Re: speed of qt terminal

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

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

> From: Tatsuro MATSUOKA 
> To: Merritt Ethan  gnuplot-beta
> Cc: Daniel J Sebald 
> Date: 2015/6/27, Sat 18:22
> Subject: Re: speed of qt terminal
> 
> ----- 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

Sorry 
Concept of GraphicsSystem is deprecated in Qt5.

This is the first time to read Qt documentation.

I propose that comment for QApplication::setGraphicsSystem is deprecated for Qt5 is added 
to somewhere appropriate.


Tatsuro