[OpenJDK 2D-Dev] RFR[14]: JDK-8230728 : Thin stroked shapes are not rendered if affine transform has flip bit

[Phil Race]

Approved.

-phil.

On 9/6/19 2:15 PM, Laurent Bourgès wrote:
> Hi,
>
> Please review this bug fix for the Marlin renderer (present in Pisces 
> code since JDK 6?):
> JBS: https://bugs.openjdk.java.net/browse/JDK-8230728
> webrev: http://cr.openjdk.java.net/~lbourges/marlin/marlin-8230728.0/
>
> This patch fixes a NaN handling in userSpaceLineWidth() when the 
> affine transform determinant is negative (flip bit is ON)
>
> Changes:
> - MarlinRenderingEngine: use abs(at.getDeterminant()) to ensure 
> positive value before using sqrt
> - FlipBitTest: new jtreg test reproducing the original problem drawing 
> a thin ellipse with a flipped transform
>
> Cheers,
> Laurent

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