[jdk17u-dev] RFR: 8294680: Refactor scaled border rendering

[Goetz Lindenmaier]

On Mon, 22 Sep 2025 15:36:27 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

> I backport this to make later backports more simple. 
> We should keep 17 up to date, especially in awt/javax where
> subtle bugs can annoy users.
> 
> I had to resolve SwingUtilities3.java as two later changes were already backported,
> see History of [17](https://github.com/openjdk/jdk17u-dev/commits/master/src/java.desktop/share/classes/com/sun/java/swing/SwingUtilities3.java)  compared to [21](https://github.com/openjdk/jdk21u-dev/commits/master/src/java.desktop/share/classes/com/sun/java/swing/SwingUtilities3.java)
> 
> The file is now at the level of 21, except for  [8285306: Fix typos in java.desktop](https://github.com/openjdk/jdk21u-dev/commit/2a799e5c82395919b807561da4a062e0fe6da31d)
> 
> I ran the following tests, selected my name:
> 
> test/jdk/javax/swing/JComboBox/JComboBoxWithTitledBorderTest.java
> test/jdk/javax/swing/JInternalFrame/InternalFrameBorderTest.java
> test/jdk/javax/swing/JMenuBar/MisplacedBorder
> test/jdk/javax/swing/JTree/8041705/DefaultTreeCellRendererBorderTest.java
> test/jdk/javax/swing/border
> test/jdk/javax/swing/plaf/metal/MetalBorders
> test/jdk/javax/swing/plaf/nimbus/TestDisabledToolTipBorder.java
> test/jdk/javax/swing/plaf/synth/TitledBorderLabel.java
> 
> Related issues mentioned in the bug are either backported or on my list.

Thanks for the review!

I think we should more often backport changes as [8285306: Fix typos in java.desktop](https://github.com/openjdk/jdk21u-dev/commit/2a799e5c82395919b807561da4a062e0fe6da31d)  to avoid they spoil clean backports. 

But it is common practice to not include such small edits of other changes in backports.

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/3984#issuecomment-3323966823