quickly generate img.xens for GH3 / exe: https://cdn.discordapp.com/attachments/856787555348774922/967998812784324708/imggen.exe

imggen.cs

/*
 * Created by SharpDevelop.
 * User: Wesley
 * Date: 4/20/2022
 * Time: 6:04 PM
 */
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using DDS;
using System.Drawing;

namespace imggen
{
	class Program
	{
		private static BinaryWriter img;

		public static byte[] STH(string hex)
		{
			List<byte> list = new List<byte>();
			for (int i = 0; i < hex.Length - 1; i += 2)
			{
				list.Add(byte.Parse(hex.Substring(i, 2), NumberStyles.HexNumber));
			}
			return list.ToArray();
		}
		
		public static uint[] crctable = new uint[256];
		
		public static void initCRC32()
		{
			uint crc, poly = 0xEDB88320;
			for (uint i = 0; i < 256; i++)
			{
				crc = i;
				for (int j = 0; j < 8; j++)
				{
					if ((crc & 1) == 1)
						crc = crc >> 1 ^ poly;
					else
						crc >>= 1;
				}
				crctable[i] = crc;
			}
		}
		public static uint crc32(string text)
		{
			if (text.Length == 8)
				try {
					byte[] alreadykey = STH(text);
					Array.Reverse(alreadykey);
					return BitConverter.ToUInt32(alreadykey, 0);
				}
				catch
				{

				}
			uint crc = 0xFFFFFFFF;
			int len = text.Length;
			for (uint i = 0; i < len; i++)
			{
				crc = crc >> 8 & 0x00FFFFFF ^ crctable[(crc ^ text.ToCharArray()[i]) & 0xFF];
			}
			return crc;
		}
		
		public static void ToIMG(string fname)
		{
			byte[] imagebytes = new byte[0];
			Image image = null;
			DDSImage dds = new DDSImage();
			if (Path.GetExtension(fname) != ".dds")
			{
				imagebytes = File.ReadAllBytes(fname);
				image = Image.FromFile(fname);
			}
			else
			{
				imagebytes = File.ReadAllBytes(fname);
				dds = DDSImage.Load(imagebytes);
			}
			uint crcname = crc32(Path.GetFileNameWithoutExtension(fname));
			img = new BinaryWriter(File.OpenWrite(Path.GetDirectoryName(fname) + '\\' + crcname.ToString("X8") + ".img.xen"));
			img.Write(STH("0A281100"));
			img.Write(0);
			if (Path.GetExtension(fname) != ".dds")
			{
				img.Write(STH(image.Width.ToString("X4")));
				img.Write(STH(image.Height.ToString("X4")));
				img.Write(STH("0001"));
				img.Write(STH(image.Width.ToString("X4")));
				img.Write(STH(image.Height.ToString("X4")));
			}
			else
			{
				img.Write(STH(dds.Header.dwWidth.ToString("X4")));
				img.Write(STH(dds.Header.dwHeight.ToString("X4")));
				img.Write(STH("0001"));
				img.Write(STH(dds.Header.dwWidth.ToString("X4")));
				img.Write(STH(dds.Header.dwHeight.ToString("X4")));
			}
			//img.Write(STH(dds.Header.dwMipMapCount.ToString("X2"))); // dont know where this value is
			//img.Write(STH("00"));
			img.Write(STH("00010108050000000000"));
			//			     ^ ^
			// forgot where it is but its here somewhere
			// who uses mipmaps anyway
			int imageoffset = 0x28;
			int imagelength = imagebytes.Length;
			img.Write(STH(imageoffset.ToString("X8")));
			img.Write(STH(imagelength.ToString("X8")));
			img.Write(STH("00000000"));
			img.Write(imagebytes);
			img.Close();
		}

		public static void Main(string[] args)
		{
			if (args.Length == 0)
			{
				Console.WriteLine("imggen, another lazy\n\nimggen.exe [dds file]+\noutput: (CRC of filename).img.xen\n");
			}
			else
			{
				initCRC32();
				foreach (string a in args)
				{
					string dir = Path.GetDirectoryName(a);
					if (dir == string.Empty)
						dir = Directory.GetCurrentDirectory();
					foreach (string f in Directory.GetFiles(dir, Path.GetFileName(a)))
					{
						Console.WriteLine("Processing " + f + "...");
						ToIMG(f);
					}
				}
				Console.WriteLine("Done");
			}
		}
	}
}

and YES, it support PNGs
thanks aspyr
my brain was btfo when i was shown this was possible