Texture Post Processor

using UnityEditor;
using UnityEngine;

namespace ManaSeed.Editor
{
    public class TexturePostProcessor : AssetPostprocessor
    {
        private void OnPostprocessTexture(Texture2D texture)
        {
            TextureImporter importer = assetImporter as TextureImporter;
            importer.spritePixelsPerUnit = 16;
            importer.wrapMode = TextureWrapMode.Clamp;
            importer.filterMode = FilterMode.Point;
            importer.textureCompression = TextureImporterCompression.Uncompressed;

            if (texture.width <= 32 && texture.height <= 32)
                importer.maxTextureSize = 32;
            else if (texture.width <= 64 && texture.height <= 64)
                importer.maxTextureSize = 64;
            else if (texture.width <= 128 && texture.height <= 128)
                importer.maxTextureSize = 128;
            else if (texture.width <= 256 && texture.height <= 256)
                importer.maxTextureSize = 256;
            else if (texture.width <= 512 && texture.height <= 512)
                importer.maxTextureSize = 512;
            else if (texture.width <= 1024 && texture.height <= 1024)
                importer.maxTextureSize = 1024;
            else if (texture.width <= 2048 && texture.height <= 2048)
                importer.maxTextureSize = 2048;
            else if (texture.width <= 4096 && texture.height <= 4096)
                importer.maxTextureSize = 4096;
            else if (texture.height <= 8192 && texture.height <= 8192)
                importer.maxTextureSize = 8192;
            else
                importer.maxTextureSize = 16384;

            Object asset = AssetDatabase.LoadAssetAtPath(importer.assetPath, typeof(Texture2D));
            if (asset)
            {
                EditorUtility.SetDirty(asset);
            }
            else
            {
                texture.anisoLevel = 0;
                texture.filterMode = FilterMode.Point;
            }
        }
    }
}