Selecting a range of specific emoji and dragging them raises an exception

[BladeanMericle]

Environment

• OS: Windows 10
• .NET Framework version: 4.0、5.0
• Development tool: Visual Studio 2022 Community
• emoji.wpf version: latest sources (2021-12-14)

Operation

1. Compile Sample project in Emoji.Wpf solution.
2. Launch Sample.exe.
3. Input "🚏" to emoji:RichTextBox.
4. Select a range of "🚏".
5. Drag the selected "🚏".

Expected result.

An exception was not cause.

Actual result.

An exception was cause.

Stacktrace (Sorry for the partial Japanese.)

System.ArgumentOutOfRangeException
  HResult=0x80131502
  Message=パラメーター値は、0 より大きい必要があります。
パラメーター名:pixelWidth
  Source=PresentationCore
  スタック トレース:
   場所 System.Windows.Media.Imaging.RenderTargetBitmap..ctor(Int32 pixelWidth, Int32 pixelHeight, Double dpiX, Double dpiY, PixelFormat pixelFormat)
   場所 System.Windows.Documents.WpfPayload.GetBitmapSourceFromImage(Image image)
   場所 System.Windows.Documents.WpfPayload.CreateComponentParts(PackagePart sourcePart)
   場所 System.Windows.Documents.WpfPayload.SaveRange(ITextRange range, Stream& stream, Boolean useFlowDocumentAsRoot, Boolean preserveTextElements)
   場所 System.Windows.Documents.TextEditorCopyPaste._CreateDataObject(TextEditor This, Boolean isDragDrop)
   場所 System.Windows.Documents.TextEditorDragDrop._DragDropProcess.SourceOnMouseMove(Point mouseMovePoint)
   場所 System.Windows.Documents.TextEditorMouse.OnMouseMoveWithFocus(TextEditor This, MouseEventArgs e)
   場所 System.Windows.Controls.Primitives.TextBoxBase.OnMouseMove(MouseEventArgs e)
   場所 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   場所 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   場所 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   場所 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   場所 System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   場所 System.Windows.Input.InputManager.ProcessStagingArea()
   場所 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   場所 System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   場所 System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   場所 System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   場所 System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   場所 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   場所 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   場所 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   場所 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   場所 System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   場所 MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   場所 MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   場所 System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   場所 System.Windows.Application.RunDispatcher(Object ignore)
   場所 System.Windows.Application.RunInternal(Window window)
   場所 Sample.SampleWindow.Main()

Specific emoji

• 🚏
• 🍼
• 📎
• ◼️
• ◻️
  etc...

[samhocevar]

Hello! Unfortunately, I have been unable to reproduce the issue so far. Could you maybe answer a few questions?

• what is your version of the Segoe UI Emoji font? You can find this information in the Fonts Settings
• do you insert the 🚏 character by copy/pasting it or through the Win. shortcut?
• could you post a screenshot of the Sample application as it runs on your system?
• could you try the latest Git commits I made? I have tweaked the drag-n-drop behaviour

Thanks in advance!

[BladeanMericle]

Thank you for your reply!

what is your version of the Segoe UI Emoji font? You can find this information in the Fonts Settings

Segoe UI Emoji font version is 1.29.

do you insert the 🚏 character by copy/pasting it or through the Win. shortcut?

I used emoji:Picker to insert 🚏 character.

could you post a screenshot of the Sample application as it runs on your system?

could you try the latest Git commits I made? I have tweaked the drag-n-drop behaviour

Unfortunately, An exception was cause yet. (2022-01-06 latest Git commits.)

[BladeanMericle]

I discovered that Windows 10 display settings are also involved.
Display -> Scale and layout -> Change the size of text, apps, and other items

• 100%: Raise exception
• 150%: Not raise exception

Also, the target emoji had a return width of less than 1 for Emoji.Wpf.Image.RenderEmoji method.
ex) 🚏 width is 0.77685546875

Probably, the exception would occur when the result of multiplying the width of the target emoji by DPI scale is less than 1 for System.Windows.Documents.WpfPayload.GetBitmapSourceFromImage method.
RenderTargetBitmap rtb = new RenderTargetBitmap((int)(di.Width * dpi.DpiScaleX), (int)(di.Height * dpi.DpiScaleY), 96.0, 96.0, PixelFormats.Default);
https://source.dot.net/#PresentationFramework/System/Windows/Documents/WpfPayload.cs,438