implemented D.O.'s VRS, GGA and GGS images.

ArcFormats/ArcFormats.csproj

@@ -123,6 +123,11 @@
     <Compile Include="elf\ArcAi5DAT.cs" />
     <Compile Include="elf\ImageRMT.cs" />
     <Compile Include="HuffmanCompression.cs" />
+    <Compile Include="Ikura\ArcTAN.cs" />
+    <Compile Include="Ikura\ImageGGA.cs" />
+    <Compile Include="Ikura\ImageGGS.cs" />
+    <Compile Include="Ikura\ImageTAN.cs" />
+    <Compile Include="Ikura\ImageVRS.cs" />
     <Compile Include="Lambda\ArcLAX.cs" />
     <Compile Include="Lambda\ImageCLS.cs" />
     <Compile Include="Maika\ArcBK.cs" />

ArcFormats/Ikura/ArcDRS.cs

@@ -45,7 +45,7 @@ namespace GameRes.Formats.Ikura
 
         public DrsOpener ()
         {
-            Extensions = Enumerable.Empty<string>(); // DRS archives have no extensions
+            Extensions = new string[] { "", "dat", "snr" };
         }
 
         public override ArcFile TryOpen (ArcView file)
@@ -56,7 +56,7 @@ namespace GameRes.Formats.Ikura
             if (dir_size < 0x20 || 0 != (dir_size & 0xf) || dir_size + 2 >= file.MaxOffset)
                 return null;
             byte first = file.View.ReadByte (2);
-            if (0 == first)
+            if (first <= 0x20)
                 return null;
             file.View.Reserve (0, (uint)dir_size + 2);
             int dir_offset = 2;
@@ -64,25 +64,19 @@ namespace GameRes.Formats.Ikura
             uint next_offset = file.View.ReadUInt32 (dir_offset+12);
             if (next_offset > file.MaxOffset || next_offset < dir_size+2)
                 return null;
-            var encoding = Encodings.cp932.WithFatalFallback();
-            byte[] name_raw = new byte[12];
 
             int count = dir_size / 0x10 - 1;
             var dir = new List<Entry> (count);
             for (int i = 0; i < count; ++i)
             {
-                file.View.Read (dir_offset, name_raw, 0, 12);
+                var name = file.View.ReadString (dir_offset, 12);
-                int name_length = name_raw.Length;
+                if (string.IsNullOrEmpty (name))
-                while (name_length > 0 && 0 == name_raw[name_length-1])
-                    --name_length;
-                if (0 == name_length)
                     return null;
                 uint offset = next_offset;
                 dir_offset += 0x10;
                 next_offset = file.View.ReadUInt32 (dir_offset+12);
                 if (next_offset > file.MaxOffset || next_offset < offset)
                     return null;
-                string name = encoding.GetString (name_raw, 0, name_length).ToLowerInvariant();
                 var entry = FormatCatalog.Instance.Create<Entry> (name);
                 entry.Offset = offset;
                 entry.Size = next_offset - offset;
@@ -138,21 +132,16 @@ namespace GameRes.Formats.Ikura
             uint index_size = file.View.ReadUInt32 (12);
             if (index_size > file.MaxOffset)
                 return null;
-            var encoding = Encodings.cp932.WithFatalFallback();
-            byte[] name_raw = new byte[12];
 
             long dir_offset = 0x20;
             var dir = new List<Entry> (count);
             bool has_scripts = false;
             for (int i = 0; i < count; ++i)
             {
-                file.View.Read (dir_offset, name_raw, 0, 12);
+                var name = file.View.ReadString (dir_offset, 12);
-                int name_length = name_raw.Length;
+                if (string.IsNullOrEmpty (name))
-                while (name_length > 0 && 0 == name_raw[name_length-1])
-                    --name_length;
-                if (0 == name_length)
                     return null;
-                string name = encoding.GetString (name_raw, 0, name_length).ToLowerInvariant();
+                name = name.ToLowerInvariant();
                 Entry entry;
                 if (name.EndsWith (".isf") || name.EndsWith (".snr"))
                 {

