PDF print looks different (chrome vs cef)

[AlexMaptek]

Hi, I have a WPF application that is using CefSharp to display PDFs to users.

It works well but an issue was discovered with the attached PDF when printing. On the second page there is a red dot with rings around it. If you print the PDF from chrome (I'm currently on 76.0.3809.100) the rings around the red dot print correctly. If however you print from the CefSharp (75.1.14) viewer the rings do not print.

There are also some more rings on the "Wet side lengths" legend on page 2 as well. These seem to be getting printed scaled down and offset left and up. Refer to images of printed PDFs:

Bad

Print_Bad.JPG (64.94 KiB) Viewed 5654 times

Good

Print_Good.JPG (64.99 KiB) Viewed 5654 times

Any thoughts on what could be causing this?

[Czarek]

You are comparing different Chrome != CEF version. You can test with latest CEF by downloading "Sample application" from: http://opensource.spotify.com/cefbuilds/index.html

[AlexMaptek]

It is interesting - I downloaded the sample at 75.1.14 and it worked correctly.

I looked through the example code and it did not seem to be doing anything special relating to printing so I'm not sure what is going wrong.

[amaitland]

You need to test with cefclient --multi-threaded-message-loop --off-screen-rendering-enabled --enable-gpu for a more accurate comparison of the WPF version.

What you are seeing maybe the same as https://github.com/cefsharp/CefSharp/issues/2409

If that is the case you may need to look at using a different CEF wrapper, CefGlue or ChromiumFx are alterntives