[SDL] How to clear the SDL screen

[David Olofson]

On Wednesday 31 March 2010, at 07.01.42, anil v <anil.vemulapally at gmail.com> 
wrote:
[...]
> SDL_FillRect(sdl_screen,NULL, 0x000000);
> SDL_Flip(sdl_screen);

That seems ok, although theoretically, you can't be totally sure that 0x000000 
means "black" on all displays. You should use SDL_MapRGB() for that, 
especially if you want any other color than black.


> even though it is not clearing the screen if i called above two statements
> twice it is clearing

That's normal for a double buffered display.


> but it is getting crashing while Clearing the screen
> only. If i comment above code is working fine but Screen is not clearing
> when i stop the YUV data writing.

That sounds like the YUV code damages some structures or something...

Do you have access to Valgrind (Linux, Mac OS X, Un*x variants), BoundsChecker 
(Windows) or something similar? Such tools can sometimes help find this kind 
of bugs in a matter of minutes.


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