[9] Review request for 8159892: Ubuntu 16.04: invalid rendering of FX app stage in case of scaling

[Jim Graham]

New webrev: http://cr.openjdk.java.net/~flar/JDK-8159892/webrev.01/

This one makes the presence of the new functions being used optional.  Details are in JBS.

With respect to my comment below about the consistency of declarations and definitions, there didn't seem to be much 
consistency in the order of things as it exists so I moved a couple of the functions purely for my own OCD enjoyment, 
but didn't sweat the details too much...

			...jim

On 8/9/16 6:41 PM, Jim Graham wrote:
> Bug: https://bugs.openjdk.java.net/browse/JDK-8159892
> webrev: http://cr.openjdk.java.net/~flar/JDK-8159892/webrev.00/
>
> There are a number of bugs filed on this, or very similar issues as well - all related to broken DPI scaling on GTK3.
>
> It looks like there is a simple way of disabling automatic scaling for GTK3 so we can do our own (which has been working
> fairly well so far for GTK2 and is preferable to the integer-operation scaling we'd get automatically via the
> integer-dominated APIs of GDK/GTK).
>
> Questions:
>
> - Is this the best bug ID to use for this fix?  I used it as it was the first one that I looked at and it had screen
> shots of the problem that immediately pointed me to the underlying problem.  Other bugids are mentioned in the bug
> report as being "possible dups" and most of them should be a duplicate, but so far I've only tested the test case shown
> in the screen shots of 8159892...
>
> - The new function is specifically in 3.10 of the GTK 3 libraries.  Should I add additional protections in case a system
> has an earlier 3.XX version of GTK3?
>
> - Minor note - I discovered after publishing the webrev that the function is defined, declared, loaded and stubbed in
> inconsistent locations in the list of functions - not really an issue, but I'll try to normalize where it appears in all
> of the various function lists if I have to recut the webrev...
>
>                 ...jim