[Ipe-discuss] Antialiasing, delete

Johan Ingvast ingvast at md.kth.se
Wed Dec 14 13:12:48 CET 2005

Otfried Cheong wrote:
>>On Debian stable, with hand compiled qt 4.0.1, I can see perhaps very
>>slight improvement in rendering (especially circles, but it is so slight
>>I may be imagining it) with absolutely no noticeable difference in
> After some changes in rendering text, my Linux system now no longer has
> the slowdown-problem.  I still don't know what caused it in the first
> place, but it seems the problem is gone and we can simply enable
> double-buffering (it does indeed improve the appearance of overlays when
> anti-aliasing is on).

I noticed anti-alising makes updates slower when the document is large. I have a
ipe document that is large than 2MB (all lines) and it is a pain to work with.
However, when I turned off anti-aliasing in the code things got better. Turning
off double buffering did not make any changes.

Would it be possible to have the anti-alias as an option in preferences? I noted
it seem to be prepared for that since AntiAlias is a flag in ipecanvas.cpp.


PS. The reason for working with such a large document is that I exported an
image from matlab to eps and then converted it to Ipe.

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