使用平台说明：Win7 , Unity2017 , TexturePacker 4.9
起因是项目优化时，为了将UGUI原始的SpritePacker替换，我们打包AB时发现始终会包含原始的Texture（图集中元素）文件，这样就产生了大量冗余。TexturePacker提供了许多方便的命令行指令，具体参数可以通过命令行窗口TexturePacker.exe查看。
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/// <summary> /// 基于Texture Packer的批量图集打包 /// </summary> public class BatchAtlasPackerEditor { private static string PACKER_ARGS = " --data \"{0}.tpsheet\" --format unity-texture2d --sheet \"{0}.png\"" + " --max-size 2048 --disable-rotation --no-trim --opt RGBA8888 --texture-format png " + "--scale 1 {1}";// private static string MULTIP_PACKER_ARGS = " --data \"{0}-{{n}}.tpsheet\" --format unity-texture2d --sheet \"{0}_{{n}}.png\" " + "--multipack --max-size 2048 --disable-rotation --no-trim --opt RGBA8888 --texture-format png " + "--scale 1 {1}";// //查询原来的Sprite 图集分包信息 private static Dictionary<string, TextureAtlas> findSpriteAtlas(string srcTextutresPath) { Dictionary<string, TextureAtlas> textureAtlas = new Dictionary<string, TextureAtlas>(); string[] textures = AssetDatabase.FindAssets("t:Texture2D", new[] { srcTextutresPath }); for (int i = 0, length = textures.Length; i < length; i++) { string texPath = AssetDatabase.GUIDToAssetPath(textures[i]); TextureImporter importer = AssetImporter.GetAtPath(texPath) as TextureImporter; string atlasName = importer.spritePackingTag; if (string.IsNullOrEmpty(atlasName)) { UnityEngine.Debug.LogWarning(texPath); continue; } TextureAtlas ta = null; if (!textureAtlas.TryGetValue(atlasName, out ta)) { ta = new TextureAtlas(atlasName); textureAtlas[atlasName] = ta; } ta.Textures.Add(texPath); } return textureAtlas; } private static void buildAtlas(TextureAtlas atlas , bool isMultiPack) { string atlasPath = "Assets/AtlasTextures/" + atlas.AtlasName; //存放的目录 StringBuilder buf = new StringBuilder(); List<string> texturePaths = atlas.Textures; for (int i = 0 , count = texturePaths.Count ; i < count; i++) { buf.AppendFormat("\"{0}\" ", texturePaths[i]); } string files = buf.ToString(); string args = string.Empty; if (isMultiPack) args = string.Format(MULTIP_PACKER_ARGS, Path.GetFullPath(atlasPath), files); else args = string.Format(PACKER_ARGS, Path.GetFullPath(atlasPath), files); startTexturePacker(args); } private static void startTexturePacker(string args) { ProcessStartInfo start = new ProcessStartInfo("TexturePacker.exe"); start.Arguments = args; start.CreateNoWindow = true; start.WindowStyle = ProcessWindowStyle.Hidden; start.ErrorDialog = false; start.UseShellExecute = false; start.RedirectStandardOutput = true; start.RedirectStandardError = true; start.RedirectStandardInput = true; start.StandardOutputEncoding = System.Text.UTF8Encoding.UTF8; start.StandardErrorEncoding = System.Text.UTF8Encoding.UTF8; Process p = Process.Start(start); UnityEngine.Debug.Log(p.StandardOutput.ReadToEnd()); string error = p.StandardError.ReadToEnd(); if (!string.IsNullOrEmpty(error) && error.Contains("load")) UnityEngine.Debug.LogError(error); p.WaitForExit(); p.Dispose(); } private static string getTextureFiles(string folder) { string[] textures = AssetDatabase.FindAssets("t:Texture2D", new[] { folder }); StringBuilder buf = new StringBuilder(); for (int i = 0; i < textures.Length; i++) { buf.AppendFormat("\"{0}\" ", AssetDatabase.GUIDToAssetPath(textures[i])); } return buf.ToString(); } //批量打包图集 public static void BatchAtlasPack() { //find atlas Dictionary<string, TextureAtlas> textureAtlas = findSpriteAtlas(); onBuildAtlas(textureAtlas); } private static void saveTextureImport(TextureImporter textureImport) { // textureImport.textureType = TextureImporterType.Default; // textureImport.mipmapEnabled = false; textureImport.filterMode = FilterMode.Bilinear; textureImport.maxTextureSize = 2048; textureImport.wrapMode = TextureWrapMode.Clamp; //compress TextureImporterPlatformSettings defaultSetting = textureImport.GetDefaultPlatformTextureSettings(); defaultSetting.textureCompression = TextureImporterCompression.Compressed; defaultSetting.compressionQuality = (int)TextureCompressionQuality.Best; TextureImporterPlatformSettings texPlatformSetting = textureImport.GetPlatformTextureSettings("Android"); texPlatformSetting.format = TextureImporterFormat.ETC2_RGBA8; texPlatformSetting.compressionQuality = (int)TextureCompressionQuality.Best; TextureImporterPlatformSettings iosSetting = textureImport.GetPlatformTextureSettings("iPhone"); iosSetting.format = TextureImporterFormat.PVRTC_RGBA4; iosSetting.compressionQuality = (int)TextureCompressionQuality.Best; textureImport.SaveAndReimport(); } private static string unescapeName(string name) { return name.Replace("%23", "#").Replace("%3A", ":").Replace("%3B", ";") .Replace("%25", "%").Replace("/", "-"); } //重新导入绑定九宫格数据 private static void setAtlasSpriteBorders(TextureAtlas atlas) { Dictionary<string, Vector4> spriteBorders = findAtlasSpriteBorders(atlas); //update sheet string sheetPath = string.Format("{0}/{1}/{1}.tpsheet", ATLAS_PARENT, atlas.AtlasName); if (!File.Exists(sheetPath)) return; string atlasName = Path.GetFileNameWithoutExtension(sheetPath); string[] lines = File.ReadAllLines(sheetPath); for (int i = 0; i < lines.Length; i++) { string line = lines[i]; if (line.StartsWith(":borders=")) { string a2 = line.Remove(0, 9).ToLower().Trim(); lines[i] = line.Replace(a2, "enabled"); break; } } for (int i = 0; i < lines.Length; i++) { string line = lines[i]; if (string.IsNullOrEmpty(line) || line.StartsWith("#") || line.StartsWith(":")) continue; string[] metaDatas = line.Split(';'); string spriteName = unescapeName(metaDatas[0]); int index = 1 + 4 + 2 - 1; //name + rect + pivot Vector4 border; if (spriteBorders.TryGetValue(spriteName, out border)) { if (metaDatas.Length < index + 4) { string[] newMetaDatas = new string[metaDatas.Length + 4]; Array.Copy(metaDatas, newMetaDatas, metaDatas.Length); metaDatas = newMetaDatas; } metaDatas[index + 1] = " " + (int)border.x; metaDatas[index + 2] = Convert.ToString((int)border.z); metaDatas[index + 3] = Convert.ToString((int)border.w); metaDatas[index + 4] = Convert.ToString((int)border.y); } lines[i] = string.Join(";", metaDatas); } File.WriteAllLines(sheetPath, lines); //reimporter atlas string atlasPath = string.Format("{0}/{1}/{1}.png", ATLAS_PARENT, atlasName); TextureImporter ti = AssetImporter.GetAtPath(atlasPath) as TextureImporter; if (ti == null) { UnityEngine.Debug.Log("Cant find atlas !" + atlasPath); return; } saveTextureImport(ti); } private static Dictionary<string, Vector4> findAtlasSpriteBorders(TextureAtlas atlas) { string[] textures = atlas.Textures.ToArray(); Dictionary<string, Vector4> spriteBorders = new Dictionary<string, Vector4>(); for (int i = 0; i < textures.Length; i++) { string assetPath = textures[i]; string spriteName = Path.GetFileNameWithoutExtension(assetPath); TextureImporter ti = AssetImporter.GetAtPath(assetPath) as TextureImporter; if (ti.spriteBorder != Vector4.zero) spriteBorders[spriteName] = ti.spriteBorder; } return spriteBorders; } } public class TextureAtlas { public string AtlasName; public bool IsMultiPack; public List<string> Textures; public TextureAtlas(string atlasName) { AtlasName = atlasName; Textures = new List<string>(); } } |
