2014-06-21 18:05 GMT+02:00 Hilaire Fernandes <hilaire.fernandes@gmail.com>:

I try a direct use of this method, and the same problem occurs under
Wine/Windows.

Is ti a problem with native boost? Is it different Cairo lib used for
Linux and Windows/Mac VM?

Hilaire

arcCenterX: xc centerY: yc radius: radius startAngle: angle1 endAngle:
angle2
�� <primitive: #primitiveNativeCall module: #NativeBoostPlugin error:
errorCode>

�� self nbCall: #(void cairo_arc (AthensCairoCanvas context,
�� double xc,
�� double yc,
�� double radius,
�� double angle1,
�� double angle2) )

--
Dr. Geo http://drgeo.eu
iStoa - https://launchpad.net/istoa

I think this is a bug on cairo. The strange rendering only happens on strokes,

not on solids fills and not on stroke with dashes:

| view |
view�� := AthensSceneView new.
view extent:600@600.
view scene: [:canvas | |path|
�� path:= canvas createPath:[:builder |
�� builder absolute.
�� builder moveTo: -100@300.
�� builder cwArcTo:300@300 angle:Float pi.
�� ].
��
�� canvas surface clear:�� Color black.
�� canvas setPaint: Color red.
�� canvas setShape:path.
�� canvas draw.
�� (canvas setStrokePaint: Color green) width:2.
�� canvas draw.
�� (canvas setStrokePaint: Color yellow) width: 2;dashes:#( 3 3) offset:0.
�� canvas draw.
].
view openInWindow.