implemented AXR archives and ZAW images.

ArcFormats/ArcFormats.csproj

@@ -327,6 +327,8 @@
     <Compile Include="BlackCyc\ArcVPK.cs" />
     <Compile Include="Vitamin\ImageMFC.cs" />
     <Compile Include="Vitamin\ImageSBI.cs" />
+    <Compile Include="VnEngine\ArcAXR.cs" />
+    <Compile Include="VnEngine\ImageZAW.cs" />
     <Compile Include="WebP\Alpha.cs" />
     <Compile Include="WebP\Decoder.cs">
       <SubType>Code</SubType>

ArcFormats/VnEngine/ArcAXR.cs

@@ -0,0 +1,179 @@
+//! \file       ArcAXR.cs
+//! \date       Fri Jul 01 13:43:07 2016
+//! \brief      GEM/vnengine resource archive.
+//
+// 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 GameRes.Utility;
+
+namespace GameRes.Formats.VnEngine
+{
+    internal class AxrArchive : ArcFile
+    {
+        public readonly byte[]  KeyTable = new byte[0x400];
+
+        public AxrArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, uint key)
+            : base (arc, impl, dir)
+        {
+            AxrOpener.Decrypt (KeyTable, key, 0x400);
+        }
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class AxrOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "AXR"; } }
+        public override string Description { get { return "GEM/vnengine resource archive"; } }
+        public override uint     Signature { get { return 0x65525841; } } // 'AXRe'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            var header = file.View.ReadBytes (0, 0x10);
+            byte checksum = header[4];
+            for (int i = 1; i < 8; ++i)
+            {
+                checksum ^= Binary.RotByteR (header[4+i], i);
+            }
+            uint t = MutateKey (MutateKey (LittleEndian.ToUInt32 (header, 8) ^ LittleEndian.ToUInt32 (header, 0)));
+            uint key = LittleEndian.ToUInt32 (header, 4);
+            uint index_size = t ^ key;
+            uint stored_checksum = LittleEndian.ToUInt32 (header, 12) ^ MutateKey (t);
+            if (index_size < 8 || checksum != stored_checksum)
+                return null;
+            var index = new byte[(index_size + 4) & ~3u];
+            if (index_size != file.View.Read (0x10, index, 0, index_size))
+                return null;
+            Decrypt (index, index_size, index.Length);
+            index[index_size] = 0;
+            var dir = new List<Entry>();
+            int current_offset = 0;
+            while (current_offset+8 < (int)index_size)
+            {
+                uint offset = LittleEndian.ToUInt32 (index, current_offset);
+                uint size   = LittleEndian.ToUInt32 (index, current_offset+4);
+                current_offset += 8;
+                int name_end = Array.IndexOf<byte> (index, 0, current_offset);
+                int name_length = name_end - current_offset;
+                if (0 == name_length)
+                    break;
+                var name = Encodings.cp932.GetString (index, current_offset, name_length);
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = offset;
+                entry.Size   = size;
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                current_offset += (name_length + 4) & -4;
+            }
+            if (0 == dir.Count)
+                return null;
+            return new AxrArchive (file, this, dir, key);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            var axr = arc as AxrArchive;
+            if (null == axr)
+                return input;
+            return new AxrEncryptedStream (input, axr.KeyTable);
+        }
+
+        static uint MutateKey (uint key)
+        {
+            key ^= (key & 0xFFF) << 17;
+            return ~(key ^ (key << 18 | key >> 15));
+        }
+
+        internal static void Decrypt (byte[] data, uint key, int count)
+        {
+            if (count > data.Length)
+                throw new ArgumentException ("count");
+            count /= 4;
+            if (0 == count)
+                return;
+            unsafe
+            {
+                fixed (byte* data8 = data)
+                {
+                    uint* data32 = (uint*)data8;
+                    for (int i = 0; i < count; ++i)
+                    {
+                        key = MutateKey (key);
+                        uint v = *data32 ^ key;
+                        *data32++ = v;
+                        key += v;
+                    }
+                }
+            }
+        }
+    }
+
+    internal class AxrEncryptedStream : ProxyStream
+    {
+        byte[]  m_key;
+
+        public AxrEncryptedStream (Stream input, byte[] key, bool leave_open = false)
+            : base (input, leave_open)
+        {
+            m_key = key;
+        }
+
+        public override bool CanWrite { get { return false; } }
+
+        public override int Read (byte[] buffer, int offset, int count)
+        {
+            int start = (int)Position;
+            int read = BaseStream.Read (buffer, offset, count);
+            for (int i = 0; i < read; ++i)
+            {
+                buffer[offset+i] ^= m_key[start++ & 0x3FF];
+            }
+            return read;
+        }
+
+        public override int ReadByte ()
+        {
+            int start = (int)Position & 0x3FF;
+            int b = BaseStream.ReadByte();
+            if (-1 != b)
+                b ^= m_key[start];
+            return b;
+        }
+
+        public override void Write (byte[] buffer, int offset, int count)
+        {
+            throw new NotSupportedException ("AxrEncryptedStream.Write method is not supported");
+        }
+
+        public override void WriteByte (byte value)
+        {
+            throw new NotSupportedException ("AxrEncryptedStream.WriteByte method is not supported");
+        }
+    }
+}

