diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 7c3fd023..b459bf12 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -122,6 +122,7 @@
+
@@ -133,6 +134,7 @@
+
diff --git a/ArcFormats/Groover/ArcPCG.cs b/ArcFormats/Groover/ArcPCG.cs
new file mode 100644
index 00000000..6f4e1d85
--- /dev/null
+++ b/ArcFormats/Groover/ArcPCG.cs
@@ -0,0 +1,217 @@
+//! \file ArcPCG.cs
+//! \date 2018 Jan 20
+//! \brief Groover CG archive.
+//
+// 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Text.RegularExpressions;
+using System.Windows.Media;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Groover
+{
+ [Export(typeof(ArchiveFormat))]
+ public class DatOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "DAT/PCG"; } }
+ public override string Description { get { return "Groover resource archive"; } }
+ public override uint Signature { get { return 0; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanWrite { get { return false; } }
+
+ static readonly Regex IndexNameRe = new Regex (@"^((.+)0\d)\.dat$", RegexOptions.IgnoreCase);
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ if (!file.Name.HasExtension (".dat"))
+ return null;
+ var arc_name = Path.GetFileName (file.Name);
+ var match = IndexNameRe.Match (arc_name);
+ if (!match.Success)
+ return null;
+ var base_name = match.Groups[2].Value;
+ base_name = VFS.ChangeFileName (file.Name, base_name);
+ var index_name = base_name + ".pcg";
+ if (!VFS.FileExists (index_name))
+ {
+ index_name = base_name + ".spf";
+ if (!VFS.FileExists (index_name))
+ return null;
+ }
+ arc_name = match.Groups[1].Value;
+ using (var index = VFS.OpenView (index_name))
+ {
+ int parts_count = index.View.ReadInt32 (0);
+ int count = index.View.ReadInt32 (4);
+ if (parts_count > 10 || !IsSaneCount (count))
+ return null;
+ int entry_size = (int)(index.MaxOffset - 0x198) / count;
+ if (entry_size < 0x30)
+ return null;
+ int first_index = -1, last_index = -1;
+ for (int i = 0; i < parts_count; ++i)
+ {
+ int name_pos = 8 + i * 0x20;
+ var name = index.View.ReadString (name_pos, 0x20);
+ if (name == arc_name)
+ {
+ int first_index_pos = 0x148 + i * 4;
+ int last_index_pos = 0x170 + i * 4;
+ first_index = index.View.ReadInt32 (first_index_pos);
+ last_index = index.View.ReadInt32 (last_index_pos);
+ break;
+ }
+ }
+ if (first_index < 0 || first_index >= last_index || last_index > count)
+ return null;
+
+ uint name_size = entry_size >= 0x48 ? 0x40u : 0x20u;
+ int index_offset = 0x198 + entry_size * first_index;
+ var dir = new List (last_index-first_index);
+ for (int i = first_index; i < last_index; ++i)
+ {
+ var name = index.View.ReadString (index_offset, name_size);
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Size = index.View.ReadUInt32 (index_offset+name_size);
+ entry.Offset = index.View.ReadUInt32 (index_offset+name_size+4);
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ dir.Add (entry);
+ index_offset += entry_size;
+ }
+ return new ArcFile (file, this, dir);
+ }
+ }
+
+ public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
+ {
+ var input = arc.File.CreateStream (entry.Offset, entry.Size);
+ try
+ {
+ if (0x504D434E == input.Signature) // 'NCMP'
+ return new NcmpReader (input);
+ if (0x424352 == input.Signature) // 'RCB'
+ return new RcbReader (input);
+ return new ImageFormatDecoder (input);
+ }
+ catch
+ {
+ input.Dispose();
+ throw;
+ }
+ }
+ }
+
+ internal abstract class PcgReaderBase : IImageDecoder
+ {
+ protected IBinaryStream m_input;
+ private ImageData m_image;
+ protected int m_unpacked_size;
+ protected int m_packed_size;
+
+ public Stream Source { get { m_input.Position = 0; return m_input.AsStream; } }
+ public ImageFormat SourceFormat { get { return null; } }
+ public ImageMetaData Info { get; protected set; }
+ public PixelFormat Format { get { return PixelFormats.Bgr24; } }
+ public ImageData Image {
+ get {
+ if (null == m_image)
+ {
+ var pixels = Unpack();
+ m_image = ImageData.Create (Info, Format, null, pixels);
+ }
+ return m_image;
+ }
+ }
+
+ protected PcgReaderBase (IBinaryStream input)
+ {
+ m_input = input;
+ m_input.Position = 8;
+ uint w = m_input.ReadUInt32();
+ uint h = m_input.ReadUInt32();
+ m_unpacked_size = m_input.ReadInt32();
+ m_packed_size = m_input.ReadInt32();
+ Info = new ImageMetaData { Width = w, Height = h, BPP = 24 };
+ }
+
+ protected abstract byte[] Unpack ();
+
+ #region IDisposable Members
+ public void Dispose ()
+ {
+ Dispose (true);
+ GC.SuppressFinalize (this);
+ }
+
+ bool m_disposed = false;
+ protected virtual void Dispose (bool disposing)
+ {
+ if (!m_disposed)
+ {
+ m_input.Dispose();
+ m_disposed = true;
+ }
+ }
+ #endregion
+ }
+
+ internal class NcmpReader : PcgReaderBase
+ {
+ public NcmpReader (IBinaryStream input) : base (input) { }
+
+ protected override byte[] Unpack ()
+ {
+ m_input.Position = 0x18;
+ return m_input.ReadBytes (m_unpacked_size);
+ }
+ }
+
+ internal class RcbReader : PcgReaderBase
+ {
+ public RcbReader (IBinaryStream input) : base (input) { }
+
+ protected override byte[] Unpack ()
+ {
+ m_input.Position = 0x18;
+ var output = new byte[m_unpacked_size];
+ int src = 0;
+ int dst = 0;
+ while (src < m_packed_size && dst < m_unpacked_size)
+ {
+ m_input.Read (output, dst, 3);
+ int count = m_input.ReadUInt8();
+ if (count > 0)
+ {
+ if (count > 1)
+ Binary.CopyOverlapped (output, dst, dst+3, (count-1) * 3);
+ dst += count * 3;
+ }
+ }
+ return output;
+ }
+ }
+}