implemented MNG images.

ArcFormats/ArcFormats.csproj

@@ -128,8 +128,10 @@
     <Compile Include="Ikura\ImageGGS.cs" />
     <Compile Include="Ikura\ImageTAN.cs" />
     <Compile Include="Ikura\ImageVRS.cs" />
+    <Compile Include="ImageMNG.cs" />
     <Compile Include="Lambda\ArcLAX.cs" />
     <Compile Include="Lambda\ImageCLS.cs" />
+    <Compile Include="Lilim\ImageIMG.cs" />
     <Compile Include="Maika\ArcBK.cs" />
     <Compile Include="Nekopunch\ImagePBM.cs" />
     <Compile Include="Nexas\ArcTPF.cs" />

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;
+    }
+
+    /// <summary>
+    /// MNG may contain multiple frames, only the first one is loaded here.
+    /// </summary>
+    [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<Entry>();
+                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<ImageFormat> s_MngFormat = new ResourceInstance<ImageFormat> ("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
+    }
+}