fltk / gl rendering problem

[marco atzeri]

Il 6/16/2013 4:51 PM, marco atzeri ha scritto:
>
>
> Hi,
> testing a octave/fltk graphics issue, I noticed that also the
> demo of fltk with GL interface has a similar issue.
>
> On http://matzeri.altervista.org/works/fltk_gl/
> I uploaded the before and after apperance of "gl_overlay" demo.
>
> It is enough to move the window to loose the geometrical
> image while the bars are correctly re-drawn.
>
> Running Xwin with -wgl does not show such defect, but it is
> terribly slow. So I assume it is not a fltk defect but of
> GL or XServer.
>
> A copy of gl_overlay from fltk-1.3.1.9857-1 build is also uploaded.
>
>
> Regards
> Marco
>

further experiment showed that the defect is present when the integrate
windows manager is used. With external window manager (fvwm, openbox,.. 
) that defect does not apper.

With external window manager another defect appears, the upper
bar effect is not shown at all; while it is present on the integrated
window manager.

Regards
Marco


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