implemented 'dif' incremental images.

ArcFormats/MnoViolet/ImageDIF.cs

@@ -0,0 +1,156 @@
+//! \file       ImageDIF.cs
+//! \date       Sun Mar 06 14:36:12 2016
+//! \brief      M no Violet engine diff images.
+//
+// Copyright (C) 2016 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.Linq;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using GameRes.Compression;
+using GameRes.Utility;
+
+namespace GameRes.Formats.MnoViolet
+{
+    internal class DifMetaData : ImageMetaData
+    {
+        public Entry            BaseEntry;
+        public ImageFormat      BaseFormat;
+        public ImageMetaData    BaseInfo;
+        public int              PackedIndexSize;
+        public int              IndexSize;
+        public int              PackedDiffSize;
+        public int              DiffDataSize;
+        public int              DiffCount;
+    }
+
+    /// <summary>
+    /// 'dif' files contain reference to an image they're based on and compressed difference data.
+    /// filename is specified without extension and base file usually resides within some other archive.
+    /// this implementation looks for the first file matching 'FILENAME.*' pattern within the same directory
+    /// as 'dif' itself and takes it as a base image.
+    /// so, both images and diff files should be placed into the same directory beforehand.
+    /// </summary>
+
+    [Export(typeof(ImageFormat))]
+    public class DifFormat : ImageFormat
+    {
+        public override string         Tag { get { return "DIF/MnV"; } }
+        public override string Description { get { return "M no Violet incremental image format"; } }
+        public override uint     Signature { get { return 0x00666964; } } // 'dif'
+
+        public DifFormat ()
+        {
+            Extensions = new string[] { "dif" };
+        }
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            var header = new byte[0x7C];
+            if (header.Length != stream.Read (header, 0, header.Length))
+                return null;
+            var base_name = Binary.GetCString (header, 4, 100);
+            if (string.IsNullOrEmpty (base_name))
+                return null;
+            var files = VFS.GetFiles (base_name+".*");
+            if (!files.Any())
+                return null;
+            var base_entry = files.First();
+            using (var input = VFS.OpenSeekableStream (base_entry))
+            {
+                // ReadMetaData isn't supplied with a filename being processed, so infinite recursion can't be
+                // prevented here unless we save state in a static member.
+                var format = ImageFormat.FindFormat (input, base_entry.Name);
+                if (null == format)
+                    return null;
+                format.Item2.FileName = base_entry.Name;
+                return new DifMetaData
+                {
+                    Width = format.Item2.Width,
+                    Height = format.Item2.Height,
+                    BPP = 24,
+                    BaseEntry = base_entry,
+                    BaseFormat = format.Item1,
+                    BaseInfo = format.Item2,
+                    PackedIndexSize = LittleEndian.ToInt32 (header, 0x68),
+                    IndexSize = LittleEndian.ToInt32 (header, 0x6C),
+                    PackedDiffSize = LittleEndian.ToInt32 (header, 0x70),
+                    DiffDataSize = LittleEndian.ToInt32 (header, 0x74),
+                    DiffCount = LittleEndian.ToInt32 (header, 0x78),
+                };
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            var meta = (DifMetaData)info;
+            BitmapSource base_bitmap;
+            using (var input = VFS.OpenSeekableStream (meta.BaseEntry))
+            {
+                var image = meta.BaseFormat.Read (input, meta.BaseInfo);
+                base_bitmap = image.Bitmap;
+            }
+            stream.Position = 0x7C;
+            var index = new byte[meta.IndexSize];
+            using (var input = new LzssStream (stream, LzssMode.Decompress, true))
+                if (index.Length != input.Read (index, 0, index.Length))
+                    throw new EndOfStreamException();
+
+            if (base_bitmap.Format.BitsPerPixel != 24)
+                base_bitmap = new FormatConvertedBitmap (base_bitmap, PixelFormats.Bgr24, null, 0);
+
+            int src_stride = base_bitmap.PixelWidth * 3;
+            int dst_stride = (src_stride + 3) & ~3;
+            var pixels = new byte[dst_stride * base_bitmap.PixelHeight];
+            int row_offset = 0;
+            var rect = new Int32Rect (0, base_bitmap.PixelHeight, base_bitmap.PixelWidth, 1);
+            for (rect.Y = base_bitmap.PixelHeight-1; rect.Y >= 0; --rect.Y)
+            {
+                base_bitmap.CopyPixels (rect, pixels, src_stride, row_offset);
+                row_offset += dst_stride;
+            }
+
+            stream.Position = 0x7C + meta.PackedIndexSize;
+            using (var diff = new LzssStream (stream, LzssMode.Decompress, true))
+            {
+                int index_src = 0;
+                for (int i = 0; i < meta.DiffCount; ++i)
+                {
+                    int offset = LittleEndian.ToInt32 (index, index_src);
+                    int size   = LittleEndian.ToInt32 (index, index_src+4);
+                    index_src += 8;
+                    diff.Read (pixels, offset, size);
+                }
+                return ImageData.CreateFlipped (info, PixelFormats.Bgr24, null, pixels, dst_stride);
+            }
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new NotImplementedException ("DifFormat.Write not implemented");
+        }
+    }
+}

supported.html

@@ -63,6 +63,7 @@ Grisaia no Kajitsu<br/>
 Happiness! Re:Lucks<br/>
 Kamikaze ☆ Explorer!<br/>
 Makai Tenshi Djibril -Episode 4-<br/>
+Sengoku Tenshi Djibril<br/>
 Shukufuku no Campanella<br/>
 TsunaBan ♥ Love Mix<br/>
 Utatemeguri<br/>
@@ -241,7 +242,7 @@ Shoujo Senki Soul Eater<br/>
 <tr class="odd"><td>*.prs</td><td><tt>YB</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.way</td><td><tt>WADY</tt></td><td>No</td></tr>
 <tr><td>*.dat</td><td>-</td><td>No</td><td rowspan="2">M no Violet</td><td rowspan="2">Nanase Ren</td></tr>
-<tr><td>*</td><td><tt>gra</tt><br/><tt>mas</tt></td><td>No</td></tr>
+<tr><td>*</td><td><tt>gra</tt><br/><tt>mas</tt><br/><tt>dif</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.ald</td><td>-</td><td>No</td><td rowspan="2">Alice Soft</td><td rowspan="2">Tsuma Shibori</td></tr>
 <tr class="odd"><td>*.qnt</td><td><tt>QNT</tt></td><td>No</td></tr>
 <tr><td>*.pd<br/>*.pb</td><td>-</td><td>No</td><td>Discovery</td><td>Tsuma Tsuma</td></tr>
@@ -552,6 +553,7 @@ Gigai no Alruna<br/>
 </td></tr>
 <tr class="odd"><td>sys4ini.bin<br/>sys3ini.bin<br/>*.alf</td><td><tt>S4IC</tt><br/><tt>S3IC</tt></td><td>No</td><td rowspan="2">Eushully</td><td rowspan="2">
 Kuutei Senki ~Tasogare ni Shizumu Kusabi~<br/>
+Meishoku no Reiki<br/>
 Soukai no Oujo-tachi<br/>
 Soukai no Valkyria <br/>
 </td></tr>