[Kde-games-devel] best class to use for drawing unmanaged graphics?

[Matthew Woehlke]

Matt Williams wrote:
> On Tuesday 15 April 2008 20:05:11 Matthew Woehlke wrote:
>> Albert Astals Cid wrote:
>>> A Dimarts 15 Abril 2008, Matthew Woehlke va escriure:
>>>> What's the best way to do a game that draws a whole bunch of pixmaps if
>>>> I prefer to do the scene management myself? I know of QGraphicsScene
>>>> (not my first choice), KGameCanvas (can't find documentation?), and good
>>>> old drawPixmap().
>>> If you want to do management yourself i think QPainter is the best way.
>> Is KGameCanvas "dead" then? Otherwise, where would I find information on
>> it?
> 
> The second google hit for "KGameCanvas": 
> http://myrizio.wordpress.com/2007/07/31/putting-kgamecanvas-to-sleep-forever/. 
> Basically, QGraphicsView is 'good' now so there's no need for KGameCanvas.

Found that already, didn't tell me anything about what KGC is... just 
that one person (well, I guess maybe more than one :-), but that's all I 
knew at the time) thinks it is unneeded now.

I'd like to have something that will perform better when only a small 
portion of the canvas needs to be redrawn, but QGV+QGS seems like a lot 
of extra work and classes floating around to do that.

How bad is the performance of filling a full-screen scene when all that 
consists of is painting several dozen pixmaps? Would I be better off 
using GL instead (I'm assuming that a full-screen repaint in GL is 
pretty painless?) and converting the pixmaps to textures? (This might be 
good as I'd get ultra-cheap resizing with GL's texture scaling, and 
could re-render the textures to the new "native" size in the background.)

-- 
Matthew
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