Re: [pygame] Split screen question (newbie)

[Mundial 82 <mundial82@xxxxxxxxx>]

Hi all,

First, thanks a lot for all the help!
Ups, now I feel some performance anxiety :) As soon as my little  
artsy fartsy experiment is ready, I will share it for feedback. But,  
since I am a noob and this is my first "original IP" ;) it may take a  
while to figure out the implementation of the basic mechanics.
As for the subsurfaces explanation - thanks a lot! that makes a lot  
of sense :)

cheers

Naranjito


On Nov 22, 2007, at 3:28 AM, Casey Duncan wrote:

> On Nov 21, 2007, at 5:57 PM, Kris Schnee wrote:
> > [..]
> > With subsurfaces, eh? I was thinking more like:
> > <code>
> > w,h = SCREEN_SIZE ## eg. (800,600)
> > top_screen = pygame.surface.Surface((w,h/2))
> > bot_screen = pygame.surface.Surface((w,h/2))
> >
> > def Draw():
> >     DrawPlayerOneScreen(top_screen) ## Draw game stuff onto these  
> > surfaces
> >     DrawPlayerTwoScreen(bot_screen)
> >     screen.blit(top_screen,(0,0))
> >     screen.blit(top_screen,(0,h/2))
> >     pygame.display.update()
> > </code>
> >
> > What's the purpose of using subsurfaces? I don't understand those.
>
> If you use subsurfaces, you don't need these lines at all:
>
> >     screen.blit(top_screen,(0,0))
> >     screen.blit(top_screen,(0,h/2))
>
> Because when you blit to the subsurfaces, you are also blitting to  
> the screen (because subsurfaces share pixel data with their  
> parent). It means the system does less work and you use less  
> memory, but the effect is the same.
>
> -Casey