RFR: 8326027: Comparing buffered images of white background frame fails in Mac

[Tejesh R]

On Mon, 2 Sep 2024 04:48:54 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

> Why are we extending this test to be run on Mac now? Looks like it was Linux specific test.
> 
> Also Title "Comparing buffered images of white background frame fails in Mac" makes it looks like some product issue. But changes are related to a single test, if we are making single test related changes its better to have [Testbug] or test in the title instead of issue description.
> 
> This color comparison failure is happening when we are checking boundary pixels of a window or is it happening everywhere?

1. The product fix was linux specific, yet I guess there were review suggestions  on extending the test to other  OS. Hence while testing on other platforms few issues w.r.t OS for this test was observed and JBS was raised (For Windows - [JDK-8326026](https://bugs.openjdk.org/browse/JDK-8326026) - Mouse drag for a transparent frame fails in Windows) 
2. Will update the title.
3. Its not happening at borders, its at random places, u can refer to the image attached in JBS.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/20760#issuecomment-2323813345