IsNoAlphaTexture(Texture2D texture){return texture.format == TextureFormat.RGB24;}static void SetTextureReadableEx(string _relativeAssetPath) //set readable flag and set textureFormat TrueColor{TextureImporter ti = null;try{ti = (TextureImporter)TextureImporter.GetAtPath(_relativeAssetPath);}catch{Debug.LogError("Load Texture failed: " + _relativeAssetPath);return;}if (ti == null){return;}ti.isReadable = true;ti.textureFormat = TextureImporterFormat.AutomaticTruecolor;//this is essential for departing Textures for ETC1. No compression format for following operation.AssetDatabase.ImportAsset(_relativeAssetPath);}static void ReImportAsset(string path){TextureImporter importer = null;try{importer = (TextureImporter)TextureImporter.GetAtPath(path);}catch{Debug.LogError("Load Texture failed: " + path);return;}if (importer == null){return;}importer.maxTextureSize = 128;importer.anisoLevel = 0;importer.isReadable = false; //increase memory cost if readable is trueimporter.textureFormat = TextureImporterFormat.AutomaticCompressed;AssetDatabase.ImportAsset(path);}static void ReImportAsset(string path, int width, int height){try{AssetDatabase.ImportAsset(path);}catch{Debug.LogError("Import Texture failed: " + path);return;}TextureImporter importer = null;try{importer = (TextureImporter)TextureImporter.GetAtPath(path);}catch{Debug.LogError("Load Texture failed: " + path);return;}if (importer == null){return;}importer.maxTextureSize = Mathf.Max(width, height);importer.anisoLevel = 0;importer.isReadable = false; //increase memory cost if readable is trueimporter.textureFormat = TextureImporterFormat.AutomaticCompressed;importer.textureType = TextureImporterType.Image;if (path.Contains("/UI/")){importer.textureType = TextureImporterType.GUI;}AssetDatabase.ImportAsset(path);}#endregion#region string or path helperstatic bool IsTextureFile(string _path){string path = _path.ToLower();return path.EndsWith(".psd") || path.EndsWith(".tga") || path.EndsWith(".png") || path.EndsWith(".jpg") || path.EndsWith(".bmp") || path.EndsWith(".tif") || path.EndsWith(".gif");}static string GetRelativeAssetPath(string _fullPath){_fullPath = GetRightFormatPath(_fullPath);int idx = _fullPath.IndexOf("Assets");string assetRelativePath = _fullPath.Substring(idx);return assetRelativePath;}static string GetRightFormatPath(string _path){return _path.Replace("\\", "/");}static string GetFilePostfix(string _filepath) //including '.' eg ".tga", ".png", no".dds"{string postfix = "";int idx = _filepath.LastIndexOf('.');if (idx > 0 && idx < _filepath.Length)postfix = _filepath.Substring(idx, _filepath.Length – idx);return postfix;}#endregion}
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