ArcFormats/Ikura/ArcTAN.cs

@@ -0,0 +1,128 @@
+//! \file       ArcTAN.cs
+//! \date       2018 Jan 16
+//! \brief      D.O. animation resource 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;
+
+
+namespace GameRes.Formats.Ikura
+{
+    internal class TanEntry : Entry
+    {
+        public int  Index;
+    }
+
+    internal class TanArchive : ArcFile
+    {
+        public readonly TanMetaData Info;
+
+        public TanArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, TanMetaData info)
+            : base (arc, impl, dir)
+        {
+            Info = info;
+        }
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class TanOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "TAN/DO"; } }
+        public override string Description { get { return "D.O. animation resource"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.Name.HasExtension (".tan"))
+                return null;
+            int count = file.View.ReadInt16 (0);
+            if (!IsSaneCount (count))
+                return null;
+            uint index_pos = 2 + (uint)count * 4;
+            var info = new TanMetaData {
+                Width  = file.View.ReadUInt16 (index_pos),
+                Height = file.View.ReadUInt16 (index_pos+2),
+                DataOffset = index_pos + 4,
+            };
+            index_pos += 0x404;
+            count = file.View.ReadInt16 (index_pos);
+            if (!IsSaneCount (count))
+                return null;
+            index_pos += 2;
+
+            var base_name = Path.GetFileNameWithoutExtension (file.Name);
+            var base_offset = index_pos + 4 * count;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var entry = new TanEntry {
+                    Name = string.Format ("{0}#{1:D2}", base_name, i),
+                    Type = "image",
+                    Offset = base_offset + file.View.ReadUInt32 (index_pos),
+                    Index = i,
+                };
+                dir.Add (entry);
+                index_pos += 4;
+            }
+            for (int i = 1; i < count; ++i)
+            {
+                dir[i-1].Size = (uint)(dir[i].Offset - dir[i-1].Offset);
+                if (!dir[i-1].CheckPlacement (file.MaxOffset))
+                    return null;
+            }
+            dir[dir.Count-1].Size = (uint)(file.MaxOffset - dir[dir.Count-1].Offset);
+            return new TanArchive (file, this, dir, info);
+        }
+
+        public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
+        {
+            var tarc = (TanArchive)arc;
+            var tent = (TanEntry)entry;
+            var input = arc.File.CreateStream();
+            return new TanFrameDecoder (input, tarc.Info, tent.Index);
+        }
+    }
+
+    internal class TanFrameDecoder : BinaryImageDecoder
+    {
+        int         m_frame;
+        TanReader   m_reader;
+
+        public TanFrameDecoder (IBinaryStream input, TanMetaData info, int frame)
+            : base (input, info)
+        {
+            m_frame = frame;
+            m_reader = new TanReader (m_input, info);
+        }
+
+        protected override ImageData GetImageData ()
+        {
+            var pixels = m_reader.UnpackFrame (m_frame);
+            return ImageData.Create (Info, m_reader.Format, m_reader.Palette, pixels);
+        }
+    }
+}

ArcFormats/Ikura/ImageDRG.cs

@@ -460,13 +460,13 @@ namespace GameRes.Formats.Ikura
     }
 
     [Export(typeof(ImageFormat))]
-    public class GgaFormat : ImageFormat
+    public class Gga0Format : ImageFormat
     {
         public override string         Tag { get { return "GG2"; } }
         public override string Description { get { return "IKURA GDL image format"; } }
         public override uint     Signature { get { return 0x30414747u; } } // 'GGA0'
 
-        public GgaFormat ()
+        public Gga0Format ()
         {
             Extensions = new string[] { "gg1", "gg2", "gg3", "gg0" };
         }

