(Legacy): bunch of formats.

(GSX): K5 archives + K4 images.
(HyperWorks): G images.
(IDA): better support packed entries.
(Logg): ARF, MBM archives, FRM images.
(Omi): DAT archives.
(Rare): X archives.
(RHSS): 'CRG' archives.
(SplushWave): better SWG images support.

Legacy/Logg/ImageFRM.cs

@@ -0,0 +1,63 @@
+//! \file       ImageFRM.cs
+//! \date       2023 Sep 03
+//! \brief      Logg image file.
+//
+// Copyright (C) 2023 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.Logg
+{
+    [Export(typeof(ImageFormat))]
+    public class FrmFormat : ImageFormat
+    {
+        public override string         Tag { get => "FRM"; }
+        public override string Description { get => "Logg image format"; }
+        public override uint     Signature { get => 0x4D5246; } // 'FRM'
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (0x10);
+            return new ImageMetaData {
+                Width  = header.ToUInt32 (4),
+                Height = header.ToUInt32 (8),
+                BPP = 8,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            file.Position = 0x0C;
+            int stride = file.ReadInt32();
+            var palette = ReadPalette (file.AsStream);
+            var pixels = file.ReadBytes (stride * info.iHeight);
+            return ImageData.Create (info, PixelFormats.Indexed8, palette, pixels, stride);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("FrmFormat.Write not implemented");
+        }
+    }
+}