Fix memory leak with drawing to bitmap.

src/AddIns/Analysis/CodeQuality/Src/Controls/MatrixControl.cs

@@ -11,6 +11,8 @@ using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
+using System.Windows.Interop;
+using PointF = System.Drawing.PointF;
 
 namespace ICSharpCode.CodeQualityAnalysis.Controls
 {
@@ -138,6 +140,8 @@ namespace ICSharpCode.CodeQualityAnalysis.Controls
 			var maxHeight = ((int) viewport.Height / CellHeight) + 1;
 
 			// how many cells we will draw
+			// sometimes happens when half of cell is hidden in scroll so text isnt drawn
+			// so lets drawn one more cell
 			var cellsHorizontally = maxWidth > matrixWidth ? matrixWidth : maxWidth + 1;
 			var cellsVertically = maxHeight > matrixHeight ? matrixHeight : maxHeight + 1;
 			
@@ -155,11 +159,6 @@ namespace ICSharpCode.CodeQualityAnalysis.Controls
 			backgroundColor.Freeze();
 			drawingContext.DrawRectangle(backgroundColor, null, background);
 			
-			// sometimes happens when half of cell is hidden in scroll so text isnt drawn
-			// so lets drawn one more cell
-//			cellsHorizontally = maxWidth > matrixWidth ? matrixWidth : maxWidth + 1;
-//			cellsVertically = maxHeight > matrixHeight ? matrixHeight : maxHeight + 1;
-			
 			var currentXLine = (currentCell.X - scaledOffsetX) * CellWidth - offsetDiffX;
 			var currentYLine = (currentCell.Y - scaledOffsetY) * CellHeight - offsetDiffY;
 
@@ -264,16 +263,19 @@ namespace ICSharpCode.CodeQualityAnalysis.Controls
 			var spanWidth = (CellWidth - size.Width) / 2;
 			var spanHeight = (CellHeight - size.Height) / 2;
 			
-			g.DrawString(text, fontOjb, System.Drawing.Brushes.Black, new System.Drawing.PointF(spanWidth, spanHeight));
+			g.DrawString(text, fontOjb, System.Drawing.Brushes.Black, new PointF(spanWidth, spanHeight));
 			g.Dispose();
 			
-			var img = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(bmp.GetHbitmap(),
+			var bitmap = bmp.GetHbitmap();
+			var img = Imaging.CreateBitmapSourceFromHBitmap(bitmap,
 			                                                IntPtr.Zero,
 			                                                Int32Rect.Empty,
 			                                                BitmapSizeOptions.FromWidthAndHeight(bmp.Width, bmp.Height));
 			img.Freeze();
 			imgs.Add(text, img);
 			
+			Helper.DeleteObject(bitmap);
+			
 			return img;
 		}
 		

src/AddIns/Analysis/CodeQuality/Src/Utility/Helper.cs

@@ -4,15 +4,20 @@
 using System;
 using System.Windows;
 using System.Windows.Media;
+using ICSharpCode.TreeView;
+using System.Runtime.InteropServices;
 
-namespace ICSharpCode.CodeQualityAnalysis
+namespace ICSharpCode.CodeQualityAnalysis.Utility
 {
 	/// <summary>
 	/// Description of Helper.
 	/// </summary>
 	public static class Helper
 	{
-		public static void FillTree(ICSharpCode.TreeView.SharpTreeView tree,Module module)
+		[DllImport("gdi32.dll")]
+		public static extern bool DeleteObject(IntPtr hObject);
+		
+		public static void FillTree(SharpTreeView tree, Module module)
 		{
 			var root = CreateTreeItem(module);
 			tree.Root = root;