ArcFormats/Ikura/ImageGGA.cs

@@ -0,0 +1,81 @@
+//! \file       ImageGGA.cs
+//! \date       2018 Jan 16
+//! \brief      D.O. compressed image 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using GameRes.Compression;
+
+namespace GameRes.Formats.Ikura
+{
+    [Export(typeof(ImageFormat))]
+    public class GgaFormat : ImageFormat
+    {
+        public override string         Tag { get { return "GGA"; } }
+        public override string Description { get { return "D.O. image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        class GgaMetaData : ImageMetaData
+        {
+            public int  UnpackedSize;
+        }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension (".gga"))
+                return null;
+            int x = file.ReadInt16();
+            int y = file.ReadInt16();
+            uint w = file.ReadUInt16();
+            uint h = file.ReadUInt16();
+            int unpacked_size = file.ReadInt32();
+            if (0 == w || 0 == h || w > 0x7FFF || h > 0x7FFF || x < 0 || y < 0
+                || 3 * w * h != unpacked_size)
+                return null;
+            return new GgaMetaData {
+                Width = w, Height = h, OffsetX = x, OffsetY = y, BPP = 24,
+                UnpackedSize = unpacked_size,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var meta = (GgaMetaData)info;
+            file.Position = 12;
+            var pixels = new byte[meta.UnpackedSize];
+            using (var input = new LzssStream (file.AsStream, LzssMode.Decompress, true))
+            {
+                if (pixels.Length != input.Read (pixels, 0, pixels.Length))
+                    throw new InvalidFormatException();
+            }
+            return ImageData.Create (info, PixelFormats.Bgr24, null, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("GgaFormat.Write not implemented");
+        }
+    }
+}

ArcFormats/Ikura/ImageGGS.cs

@@ -0,0 +1,140 @@
+//! \file       ImageGGS.cs
+//! \date       2018 Jan 16
+//! \brief      D.O. compressed image 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.Ikura
+{
+    [Export(typeof(ImageFormat))]
+    public class GgsFormat : ImageFormat
+    {
+        public override string         Tag { get { return "GGS"; } }
+        public override string Description { get { return "D.O. image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension (".ggs"))
+                return null;
+            int x = file.ReadInt16();
+            int y = file.ReadInt16();
+            uint w = file.ReadUInt16();
+            uint h = file.ReadUInt16();
+            if (0 == w || 0 == h || w > 0x4000 || h > 0x4000 || x < 0 || y < 0)
+                return null;
+            return new ImageMetaData { Width = w, Height = h, OffsetX = x, OffsetY = y, BPP = 24 };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var reader = new GgsReader (file, info);
+            var pixels = reader.Unpack();
+            return ImageData.Create (info, reader.Format, null, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("GgsFormat.Write not implemented");
+        }
+    }
+
+    internal class GgsReader
+    {
+        IBinaryStream       m_input;
+        byte[]              m_output;
+
+        public PixelFormat Format { get { return PixelFormats.Bgr24; } }
+
+        public GgsReader (IBinaryStream input, ImageMetaData info)
+        {
+            m_input = input;
+            m_output = new byte[3 * info.Width * info.Height];
+        }
+
+        public byte[] Unpack ()
+        {
+            m_input.Position = 8;
+            for (int channel = 0; channel < 3; ++channel)
+            {
+                int dst = channel;
+                while (dst < m_output.Length)
+                {
+                    int count;
+                    byte ctl = m_input.ReadUInt8();
+                    if (0 == ctl--)
+                    {
+                        count = m_input.ReadUInt8();
+                        byte v = m_input.ReadUInt8();
+                        while (count --> 0)
+                        {
+                            m_output[dst] = v;
+                            dst += 3;
+                        }
+                    }
+                    else if (0 == ctl--)
+                    {
+                        count = m_input.ReadUInt8();
+                        int offset = m_input.ReadUInt8();
+                        while (count --> 0)
+                        {
+                            m_output[dst] = m_output[dst-offset];
+                            dst += 3;
+                        }
+                    }
+                    else if (0 == ctl--)
+                    {
+                        count = m_input.ReadUInt8();
+                        int offset = m_input.ReadUInt16();
+                        while (count --> 0)
+                        {
+                            m_output[dst] = m_output[dst-offset];
+                            dst += 3;
+                        }
+                    }
+                    else if (0 == ctl--)
+                    {
+                        dst += m_input.ReadUInt8();
+                    }
+                    else if (0 == ctl)
+                    {
+                        dst += m_input.ReadUInt16();
+                    }
+                    else
+                    {
+                        count = ctl;
+                        while (count --> 0)
+                        {
+                            m_output[dst] = m_input.ReadUInt8();
+                            dst += 3;
+                        }
+                    }
+                }
+            }
+            return m_output;
+        }
+    }
+}

