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2
Votes

Dynamic Stamp text not preserved after saving in Blazor PDF Viewer

Description

When a Dynamic Stamp is added to a document, its text(user name and date) is correctly scaled and fully visible in the viewer.However, after saving or exporting the PDF(even if all annotations are flattened), the font size of the text changes, it becomes larger and parts of the text, such as the date, are no longer visible inside the stamp.This means that the appearance of the Dynamic Stamp is not preserved after saving.

Steps to Reproduce

Open a PDF in SfPdfViewer.

Add a Dynamic Stamp with user name and date.

Resize the stamp to a smaller rectangle.

Open the saved PDF, the stamp text is now mis-scaled and the date is truncated.

Expected Behavior

The font of the user name and date inside the Dynamic Stamp should scale proportionally to the stamp rectangle and remain visually identical after saving, flattening, or reopening the file.

Actual Behavior

After saving, the text in the Dynamic Stamp is re-rendered at the wrong size and becomes partially invisible.

Workarounds Tried

Flattening all annotations before saving.

Manually drawing the annotations appearance (GetImages and PdfBitmap).

Both approaches preserve the image but require custom rendering.

The built in Dynamic Stamp should ideally maintain its scaled font automatically.