diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index e949d727..6e241961 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -124,6 +124,7 @@
+
diff --git a/ArcFormats/Masys/ImageALP.cs b/ArcFormats/Masys/ImageALP.cs
new file mode 100644
index 00000000..1a85b5a0
--- /dev/null
+++ b/ArcFormats/Masys/ImageALP.cs
@@ -0,0 +1,96 @@
+//! \file ImageALP.cs
+//! \date 2017 Nov 21
+//! \brief Masys Enhanced Game Unit alpha channel bitmap.
+//
+// Copyright (C) 2017 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.Megu
+{
+ internal class AlpMetaData : ImageMetaData
+ {
+ public uint UnpackedSize;
+ }
+
+ [Export(typeof(ImageFormat))]
+ public class AlpFormat : ImageFormat
+ {
+ public override string Tag { get { return "ALP/MEGU"; } }
+ public override string Description { get { return "Masys alpha channel bitmap"; } }
+ public override uint Signature { get { return 0x64504C41; } } // 'ALPd'
+
+ public override ImageMetaData ReadMetaData (IBinaryStream file)
+ {
+ var header = file.ReadHeader (0x15);
+ if (header[4] != 0)
+ return null;
+ return new AlpMetaData {
+ Width = header.ToUInt32 (5),
+ Height = header.ToUInt32 (9),
+ BPP = 8,
+ UnpackedSize = header.ToUInt32 (0x11),
+ };
+ }
+
+ public override ImageData Read (IBinaryStream file, ImageMetaData info)
+ {
+ var meta = (AlpMetaData)info;
+ file.Position = 0x15;
+ var pixels = Unpack (file, meta.UnpackedSize);
+ return ImageData.Create (info, PixelFormats.Gray8, null, pixels);
+ }
+
+ public override void Write (Stream file, ImageData image)
+ {
+ throw new System.NotImplementedException ("AlpFormat.Write not implemented");
+ }
+
+ byte[] Unpack (IBinaryStream input, uint unpacked_size)
+ {
+ var output = new byte[unpacked_size];
+ int dst = 0;
+ while (dst < output.Length)
+ {
+ int ctl = input.ReadByte();
+ if (-1 == ctl)
+ break;
+ byte val = (byte)((ctl & 0x7F) * 0xFF / 0x40);
+ if (0 != (ctl & 0x80))
+ {
+ int count = input.ReadUInt16();
+ for (int i = 0; i < count; ++i)
+ {
+ output[dst++] = val;
+ }
+ }
+ else
+ {
+ output[dst++] = val;
+ }
+ }
+ return output;
+ }
+ }
+}