ArcFormats/Ikura/ImageTAN.cs

@@ -0,0 +1,170 @@
+//! \file       ImageTAN.cs
+//! \date       2018 Jan 16
+//! \brief      D.O. animation resource 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;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Ikura
+{
+    internal class TanMetaData : ImageMetaData
+    {
+        public uint DataOffset;
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class TanFormat : ImageFormat
+    {
+        public override string         Tag { get { return "TAN"; } }
+        public override string Description { get { return "D.O. animation resource"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension (".tan"))
+                return null;
+            int count = file.ReadUInt16();
+            if (0 == count)
+                return null;
+            file.Position = 2 + count * 4;
+            uint w = file.ReadUInt16();
+            uint h = file.ReadUInt16();
+            if (0 == w || 0 == h)
+                return null;
+            return new TanMetaData {
+                Width = w, Height = h, BPP = 8,
+                DataOffset = (uint)file.Position,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var reader = new TanReader (file, (TanMetaData)info);
+            var pixels = reader.UnpackFrame (0);
+            return ImageData.Create (info, reader.Format, reader.Palette, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("TanFormat.Write not implemented");
+        }
+    }
+
+    internal class TanReader
+    {
+        IBinaryStream       m_input;
+        byte[]              m_output;
+        TanMetaData         m_info;
+
+        public PixelFormat    Format { get; private set; }
+        public BitmapPalette Palette { get; private set; }
+
+        public TanReader (IBinaryStream input, TanMetaData info)
+        {
+            m_input = input;
+            m_output = new byte[info.Width * info.Height];
+            m_info = info;
+            Format = 8 == m_info.BPP ? PixelFormats.Indexed8 : PixelFormats.Bgr24;
+        }
+
+        public byte[] UnpackFrame (int frame)
+        {
+            m_input.Position = m_info.DataOffset;
+            if (8 == m_info.BPP)
+                Palette = ImageFormat.ReadPalette (m_input.AsStream);
+            int count = m_input.ReadUInt16();
+            if (frame >= count)
+                throw new InvalidFormatException ("Not enough frames in TAN file.");
+            long base_pos = m_input.Position + 4 * count;
+            var frame_table = new uint[count];
+            for (int i = 0; i < count; ++i)
+                frame_table[i] = m_input.ReadUInt32();
+            Action Unpack;
+            if (8 == m_info.BPP)
+                Unpack = Unpack8bpp;
+            else
+                Unpack = Unpack24bpp;
+            for (int i = 0; i <= frame; ++i)
+            {
+                m_input.Position = base_pos + frame_table[i];
+                Unpack();
+            }
+            return m_output;
+        }
+
+        void Unpack8bpp ()
+        {
+            int dst = 0;
+            while (dst < m_output.Length)
+            {
+                int count;
+                byte ctl = m_input.ReadUInt8();
+                if (0 == ctl--)
+                {
+                    count = m_input.ReadUInt8();
+                    byte v = m_input.ReadUInt8();
+                    while (count --> 0)
+                        m_output[dst++] = v;
+                }
+                else if (0 == ctl--)
+                {
+                    count = m_input.ReadUInt8();
+                    int offset = m_input.ReadUInt8();
+                    Binary.CopyOverlapped (m_output, dst-offset, dst, count);
+                    dst += count;
+                }
+                else if (0 == ctl--)
+                {
+                    count = m_input.ReadUInt8();
+                    int offset = m_input.ReadUInt16();
+                    Binary.CopyOverlapped (m_output, dst-offset, dst, count);
+                    dst += count;
+                }
+                else if (0 == ctl--)
+                {
+                    dst += m_input.ReadUInt8();
+                }
+                else if (0 == ctl)
+                {
+                    dst += m_input.ReadUInt16();
+                }
+                else
+                {
+                    count = ctl;
+                    m_input.Read (m_output, dst, count);
+                    dst += count;
+                }
+            }
+        }
+
+        void Unpack24bpp ()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

