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https://issues.apache.org/jira/browse/NETBEANS-3468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17013573#comment-17013573
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Eirik Bakke commented on NETBEANS-3468:
---------------------------------------
I did some experiments with this. For retina icons to work in the main menu bar
on Aqua/MacOS, the icon must be an ImageIcon based on a MultiResolutionImage.
Any MultiResolutionImage implementation will do; it does not have to be an
instance of BaseMultiResolutionImage. The main challenge is that
MultiResolutionImage did not get introduced as a public API until Java 9 (prior
to which it was located in sun.awt.image.MultiResolutionImage), and the
NetBeans build system requires NetBeans sources to compile on Java 8. That
could be solved with some reflection magic.
> Make HiDPI (Retina) icons work in MacOS menu bar
> ------------------------------------------------
>
> Key: NETBEANS-3468
> URL: https://issues.apache.org/jira/browse/NETBEANS-3468
> Project: NetBeans
> Issue Type: Improvement
> Components: platform - Other
> Affects Versions: 11.3
> Environment: MacOS with retina display
> Reporter: Eirik Bakke
> Priority: Minor
> Labels: HiDPI
> Attachments: menuicon_retina.png
>
>
> HiDPI icons, introduced in NETBEANS-2614 and NETBEANS-2604, do not yet show
> up in the correct resolution when used in the menu bar on MacOS. See the
> attached screenshot (from a NetBeans Platform application). This should be
> fixed.
> Note that we have only so far introduced HiDPI icons for the "Undo" and
> "Redo" actions.
> Emilian Bold probably figured this out in his earlier experimental Retina
> support branch; see RetinaMultiResolutionImage in
> https://github.com/emilianbold/nextbeans/commit/0f99dba0c1b3e8e0bc4e7cec407b53d30e85ead1
> . If the solution involves implementing MultiResolutionImage, then make sure
> not to do this on Windows (to avoid
> https://bugs.openjdk.java.net/browse/JDK-8212226 ).
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