diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 4e4e0aef..7c3fd023 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -128,8 +128,10 @@
+
+
diff --git a/ArcFormats/ImageMNG.cs b/ArcFormats/ImageMNG.cs
new file mode 100644
index 00000000..d3698fdf
--- /dev/null
+++ b/ArcFormats/ImageMNG.cs
@@ -0,0 +1,217 @@
+//! \file ImageMNG.cs
+//! \date 2018 Jan 16
+//! \brief Multiple-image Network Graphics format.
+//
+// Copyright (C) 2018 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media.Imaging;
+using GameRes.Utility;
+
+namespace GameRes.Formats
+{
+ internal class MngMetaData : ImageMetaData
+ {
+ public long PngOffset;
+ }
+
+ ///
+ /// MNG may contain multiple frames, only the first one is loaded here.
+ ///
+ [Export(typeof(ImageFormat))]
+ public class MngFormat : ImageFormat
+ {
+ public override string Tag { get { return "MNG"; } }
+ public override string Description { get { return "Multiple-image Network Graphics"; } }
+ public override uint Signature { get { return 0x474E4D8A; } }
+
+ public override ImageMetaData ReadMetaData (IBinaryStream file)
+ {
+ var header = file.ReadHeader (8);
+ if (!header.AsciiEqual (4, "\x0D\x0A\x1A\x0A"))
+ return null;
+ uint chunk_size = Binary.BigEndian (file.ReadUInt32());
+ var chunk_type = file.ReadBytes (4);
+ if (!chunk_type.AsciiEqual ("MHDR"))
+ return null;
+ long chunk_pos = file.Position + chunk_size + 4;
+ var info = new MngMetaData { BPP = 32 };
+ info.Width = Binary.BigEndian (file.ReadUInt32());
+ info.Height = Binary.BigEndian (file.ReadUInt32());
+
+ for (;;)
+ {
+ file.Position = chunk_pos;
+ chunk_size = Binary.BigEndian (file.ReadUInt32());
+ file.Read (chunk_type, 0, 4);
+ if (Binary.AsciiEqual (chunk_type, "MEND") || Binary.AsciiEqual (chunk_type, "IEND"))
+ break;
+ if (Binary.AsciiEqual (chunk_type, "IHDR"))
+ {
+ info.PngOffset = chunk_pos;
+ break;
+ }
+ chunk_pos += chunk_size + 12;
+ }
+ if (0 == info.PngOffset)
+ return null;
+ return info;
+ }
+
+ internal static readonly byte[] PngHeader = { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };
+
+ public override ImageData Read (IBinaryStream file, ImageMetaData info)
+ {
+ var meta = (MngMetaData)info;
+ var body = new StreamRegion (file.AsStream, meta.PngOffset, true);
+ using (var png = new PrefixStream (PngHeader, body))
+ {
+ var decoder = new PngBitmapDecoder (png, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
+ var frame = decoder.Frames[0];
+ frame.Freeze();
+ return new ImageData (frame, info);
+ }
+ }
+
+ public override void Write (Stream file, ImageData image)
+ {
+ throw new System.NotImplementedException ("MngFormat.Write not implemented");
+ }
+ }
+
+ [Export(typeof(ArchiveFormat))]
+ public class MngOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "MNG"; } }
+ public override string Description { get { return "Multiple-image Network Graphics"; } }
+ public override uint Signature { get { return 0x474E4D8A; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanWrite { get { return false; } }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ using (var input = file.CreateStream())
+ {
+ var info = MngFormat.ReadMetaData (input) as MngMetaData;
+ if (null == info)
+ return null;
+ var base_name = Path.GetFileNameWithoutExtension (file.Name);
+ long chunk_pos = info.PngOffset;
+ var chunk_type = new byte[4];
+ long ihdr_pos = 0;
+ var dir = new List();
+ while (chunk_pos < file.MaxOffset)
+ {
+ input.Position = chunk_pos;
+ uint chunk_size = Binary.BigEndian (input.ReadUInt32());
+ input.Read (chunk_type, 0, 4);
+ if (Binary.AsciiEqual (chunk_type, "MEND"))
+ break;
+ if (Binary.AsciiEqual (chunk_type, "IHDR"))
+ {
+ ihdr_pos = chunk_pos;
+ }
+ else if (Binary.AsciiEqual (chunk_type, "IEND"))
+ {
+ if (0 == ihdr_pos) // IEND chunk without corresponding IHDR
+ return null;
+ var entry = new Entry {
+ Name = string.Format ("{0}#{1:D2}.png", base_name, dir.Count),
+ Type = "image",
+ Offset = ihdr_pos,
+ Size = (uint)(chunk_pos + chunk_size + 12 - ihdr_pos),
+ };
+ dir.Add (entry);
+ ihdr_pos = 0;
+ }
+ chunk_pos += chunk_size + 12;
+ }
+ if (0 == dir.Count)
+ return null;
+ return new ArcFile (file, this, dir);
+ }
+ }
+
+ public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
+ {
+ var input = arc.File.CreateStream (entry.Offset, entry.Size);
+ return new MngFrameDecoder (input);
+ }
+
+ ImageFormat MngFormat { get { return s_MngFormat.Value; } }
+
+ static readonly ResourceInstance s_MngFormat = new ResourceInstance ("MNG");
+ }
+
+ internal sealed class MngFrameDecoder : IImageDecoder
+ {
+ IBinaryStream m_input;
+ ImageData m_image;
+
+ public Stream Source { get { m_input.Position = 0; return m_input.AsStream; } }
+ public ImageFormat SourceFormat { get { return ImageFormat.Png; } }
+ public ImageMetaData Info { get; private set; }
+
+ public ImageData Image {
+ get {
+ if (null == m_image)
+ {
+ var decoder = new PngBitmapDecoder (Source, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
+ var frame = decoder.Frames[0];
+ frame.Freeze();
+ m_image = new ImageData (frame, Info);
+ }
+ return m_image;
+ }
+ }
+
+ public MngFrameDecoder (IBinaryStream input)
+ {
+ var png = new PrefixStream (MngFormat.PngHeader, input.AsStream);
+ m_input = new BinaryStream (png, input.Name);
+ try
+ {
+ Info = ImageFormat.Png.ReadMetaData (m_input);
+ if (null == Info)
+ throw new InvalidFormatException();
+ }
+ catch
+ {
+ m_input.Dispose();
+ }
+ }
+
+ #region IDisposable members
+ bool m_disposed = false;
+ public void Dispose ()
+ {
+ if (!m_disposed)
+ {
+ m_input.Dispose();
+ m_disposed = true;
+ }
+ }
+ #endregion
+ }
+}