[SDL] Again about frame rate

[Alejandro Arrieta Rios]

Mensaje citado por: Paulo V W Radtke <pvwradtke at sympatico.ca>: 
 
> > i doubt that. tft displays are usually connected to a hardware scaler 
> to 
> > avoid this problem, othervise you would not see anything on the 
> screen 
> > when the bios initializes the pc hardware. the pc BIOS only suports 
> VGA 
> > resolution means 640x480. also the os does not know anything about 
> the 
> > fixed resolution of the tft. either you get a proper (but maybe 
> ugly) 
> > scaled display or you will see the infamous letter box thing on your 
> > screen, when you use a resolution other then the displays native 
> one. 
>  
>  That is true for TFT displays for desktop computers (which can cost  
> half the price of a whole notebook). But to save costs on notebooks, the 
>  
> motherboard is custom made and they can make whatever they want with the 
>  
> boot screen to fit the TFT resolution, which can then be much simpler to 
>  
> avoid hardware re scalers which increase prices. On a MAC notebook I am 
>  
> 100% sure that this happens (I have one and faced this myself), the  
> system has only one resolution and all others are rescaled by the  
> system. And it does slow down a lot the performance of full screen SDL 
>  
> surfaces on my iBook 900. Changing from 2D SDL to OpenGL was a change  
> from 33fps to over 500fps. 
>  
>  Not to mention that recently someone was discussing here a problem with 
>  
> a game that was running small in the center of a notebook's display,  
> when someone mentioned that the problem was the video driver  
> configuration that was not configured correctly to stretch resolutions 
>  
> smaller than the notebook fixed TFT display. 
>  
>  Anyway, NighTiger should FIRST try his code on another system to see if 
>  
> the problem persists, and I recommend a desktop computer. 
>  
>  Best regards, 
>  
>  Paulo V W Radtke - Chien Loco Jogos de Garagem® 
>  
> http://blog.chienloco.com 
> http://www.chienloco.com 
>  
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> http://www.libsdl.org/mailman/listinfo/sdl 
>  
 
Hello 
 
I have a Dell Inspiron 5150 with a Sharp screen (1600x1200) and an Ati M9 64MB 
video card. In the Bios of the notebook is a Resize Option. If this option is 
enabled all lower resolution will be scaled in hardware to cover the whole 
screen, no perfomance hit detected. If the option is disabled the lower 
resolutions are centered in the screen with a black frame around them, the Bios 
screen too. I dont know if the resize is done by the video card or something 
else attached to the screen, but its fast. 
 
 
Maybe PPC notebooks are different. Which video card has your notebook? 
 
Bye 
 
---    
Alejandro Arrieta Rios   
Ms Cs Student UTFSM  
Bs Computer Science UTFSM   
Chile