feilong-client/Assets/Scripts/Business/Editor/Tools/FLAssetPostprocessor.Texture.cs

using UnityEditor;
using UnityEngine;
using XGame.Editor.Asset.Tools;

namespace FL.Editor
{
    /// <summary>
    /// 纹理资源属性预设
    /// </summary>
    public partial class FLAssetPostprocessor : AssetPostprocessor
    {
        /// <summary>
        /// Assets相对路径前缀
        /// </summary>
        private const string ResRelative = "Assets/Res/";
        private const string i18nRelative = "Assets/i18n/"; 
        
        private const string Readable = "readable";
        private const string Mipmap = "mipmap";
        
        private const string UIAtlas = "/Atlas/";
        
        private const string Sprites = "/Sprites/";
        
        private const string Textures = "/Textures/";

        private const string FGUITextures = "/Addressable/FGUI/";
        
        private const string SpineTextures = "/Spines/";
        
        private const int AtlasTextureMaxSize = 512;
        private const int TextureMaxSize = 2048;
        private const TextureImporterFormat HaveAlphaSettingFormat = TextureImporterFormat.ASTC_6x6;
        private const TextureImporterFormat AndroidNoAlphaSettingFormat = TextureImporterFormat.ETC2_RGB4;
        private const TextureImporterFormat IosNoAlphaSettingFormat = TextureImporterFormat.ASTC_6x6;
        
        private void OnPreprocessTexture()
        {
            if (!assetPath.StartsWith(ResRelative))
                return;
            // CheckTextureAlpha(assetPath);

            var textureImporter = (TextureImporter)assetImporter;
            textureImporter.isReadable = assetPath.ToLower().Contains(Readable);
            textureImporter.anisoLevel = 1;

            var haveAlpha = textureImporter.DoesSourceTextureHaveAlpha();
        
            #region Atlas
        
            if (assetPath.Contains(UIAtlas))
            {
                textureImporter.textureType = TextureImporterType.Sprite;
                textureImporter.spriteImportMode = SpriteImportMode.Single;
                textureImporter.mipmapEnabled = false;
                var defaultSetting = textureImporter.GetDefaultPlatformTextureSettings();
                defaultSetting.format = TextureImporterFormat.Automatic;
                defaultSetting.textureCompression = TextureImporterCompression.Uncompressed;
                defaultSetting.maxTextureSize = AtlasTextureMaxSize;
                textureImporter.SetPlatformTextureSettings(defaultSetting);
        
                return;
            }
        
            #endregion
        
            #region Sprite
        
            if (assetPath.Contains(Sprites))
            {
                textureImporter.textureType = TextureImporterType.Sprite;
                textureImporter.spriteImportMode = SpriteImportMode.Single;
                textureImporter.mipmapEnabled = false;
                textureImporter.npotScale = TextureImporterNPOTScale.None;
                var defaultSetting = textureImporter.GetDefaultPlatformTextureSettings();
                defaultSetting.format = TextureImporterFormat.Automatic;
                defaultSetting.textureCompression = TextureImporterCompression.Compressed;
                defaultSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(defaultSetting);
                //ios
                var iosSetting = textureImporter.GetPlatformTextureSettings("iOS");
                iosSetting.overridden = true;
                iosSetting.format = haveAlpha ? HaveAlphaSettingFormat : IosNoAlphaSettingFormat;
                iosSetting.textureCompression = TextureImporterCompression.Compressed;
                iosSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(iosSetting);
                //Android
                var androidSetting = textureImporter.GetPlatformTextureSettings("Android");
                androidSetting.overridden = true;
                androidSetting.format = haveAlpha ? HaveAlphaSettingFormat : AndroidNoAlphaSettingFormat;
                androidSetting.textureCompression = TextureImporterCompression.Compressed;
                androidSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(androidSetting);
        
                return;
            }
            #endregion

            #region Texture
            if (assetPath.Contains(Textures) || assetPath.Contains(FGUITextures))
            {
                textureImporter.textureType = TextureImporterType.Default;
                // Unity导入贴图默认使用的sprite，切换为Default时会开启mipmapEnabled，因此需要在设置textureType后再设置mipmapEnabled
                textureImporter.mipmapEnabled = assetPath.ToLower().Contains(Mipmap);
                var defaultSetting = textureImporter.GetDefaultPlatformTextureSettings();
                defaultSetting.format = TextureImporterFormat.Automatic;
                defaultSetting.textureCompression = TextureImporterCompression.Compressed;
                defaultSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(defaultSetting);
                //ios
                var iosSetting = textureImporter.GetPlatformTextureSettings("iOS");
                iosSetting.overridden = true;
                iosSetting.format = haveAlpha ? HaveAlphaSettingFormat : IosNoAlphaSettingFormat;
                iosSetting.textureCompression = TextureImporterCompression.Compressed;
                iosSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(iosSetting);
                //Android
                var androidSetting = textureImporter.GetPlatformTextureSettings("Android");
                androidSetting.overridden = true;
                androidSetting.format = haveAlpha ? HaveAlphaSettingFormat : AndroidNoAlphaSettingFormat;
                androidSetting.textureCompression = TextureImporterCompression.Compressed;
                androidSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(androidSetting);
        
                return;
            }

            #endregion

            #region Spine
            return;
            if (assetPath.Contains(SpineTextures))
            {
                textureImporter.textureType = TextureImporterType.Default;
                // Unity导入贴图默认使用的sprite，切换为Default时会开启mipmapEnabled，因此需要在设置textureType后再设置mipmapEnabled
                textureImporter.mipmapEnabled = assetPath.ToLower().Contains(Mipmap);
                textureImporter.npotScale = TextureImporterNPOTScale.None;

                var defaultSetting = textureImporter.GetDefaultPlatformTextureSettings();
                defaultSetting.format = TextureImporterFormat.Automatic;
                defaultSetting.textureCompression = TextureImporterCompression.CompressedHQ;
                defaultSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(defaultSetting);
                //ios
                var iosSetting = textureImporter.GetPlatformTextureSettings("iOS");
                iosSetting.overridden = true;
                iosSetting.format = haveAlpha ? HaveAlphaSettingFormat : IosNoAlphaSettingFormat;
                iosSetting.textureCompression = TextureImporterCompression.CompressedHQ;
                iosSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(iosSetting);
                //Android
                var androidSetting = textureImporter.GetPlatformTextureSettings("Android");
                androidSetting.overridden = true;
                androidSetting.format = haveAlpha ? HaveAlphaSettingFormat : AndroidNoAlphaSettingFormat;
                androidSetting.compressionQuality = 100; //这个参数是百分比的意思，100的时候才能保持贴图精度
                androidSetting.textureCompression = TextureImporterCompression.CompressedHQ;
                androidSetting.maxTextureSize = TextureMaxSize;
                textureImporter.SetPlatformTextureSettings(androidSetting);
            }
            #endregion
        }

        private void OnPostprocessTexture(Texture2D texture)
        {
            //检测texture
            var task = new TextureVerifyTask();
            task.VerifyTextureByPath(assetPath);
            //Packages 文件夹下不判断
            //if (assetPath.Contains("Packages"))
            //    return;
            //if (assetPath.ToLower().Contains("atlas"))
            //    return;
            //if (EditorUtility.DisplayDialog(title, message, confirm))
            //{
            //    AssetDatabase.DeleteAsset(assetPath);
            //    AssetDatabase.Refresh();
            //}
        }
    }

}