Win10 system screen zoom layout setting 150%, the operation

[Czarek]

What is the value of --device-scale-factor switch passed to browser and renderer processes in OnBeforeCommandLineProcessing callback?

[dtanzer]

There is no value for "device-scale-factor", but "force-device-scale-factor" has the value I provided when I use the following code:

String[] args = {"--disable-gpu", "--disable-gpu-compositing", "--force-device-scale-factor=1"};
cefApp = CefApp.getInstance(args, settings);
cefApp.addAppHandler(new ApplicationHandler(args));

Now it also has an effect, but not the desired one...
No scale factor argument:

no_scale_factor.png (21.79 KiB) Viewed 24349 times

Scale factor 1:

scale_factor_1.png (16.88 KiB) Viewed 24349 times

Scale factor 4:

scale_factor_4.png (27 KiB) Viewed 24349 times

[magreenblatt]

What Java version are you using? Part of the problem is that DPI support wasn't added until Java 9, and JCEF has not been updated to take advantage of the new Java APIs. You can try searching the internet for "java DPI scaling hack" and see if any of those work for you.

[dtanzer]

NOW we're on to something:

scaled_correctly.png (17.9 KiB) Viewed 24340 times

Yes, I am using Java 12. And I think I have found a solution that's backwards compatible. You'll get a pull request once my bitbucket account is working again...

[dtanzer]

PR is out: https://bitbucket.org/chromiumembedded/ ... actor/diff

[guich]

Hi,

I'm using jdk 8. Is there a way to make the window/browser scale-to-fit?

I tried all parameters described in this post but there's no change at all in the scale of the browser.

thanks

guich