BGI/Ethornell engine image format.

ArcFormats/ImageBGI.cs

@@ -0,0 +1,92 @@
+//! \file       ImageBGI.cs
+//! \date       Fri Apr 03 01:39:41 2015
+//! \brief      BGI/Ethornell engine image format.
+//
+// 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GameRes.Formats.BGI
+{
+    [Export(typeof(ImageFormat))]
+    public class BgiFormat : ImageFormat
+    {
+        public override string         Tag { get { return "BGI"; } }
+        public override string Description { get { return "BGI/Ethornell image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public BgiFormat ()
+        {
+            Extensions = new string[] { "", "bgi" };
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("BgiFormat.Write not implemented");
+        }
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            using (var input = new ArcView.Reader (stream))
+            {
+                int width  = input.ReadInt16();
+                int height = input.ReadInt16();
+                if (width <= 0 || height <= 0)
+                    return null;
+                int bpp = input.ReadInt32();
+                if (24 != bpp && 32 != bpp)
+                    return null;
+                if (0 != input.ReadInt64())
+                    return null;
+                return new ImageMetaData
+                {
+                    Width = (uint)width,
+                    Height = (uint)height,
+                    BPP = bpp,
+                };
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            int stride = (int)info.Width*((info.BPP+7)/8);
+            var pixels = new byte[stride*info.Height];
+            stream.Position = 0x10;
+            int read = stream.Read (pixels, 0, pixels.Length);
+            if (read != pixels.Length)
+                throw new InvalidFormatException();
+            PixelFormat format;
+            if (24 == info.BPP)
+                format = PixelFormats.Bgr24;
+            else
+                format = PixelFormats.Bgra32;
+            var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, 96, 96,
+                                              format, null, pixels, stride);
+            bitmap.Freeze();
+            return new ImageData (bitmap, info);
+        }
+    }
+}