Tint transformation function is used to transform Device N color in Alternate colorspace.
By using "Auto Detect Hyperlink" functionality RadPdfViewer should detect URLs and email addresses and turn them into hyperlinks. For instance if the PDF file contains text http://www.telerik.com/ this text should become a hyperlink.
There is a similar question in FAQ for FontForge (https://fontforge.github.io/faq.html#mingliu) where it is described that kaiu.ttf (and probably mingliu.ttf) font does not store the correct outlines and its outlines need special treatment in order to be rendered correctly. The Chinese glyphs are rendered wrong in RadPdfViewer as well. However, Adobe Reader, FoxitReader and ChromeViewer render the glyphs correctly.
Currently, the disabling of the scrolling functionalities in PdfViewer is pretty tricky. Expose an API that allows users to control this functionality easier (hiding the scroll bars, disabling horizontal and/or vertical scrolling). A sample of how the scrolling could be completely disabled is attached to this item.
Document cannot be loaded because the Encrypt property is not set and is null.
The performance of loading the thumbnails is decreased with the removing of the cache in PdfViewer. Possible reason is that the pages are no longer loaded asynchronously. Steps to reproduce: - Open the SDK with the thumbnails for PDFViewer. - Notice that the load of the thumbnails is slow.
All annotations are missing because ArgumentNullException is thrown while importing page annotations. The exception is handled and all non-annotation related pdf content is loaded successfully.
This usually results in a single colored rectangle instead of a gradient filled rectangle. Available in R1 2018 SP2 release version.
The ActionsManager.ExecuteUri method throws exception when tries to open relative Uri. As the exception is caught, with the current state no action is observed when interacting with such link in RadPdfViewer.
Some glyphs are not rendered correctly - the letter are translated or become unrecognizable.
GoToPage() method is not working correctly in some cases when called in DocumentChanged event handler. The known cases are described below: 1. When RadPdfViewer and the document are loaded initially and document is set through the RadPdfViewer.Document property. Workaround: DocumentSource property could be set (in XAML or in code-behind) instead of the Document property. If the Document property is used, this should be done after RadPdfViewer is loaded. 2. When the ScaleMode is changed in DocumentChanged event handler and then GoToPage() method is called in the same event handler.
When text is exported from PDF document using the TextFormatProvider (it's also used internally for the Copy operation), it is automatically split to lines using the vertical position of the words on the page, and small tolerance. Currently the tolerance is hard-coded to 0.1 pixels, which is not suitable for documents which contains scanned and OCR-ed text, and there the text lines could be slightly inclined. The result is that words on one slightly inclined line are recognized as if they are on separate lines.
Matte color is used for preblending images with some background color, using the SMask. Matte color is specified using the optional 'Matte' entry for the SMask object. See PDF 1.7 specification, page 554-555: Matte array (Optional; PDF 1.4) An array of component values specifying the matte color with which the image data in the parent image has been preblended. The array consists of nnumbers, where n is the number of components in the color space specified by the ColorSpace entry in the parent image’s image dictionary; the numbers must be valid color components in that color space. If this entry is absent, the image data is not preblended.
This allows specifying a soft mask in the external graphics state.
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.
"Save As" is common functionality in most of the popular PDF Viewers. It should save the currently loaded document to a file. Workaround: Currently there is SDK demonstrating how to add such functionality: https://github.com/telerik/xaml-sdk/tree/master/PdfViewer/PdfViewerCustomSaveCommand Available in R3 2017 Official Release Version.
A pop-up annotation displays text in a pop-up window for entry and editing. It typically does not appear alone but is associated with a markup annotation (its parent annotation) and is used for editing the parent’s text.
Implement import and export of content with Type0Font with GBK-EUC-H encoding.