Re: [NTG-context] clipping problem

10 Jul 2006

      Hans Hagen wrote:
...
Peter Rolf wrote:
...
Just as a reminder for an unsolved problem :)
I also tested this on contextgarden, with faulty result. Same with
\clip[hoffset=64bp,voffset=64bp,width=64bp,height=64bp]{\reuseMPgraphic{cliptest}}
So it doesn't look like a rounding problem.
this clips ok here (only one color-clips) so maybe a viewer problem?
I attached the final pdf and a screenshot out of acrobat viewer (v7.08,
Win XP) at 300%. If you zoom the screenshot at the top/right edges of
the clipped boxes, you can clearly see that there is something wrong.
Maybe a viewer problem, as 'foxit reader' shows the same glitches at
lower zoomlevel, but not at higher zoomlevel. Acrobat Viewer shows them
even at 6400%. Mhh, I will test this on another computer.

Thanks anyway,

Peter
...
...
Peter Rolf wrote:
...
Hi,
I have some png-graphics, where several (equal sized) icons are arranged
in array form. When I cut out an icon, I get the icon gfx plus a very
small part from the surronding icon(s). The attached file shows, that
the same problem occurs when using a vector based graphic.
Normally I use imagemagic to seperate such files into single gfx, so
this is not a serious problem for me. But if this is a bug, it should be
fixed (or if I have missed something, let me know).
Greetings, Peter
------------------------------------------------------------------------
% interface=en output=pdftex
% Time-stamp: 
%
\setupcolors[state=start]
\startreusableMPgraphic{cliptest}
  path p ;
  u:= 64bp ;
  p:= unitsquare xyscaled(u,u) ;
fill p withcolor green ;
  fill p xshifted u  withcolor blue ;
  fill p xshifted 2u withcolor green ;
fill p yshifted u     withcolor blue ;
  fill p shifted (u,u)  withcolor red ;
  fill p shifted (2u,u) withcolor blue ;
fill p shifted (0,2u)  withcolor green ;
  fill p shifted (u,2u)  withcolor blue ;
  fill p shifted (2u,2u) withcolor green ;
\stopreusableMPgraphic
\starttext
\reuseMPgraphic{cliptest}
\blank
\setupclipping[nx=3,ny=3]
\clip[x=1,y=1]{\reuseMPgraphic{cliptest}}
\blank
\clip[x=2,y=2]{\reuseMPgraphic{cliptest}}
\blank
\clip[x=2,y=3]{\reuseMPgraphic{cliptest}}
\stoptext
%%% Local Variables:
%%% mode: context
%%% TeX-master: ""
%%% End:
------------------------------------------------------------------------
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