implemented EME archives.

ArcFormats/ArcFormats.csproj

@@ -75,6 +75,8 @@
     <Compile Include="Cri\BigEndianReader.cs" />
     <Compile Include="Cri\ImageSPC.cs" />
     <Compile Include="Cri\ImageXTX.cs" />
+    <Compile Include="EmonEngine\ArcEME.cs" />
+    <Compile Include="EmonEngine\ImageBMP.cs" />
     <Compile Include="Entis\ErisaMatrix.cs" />
     <Compile Include="Hexenhaus\ArcARCC.cs" />
     <Compile Include="Hexenhaus\ArcODIO.cs" />

ArcFormats/EmonEngine/ArcEME.cs

@@ -0,0 +1,253 @@
+//! \file       ArcEME.cs
+//! \date       Tue Mar 15 08:13:00 2016
+//! \brief      Emon Engine (えもんエンジン) resource archives.
+//
+// Copyright (C) 2016 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Text;
+using GameRes.Compression;
+using GameRes.Utility;
+
+namespace GameRes.Formats.EmonEngine
+{
+    [Export(typeof(ArchiveFormat))]
+    public class EmeOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "EME"; } }
+        public override string Description { get { return "Emon Engine resource archive"; } } // 'えもんエンジン'
+        public override uint     Signature { get { return 0x44455252; } } // 'RREDATA'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "ATA "))
+                return null;
+            int count = file.View.ReadInt32 (file.MaxOffset-4);
+            if (!IsSaneCount (count))
+                return null;
+
+            uint index_size = (uint)count * 0x60;
+            var index_offset = file.MaxOffset - 4 - index_size;
+            var key = file.View.ReadBytes (index_offset - 40, 40);
+            var index = file.View.ReadBytes (index_offset, index_size);
+
+            int current_offset = 0;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                Decrypt (index, current_offset, 0x60, key);
+                var name = Binary.GetCString (index, current_offset, 0x40);
+                var entry = FormatCatalog.Instance.Create<EmEntry> (name);
+                entry.LzssFrameSize = LittleEndian.ToUInt16 (index, current_offset+0x40);
+                entry.LzssInitPos   = LittleEndian.ToUInt16 (index, current_offset+0x42);
+                if (entry.LzssFrameSize != 0)
+                    entry.LzssInitPos = (entry.LzssFrameSize - entry.LzssInitPos) % entry.LzssFrameSize;
+                entry.SubType       = LittleEndian.ToInt32  (index, current_offset+0x48);
+                entry.Size          = LittleEndian.ToUInt32 (index, current_offset+0x4C);
+                entry.UnpackedSize  = LittleEndian.ToUInt32 (index, current_offset+0x50);
+                entry.Offset        = LittleEndian.ToUInt32 (index, current_offset+0x54);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                if (3 == entry.SubType)
+                    entry.Type = "script";
+                else if (4 == entry.SubType)
+                    entry.Type = "image";
+                dir.Add (entry);
+                current_offset += 0x60;
+            }
+            return new EmeArchive (file, this, dir, key);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var ement = entry as EmEntry;
+            var emarc = arc as EmeArchive;
+            if (null == ement || null == emarc)
+                return base.OpenEntry (arc, entry);
+            if (3 == ement.SubType)
+                return OpenScript (emarc, ement);
+            else if (4 == ement.SubType)
+                return OpenImage (emarc, ement);
+            else if (5 == ement.SubType && entry.Size > 4)
+                return OpenT5 (emarc, ement);
+            else
+                return base.OpenEntry (arc, entry);
+        }
+
+        Stream OpenScript (EmeArchive arc, EmEntry entry)
+        {
+            var header = arc.File.View.ReadBytes (entry.Offset, 12);
+            Decrypt (header, 0, 12, arc.Key);
+            if (0 == entry.LzssFrameSize)
+            {
+                var input = arc.File.CreateStream (entry.Offset+12, entry.Size);
+                return new PrefixStream (header, input);
+            }
+            int unpacked_size = LittleEndian.ToInt32 (header, 4);
+            if (0 != unpacked_size)
+            {
+                uint packed_size = LittleEndian.ToUInt32 (header, 0);
+                int part1_size = (int)entry.UnpackedSize - unpacked_size;
+                var data = new byte[entry.UnpackedSize];
+                using (var input = arc.File.CreateStream (entry.Offset+12+packed_size, entry.Size))
+                using (var lzss = new LzssStream (input))
+                {
+                    lzss.Config.FrameSize = entry.LzssFrameSize;
+                    lzss.Config.FrameInitPos = entry.LzssInitPos;
+                    lzss.Read (data, 0, part1_size);
+                }
+                using (var input = arc.File.CreateStream (entry.Offset+12, packed_size))
+                using (var lzss = new LzssStream (input))
