[Ipe-discuss] Antialiasing, delete

[Otfried Cheong]

Dmitriy Morozov wrote:
> I have removed this line because the lines were flickering noticeably with
> it (not dramatically, but noticeably) when antialiasing was on. In light
> of what you say about Ipe's implicit off-screen drawing, I'm not sure why
> this happens. I use only Linux, and it has not become slow (i.e., I saw no
> change in speed). However, it would be interesting to have other users
> check its performance too.

Most mysterious.  On my computer (a standard Fedora Core 3 
installation), Ipe became unusably slow (it would take 5 seconds for the 
display to follow the cursor movement).  Perhaps I should take out Ipe's 
own rendering to bitmap and see what happens.  I'd encourage all Linux 
user's to comment out the following line in 
"src/ipecanvas/ipecanvas.cpp" and report whether Ipe slows down 
dramatically or whether it improves rendering without any problem:

   setAttribute(Qt::WA_PaintOnScreen);

>>Yes, it's a bug (and has already been filed).
> 
> Well, by me, so it wasn't already when I asked. ;-)

That's not what I meant.  You filed bug #130, but the same problem had 
already been reported as bug #122 and bug #128.

Otfried