I can confirm this bug in 4.6-RC1 with an Nvidia 280GTX using latest driver: 190.42
Ariel On Thu, Nov 19, 2009 at 6:09 AM, Trond Kjernaasen <[email protected]> wrote: > Josiah Bryan wrote: >> >> >> Trond Kjernaasen wrote: >>> Josiah Bryan wrote: >>>> Hello All - >>>> >>>> Problem in the new Qt 4.6 RC 1 released today. >>>> >>>> The attached small example illustrates the problem: >>>> >>>> With a pen enabled and the graphics item's opacity() <1.0, the pen >>>> appears to be rendered *after* the brush (see attached screenshot >>>> 'prob1.png'), and appears to be rendered as a solid rectangle (e.g. >>>> the rectangle drawn with the brush is rendered below a rectangle >>>> drawn with the pen.) It should be noted that at 1.0 opacity, >>>> drawRect() renders correctly. >>>> >>>> However, if the drawRect() call is ran without any pen set, then the >>>> rectangle renders fine. Additionally, with a regular viewport (no >>>> setViewport(new QGLWidget()) call), the drawRect() method does not >>>> show this problem. (See Attached screenshot 'prob2.png' - no pen >>>> enabled when drawRect() called - thats the ONLY difference between >>>> the two screenshots.) >>>> >>>> I'm running Fedora 8 on Linux2.6.23.9-85.fc8 #1 SMP. >>>> >>>> Can anyone else replicate this problem or have any ideas how to fix it? >>>> >>>> Thanks! >>>> -josiah >>> >>> We can't reproduce this here, but you could try to add: >>> >>> QGL::setPreferredPaintEngine(QPaintEngine::OpenGL); >>> >>> before calling the QApplication constructor and see if that helps. >>> If it helps, it means there's a problem with the new GL 2 paint engine >>> on your system. If you give us the details of the graphics card and GL >>> driver you're using, it might help us reproduce and fix it. >> >> Unfortunately, the 'setPreferredPaintEngine' call has no effect - still >> renders incorrectly with the call in place before QApplication is >> constructed. >> >> I'm using a NVIDIA Quadro NVS 290/PCI/SSE2 graphics card with four 22" >> screens. The NVIDIA X Server Settings program reports, under 'OpenGL/GLX >> Information', that it's version '2.1.2 NVIDIA 169.07', and it has the >> following extensions: > > [snip] > > Does this work with Qt 4.5? Have you tried with a newer driver? The > 169.07 is quite old, and there should be a 190.42 available for that card. > > Thanks, > -- > Trond K. > _______________________________________________ > Qt4-preview-feedback mailing list > [email protected] > http://lists.trolltech.com/mailman/listinfo/qt4-preview-feedback > -- --- Ariel Molina Rueda [email protected] _______________________________________________ Qt4-preview-feedback mailing list [email protected] http://lists.trolltech.com/mailman/listinfo/qt4-preview-feedback