+                {
+                    lzss.Config.FrameSize = entry.LzssFrameSize;
+                    lzss.Config.FrameInitPos = entry.LzssInitPos;
+                    lzss.Read (data, part1_size, unpacked_size);
+                }
+                return new MemoryStream (data);
+            }
+            else
+            {
+                var input = arc.File.CreateStream (entry.Offset+12, entry.Size);
+                var lzss = new LzssStream (input);
+                lzss.Config.FrameSize = entry.LzssFrameSize;
+                lzss.Config.FrameInitPos = entry.LzssInitPos;
+                return lzss;
+            }
+        }
+
+        Stream OpenImage (EmeArchive arc, EmEntry entry)
+        {
+            var header = new byte[40];
+            Encoding.ASCII.GetBytes ("EMBM", 0, 4, header, 0);
+            LittleEndian.Pack ((ushort)entry.LzssFrameSize, header, 4);
+            LittleEndian.Pack ((ushort)entry.LzssInitPos, header, 6);
+            arc.File.View.Read (entry.Offset, header, 8, 32);
+            Decrypt (header, 8, 32, arc.Key);
+            uint entry_size = entry.Size;
+            uint colors = LittleEndian.ToUInt16 (header, 14);
+            if (0 != colors && header[0] != 7)
+                entry_size += Math.Max (colors, 3u) * 4;
+            var input = arc.File.CreateStream (entry.Offset+32, entry_size);
+            return new PrefixStream (header, input);
+        }
+
+        Stream OpenT5 (EmeArchive arc, EmEntry entry)
+        {
+            var header = arc.File.View.ReadBytes (entry.Offset, 4);
+            Decrypt (header, 0, 4, arc.Key);
+            var input = arc.File.CreateStream (entry.Offset+4, entry.Size-4);
+            return new PrefixStream (header, input);
+        }
+
+        internal static unsafe void Decrypt (byte[] buffer, int offset, int length, byte[] routine)
+        {
+            if (null == buffer)
+                throw new ArgumentNullException ("buffer", "Buffer cannot be null.");
+            if (offset < 0)
+                throw new ArgumentOutOfRangeException ("offset", "Buffer offset should be non-negative.");
+            if (buffer.Length - offset < length)
+                throw new ArgumentException ("Buffer offset and length are out of bounds.");
+            fixed (byte* data8 = &buffer[offset])
+            {
+                uint* data32 = (uint*)data8;
+                int length32 = length / 4;
+                int key_index = routine.Length;
+                for (int i = 7; i >= 0; --i)
+                {
+                    key_index -= 4;
+                    uint key = LittleEndian.ToUInt32 (routine, key_index);
+                    switch (routine[i])
+                    {
+                    case 1:
+                        for (int j = 0; j < length32; ++j)
+                            data32[j] ^= key;
+                        break;
+                    case 2:
+                        for (int j = 0; j < length32; ++j)
+                        {
+                            uint v = data32[j];
+                            data32[j] = v ^ key;
+                            key = v;
+                        }
+                        break;
+                    case 4:
+                        for (int j = 0; j < length32; ++j)
+                            data32[j] = ShiftValue (data32[j], key);
+                        break;
+                    case 8:
+                        InitTable (buffer, offset, length, key);
+                        break;
+                    }
+                }
+            }
+        }
+
+        static uint ShiftValue (uint val, uint key)
+        {
+            int shift = 0;
+            uint result = 0;
+            for (int i = 0; i < 32; ++i)
+            {
+                shift += (int)key;
+                result |= ((val >> i) & 1) << shift;
+            }
+            return result;
+        }
+
+        static void InitTable (byte[] buffer, int offset, int length, uint key)
+        {
+            var table = new byte[length];
+            int x = 0;
+            for (int i = 0; i < length; ++i)
+            {
+                x += (int)key;
+                while (x >= length)
+                    x -= length;
+                table[x] = buffer[offset+i];
+            }
+            Buffer.BlockCopy (table, 0, buffer, offset, length);
+        }
+    }
+
+    internal class EmEntry : PackedEntry
+    {
+        public int LzssFrameSize;
+        public int LzssInitPos;
+        public int SubType;
+    }
+
+    internal class EmeArchive : ArcFile
+    {
+        public readonly byte[] Key;
+
+        public EmeArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte[] key)
+            : base (arc, impl, dir)
+        {
+            Key = key;
+        }
+    }
+}

