diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 20667ff3..a63c8b67 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -79,6 +79,8 @@
+
+
diff --git a/ArcFormats/Silky/ArcAi6Win.cs b/ArcFormats/Silky/ArcAi6Win.cs
new file mode 100644
index 00000000..bd97811d
--- /dev/null
+++ b/ArcFormats/Silky/ArcAi6Win.cs
@@ -0,0 +1,98 @@
+//! \file ArcAi6Win.cs
+//! \date Sat Nov 28 12:44:51 2015
+//! \brief Ai6Win engine resource archive
+//
+// Copyright (C) 2015 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 GameRes.Compression;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Silky
+{
+ [Export(typeof(ArchiveFormat))]
+ public class Ai6Opener : ArchiveFormat
+ {
+ public override string Tag { get { return "ARC/AI6WIN"; } }
+ public override string Description { get { return "AI6WIN engine resource archive"; } }
+ public override uint Signature { get { return 0; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanCreate { get { return false; } }
+
+ public Ai6Opener ()
+ {
+ Extensions = new string[] { "arc" };
+ }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ int count = file.View.ReadInt32 (0);
+ if (!IsSaneCount (count))
+ return null;
+ long index_offset = 4;
+ uint index_size = (uint)(count * (0x104 + 8));
+ if (index_size > file.View.Reserve (index_offset, index_size))
+ return null;
+ var name_buffer = new byte[0x104];
+ var dir = new List();
+ for (int i = 0; i < count; ++i)
+ {
+ file.View.Read (index_offset, name_buffer, 0, (uint)name_buffer.Length);
+ int name_length = 0;
+ while (name_length < name_buffer.Length && 0 != name_buffer[name_length])
+ ++name_length;
+ if (0 == name_length)
+ return null;
+ byte key = (byte)(name_length+1);
+ for (int j = 0; j < name_length; ++j)
+ {
+ name_buffer[j] -= key--;
+ if (name_buffer[j] < 0x20)
+ return null;
+ }
+ var name = Encodings.cp932.GetString (name_buffer, 0, name_length);
+ index_offset += 0x104;
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Size = Binary.BigEndian (file.View.ReadUInt32 (index_offset));
+ entry.UnpackedSize = Binary.BigEndian (file.View.ReadUInt32 (index_offset+4));
+ entry.Offset = Binary.BigEndian (file.View.ReadUInt32 (index_offset+8));
+ if (entry.Offset < index_size+4 || !entry.CheckPlacement (file.MaxOffset))
+ return null;
+ entry.IsPacked = entry.Size != entry.UnpackedSize;
+ dir.Add (entry);
+ index_offset += 12;
+ }
+ return new ArcFile (file, this, dir);
+ }
+
+ public override Stream OpenEntry (ArcFile arc, Entry entry)
+ {
+ var pent = entry as PackedEntry;
+ if (null == pent || !pent.IsPacked)
+ return base.OpenEntry (arc, entry);
+ var input = arc.File.CreateStream (entry.Offset, entry.Size);
+ return new LzssStream (input);
+ }
+ }
+}
diff --git a/ArcFormats/Silky/ImageAKB.cs b/ArcFormats/Silky/ImageAKB.cs
new file mode 100644
index 00000000..86ed4202
--- /dev/null
+++ b/ArcFormats/Silky/ImageAKB.cs
@@ -0,0 +1,139 @@
+//! \file ImageAKB.cs
+//! \date Sat Nov 28 13:09:20 2015
+//! \brief Ai6Win engine image format.
