implemented HG2 images containing multiple frames.

ArcFormats/ArcFormats.csproj

@@ -69,6 +69,7 @@
     <Compile Include="ArcPBX.cs" />
     <Compile Include="Banana\ArcPK.cs" />
     <Compile Include="Banana\ImageMAG.cs" />
+    <Compile Include="CatSystem\ArcHG2.cs" />
     <Compile Include="CatSystem\ImageHG2.cs" />
     <Compile Include="Eushully\ArcGPC.cs" />
     <Compile Include="Eushully\ImageGP.cs" />

ArcFormats/CatSystem/ArcHG2.cs

@@ -0,0 +1,100 @@
+//! \file       ArcHG2.cs
+//! \date       Sun Nov 29 13:09:09 2015
+//! \brief      CatSystem2 HG-2 multi-frame image.
+//
+// Copyright (C) 2015 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Utility;
+
+namespace GameRes.Formats.CatSystem
+{
+    [Export(typeof(ArchiveFormat))]
+    public class Hg2Opener : ArchiveFormat
+    {
+        public override string         Tag { get { return "HG2"; } }
+        public override string Description { get { return "CatSystem2 engine multi-image"; } }
+        public override uint     Signature { get { return 0x322d4748; } } // 'HG-2'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (0x25 != file.View.ReadInt32 (8))
+                return null;
+            var base_name = Path.GetFileNameWithoutExtension (file.Name);
+            var dir = new List<Entry>();
+            long offset = 0xC;
+            int i = 0;
+            while (offset < file.MaxOffset)
+            {
+                uint section_size = file.View.ReadUInt32 (offset+0x40);
+                var entry = new Entry
+                {
+                    Name = string.Format ("{0}#{1:D4}.tga", base_name, i),
+                    Type = "image",
+                    Offset = offset,
+                };
+                if (0 == section_size)
+                    entry.Size = (uint)(file.MaxOffset - offset);
+                else
+                    entry.Size = section_size;
+                dir.Add (entry);
+                if (0 == section_size)
+                    break;
+                offset += section_size;
+                ++i;
+            }
+            if (dir.Count < 1)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            // emulate TGA image
+            var offset = entry.Offset;
+            var info = new Hg2MetaData
+            {
+                HeaderSize  = 0x4C,
+                Width       = arc.File.View.ReadUInt32 (offset),
+                Height      = arc.File.View.ReadUInt32 (offset+4),
+                BPP         = arc.File.View.ReadInt32 (offset+8),
+                DataPacked  = arc.File.View.ReadInt32 (offset+0x14),
+                DataUnpacked= arc.File.View.ReadInt32 (offset+0x18),
+                CtlPacked   = arc.File.View.ReadInt32 (offset+0x1C),
+                CtlUnpacked = arc.File.View.ReadInt32 (offset+0x20),
+                CanvasWidth = arc.File.View.ReadUInt32 (offset+0x2C),
+                CanvasHeight= arc.File.View.ReadUInt32 (offset+0x30),
+                OffsetX     = arc.File.View.ReadInt32 (offset+0x34),
+                OffsetY     = arc.File.View.ReadInt32 (offset+0x38),
+            };
+            using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
+            using (var reader = new Hg2Reader (input, info))
+            {
+                return TgaStream.Create (info, reader.Unpack(), true);
+            }
+        }
+    }
+}