ArcFormats/EmonEngine/ImageBMP.cs

@@ -0,0 +1,134 @@
+//! \file       ImageBMP.cs
+//! \date       Wed Mar 16 01:08:47 2016
+//! \brief      Emon Engine compressed images.
+//
+// Copyright (C) 2016 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.Compression;
+
+namespace GameRes.Formats.EmonEngine
+{
+    internal class EmMetaData : ImageMetaData
+    {
+        public int Colors;
+        public int Stride;
+        public int LzssFrameSize;
+        public int LzssInitPos;
+        public int DataOffset;
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class EmFormat : ImageFormat
+    {
+        public override string         Tag { get { return "EM/BMP"; } }
+        public override string Description { get { return "Emon Engine image format"; } }
+        // this is an artificial prefix embedded into stream by EmeOpener.OpenImage
+        public override uint     Signature { get { return 0x4D424D45; } } // 'EMBM'
+
+        public EmFormat ()
+        {
+            Extensions = new string[] { "bmp" };
+        }
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            using (var reader = new ArcView.Reader (stream))
+            {
+                reader.ReadInt32();
+                var info = new EmMetaData();
+                info.LzssFrameSize = reader.ReadUInt16();
+                info.LzssInitPos = reader.ReadUInt16();
+                info.BPP = reader.ReadUInt16() & 0xFF;
+                info.Width = reader.ReadUInt16();
+                info.Height = reader.ReadUInt16();
+                info.Colors = reader.ReadUInt16();
+                info.Stride = reader.ReadInt32();
+                info.OffsetX = reader.ReadInt32();
+                info.OffsetY = reader.ReadInt32();
+                info.DataOffset = 40;
+                return info;
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            var meta = (EmMetaData)info;
+            stream.Position = meta.DataOffset;
+            BitmapPalette palette = null;
+            if (meta.Colors != 0)
+                palette = ReadPalette (stream, Math.Max (meta.Colors, 3));
+            var pixels = new byte[meta.Stride * (int)info.Height];
+            if (meta.LzssFrameSize != 0)
+            {
+                using (var lzss = new LzssStream (stream, LzssMode.Decompress, true))
+                {
+                    lzss.Config.FrameSize = meta.LzssFrameSize;
+                    lzss.Config.FrameInitPos = meta.LzssInitPos;
+                    if (pixels.Length != lzss.Read (pixels, 0, pixels.Length))
+                        throw new EndOfStreamException();
+                }
+            }
+            else
+            {
+                if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
+                    throw new EndOfStreamException();
+            }
+            if (7 == meta.BPP)
+                return ImageData.Create (info, PixelFormats.Gray8, palette, pixels, meta.Stride);
+
+            PixelFormat format;
+            if (32 == meta.BPP)
+                format = PixelFormats.Bgr32;
+            else if (24 == meta.BPP)
+                format = PixelFormats.Bgr24;
+            else
+                format = PixelFormats.Indexed8;
+            return ImageData.CreateFlipped (info, format, palette, pixels, meta.Stride);
+        }
+
+        BitmapPalette ReadPalette (Stream input, int colors)
+        {
+            int palette_size = colors * 4;
+            var palette_data = new byte[palette_size];
+            if (palette_size != input.Read (palette_data, 0, palette_size))
+                throw new InvalidFormatException();
+            var palette = new Color[colors];
+            int src = 0;
+            for (int i = 0; i < palette.Length; ++i)
+            {
+                palette[i] = Color.FromRgb (palette_data[src], palette_data[src+1], palette_data[src+2]);
+                src += 4;
+            }
+            return new BitmapPalette (palette);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("EmFormat.Write not implemented");
+        }
+    }
+}

supported.html

@@ -406,9 +406,10 @@ Yatohime Zankikou<br/>
 <tr class="odd"><td>*.arc+*.ari</td><td><tt>WFL1</tt></td><td>No</td><td rowspan="2">KaGuYa</td><td rowspan="2">
 Dungeon Crusaderz ~Tales of Demon Eater~<br/>
 Dungeon Crusaderz 2 ~Eigou no Rakudo~<br/>
-Onna Kyoushi<br/>
+Inkou Haden Amatsu ~Hakudaku no Juin~<br/>
 Magical Witch Academy<br/>
 Medorei ~Okasareta Houkago~<br/>
+Onna Kyoushi<br/>
 Saishuu Chikan Densha<br/>
 Serina<br/>
 Ura Nyuugaku ~Ineki ni Nureta Kyoukasho~<br/>
@@ -745,6 +746,9 @@ Angenehm Platz -Kleiner Garten Sie Erstellen-<br/>
 <tr class="odd"><td>*.arc</td><td><tt>ARCC</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.bin</td><td><tt>ODIO</tt></td><td>No</td></tr>
 </td></tr>
+<tr><td>*.eme</td><td><tt>RREDATA</tt></td><td>No</td><td>Emon Engine</td><td>
+Ase Nure Shoujo Misaki "Anata no Nioi de Icchau!"<br/>
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>