Currently, the PdfProcessing document model is providing support only for a single function in the Function entry.
According to the PDF Specification: Function: A 1-in, n-out function or an array of n 1-in, 1-out functions.
BT 48 819.32 Td -16.6 Ts (Some text to display) Tj ET
Currently, when we parse inline image dictionaries we rely on the assumption that the colorspace will be PdfName. However, there are files with complex colorspaces that are PdfArray and InvalidCastException is thrown. All the content after this exception is lost and not visualized by RadPdfViewer.
Add support for Lab color space. Currently alternate color is used to render the pixels, which may result in incorrect colors.
According to the PDF specification (Adobe® Portable Document Format Version 1.7):
Append a rectangle to the current path as a complete subpath, with lower-left corner (x, y) and dimensions width and height in user space.
The operation:
x y width height re
An invalid case:
0 - 595 -842 re
This leads to an exception thrown: System.NullReferenceException: 'Object reference not set to an instance of an object.'
Guidelines of how to provide a custom implementation of the JPXDecode filter can be found in the Customize Rendering section of the documentation and a sample implementation can be found in the SDK examples.
Hi Telerik Support
We use your Telerik PDF-Viewer since your last Version "UI for WPF R1 2021" which supports Type 3 fonts.
Now the version runs productive by our customers. But after a day, they found some special PDFs that doesn't work quite right with your PDF-Viewer.
In the appendix you will find the PDf-Files as samples for the bugs that i'm describing.
Because of data privacy, the PDF-Files are cutted and cropped.
Also a demo project is appended (It could also be reproduced with the demo Progress Telerik WPF UI for th PDF-Viewer).
First Problem: Blank Page
Hint: It seems that only a few PDF-Files from a specific program seems to be a problem.
- Open Demo "WpfAppPdfViewer.exe"
- Open the file sample_1_blank_page.pdf(see appendix)
- You will see only a blank page
- Open the same PDF-File in another PDF-Reader like Adobe Reader and you will see a scan with an illegible stamp of an address
Second Problem: Displaying data delayed
- Open Demo "Progress Telerik UI for WPF"
- Open the file sample_2_delayed_display.pdf (see appendix)
- You will see only a blank page
- Wait approx. 5-10 sec. and you will see the content of the PDF-File.
I would be glad for a quick possible solution for our customer.
Best regards
Serge Schoop
When importing a document containing Outlines (Bookmarks) containing Actions with an empty dictionary:
<</Title(Bookmarks)/Parent .../First .../Last .../Prev .../A<<>>/Count ...>leads to an exception thrown: System.MissingMethodException: 'Cannot create an abstract class.'
Even small documents (~30 kb) containing images encoded with CCITTFaxDecode filter can take about 10 seconds to be opened. In 2014 Q1 SP1 such documents load faster.
Implement import of documents containing Type 3 fonts.