8369335: Two sun/java2d/OpenGL tests fail on Windows after JDK-8358058

[rm-gh-8]

Backporting JDK-8369335: Two sun/java2d/OpenGL tests fail on Windows after JDK-8358058.

This PR fixes two OpenGL tests (ScaleParamsOOB.java and OpaqueDest.java) fail after JDK-8358058 with color mismatch errors due to HiDPI fractional scaling issues when using OpenGL with hardware acceleration. Tests updated to handle Windows HiDPI fractional scaling correctly.

For parity with Oracle JDK.

Ran related tests on linux-x64, linux-aarch64, macos-aarch64 and windows-x64:

make test TEST=test/jdk/sun/java2d/OpenGL/OpaqueDest.java
make test TEST=test/jdk/sun/java2d/OpenGL/ScaleParamsOOB.java

Note: test/jdk/sun/java2d/OpenGL/ScaleParamsOOB.java fails on linux-x64 and linux-aarch64 (using xvfb and libmesa software rendering) with a color mismatch error (expected=ffff0000 actual=ff000000 at x=40 y=40), similar to the error resolved in this PR, but remains unaddressed since to JDK-8358058. Created JDK-8377908 to capture the issue.

Results attached:

macos-aarch64-specific-test.log
macos-aarch64-specific-2-test.log
windows-x64-specific-test.log
windows-x64-specific-2-test.log
linux-x64-specific-test.log
linux-x64-specific-2-test.log
linux-aarch64-specific-test.log
linux-aarch64-specific-2-test.log

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8369335 needs maintainer approval

Issue

• JDK-8369335: Two sun/java2d/OpenGL tests fail on Windows after JDK-8358058 (Bug - P4 - Approved)

Reviewing

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$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/265/head:pull/265
$ git checkout pull/265

Update a local copy of the PR:
$ git checkout pull/265
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/265/head

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Checkout this PR locally:
$ git pr checkout 265

View PR using the GUI difftool:
$ git pr show -t 265

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Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/265.diff

Using Webrev

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[bridgekeeper]

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[openjdk]

@rm-gh-8 This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8369335: Two  sun/java2d/OpenGL tests fail on Windows after JDK-8358058

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 6 new commits pushed to the master branch:

• 57ea04c: 8367302: New test jdk/jfr/event/profiling/TestCPUTimeSampleQueueAutoSizes.java from JDK-8366082 is failing
• f51b93e: 8376688: Gtest os.attempt_reserve_memory_between_small_range_fill_hole_vm fails on AIX 7.3
• 5cac27d: 8359868: Shenandoah: Free threshold heuristic does not use SoftMaxHeapSize
• ... and 3 more: https://git.openjdk.org/jdk25u-dev/compare/72d3ed26333140602f75aedfccdfb3a1a63da1ab...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 02: Full - Incremental (492a4377)
• 01: Full - Incremental (bf01b645)
• 00: Full (bf01b645)

[rm-gh-8]

/approval request for backport of JDK-8369335: Two sun/java2d/OpenGL tests fail on Windows after JDK-8358058.

This test fix addresses issues introduced by JDK-8358058, which was added for Oracle JDK parity.

Note: test/jdk/sun/java2d/OpenGL/ScaleParamsOOB.java fails on linux-x64 and linux-aarch64 (using xvfb and libmesa software rendering) with a color mismatch error (expected=ffff0000 actual=ff000000 at x=40 y=40), similar to the error resolved in this PR, but remains unaddressed since to JDK-8358058. Created JDK-8377908 to capture the issue.

[openjdk]

@rm-gh-8
8369335: The approval request has been created successfully.

[openjdk-notifier]

The parent pull request that this pull request depends on has now been integrated and the target branch of this pull request has been updated. This means that changes from the dependent pull request can start to show up as belonging to this pull request, which may be confusing for reviewers. To remedy this situation, simply merge the latest changes from the new target branch into this pull request by running commands similar to these in the local repository for your personal fork:

git checkout JDK-8369335-V25
git fetch https://git.openjdk.org/jdk25u-dev.git master
git merge FETCH_HEAD
# if there are conflicts, follow the instructions given by git merge
git commit -m "Merge master"
git push

[rm-gh-8]

/integrate

[openjdk]

@rm-gh-8
Your change (at version 492a437) is now ready to be sponsored by a Committer.

[phohensee]

/sponsor

[openjdk]

Going to push as commit 6a95907.
Since your change was applied there have been 6 commits pushed to the master branch:

• 57ea04c: 8367302: New test jdk/jfr/event/profiling/TestCPUTimeSampleQueueAutoSizes.java from JDK-8366082 is failing
• f51b93e: 8376688: Gtest os.attempt_reserve_memory_between_small_range_fill_hole_vm fails on AIX 7.3
• 5cac27d: 8359868: Shenandoah: Free threshold heuristic does not use SoftMaxHeapSize
• ... and 3 more: https://git.openjdk.org/jdk25u-dev/compare/72d3ed26333140602f75aedfccdfb3a1a63da1ab...master

Your commit was automatically rebased without conflicts.

[openjdk]

@phohensee @rm-gh-8 Pushed as commit 6a95907.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.