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

[honkar-jdk]

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).

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Issue

• JDK-8365426: [macos26] Graphics2D tests fail on new macOS 26 (Bug - P4)

Reviewers

• Alexander Zuev (@azuev-java - Reviewer)
• Damon Nguyen (@DamonGuy - Committer)

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[openjdk]

@honkar-jdk This change now passes all automated pre-integration checks.

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

Reviewed-by: kizune, dnguyen

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At the time when this comment was updated there had been 2 new commits pushed to the master branch:

• 0d8b518: 8364560: The default value of --linux-menu-group option is invalid
• 155d7df: 8371749: New test serviceability/jvmti/events/VMDeath/AllocatingInVMDeath/TestAllocatingInVMDeath.java fails with -Xcheck:jni

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[mlbridge]

Webrevs

• 00: Full (b4f84a19)

[azuev-java]

Looks good.

[DamonGuy]

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.

[honkar-jdk]

/integrate

[openjdk]

Going to push as commit 7c169c9.
Since your change was applied there have been 25 commits pushed to the master branch:

• bc928c8: 5038439: Warning message for literal shift amounts outside the canonical domain
• 7aff8e1: 8371319: java.lang.reflect.Method#equals doesn't short-circuit with same instances
• ad3dfaf: 8360564: Implement JEP 524: PEM Encodings of Cryptographic Objects (Second Preview)
• ... and 22 more: https://git.openjdk.org/jdk/compare/6322aaba63b235cb6c73d23a932210af318404ec...master

Your commit was automatically rebased without conflicts.

[openjdk]

@honkar-jdk Pushed as commit 7c169c9.

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