add bitmapimage to bitmap converter, add icon saving test (only saves one resolution)

Author: unitycoder

PixelArtTool/MainWindow.xaml

@@ -113,6 +113,9 @@
 				<Button x:Name="btnSave" ToolTip="Save (Ctrl+S)" Click="OnSaveButton">
 					<Image Source="/Resources/Buttons/save.png" Width="24" Height="24" RenderOptions.BitmapScalingMode="NearestNeighbor" ToolTip="Save.." />
 				</Button>
+				<Button x:Name="btnSaveIco" ToolTip="Save (Ctrl+S)" Click="OnExportIcoButtonClick">
+					<Image Source="/Resources/Buttons/emptybutton.png" Width="24" Height="24" RenderOptions.BitmapScalingMode="NearestNeighbor" ToolTip="Export .ico" />
+				</Button>
 			</ToolBar>
 
 			<ToolBar Band="1" BandIndex="1" VerticalAlignment="Top" Background="#FF9C9C9C">

PixelArtTool/MainWindow.xaml.cs

@@ -1494,5 +1494,20 @@ private void rectSecondaryColor_MouseDown(object sender, MouseButtonEventArgs e)
                 ((Rectangle)sender).Fill = newcolor;
             }
         }
+
+
+        private void OnExportIcoButtonClick(object sender, RoutedEventArgs e)
+        {
+            // TODO try this https://stackoverflow.com/a/32530019/5452781
+
+            // this only saves one size
+            var bitmapimage = ConvertWriteableBitmapToBitmapImage(canvasBitmap);
+            var bitmap = ConvertBitmapImageToBitmap(bitmapimage);
+            System.Drawing.Icon icon = System.Drawing.Icon.FromHandle(bitmap.GetHicon());
+            using (var fileStream = File.Create("D:\\myicon.ico"))
+            {
+                icon.Save(fileStream);
+            }
+        }
     } // class
 } // namespace

PixelArtTool/Tools.cs

@@ -516,6 +516,20 @@ public static BitmapImage ConvertWriteableBitmapToBitmapImage(WriteableBitmap wb
             return bmImage;
         }
 
+        // https://stackoverflow.com/a/6484754/5452781
+        public static System.Drawing.Bitmap ConvertBitmapImageToBitmap(BitmapImage bitmapImage)
+        {
+            using (MemoryStream outStream = new MemoryStream())
+            {
+                BitmapEncoder enc = new BmpBitmapEncoder();
+                enc.Frames.Add(BitmapFrame.Create(bitmapImage));
+                enc.Save(outStream);
+                System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(outStream);
+
+                return new System.Drawing.Bitmap(bitmap);
+            }
+        }
+
         public static SolidColorBrush ConvertSystemDrawingColorToSolidColorBrush(System.Drawing.Color c)
         {
             return new SolidColorBrush(Color.FromArgb(c.A, c.R, c.G, c.B));