(Legacy): Electriciteit resource archive.

Legacy/Electriciteit/ArcDAT.cs

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+//! \file       ArcDAT.cs
+//! \date       2018 Jun 08
+//! \brief      Electriciteit resource 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;
+
+// [010511][e-Erekiteru] Silence ~Seinaru Yoru no Kane no Naka de...~
+
+namespace GameRes.Formats.Electriciteit
+{
+    [Export(typeof(ArchiveFormat))]
+    public class DatOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "DAT/electr"; } }
+        public override string Description { get { return "Electriciteit resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.Name.HasExtension (".dat"))
+                return null;
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count))
+                return null;
+            bool is_bitmap = Path.GetFileNameWithoutExtension (file.Name).StartsWith ("b");
+            uint index_offset = 4;
+            uint first_offset = index_offset + (uint)count * 0x2C;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, 0x10);
+                if (!IsValidEntryName (name))
+                    return null;
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = file.View.ReadUInt32 (index_offset+0x24);
+                entry.Size   = file.View.ReadUInt32 (index_offset+0x28);
+                if (entry.Offset < first_offset || !entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                if (is_bitmap)
+                    entry.Type = "image";
+                dir.Add (entry);
+                index_offset += 0x2C;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
+        {
+            if (arc.File.View.ReadUInt16 (entry.Offset) != 0xB2BD) // ~'BM'
+                return base.OpenImage (arc, entry);
+            Stream input = arc.File.CreateStream (entry.Offset+2, entry.Size-2);
+            input = new PrefixStream (BitmapHeader, input);
+            var bitmap = new BinaryStream (input, entry.Name);
+            try
+            {
+                return new ImageFormatDecoder (bitmap);
+            }
+            catch
+            {
+                bitmap.Dispose();
+                throw;
+            }
+        }
+
+        static readonly byte[] BitmapHeader = new byte[] { (byte)'B', (byte)'M' };
+    }
+}