Re: speed of qt terminal

[Tatsuro M. <tma...@ya...>]

----- Original Message -----

> From: sfeam 
> To: gnuplot-beta
> Cc: Daniel J Sebald > Date: 2015/6/27, Sat 12:15
> Subject: Re: speed of qt terminal
> 
> but it seems that Qt5 has deprecated the use of an environmental
> variable to select among them.  

In gnuplot_qt.cpp

#if QT_VERSION < 0x040700
    /* 
    * FIXME: EAM Nov 2011
    * It is better to use environmental variable
    * QT_GRAPHICSSYSTEM but this requires qt >= 4.7
    * "raster" is ~5x faster than "native" (default).
    * Unfortunately "opengl" isn't recognized on my test systems :-(
    */
    // This makes a huge difference to the speed of polygon rendering.
    // Alternatives are "native", "raster", "opengl"
    QApplication::setGraphicsSystem("raster");
#endif

QApplication::setGraphicsSystem apprears only here but this is for very old version of Qt.
Thus almost system, QApplication::setGraphicsSystem is not set.

Qt5 has deprecated the use of an environmental variable to select among them.
What is the default of GraphicsSystem in Qt5?

Tatsuro