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Unsupported Features

Unsupported Content

The unsupported features include:

  • Type3 fonts.

  • Almost all fonts that are embedded in the PDF file should be displayed correctly. There are minimal limitations with some font formats.

  • There are some limitations with CCITTFaxDecode filter.

  • Lab, ICCBased.

  • Encrypted documents when a non-standard encryption method is used, or the document is password-protected.

  • JPXDecode filter: This filter does not work out of the box. However, there is API allowing to plug-in custom user-defined filters. This API is described in the Customize PDF Rendering topic and an SDK example showing the approach is available in our SDK repository on GitHub.

  • Annotations: Link and Widget annotations are supported. All others are currently not implemented.

  • Structured content: There are several ways to define structured content in a PDF file. RadPdfViewer does not support document outline and article threads. The interactive forms are currently read-only.

When a PDF file contains some of these items, it may be shown incorrectly or not shown at all.

See Also