ArcFormats/VnEngine/ImageZAW.cs

@@ -0,0 +1,105 @@
+//! \file       ImageZAW.cs
+//! \date       Fri Jul 01 18:22:28 2016
+//! \brief      GEM/vnengine image format.
+//
+// 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using GameRes.Compression;
+using GameRes.Utility;
+
+namespace GameRes.Formats.VnEngine
+{
+    [Export(typeof(ImageFormat))]
+    public class ZawFormat : ImageFormat
+    {
+        public override string         Tag { get { return "ZAW"; } }
+        public override string Description { get { return "GEM/vnengine image format"; } }
+        public override uint     Signature { get { return 0x57415A; } } // 'ZAW'
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            var header = new byte[0x40];
+            if (header.Length != stream.Read (header, 0, header.Length))
+                return null;
+            uint crc = LittleEndian.ToUInt32 (header, 4);
+            LittleEndian.Pack (0u, header, 4);
+            if (crc != Crc32.Compute (header, 0, header.Length))
+                return null;
+            int bpp = 3 == header[12] ? 32
+                    : 2 == header[12] ? 16
+                    : 1 == header[12] ? 24 : 8;
+            return new ImageMetaData
+            {
+                Width   = LittleEndian.ToUInt32 (header, 0x10),
+                Height  = LittleEndian.ToUInt32 (header, 0x14),
+                OffsetX = LittleEndian.ToInt32  (header, 0x18),
+                OffsetY = LittleEndian.ToInt32  (header, 0x1C),
+                BPP     = bpp,
+            };
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            int pixel_size = info.BPP / 8;
+            int stride = (int)info.Width * pixel_size;
+            var pixels = new byte[stride * (int)info.Height];
+            stream.Position = 0x40;
+            using (var input = new ZLibStream (stream, CompressionMode.Decompress, true))
+                input.Read (pixels, 0, pixels.Length);
+            if (24 == info.BPP)
+                return ImageData.Create (info, PixelFormats.Rgb24, null, pixels, stride);
+            if (8 == info.BPP)
+                return ImageData.Create (info, PixelFormats.Gray8, null, pixels, stride);
+            if (16 == info.BPP)
+                return GrayWithAlpha (info, pixels);
+            for (int i = 0; i < pixels.Length; i += pixel_size)
+            {
+                byte t = pixels[i];
+                pixels[i] = pixels[i+2];
+                pixels[i+2] = t;
+                pixels[i+3] = (byte)System.Math.Min (pixels[i+3] * 0xFF / 0x80, 0xFF);
+            }
+            return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, stride);
+        }
+
+        ImageData GrayWithAlpha (ImageMetaData info, byte[] input)
+        {
+            int stride = (int)info.Width * 4;
+            byte[] pixels = new byte[stride * info.Height];
+            int src = 0;
+            for (int dst = 0; dst < pixels.Length; dst += 4)
+            {
+                pixels[dst] = pixels[dst+1] = pixels[dst+2] = input[src++];
+                pixels[dst+3] = (byte)System.Math.Min (input[src++] * 0xFF / 0x80, 0xFF);
+            }
+            return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, stride);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("ZawFormat.Write not implemented");
+        }
+    }
+}

supported.html

@@ -922,6 +922,10 @@ Peropero Saimin 3 Raouden ~Yousei no Sakuryaku~<br/>
 <tr class="odd"><td>*.gxp</td><td><tt>GXP</tt></td><td>No</td><td>Astronauts</td><td>
 Demonion 2 ~Maou to Sannin no Joou~<br/>
 </td></tr>
+<tr><td>*.axr</td><td><tt>AXRe</tt></td><td>No</td><td rowspan="2">GEM/vnengine</td><td rowspan="2">
+Natsunone -Ring-<br/>
+</td></tr>
+<tr><td>*.zaw</td><td><tt>ZAW</tt></td><td>No</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>