Nevermind... Seems I f... up in my tests. Only Qt 4.7 seem to solve the Qt problem...
On Mon, Dec 20, 2010 at 11:47, Chris Browet <c...@semperpax.com> wrote: > Hi, > > Long story: > From the early days of Merkaartor, Qt had a problem when we were drawing > long roads at high zoom levels. Somehow, the drawing was not properly > clipped and an insane large bitmap was created by Qt to draw the road and > then only clipped to be drawn on screen. So we resolved to implement our own > clipping. > > Recently I noticed (at least on my test systems) that it was no longer > necessary and removing self-clipping would allow to remove the dependency on > Boost and specifically Boost::Geometry > Not knowing precisely when that was solved on the Qt side, I disabled > self-clipping for Qt >= 4.6.0. > > My Test systems (which do no not have the problem) are: > Win 7 / Qt 4.6.3 / ATI > Ubunutu 10.04 / Qt 4.6.2 / Virtualbox > Ubuntu 64 10.10 / Qt 4.7.0 / Virtualbox > > Could those affected by the problem add to > http://merkaartor.be/issues/3206: > - Their OS version > - Their Qt version > - Their graphic card brand > > The goal is to find a proper pattern (if any). If none can be identified, > I'll think about some other way... > > Thanks in advance > - Chris - > > > > On Mon, Dec 20, 2010 at 08:10, <nore...@merkaartor.be> wrote: > >> Issue #3206 has been reported by Jean-Claude Repetto. >> ------------------------------ >> Bug #3206: Performance issue <http://merkaartor.be/issues/3206> >> >> - Author: Jean-Claude Repetto >> - Status: New >> - Priority: High >> - Assigned to: >> - Category: >> - Target version: >> - Resolution: >> >> The current (17 december 2010) trunk version is very slow (about 40 times >> slower than a mid-october version). For example, dragging a node takes from >> 8 to 10 seconds, while with an older version it took a fraction of second. >> I used "git bisect" to check the exact version where the problem appeared >> : >> >> aef25d136e1b7cb2858027356b32a71ea821d97b is the first bad commit >> commit aef25d136e1b7cb2858027356b32a71ea821d97b >> Author: Chris "Koying" Browet <c...@semperpax.com> >> Date: Mon Nov 1 03:31:55 2010 +0100 >> >> Spatialite cont'd >> Do not self-clip QpainterPath anymore >> >> ------------------------------ >> >> You have received this notification because you have either subscribed to >> it, or are involved in it. >> To change your notification preferences, please click here: >> http://merkaartor.be/my/account >> > >
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