Blurry effect about cefsharp HOT 5 CLOSED

Does this problem also occur in the CEF Sample Application

No

What command line args did you test with? Did you test with the WPF ones?

This sounds exactly like #4565

#4565 (reply in thread)

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Additional context

Yes, the error can be reproduced with the cefclient or cefsimple sample application. However, this means that the blurred display is present.

Looks like you already raised chromiumembedded/cef#3612

However, the effect is NOT present in Chrome and Chromiomembedded.

chromiumembedded/cef#3612 states that the problem does reproduce in CEF.

You need to provide the WPF command line args so the CEF maintainer knows how to reproduce the problem.

It's also possible the specific GPU you are using is part of the equitation.

Closing as upstream.

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Hello amaitland,

you are correct. This is an issue based on the discussion you mentioned #4565

after further examination I can tell you that the blurry effect described is not in:

• chromium embedded
• chromium embedded with the wpf command line args

both times tested with the cefclient.exe (version 118.0.5993 and version 119.4.3).
The issue in chromiumembedded you mentioned was created by me and I hereby would like to revise the statement that the bug can be reproduced in CEF.

So I think the issue is now at the correct repo (CefSharp)

As mentioned above, the problem should be recreatable with any cefsharp sample app with any cefsharp major version higher than 96, by just opening the index.html I attached.
If needed I have attached such a sample app.

I tested it on at least three different computers with different gpus, so this should not be root of the problem.

CefSharpTest.zip

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Good morning.
Would there be another opportunity to deal with my problem?
Thank you very much.

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See https://github.com/cefsharp/CefSharp/wiki/Frequently-asked-questions#roundingbitmapscaling

You can also try https://learn.microsoft.com/en-us/dotnet/api/system.windows.uielement.snapstodevicepixels?view=windowsdesktop-8.0

If your still having a problem then you'll need to debug the rendering implementation

• https://github.com/cefsharp/CefSharp/blob/cefsharp/120/CefSharp.Wpf/Rendering/WritableBitmapRenderHandler.cs#L54
• https://github.com/cefsharp/CefSharp/blob/cefsharp/120/CefSharp.Wpf/Themes/Generic.xaml

You can create bitmaps for each individual frame and write them to disk for diagnostic purposes, you can adapt code from https://github.com/cefsharp/CefSharp/blob/cefsharp/120/CefSharp.OffScreen/BitmapBuffer.cs and hook into the WPF render handler.

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