Bug fixes.

Author: AlexanderPro

WindowTextExtractor/Forms/MainForm.cs

@@ -473,11 +473,19 @@ public bool PreFilterMessage(ref Message m)
                                             _windowHandle = windowHandle;
                                             scale = _scale;
                                         }
-                                        using (var image = WindowUtils.CaptureWindow(windowHandle))
+                                        if (scale == 1m)
                                         {
-                                            var newImage = ImageUtils.Reduce(image, (int)(image.Width * scale), (int)(image.Height * scale));
+                                            var newImage = WindowUtils.CaptureWindow(windowHandle);
                                             FillImage(newImage);
                                         }
+                                        else
+                                        {
+                                            using (var image = WindowUtils.CaptureWindow(windowHandle))
+                                            {
+                                                var newImage = ImageUtils.ResizeImage(image, (int)(image.Width * scale), (int)(image.Height * scale));
+                                                FillImage(newImage);
+                                            }
+                                        }
                                         var windowInformation = WindowUtils.GetWindowInformation(windowHandle);
                                         FillInformation(windowInformation);
                                         OnContentChanged();
@@ -532,9 +540,16 @@ private void CaptureWindowCallback()
             {
                 if (imageTab || isRecording)
                 {
-                    using (var sourceImage = WindowUtils.CaptureWindow(windowHandle))
+                    if (scale == 1m)
                     {
-                        newImage = ImageUtils.Reduce(sourceImage, (int)(sourceImage.Width * scale), (int)(sourceImage.Height * scale));
+                        newImage = WindowUtils.CaptureWindow(windowHandle);
+                    }
+                    else
+                    {
+                        using (var sourceImage = WindowUtils.CaptureWindow(windowHandle))
+                        {
+                            newImage = ImageUtils.ResizeImage(sourceImage, (int)(sourceImage.Width * scale), (int)(sourceImage.Height * scale));
+                        }
                     }
                 }
             }
@@ -600,13 +615,25 @@ private void UpdateButtonCallback()
 
         private void WriteVideoFrameCallback()
         {
-            lock (_lockObject)
+            try
             {
-                if (_isRecording)
+                lock (_lockObject)
                 {
-                    _videoWriter.WriteVideoFrame(_image);
+                    if (_isRecording)
+                    {
+                        _videoWriter.WriteVideoFrame(_image);
+                    }
                 }
             }
+            catch (ArgumentException e) when (e.Message.Contains("size must be of the same as video size"))
+            {
+                BeginInvoke((MethodInvoker)delegate
+                {
+                    MessageBox.Show("Don't resize the window while recording.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                });
+
+                throw;
+            }
         }
 
         private void InitTimers(int fps)

WindowTextExtractor/Utils/ImageUtils.cs

@@ -1,19 +1,41 @@
 using System.Drawing;
 using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
 
 namespace WindowTextExtractor.Utils
 {
     static class ImageUtils
     {
-        public static Bitmap Reduce(Bitmap source, int width, int height)
+        /// <summary>
+        /// Resize the image to the specified width and height.
+        /// </summary>
+        /// <param name="image">The image to resize.</param>
+        /// <param name="width">The width to resize to.</param>
+        /// <param name="height">The height to resize to.</param>
+        /// <returns>The resized image.</returns>
+        public static Bitmap ResizeImage(Image image, int width, int height)
         {
-            var bitmap = new Bitmap(width, height);
-            using (var graphics = Graphics.FromImage(bitmap))
+            var destRect = new Rectangle(0, 0, width, height);
+            var destImage = new Bitmap(width, height);
+
+            destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
+
+            using (var graphics = Graphics.FromImage(destImage))
             {
+                graphics.CompositingMode = CompositingMode.SourceCopy;
+                graphics.CompositingQuality = CompositingQuality.HighQuality;
                 graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
-                graphics.DrawImage(source, new Rectangle(0, 0, width, height), new Rectangle(0, 0, source.Width, source.Height), GraphicsUnit.Pixel);
+                graphics.SmoothingMode = SmoothingMode.HighQuality;
+                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
+
+                using (var wrapMode = new ImageAttributes())
+                {
+                    wrapMode.SetWrapMode(WrapMode.TileFlipXY);
+                    graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
+                }
             }
-            return bitmap;
+
+            return destImage;
         }
     }
 }