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  1. JDK
  2. JDK-8230728

Thin stroked shapes are not rendered if affine transform has flip bit

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    • b16

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      Description

        ICEpdf team reported a rendering issue in Marlin renderer (the bug comes from Pisces code) due to at.getDeterminant() is negative in userSpaceLineWidth() that leads to a NaN stroke width:
        https://github.com/bourgesl/marlin-renderer/issues/36

        "Debugging MarlinRenderingEngine, execution steps into line 208:
        widthScale = (float)Math.sqrt(at.getDeterminant());
        In our scenario, at.getDeterminant() returns the value -0.47389273965262657 and widthScale and thus the value returned by userSpaceLineWidth(AffineTransform, float) is NaN.

        Using the absolute value of at.getDeterminant(), the lines seem to get rendered correctly, the value returned by userSpaceLineWidth(AffineTransform, float) then is 0.18158083"

        After investigation, using the absolute value (before sqrt) is the right solution.

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8231621 Thin stroked shapes are not rendered if affine transform has flip bit

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8231771 Thin stroked shapes are not rendered if affine transform has flip bit

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8232669 Thin stroked shapes are not rendered if affine transform has flip bit

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8269509 Thin stroked shapes are not rendered if affine transform has flip bit

            • P3 - Major loss of function.
            • Resolved

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                lbourges Laurent Bourgès
                lbourges Laurent Bourgès
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