ArcFormats/Ikura/ImageVRS.cs

@@ -0,0 +1,132 @@
+//! \file       ImageVRS.cs
+//! \date       2018 Jan 16
+//! \brief      D.O. image 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Ikura
+{
+    [Export(typeof(ImageFormat))]
+    public class DoFormat : ImageFormat
+    {
+        public override string         Tag { get { return "VRS/DO"; } }
+        public override string Description { get { return "D.O. image format"; } }
+        public override uint     Signature { get { return 0x4F44; } } // 'DO'
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (8);
+            return new ImageMetaData {
+                Width = header.ToUInt16 (4),
+                Height = header.ToUInt16 (6),
+                BPP = 8,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var reader = new DoReader (file, info);
+            reader.Unpack();
+            return ImageData.Create (info, reader.Format, reader.Palette, reader.Data);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("DoFormat.Write not implemented");
+        }
+    }
+
+    internal class DoReader
+    {
+        IBinaryStream       m_input;
+        byte[]              m_output;
+
+        public PixelFormat    Format { get; private set; }
+        public BitmapPalette Palette { get; private set; }
+        public byte[]           Data { get { return m_output; } }
+
+        public DoReader (IBinaryStream input, ImageMetaData info)
+        {
+            m_input = input;
+            m_output = new byte[info.Width * info.Height];
+            Format = PixelFormats.Indexed8;
+        }
+
+        public void Unpack ()
+        {
+            m_input.Position = 12;
+            Palette = ReadPalette();
+            int dst = 0;
+            while (dst < m_output.Length)
+            {
+                int count;
+                byte ctl = m_input.ReadUInt8();
+                if (0 == (ctl & 0xC0))
+                {
+                    count = ctl & 0x3F;
+                    if (0 == count)
+                        count = m_input.ReadUInt8() + 0x40;
+                    m_input.Read (m_output, dst, count);
+                }
+                else if (0 == (ctl & 0x80))
+                {
+                    count = ctl & 0x3F;
+                    if (0 == count)
+                        count = m_input.ReadUInt8() + 0x40;
+                    ++count;
+                    Binary.CopyOverlapped (m_output, dst-1, dst, count);
+                }
+                else
+                {
+                    int offset = (m_input.ReadUInt8() | (ctl & 0xF) << 8) + 1;
+                    count = (ctl >> 4) & 7;
+                    if (0 == count)
+                        count = m_input.ReadUInt8() + 8;
+                    count += 2;
+                    Binary.CopyOverlapped (m_output, dst-offset, dst, count);
+                }
+                dst += count;
+            }
+        }
+
+        BitmapPalette ReadPalette ()
+        {
+            var palette_data = m_input.ReadBytes (0x300);
+            if (palette_data.Length != 0x300)
+                throw new EndOfStreamException();
+            int src = 0;
+            var color_map = new Color[0x100];
+            for (int i = 0; i < 0x100; ++i)
+            {
+                color_map[i] = Color.FromRgb (palette_data[src+1], palette_data[src+2], palette_data[src]);
+                src += 3;
+            }
+            return new BitmapPalette (color_map);
+        }
+    }
+}