added image conversion function.

ConvertImages.xaml.cs

@@ -0,0 +1,41 @@
+using System.Diagnostics;
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using GameRes;
+using GARbro.GUI.Properties;
+
+namespace GARbro.GUI
+{
+    /// <summary>
+    /// Interaction logic for ConvertImages.xaml
+    /// </summary>
+    public partial class ConvertImages : Window
+    {
+        public ConvertImages ()
+        {
+            InitializeComponent ();
+            InitImageFormats (this.ImageConversionFormat);
+        }
+
+        void InitImageFormats (ComboBox image_format)
+        {
+            /*
+            var formats = FormatCatalog.Instance.ImageFormats;
+            var models = formats.Select (f => new ImageFormatModel (f)).ToList();
+            var selected_format = Settings.Default.appLastImageFormat;
+            var selected = models.FirstOrDefault (f => f.Tag.Equals (selected_format));
+            image_format.ItemsSource = models;
+            if (null != selected)
+                image_format.SelectedItem = selected;
+            else if (models.Any())
+                image_format.SelectedIndex = 0;
+            */
+        }
+
+        private void ConvertButton_Click (object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = true;
+        }
+    }
+}