implemented System21 PAK archives and BET images.

Legacy/Legacy.csproj

@@ -65,6 +65,8 @@
     <Compile Include="Sceplay\ArcPAK.cs" />
     <Compile Include="Sceplay\ImageG24.cs" />
     <Compile Include="ShapeShifter\ArcBND.cs" />
+    <Compile Include="System21\ArcPAK.cs" />
+    <Compile Include="System21\ImageBET.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\ArcFormats\ArcFormats.csproj">

Legacy/System21/ArcPAK.cs

@@ -0,0 +1,73 @@
+//! \file       ArcPAK.cs
+//! \date       2017 Dec 09
+//! \brief      System21 resource archive.
+//
+// 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+
+namespace GameRes.Formats.System21
+{
+    [Export(typeof(ArchiveFormat))]
+    public class PakOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PAK/SYSTEM21"; } }
+        public override string Description { get { return "System21 engine resource archive"; } }
+        public override uint     Signature { get { return 0x978FAD8F; } } // '少女'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public PakOpener ()
+        {
+            Signatures = new uint[] { 0x978FAD8F, 0x798AF589 }; // '快楽'
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            bool new_version = file.View.ReadUInt32 (0) == 0x798AF589u;
+            uint name_size = new_version ? 0x34u : 0x64u;
+            uint data_offset = file.View.ReadUInt32 (4);
+            int count = (int)((data_offset - 12) / (name_size + 4));
+            if (!IsSaneCount (count))
+                return null;
+
+            uint index_offset = 12;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, name_size);
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = data_offset;
+                entry.Size = file.View.ReadUInt32 (index_offset + name_size);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += name_size + 4;
+                data_offset += entry.Size;
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}

Legacy/System21/ImageBET.cs

@@ -0,0 +1,92 @@
+//! \file       ImageBET.cs
+//! \date       2017 Dec 09
+//! \brief      System21 compressed image.
+//
+// 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;
+using System.Windows.Media.Imaging;
+using GameRes.Compression;
+
+namespace GameRes.Formats.System21
+{
+    [Export(typeof(ImageFormat))]
+    public class BetFormat : ImageFormat
+    {
+        public override string         Tag { get { return "BET"; } }
+        public override string Description { get { return "System21 compressed image format"; } }
+        public override uint     Signature { get { return 0x44445A53; } } // 'SZDD'
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension (".bet"))
+                return null;
+            using (var lz = OpenLzStream (file.AsStream))
+            using (var input = new BinaryStream (lz, file.Name))
+            {
+                uint w = input.ReadUInt32();
+                uint h = input.ReadUInt32();
+                int bpp = input.ReadUInt16();
+                if ((bpp != 24 && bpp != 8) || 0 == w || w > 0x8000 || 0 == h || h > 0x8000)
+                    return null;
+                return new ImageMetaData { Width = w, Height = h, BPP = bpp };
+            }
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            using (var input = OpenLzStream (file.AsStream))
+            {
+                int stride = (int)info.Width * info.BPP / 8;
+                var pixels = new byte[stride * (int)info.Height];
+                for (int i = 0; i < 10; ++i)
+                    input.ReadByte();
+                BitmapPalette palette = null;
+                if (8 == info.BPP)
+                    palette = ReadPalette (input);
+                if (input.Read (pixels, 0, pixels.Length) != pixels.Length)
+                    throw new InvalidFormatException();
+                for (int i = 0; i < pixels.Length; ++i)
+                    pixels[i] ^= 0xFF;
+                PixelFormat format = 8 == info.BPP ? PixelFormats.Indexed8 : PixelFormats.Bgr24;
+                return ImageData.CreateFlipped (info, format, palette, pixels, stride);
+            }
+        }
+
+        Stream OpenLzStream (Stream input)
+        {
+            input.Position = 0xE;
+            var lz = new LzssStream (input, LzssMode.Decompress, true);
+            lz.Config.FrameSize = 0x1000;
+            lz.Config.FrameFill = 0x20;
+            lz.Config.FrameInitPos = 0x1000 - 0x10;
+            return lz;
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("BetFormat.Write not implemented");
+        }
+    }
+}