RFR: JDK-8365426 : [macos26] Graphics2D tests fail on new macOS 26

[Damon Nguyen]

On Thu, 13 Nov 2025 23:20:18 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> This test started to fail on macOS26 due to color inconsistency at certain points.
> Color tolerance has been added as a fix.
> 
> The color tolerance for the dominant component (eg Color.RED - dominant component is red) is set less (delta /PRIMARY_TOLERANCE = 2) and for non-dominant (For Color.RED - Green and Blue are non-dominant) is set more (delta / TOLERANCE=30). This ensures we are checking for shades (brighter/lighter) of the expected color.
> 
> Since the issue is only seen on macOS, I have set both PRIMARY_TOLERANCE & TOLERANCE to 2 on other platforms to keep the test almost close to the original one.
>  
> Tested locally on macOS 26.0.1 and 26.1 and fix works as expected.
> 
> CI testing on other platforms looks good and no regressions are observed (Link added to JBS).

Tolerances seemed to do the trick. Tested on my various devices (including the macOS 26 machine I originally found this issue on) and this passes now. I wonder what in macOS 26 causes the slight color variances when other OS's (including previous macOS versions) don't have this issue.

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Marked as reviewed by dnguyen (Committer).

PR Review: https://git.openjdk.org/jdk/pull/28312#pullrequestreview-3462334105