WinAnsiEncoding it is imported as StandardEncoding since WinAnsiEncoding is still not implemented in RadPdfProcessing. 

Current implementation relies on valid cross-reference offsets in the PDF documents so that PDF objects are easily found and parsed. However, we can implement a mechanism for repairing documents with invalid cross-reference tables.

The attached project shows how to repair the simplest case of cross-reference table by using RepairDocumentWithSimpleCrossReferenceTable method.

Add support for documents with an invalid stream cross-reference table

This operator is used for drawing shading patterns.

PDF/UA (PDF/Universal Accessibility) is the informal name for ISO 14289, the International Standard for accessible PDF technology.

When there is a destination object in a RadFixedDocument and it doesn't have page set (it is null), an exception is thrown. However, this is supported by Adobe and it is not forbidden in the Pdf specification.

Currently adding an Image content element with ImageSource instantiated with a PNG file format leads to NotSupportedException: 'Can not export other than Jpeg and Jpeg2000 and ImageQuality different than High', when exporting the document.

Support for adding PNG images and exporting to PDF should be implemented for PdfProcessing for .NET Standard scenario.

Exception when the endstream is no on a new row 

When merging files that contain the "159 '\u009f'" char, ArgumentException("The encoding is not supported.") is thrown.

Workaround:

Use PdfFormatProvider.

Implement GetColor method for Indexed color space

RadPDfProcessing: Exception when parsing a Tiling pattern with non-rgb color.

Currently, PdfStreamWriter writes only PDF pages.

If we implement API for merging multiple pages or whole documents we would be able to preserve links between pages (which are currently being corrupted).

Merging whole documents would also allow preserving document properties (bookmarks, interactive forms, ...). For a more detailed list of the unsupported document properties you can refer to our documentation: https://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/formats-and-conversion/pdf/pdfstreamwriter/features.

We may also implement API for adding initial document properties from some existing PDF file.

When the bookmarks are declared as objects instead of a string they are not visible.

The exception is thrown with the message "Password is not correct" even when the user password is correct. This issue occurs for specific encryption algorithm parameters only.

By specification, the InteractiveForm fields can have the same name if they are descendants of a common ancestor. Such fields are different representations of the same underlying field; they should differ only in properties that specify their visual appearance. When such a document is imported an ArgumentException: 'An item with the same key has already been added.' is thrown.

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

Import/export and API for creating page ArtBox should be added.

When a document is imported the FontsRepository caches the created font instances for performance reasons. API should be provided for clearing the cached instances in order to reduce memory consumption.

If the font family name is defined using a language other than English, the font is not applied to the content. This also can affect the performance as the font is read but it is not registered in the FontsRepository.

We would like to search a PDF document for specific text and returns its position. We generate PDF reports using Telerik Reporting which contain placeholders that are replaced with images and text at run-time. It appears the logic has already been implemented, but the implementing classes (e.g., TextSearch, TextRecognizer) aren't accessible. Please consider making this capability available.