implemented XL24 images.

ArcFormats/ArcFormats.csproj

@@ -104,6 +104,7 @@
     <Compile Include="NSystem\WidgetMSD.xaml.cs">
       <DependentUpon>WidgetMSD.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Pandora\ImageXL24.cs" />
     <Compile Include="rUGP\ArcRIO.cs" />
     <Compile Include="Astronauts\ArcGXP.cs" />
     <Compile Include="Banana\ImageGEC.cs" />

ArcFormats/Pandora/ImageXL24.cs

@@ -0,0 +1,128 @@
+//! \file       ImageXL24.cs
+//! \date       Thu Jan 05 02:18:34 2017
+//! \brief      Pandora.box image format.
+//
+// Copyright (C) 2017 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 GameRes.Utility;
+
+namespace GameRes.Formats.Terios
+{
+    [Export(typeof(ImageFormat))]
+    public class Xl24Format : ImageFormat
+    {
+        public override string         Tag { get { return "XL24"; } }
+        public override string Description { get { return "\"Pandora.box\" image format"; } }
+        public override uint     Signature { get { return 0x34324C58; } } // 'XL24'
+
+        public Xl24Format ()
+        {
+            Extensions = new string[] { "bmp" };
+        }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            file.Position = 8;
+            uint width  = file.ReadUInt32();
+            uint height = file.ReadUInt32();
+            return new ImageMetaData
+            {
+                Width = width,
+                Height = height,
+                BPP = 24,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            file.Position = 0x10;
+            int stride = (int)info.Width * 3;
+            var pixels = new byte[info.Height * stride];
+            int prev_line = 0;
+            int cur_line = pixels.Length - stride;
+            while (cur_line >= 0)
+            {
+                int dst = cur_line;
+                for (int x = (int)info.Width; x > 0; )
+                {
+                    byte ctl = file.ReadUInt8();
+                    int count;
+                    switch (ctl)
+                    {
+                    case 0:
+                        count = file.ReadUInt8() + 2;
+                        dst += 3 * count;
+                        x -= count;
+                        break;
+                    case 1:
+                        dst += 3;
+                        --x;
+                        break;
+                    case 0x80:
+                        x = 0;
+                        break;
+                    case 0xFF:
+                        file.Read (pixels, dst, 3);
+                        if (--x > 0)
+                            Binary.CopyOverlapped (pixels, dst, dst+3, x * 3);
+                        x = 0;
+                        break;
+                    default:
+                        if (ctl > 0x80)
+                        {
+                            count = ctl - 0x80;
+                            file.Read (pixels, dst, 3);
+                            if (count > 1)
+                                Binary.CopyOverlapped (pixels, dst, dst+3, (count - 1) * 3);
+                            dst += count * 3;
+                            x -= count;
+                        }
+                        else
+                        {
+                            count = 3 * ctl;
+                            file.Read (pixels, dst, count);
+                            dst += count;
+                            x -= ctl;
+                        }
+                        break;
+                    }
+                }
+                if (prev_line != 0)
+                {
+                    for (int i = 0; i < stride; ++i)
+                        pixels[cur_line+i] ^= pixels[prev_line+i];
+                }
+                prev_line = cur_line;
+                cur_line -= stride;
+            }
+            return ImageData.Create (info, PixelFormats.Bgr24, null, pixels, stride);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("Xl24Format.Write not implemented");
+        }
+    }
+}