[OpenJDK 2D-Dev] [11] Upgrade to Marlin renderer 0.9.1

[Laurent Bourgès]

Phil,
Will you have some time soon to have a look ?

It fixes dashing performance definitively and dash error accumulation too.

Laurent

Le 15 févr. 2018 6:30 PM, "Laurent Bourgès" <bourges.laurent at gmail.com> a
écrit :

> Hi,
>
> Please review this large patch providing Marlin 0.9.1 for JDK 11:
>
> JBS: to be created asap
> webrev: http://cr.openjdk.java.net/~lbourges/marlin/marlin-091.0/
>
> Changes:
> - *ArrayCache: removed clean flag and usage of
> jdk.internal.UNSAFE.allocateUninitializedArray()
> - (D)Curve: added support for lines (curve type 4) + new methods x/y
> Points to compute intersections on clip edges
> - (D)Dasher: use new CurveBasicMonotonizer & CurveClipSplitter to perform
> clipping in Dasher that uses skipLen() to compute properly the dash phase &
> state
> - (D)Helpers: refined precision in cubicRootsInAB (float variant) + add
> fastXXXLen() to quickly estimate curve length from control points
>       moved findSubdivPoints() from (D)Stroker + added findClipPoints() to
> determine t values corresponding to curve intersections with the clip edges
> + added subdivideLineAt() to subdivide line segments
> - (D)MarlinRenderingEngine: disable stroker clipping if dasher clipping
> enabled (2nd clipping is counter-productive) + initialize new path
> simplifier if enabled (disabled by default) + log new settings
> - (D)Renderer: refined [quad/cubic]BreakIntoLinesAndAdd loops to enhance
> accuracy (smaller error related to 2nd ddx/y) with asymetric supixel counts
> - (D)Stroker: use new CurveBasicMonotonizer & CurveClipSplitter (code
> refactoring)
> - (D)TransformingPathConsumer2D: use CurveClipSplitter in PathClipFilter
> to clip filled shapes overlapping clipping edges
>             added CurveClipSplitter that subdivides curves (line, quad,
> cubic) at clip intersections (+ small padding to avoid precision issues)
>             added CurveBasicMonotonizer to monotonize curves (before in
> Stroker) to make it on initial curve in Dasher (more efficient than for all
> dashes)
> - (D)PathSimplifier: new basic path clipper (disabled by default) ignoring
> too small segments (radial distance threshold)
> - ClipShapeTest: improved test to use a small tolerance as clipped curves
> (at clip edges) has minor impact on computed offsets for stroked shapes and
> on dash positions: overall quality is improved as previously larger curves
> had more accumulated error on either dashes or stroke offsets
>
> Build & jtreg tests: OK
>
> Cheers,
> Laurent
>
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