RFR: 8280482: Window transparency bug on Linux [v2]

[Alexander Zvegintsev]

On Thu, 20 Jul 2023 17:32:13 GMT, Tejesh R <tr at openjdk.org> wrote:

> shows same for all the windows, either in primary/secondary monitor.

For me it is not true:

[GCBounds.java.txt](https://github.com/openjdk/jdk/files/12113425/GCBounds.java.txt)

> Screen bounds java.awt.Rectangle[x=0,y=0,width=2560,height=1440]
Frame gc bounds: java.awt.Rectangle[x=0,y=0,width=2560,height=1440]
Screen bounds java.awt.Rectangle[x=2560,y=0,width=1920,height=1200]
Frame gc bounds: java.awt.Rectangle[x=2560,y=0,width=1920,height=1200]

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PR Review Comment: https://git.openjdk.org/jdk/pull/14825#discussion_r1269873449