+//
+// Copyright (C) 2015 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 GameRes.Compression;
+using GameRes.Utility;
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.Silky
+{
+ internal class AkbMetaData : ImageMetaData
+ {
+ public byte[] Background;
+ public int InnerWidth;
+ public int InnerHeight;
+ }
+
+ [Export(typeof(ImageFormat))]
+ public class AkbFormat : ImageFormat
+ {
+ public override string Tag { get { return "AKB"; } }
+ public override string Description { get { return "AI6WIN engine image format"; } }
+ public override uint Signature { get { return 0x20424B41; } } // 'AKB '
+
+ public override ImageMetaData ReadMetaData (Stream stream)
+ {
+ using (var reader = new ArcView.Reader (stream))
+ {
+ reader.ReadInt32();
+ var info = new AkbMetaData();
+ info.Width = reader.ReadUInt16();
+ info.Height = reader.ReadUInt16();
+ int flags = reader.ReadInt32() & 0xFFFF;
+ info.BPP = 0 == flags ? 32 : 24;
+ info.Background = reader.ReadBytes (4);
+ info.OffsetX = reader.ReadInt32();
+ info.OffsetY = reader.ReadInt32();
+ info.InnerWidth = reader.ReadInt32() - info.OffsetX;
+ info.InnerHeight = reader.ReadInt32() - info.OffsetY;
+ if (info.InnerWidth > info.Width || info.InnerHeight > info.Height)
+ return null;
+ return info;
+ }
+ }
+
+ public override ImageData Read (Stream stream, ImageMetaData info)
+ {
+ var meta = (AkbMetaData)info;
+ int pixel_size = meta.BPP / 8;
+ int stride = (int)meta.Width * pixel_size;
+ byte[] image;
+ if (meta.InnerWidth != 0 && meta.InnerHeight != 0)
+ {
+ stream.Position = 0x20;
+ int inner_stride = meta.InnerWidth * pixel_size;
+ var pixels = new byte[meta.InnerHeight * inner_stride];
+ using (var lz = new LzssStream (stream, LzssMode.Decompress, true))
+ {
+ for (int dst = pixels.Length - inner_stride; dst >= 0; dst -= inner_stride)
+ {
+ if (inner_stride != lz.Read (pixels, dst, inner_stride))
+ throw new InvalidFormatException();
+ }
+ }
+ int src = 0;
+ for (int i = pixel_size; i < inner_stride; ++i)
+ pixels[i] += pixels[src++];
+ src = 0;
+ for (int i = inner_stride; i < pixels.Length; ++i)
+ pixels[i] += pixels[src++];
+ if (meta.InnerWidth != meta.Width || meta.InnerHeight != meta.Height)
+ {
+ image = CreateBackground (meta);
+ src = 0;
+ int dst = meta.OffsetY * stride + meta.OffsetX * pixel_size;
+ for (int y = 0; y < meta.InnerHeight; ++y)
+ {
+ Buffer.BlockCopy (pixels, src, image, dst, inner_stride);
+ dst += stride;
+ src += inner_stride;
+ }
+ }
+ else
+ {
+ image = pixels;
+ }
+ }
+ else
+ {
+ image = CreateBackground (meta);
+ }
+ var format = 24 == meta.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
+ return ImageData.Create (info, format, null, image, stride);
+ }
+
+ private byte[] CreateBackground (AkbMetaData info)
+ {
+ int pixel_size = info.BPP / 8;
+ int stride = (int)info.Width * pixel_size;
+ var pixels = new byte[stride * (int)info.Height];
+ if (0 != LittleEndian.ToInt32 (info.Background, 0))
+ {
+ for (int i = 0; i < stride; i += pixel_size)
+ Buffer.BlockCopy (info.Background, 0, pixels, i, pixel_size);
+ Binary.CopyOverlapped (pixels, 0, stride, pixels.Length-stride);
+ }
+ return pixels;
+ }
+
+ public override void Write (Stream file, ImageData image)
+ {
+ throw new System.NotImplementedException ("AkbFormat.Write not implemented");
+ }
+ }
+}
diff --git a/supported.html b/supported.html
index dee2ddaa..a7e3cbb3 100644
--- a/supported.html
+++ b/supported.html
@@ -533,6 +533,10 @@ Tama Tama ~Tonari no Kanojo...
Tama Tama Christmas Box
| *.mag | - | No |
+| *.arc | - | No | AI6WIN |
+Gakuen Saimin Reido
+ |
+| *.akb | AKB | No |
Non-encrypted only