如题一个编辑器小工具，主要在于Editor接口的使用和判断一张图片有无alpha通道，下面直接上代码：
#region atlas deal public static int ComPRessQuality = 50; public static float halveRate = 0.5f; [MenuItem("Tools/HalveAtlas")] public static void HalveAtlas() { UnityEngine.Object[] objects = Selection.GetFiltered(typeof(UnityEngine.Object), SelectionMode.Assets); //获取选择文件夹 for (int i = 0; i < objects.Length; i++) { string dirPath = AssetDatabase.GetAssetPath(objects[i]).Replace("//", "/"); if (!Directory.Exists(dirPath)) { EditorUtility.DisplayDialog("错误", "选择正确文件夹！", "好的"); continue; } HalveSprite(dirPath); } } private static void HalveSprite(string dirPath) { string[] files = Directory.GetFiles(dirPath, "*.*", SearchOption.AllDirectories); for (int i = 0; i < files.Length; i++) { string filePath = files[i]; filePath = filePath.Replace("//", "/"); if (filePath.EndsWith(".png") || filePath.EndsWith(".jpg")) { //筛选出png和jpg图片 EditorUtility.DisplayProgressBar("处理中>>>", filePath, (float)i / (float)files.Length); TextureImporter textureImporter = AssetImporter.GetAtPath(filePath) as TextureImporter; if (textureImporter == null) return; //判断图片有无alpha通道，有默认格式设置成：RGBA16；无默认格式设置成：RGB16 textureImporter.textureFormat = TextureImporterFormat.AutomaticTruecolor; AssetDatabase.ImportAsset(filePath); Texture2D texture = AssetDatabase.LoadAssetAtPath<Texture2D>(filePath); int textureSize = Math.Max(texture.height, texture.width); TextureImporterFormat defaultTextureFormat = TextureImporterFormat.RGB16; if (texture.format == TextureFormat.RGB24) { //no alpha defaultTextureFormat = TextureImporterFormat.RGB16; } else { defaultTextureFormat = TextureImporterFormat.RGBA16; } TextureImporterSettings settings = new TextureImporterSettings(); textureImporter.ReadTextureSettings(settings); textureImporter.textureType = TextureImporterType.Advanced; int defaultMaxTextureSize = settings.maxTextureSize; defaultMaxTextureSize = Math.Min(textureSize, defaultMaxTextureSize); defaultMaxTextureSize = (int)(defaultMaxTextureSize * halveRate); settings.textureFormat = defaultTextureFormat; settings.maxTextureSize = GetValidSize(defaultMaxTextureSize); int androidMaxTextureSize = 0; TextureImporterFormat androidTextureFormat = UnityEditor.TextureImporterFormat.ETC_RGB4; bool isAndroidOverWrite = textureImporter.GetPlatformTextureSettings("Android", out androidMaxTextureSize, out androidTextureFormat); if (true == isAndroidOverWrite) { androidMaxTextureSize = Math.Min(textureSize, androidMaxTextureSize); androidMaxTextureSize = (int)(androidMaxTextureSize * halveRate); textureImporter.SetPlatformTextureSettings("Android", GetValidSize(androidMaxTextureSize), androidTextureFormat, CompressQuality); } int iphoneMaxTextureSize = 0; TextureImporterFormat iphoneTextureFormat = UnityEditor.TextureImporterFormat.PVRTC_RGBA4; bool isIphoneOverWrite = textureImporter.GetPlatformTextureSettings("iPhone", out iphoneMaxTextureSize, out iphoneTextureFormat); if (true == isIphoneOverWrite) { iphoneMaxTextureSize = Math.Min(textureSize, iphoneMaxTextureSize); iphoneMaxTextureSize = (int)(iphoneMaxTextureSize * halveRate); textureImporter.SetPlatformTextureSettings("iPhone", GetValidSize(iphoneMaxTextureSize), iphoneTextureFormat, CompressQuality); } textureImporter.SetTextureSettings(settings); AssetDatabase.SaveAssets(); DoAssetReimport(filePath, ImportAssetOptions.ForceUpdate | ImportAssetOptions.ForceSynchronousImport); } } EditorUtility.ClearProgressBar(); EditorUtility.DisplayDialog("成功", "处理完成！", "好的"); } private static int GetValidSize(int size) { int result = 0; if (size <= 48) { result = 32; } else if (size <= 96) { result = 64; } else if (size <= 192) { result = 128; } else if (size <= 384) { result = 256; } else if (size <= 768) { result = 512; } else if (size <= 1536) { result = 1024; } else if (size <= 3072) { result = 2048; } return result; } public static void DoAssetReimport(string path, ImportAssetOptions options) { try { AssetDatabase.StartAssetEditing(); AssetDatabase.ImportAsset(path, options); } finally { AssetDatabase.StopAssetEditing(); } } #endregion新闻热点
疑难解答
