> > 2) Using QPainter directly (OSX api) to draw is dead slow, 550% slower > > that drawing to QImage. > > I am wondering if there is any interest to this? Is it even normal? >There are cases where CoreGraphics does better than the usecase you > provided, but we are in general not happy with the performance we get > from it. This is why we are opening up the option for switching to use > different graphics backends on both OSX and X11. You can runapplications > with -graphicssystem raster (or even configure Qt with itto have enabled > for all apps). You can also try with the highlyexperimental > -graphicssystem opengl, but it probably won't look so good ;)
The Qt 4.5 doc says: by default the backends is "Software Rasterizer" for Windows. But by tracing with the debugger, in API QGraphicsSystemFactory::create, the default engine is in fact "native", not "raster". In all cases, I see no difference of speed. In earlier Qt version, native was faster under Windows. _______________________________________________ Qt4-preview-feedback mailing list [email protected] http://lists.trolltech.com/mailman/listinfo/qt4-preview-feedback
