(Legacy): implemented BPE images.

Legacy/Legacy.csproj

@@ -60,9 +60,11 @@
     <Compile Include="Dice\AudioKWF.cs" />
     <Compile Include="Dice\ImageRBP.cs" />
     <Compile Include="Factor\ArcRES.cs" />
+    <Compile Include="Nabe\ImageYPF.cs" />
     <Compile Include="Nekotaro\ArcNSC.cs" />
     <Compile Include="Nekotaro\ImageGCmp.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="QSoft\ImageBPE.cs" />
     <Compile Include="Rain\ArcBIN.cs" />
     <Compile Include="Saiki\ImageJPX.cs" />
     <Compile Include="Sceplay\ArcPAK.cs" />

Legacy/QSoft/ImageBPE.cs

@@ -0,0 +1,132 @@
+//! \file       ImageBPE.cs
+//! \date       2017 Dec 12
+//! \brief      Qsoft 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.ComponentModel.Composition;
+using System.IO;
+
+namespace GameRes.Formats.QSoft
+{
+    [Export(typeof(ImageFormat))]
+    public class BpeFormat : ImageFormat
+    {
+        public override string         Tag { get { return "BPE"; } }
+        public override string Description { get { return "Qsoft image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension (".bpe") || file.Signature < 0x36)
+                return null;
+            file.Position = 4;
+            var unpacked = Decompress (file, 0x36);
+            if (!unpacked.AsciiEqual ("BM"))
+                return null;
+            using (var bmp = new BinMemoryStream (unpacked, file.Name))
+                return Bmp.ReadMetaData (bmp);
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            int unpacked_size = (int)file.Signature;
+            file.Position = 4;
+            var unpacked = Decompress (file, unpacked_size);
+            using (var bmp = new BinMemoryStream (unpacked, file.Name))
+                return Bmp.Read (bmp, info);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("BpeFormat.Write not implemented");
+        }
+
+        byte[] Decompress (IBinaryStream input, int unpacked_size)
+        {
+            var output = new byte[unpacked_size];
+            int dst = 0;
+            var lhs_nodes = new byte[256];
+            var rhs_nodes = new byte[256];
+            var seq = new byte[1024];
+            int ctl;
+            while ((ctl = input.ReadByte()) != -1)
+            {
+                for (int i = 0; i < 256; ++i)
+                    lhs_nodes[i] = (byte)i;
+                int token = 0;
+                for (;;)
+                {
+                    if (ctl > 127)
+                    {
+                        token += ctl - 127;
+                        ctl = 0;
+                    }
+                    if (256 == token)
+                        break;
+                    for (int i = 0; i <= ctl; ++i)
+                    {
+                        lhs_nodes[token] = (byte)input.ReadByte();
+                        if (token != lhs_nodes[token])
+                            rhs_nodes[token] = (byte)input.ReadByte();
+
+                        ++token;
+                    }
+                    if (256 == token)
+                        break;
+                    ctl = input.ReadByte() & 0xFF;
+                }
+                int chunk_size = Binary.BigEndian (input.ReadUInt16())
+                int x = 0;
+                for (;;)
+                {
+                    if (x != 0)
+                    {
+                        token = seq[--x];
+                    }
+                    else
+                    {
+                        if (chunk_size-- == 0)
+                            break;
+                        token = input.ReadByte();
+                        if (-1 == token)
+                            break;
+                    }
+                    if (token != lhs_nodes[token])
+                    {
+                        if (x+1 >= 1024)
+                            throw new InvalidFormatException();
+                        seq[x++] = rhs_nodes[token];
+                        seq[x++] = lhs_nodes[token];
+                    }
+                    else
+                    {
+                        output[dst++] = (byte)token;
+                        if (output.Length == dst)
+                            return output;
+                    }
+                }
+            }
+            return output;
+        }
+    }
+}