Results 1 to 20 of 80

Thread: GraphicsView performance problems

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #19
    Join Date
    Jan 2006
    Posts
    128
    Thanked 28 Times in 27 Posts
    Qt products
    Qt4
    Platforms
    Unix/X11 Windows

    Default Re: GraphicsView performance problems

    Well...[CUT BECAUSE SOMETHING WEIRD IS GOING ON...it seems to be as if drawing the lines one by one is faster...but somehow that is rather unbelievable on second thought]...


    Another method of getting rid of spurious mallocs is to reuse Pens and Brushes...

    I guess i will not repost all of the code for these little changes...



    Does anyone has access to a profiler on windows/mac? I would like to know if those changes that were good for linux (ellipses, rect -> painterpath) lines drawn one by one, is also good for these palatforms ;-)
    Last edited by camel; 17th February 2007 at 15:14. Reason: wtf? second thoughts

Similar Threads

  1. Performance problems with overlapping qgraphicsitems
    By brjames in forum Qt Programming
    Replies: 13
    Last Post: 4th May 2008, 21:42
  2. QT GraphicsView Help
    By mistertoony in forum Qt Programming
    Replies: 15
    Last Post: 15th February 2007, 04:17
  3. Replies: 1
    Last Post: 4th October 2006, 16:05
  4. QT4 Plugins - problems, problems
    By NormanDunbar in forum Qt Programming
    Replies: 6
    Last Post: 9th May 2006, 15:39
  5. Increasing performance from Qtextedit, listview, etc?
    By taylor34 in forum Qt Programming
    Replies: 1
    Last Post: 16th February 2006, 10:20

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide.