(Legacy): implemented EP1 archives.

Legacy/Legacy.csproj

@@ -157,6 +157,7 @@
     <Compile Include="Rune\ArcYK.cs" />
     <Compile Include="Sarang\ImageABC.cs" />
     <Compile Include="Sogna\ArcSGS.cs" />
+    <Compile Include="StudioEbisu\ArcEP1.cs" />
     <Compile Include="System21\ImageTEX.cs" />
     <Compile Include="Tako\ArcMPK.cs" />
     <Compile Include="Tetratech\ArcBND.cs" />

Legacy/StudioEbisu/ArcEP1.cs

@@ -0,0 +1,120 @@
+//! \file       ArcEP1.cs
+//! \date       2019 Mar 13
+//! \brief      Studio Ebisu resource archive.
+//
+// Copyright (C) 2019 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 System.Windows.Media;
+using GameRes.Compression;
+
+namespace GameRes.Formats.Ebisu
+{
+    internal class Ep1MetaData : ImageMetaData
+    {
+        public int  Method;
+    }
+
+    internal class Ep1Entry : Entry
+    {
+        public Ep1MetaData  Info;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class Ep1Opener : ArchiveFormat
+    {
+        public override string         Tag { get { return "EP1"; } }
+        public override string Description { get { return "Studio Ebisu resource archive"; } }
+        public override uint     Signature { get { return 0x315045; } } // 'EP1'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            long index_offset = 8;
+            var dir = new List<Entry>();
+            while (index_offset < file.MaxOffset)
+            {
+                var name = file.View.ReadString (index_offset, 0x20);
+                if (string.IsNullOrEmpty (name))
+                    return null;
+                var entry = new Ep1Entry {
+                    Name = name,
+                    Type = "image",
+                    Offset = index_offset + 0x30,
+                    Size = file.View.ReadUInt32 (index_offset+0x2C),
+                    Info = new Ep1MetaData {
+                        Width  = file.View.ReadUInt32 (index_offset+0x20),
+                        Height = file.View.ReadUInt32 (index_offset+0x24),
+                        Method = file.View.ReadInt32  (index_offset+0x28),
+                        BPP    = 32,
+                    },
+                };
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x30 + entry.Size;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
+        {
+            var ep1ent = (Ep1Entry)entry;
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            return new Ep1BitmapDecoder (input, ep1ent.Info);
+        }
+    }
+
+    internal class Ep1BitmapDecoder : BinaryImageDecoder
+    {
+        int     m_method;
+
+        bool IsCompressed { get { return m_method >= 4 && m_method <= 7; } }
+
+        public Ep1BitmapDecoder (IBinaryStream input, Ep1MetaData info) : base (input, info)
+        {
+            m_method = info.Method;
+        }
+
+        protected override ImageData GetImageData ()
+        {
+            var pixels = new byte[Info.iWidth * Info.iHeight * 4];
+            if (IsCompressed)
+            {
+                using (var lzss = new LzssStream (m_input.AsStream, LzssMode.Decompress, true))
+                {
+                    lzss.Config.FrameInitPos = 0xFF0;
+                    lzss.Read (pixels, 0, pixels.Length);
+                }
+            }
+            else
+            {
+                m_input.Read (pixels, 0, pixels.Length);
+            }
+            return ImageData.Create (Info, PixelFormats.Bgra32, null, pixels);
+        }
+    }
+}