implemented 'GameSystem' ALP masks.

ArcFormats/GameSystem/ImageALP.cs

@@ -0,0 +1,66 @@
+//! \file       ImageALP.cs
+//! \date       Thu Jan 19 21:19:47 2017
+//! \brief      'Game System' grayscale image format.
+//
+// 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;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.GameSystem
+{
+    [Export(typeof(ImageFormat))]
+    public class AlpFormat : ImageFormat
+    {
+        public override string         Tag { get { return "ALP/GAMESYSTEM"; } }
+        public override string Description { get { return "'Game System' grayscale image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.EndsWith (".alp", StringComparison.InvariantCultureIgnoreCase))
+                return null;
+            var header = file.ReadHeader (8);
+            uint width = header.ToUInt32 (0);
+            uint height = header.ToUInt32 (4);
+            if (0 == width || 0 == height)
+                return null;
+            if (file.Length != 8 + width * height)
+                return null;
+            return new ImageMetaData { Width = width, Height = height, BPP = 8 };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            file.Position = 8;
+            var pixels = file.ReadBytes ((int)info.Width * (int)info.Height);
+            return ImageData.Create (info, PixelFormats.Gray8, null, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("AlpFormat.Write not implemented");
+        }
+    }
+}