RFR: 8211294: ScrollPane content is blurry with 125% scaling [v6]

[Kevin Rushforth]

On Tue, 5 Jan 2021 07:27:47 GMT, Frederic Thevenet <fthevenet at openjdk.org> wrote:

>>> At which screen scale did you observe this?
>> 
>> Both border clip and font spacing issues are observed only at 125% scale.
>> 
>> 
>>> Update: If I run your test program using a build directly from the target branch, I see what you are seeing with the clipped tab pane border. That is likely an unrelated bug that has since been fixed.
>> 
>> I also see same behavior. Border clip issue does not occur with latest code but the difference in font spacing is observed(only at 125%)
>
> I'm suspecting that the this fix might be revealing a issue related to [JDK-8199592](https://bugs.openjdk.java.net/browse/JDK-8199592).
> Keeping in mind that the revision on which this fix is based does *not* include the fix for JDK-8199592, a way to confirm that would be to rebase that fix on top of the latest rev and see if the test program still exhibits the same behaviour.
>  I'll try to do that later on today.

@fthevenet The truncated line is very likely related to the fix for [JDK-8199592](https://bugs.openjdk.java.net/browse/JDK-8199592). I always merge in the latest master when doing my testing, which is why I initially didn't see that particular problem.

The text spacing is a different problem, since the altered behavior after applying your fix happens with or without the fix for JDK-8199592. It seems likely that it is a separate bug exposed by the fix for this bug rather than caused by it.

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PR: https://git.openjdk.java.net/jfx/pull/308