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indigophoenix  
#1 Posted : Wednesday, October 30, 2019 7:23:04 AM(UTC)
indigophoenix

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Hello,

When we try to use the WPF PDF viewer to view certain PDFs, the viewer crashes with the stack trace below. We've attached an example to the post. Any help would be appreciated. This happens with the 4.19 version of the SDK.

Thank you!

Patagames.Pdf.Net.Exceptions.FatalErrorException
HResult=0x80131500
Message=Fatal runtime error.
Source=Patagames.Pdf
StackTrace:
at Patagames.Pdf.Pdfium.FPDF_RenderPageBitmap_Start(IntPtr bitmap, IntPtr page, Int32 start_x, Int32 start_y, Int32 size_x, Int32 size_y, PageRotate rotate, RenderFlags flag, IFSDK_PAUSE pause)
at Patagames.Pdf.Net.PdfPage.StartProgressiveRender(PdfBitmap bitmap, Int32 x, Int32 y, Int32 width, Int32 height, PageRotate rotate, RenderFlags flags, Byte[] userData)
at Patagames.Pdf.Net.Controls.Wpf.PRCollection.ProcessExisting(PdfBitmap bitmap, PdfPage page, Int32Rect pageRect, PageRotate pageRotate, RenderFlags renderFlags)
at Patagames.Pdf.Net.Controls.Wpf.PRCollection.RenderPage(PdfPage page, Int32Rect pageRect, PageRotate pageRotate, RenderFlags renderFlags, Boolean useProgressiveRender)
at Patagames.Pdf.Net.Controls.Wpf.PdfViewer.DrawPage(PdfBitmap bitmap, PdfPage page, Rect actualRect)
at Patagames.Pdf.Net.Controls.Wpf.PdfViewer.OnRender(DrawingContext drawingContext)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at JW.Document.Previewer.Example.App.Main()

Inner Exception 1:
AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Form.PDF (30kb) downloaded 2 time(s).

Edited by user Wednesday, October 30, 2019 7:24:53 AM(UTC)  | Reason: Not specified
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Paul Rayman  
#2 Posted : Wednesday, October 30, 2019 6:53:13 PM(UTC)
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Hi,

This issue is not reproduces on my part.
Could you, please, provide an sample app where the issue appears?
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indigophoenix  
#3 Posted : Thursday, October 31, 2019 4:54:19 PM(UTC)
indigophoenix

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Hi,

Thanks for the response. Here is a sample app. Should just have to restore the nuget packages and put a license key in the viewmodel. I had to remove all the dlls because of the uploader wouldn't allow them. Please let me know if you need anything more.

Thanks for the assistance!

SamplePreviewerApp.zip (27kb) downloaded 1 time(s).

Edited by user Thursday, October 31, 2019 4:56:58 PM(UTC)  | Reason: Not specified
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Paul Rayman  
#4 Posted : Friday, November 1, 2019 5:41:19 PM(UTC)
Paul Rayman

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Thanks for your bug report.
We will fix this issue as soon as possible.
Currently I can suggest a workaround. Please open the documents as shown below.

Code:

public PdfDocument Document
 {
     get
     {
         var stream = new MemoryStream(Resources.Form);
         return PdfDocument.Load(stream, new PdfForms());
     }
}

Edited by user Friday, November 1, 2019 5:42:40 PM(UTC)  | Reason: Not specified
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thanks 1 user thanked Paul Rayman for this useful post.
indigophoenix on 11/4/2019(UTC)
Paul Rayman  
#5 Posted : Saturday, November 2, 2019 1:08:25 AM(UTC)
Paul Rayman

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thanks 1 user thanked Paul Rayman for this useful post.
indigophoenix on 11/4/2019(UTC)
indigophoenix  
#6 Posted : Monday, November 4, 2019 12:27:58 PM(UTC)
indigophoenix

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The fixed version worked great! Thank you for the quick update!
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