implemented EPK archives and SUR images.

2026-07-08 01:30:18 +08:00 · 2016-09-21 00:50:52 +04:00
parent 3c1a752233
commit 3497bcde41
4 changed files with 387 additions and 0 deletions
--- a/ArcFormats/TamaSoft/ImageSUR.cs
+++ b/ArcFormats/TamaSoft/ImageSUR.cs
@@ -0,0 +1,114 @@
+//! \file       ImageSUR.cs
+//! \date       Tue Sep 20 10:56:45 2016
+//! \brief      TamaSoft image format.
+//
+// Copyright (C) 2016 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Tama
+{
+    [Export(typeof(ImageFormat))]
+    public class SurFormat : ImageFormat
+    {
+        public override string         Tag { get { return "SUR"; } }
+        public override string Description { get { return "TamaSoft ADV system image"; } }
+        public override uint     Signature { get { return 0x52555345; } } // 'ESUR'
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            var header = new byte[0x10];
+            if (header.Length != stream.Read (header, 0, header.Length))
+                return null;
+            return new ImageMetaData
+            {
+                Width  = LittleEndian.ToUInt32 (header, 8),
+                Height = LittleEndian.ToUInt32 (header, 12),
+                BPP    = 32,
+            };
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            var pixels = new byte[info.Width * info.Height * 4];
+            stream.Position = 0x20;
+            UnpackLzss (stream, pixels);
+            return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("SurFormat.Write not implemented");
+        }
+
+        /// <summary>
+        /// Differs from a common LZSS implementation by frame offset encoding.
+        /// </summary>
+        void UnpackLzss (Stream input, byte[] output)
+        {
+            int dst = 0;
+            var frame = new byte[0x1000];
+            int frame_pos = 0xFEE;
+            const int frame_mask = 0xFFF;
+            int ctl = 2;
+            while (dst < output.Length)
+            {
+                ctl >>= 1;
+                if (1 == ctl)
+                {
+                    ctl = input.ReadByte();
+                    if (-1 == ctl)
+                        throw new EndOfStreamException();
+                    ctl |= 0x100;
+                }
+                if (0 != (ctl & 1))
+                {
+                    byte b = (byte)input.ReadByte();
+                    frame[frame_pos++] = b;
+                    frame_pos &= frame_mask;
+                    output[dst++] = b;
+                }
+                else
+                {
+                    int lo = input.ReadByte();
+                    int hi = input.ReadByte();
+                    if (-1 == hi)
+                        throw new EndOfStreamException();
+                    int offset = hi >> 4 | lo << 4;
+                    int count = Math.Min (3 + (hi & 0xF), output.Length - dst);
+                    while (count --> 0)
+                    {
+                        byte v = frame[offset++];
+                        offset &= frame_mask;
+                        frame[frame_pos++] = v;
+                        frame_pos &= frame_mask;
+                        output[dst++] = v;
+                    }
+                }
+            }
+        }
+    }
+}