feat: add PAC/TLP format

Many internal image(?) formats remain unsupported now.

ArcFormats/ArcFormats.csproj

@@ -287,6 +287,7 @@
     <Compile Include="FrontWing\ArcDAT.cs" />
     <Compile Include="FrontWing\ArcFG.cs" />
     <Compile Include="FrontWing\ArcFLT.cs" />
+    <Compile Include="FrontWing\ArcTLP.cs" />
     <Compile Include="FrontWing\ArcVAV.cs" />
     <Compile Include="FrontWing\ImageFG.cs" />
     <Compile Include="GLib\ArcG.cs" />

ArcFormats/FrontWing/ArcTLP.cs

@@ -0,0 +1,106 @@
+//! \file       ArcTLP.cs
+//! \date       2025-12-22
+//! \brief      FrontWing 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;
+using GameRes.Utility;
+using GameRes.Compression;
+
+namespace GameRes.Formats.FrontWing
+{
+    [Export(typeof(ArchiveFormat))]
+    public class TlpOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PAC/TLP"; } }
+        public override string Description { get { return "'Time Leap Paradise' resource archive"; } }
+        public override uint     Signature { get { return 0x5f504c54; } } // 'TLP_DAT'
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "DAT"))
+                return null;
+
+            int count = file.View.ReadInt32 (0x10);
+            if (!IsSaneCount (count))
+                return null;
+
+            int index_size = 0x110 * count;
+            var index = file.View.ReadBytes (0x20, (uint)index_size);
+            byte type = file.View.ReadByte (0x18);
+            Decrypt (index, index_size, type);
+
+            var first_name = Binary.GetCString (index, 0, 0x104);
+            if (first_name != "data/ajfkur3h45n56d7u78a7nh9u7iI8ny0fau6i4al27we4hfuelnrg")
+                return null;
+
+            int index_offset = 0x110;
+            var dir = new List<Entry> (count - 1);
+            for (int i = 1; i < count; i++)
+            {
+                var name = Binary.GetCString (index, index_offset, 0x104);
+                var entry = Create<PackedEntry> (name);
+                entry.Offset = LittleEndian.ToUInt32 (index, index_offset + 0x104);
+                entry.UnpackedSize = LittleEndian.ToUInt32 (index, index_offset + 0x108);
+                entry.Size = LittleEndian.ToUInt32 (index, index_offset + 0x10C);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                index_offset += 0x110;
+                dir.Add (entry);
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
+            byte type = arc.File.View.ReadByte (0x18);
+            int len = Math.Min (arc.File.View.ReadByte (0x19) >> 1, data.Length);
+            Decrypt (data, len, type);
+            return new ZLibStream (new MemoryStream (data), CompressionMode.Decompress);
+        }
+
+        void Decrypt (byte[] buffer, int length, byte type = 0)
+        {
+            if (type == 0)
+            {
+                byte key = 0xcb;
+                for (int i = 0; i < length; i++)
+                {
+                    buffer[i] = Binary.RotByteR ((byte)(buffer[i] ^ key), 1);
+                    key = 1;
+                }
+            }
+
+            else
+            {
+                throw new System.NotImplementedException ("decryption type not implemented");
+            }
+        }
+    }
+}