After signing a document using the PdfProcessing library and the document is loaded in Adobe Acrobat an error is shown when the signature widget is clicked:
Error during signature verification.  

Adobe Acrobat error.
Expected a dict object.

Wrong matrix calculations lead to incorrect image (Form XObject) during export

The images inside form sources are not correctly positioned and might be invisible.

This issue is regression it works with R2 2020.

Wrong matrix calculations lead to incorrect image (Form XObject) size.

In specific cases when importing a document containing an Indirect Reference keyword ("R") within an image data an exception is thrown: InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Operators.State.SetLineDashPattern' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfInt'.'

InvalidCastException is thrown when importing a document containing Byte order marks (BOM) at the beginning of the file. The bytes are read as part of the document content and this changes all the document`s offsets.

Importing a document containing an EI keyword within the image stream leads to an endless loop and the document is not imported successfully.

The import freezes due to a lot of checks in the HandleInvalidClippingPathOperatorPosition method.

Support for validating signature fields signed with signatures that are encoded in ETSI.RFC3161 encoding should be added.

Currently, when invoking the Signature`s TryValidate() method an exception is thrown: NotSupportedException: 'No signature validation handler was found for the subfilter: ETSI.RFC3161'

When inserting a specific Jpeg image with an ICC profile there is a problem when opening the file in Adobe: 



On the other hand, the PDF is successfully opened by browsers and most PDF viewers.

Table cell content is not displayed after PDF export if cell Preferred Width is too small.

Workaround: Make cell Size(Preferred Width) big enough for the contents to fit.

 

Incorrect cell borders when converting to PDF and a table that contains borders with different colors.

With the current implementation when passing the font file using the FontsRepository the entire font file is embedded.

In order to embed only a subset of characters used in the document, the font should be installed and the font shouldn't be registered in the FontsRepository.

When importing a document containing an EI keyword not followed by space or return an exception is thrown: EndOfStreamException: 'Attempted to read past the end of the stream.'

We should implement the logic for getting character codes from Unicode when using CFFFontSource.

Workaround: The font may be changed by creating a similar font with FontsRepository.TryCreateFont(...) method.
Telerik.Windows.Documents.Fixed.Model.Fonts.FontsRepository.RegisterFont(new Telerik.Documents.Core.Fonts.FontFamily("Arial"), Telerik.Documents.Core.Fonts.FontStyles.Normal, Telerik.Documents.Core.Fonts.FontWeights.Normal, fontData); // fontData is a byte[] keeping the font definition

FontBase font;
bool hasCreatedFont = FontsRepository.TryCreateFont(new FontFamily("Arial"), out font);
 
foreach (TextField field in document.AcroForm.FormFields.OfType<TextField>())
{
    if (hasCreatedFont)
    {
        foreach (var widget in field.Widgets)
        {
            widget.TextProperties.Font = font;
        }
 
        field.TextProperties.Font = font;
    }
}

Wrong header/footer exported when the document's first section is of type continuous.

Currently, NotSupportedEncryptionException is thrown.

Implement Find methods which enable the users to search for a concrete string/content/text in a Pdf document (RadFixedDocument).

When importing a PDF document and parsing a name start character followed by a dictionary end one an exception is thrown: System.InvalidOperationException: 'Stack empty.'

With the current implementation, the permissions are ignored on import.

As a side note, there is an option to set permissions on export: UserAccessPermissions.