[OpenJDK 2D-Dev] [OpenJDK Rasterizer] Path2d needRoom very slow for huge paths

[Laurent Bourgès]

Andrea,

>> Do you have a fast and efficient polygon clipper in geoserver ?
>
>
> We use this one for fast rectangular clipping:
>
https://github.com/geotools/geotools/blob/master/modules/library/main/src/main/java/org/geotools/geometry/jts/GeometryClipper.java

Thanks for the link,
It seems I could try implementing my own rectangle clipper without any
array allocation using marlin's array caches...

I may look at this implementation to get some idea or maybe I should just
optimize openjdk's Area class that has also a clipping implementation but
is known too be very slow as the shape complexity increases !

Jim, could you point all clipping implentations in openjdk (java or c) that
I can study to create my own ?

PS: could you try my openjdk's marlin patch ?
Just get and build the graphics rasterizer repository to have openjdk9 +
marlin...

Cheers,
Laurent
>
> It was introduced exactly because java2d does not do that, and can lead
to OOM easily with large
> shapes united with a dasharray stroke.
>
> Cheers
> Andrea
>
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