RFR: 8341381: Random lines appear in graphic causing by the fix of JDK-8297230

[Laurent Bourgès]

On Sun, 5 Oct 2025 22:16:29 GMT, Laurent Bourgès <lbourges at openjdk.org> wrote:

> - Fix cubic offsetting artefacts (sort cubic roots + fixed numerical accuracy problem in ROC^2-w^2 = 0 solver + fixed EliminateInf)
> - Restored lower precision using ulp(float) in point, line or flat bezier curve checks

Please review this fix...

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PR Comment: https://git.openjdk.org/jdk/pull/27641#issuecomment-3398277799