(Legacy): PAK archives and SFG images.

Legacy/AlphaSystem/ArcPAK.cs

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+//! \file       ArcPAK.cs
+//! \date       2019 Mar 26
+//! \brief      Alpha System engine 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;
+
+// [020531][Lust] Fall Down ~Ochita Tenshi no Monogatari~
+
+namespace GameRes.Formats.AlphaSystem
+{
+    [Export(typeof(ArchiveFormat))]
+    public class PakOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PAK/ALPHA"; } }
+        public override string Description { get { return "Alpha System resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public PakOpener ()
+        {
+            ContainedFormats = new[] { "SFG", "WAV" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count))
+                return null;
+            int first_offset = file.View.ReadInt32 (0x30);
+            if (first_offset != count * 0x30 + 4)
+                return null;
+            int index_offset = 4;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, 0x20);
+                if (string.IsNullOrWhiteSpace (name))
+                    return null;
+                var entry = Create<Entry> (name);
+                entry.Size   = file.View.ReadUInt32 (index_offset+0x24);
+                entry.Offset = file.View.ReadUInt32 (index_offset+0x2C);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x30;
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}

Legacy/AlphaSystem/ImageSFG.cs

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+//! \file       ImageSFG.cs
+//! \date       2019 Mar 26
+//! \brief      Alpha System image format.
+//
+// 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GameRes.Formats.AlphaSystem
+{
+    [Export(typeof(ImageFormat))]
+    public class SfgFormat : ImageFormat
+    {
+        public override string         Tag { get { return "SFG"; } }
+        public override string Description { get { return "Alpha System image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (8);
+            int bpp = header.ToUInt16 (0);
+            ushort width  = header.ToUInt16 (2);
+            ushort height = header.ToUInt16 (4);
+            if (bpp != 1 && bpp != 4 || width == 0 || height == 0)
+                return null;
+            int expected_length = width * height * bpp + 8;
+            if (1 == bpp)
+                expected_length += 0x400;
+            if (expected_length != file.Length)
+                return null;
+            return new ImageMetaData {
+                Width = width,
+                Height = height,
+                BPP = bpp * 8,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            file.Position = 8;
+            BitmapPalette palette = null;
+            PixelFormat format;
+            if (8 == info.BPP)
+            {
+                palette = ReadPalette (file.AsStream, 0x100, PaletteFormat.BgrA);
+                format = PixelFormats.Indexed8;
+            }
+            else
+            {
+                format = PixelFormats.Bgra32;
+            }
+            int stride = info.iWidth * info.BPP / 8;
+            var pixels = new byte[stride * info.iHeight];
+            file.Read (pixels, 0, pixels.Length);
+            return ImageData.Create (info, format, palette, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("SfgFormat.Write not implemented");
+        }
+    }
+}