SDL Surfaces

[Adamoll]

Hey!
I am new to SDL library and I have problem. I am trying to fill surface called ground and then blit it to main screen surface. When I am debugging my code, I my window crashes and this appear

First-chance exception at 0x00051537 in testpowierzchnie.exe: 0xC0000005: Access violation reading location 0x00000004.
Unhandled exception at 0x00051537 in testpowierzchnie.exe: 0xC0000005: Access violation reading location 0x00000004.

Here is something wrong with filling ground surface, if I remove it, everything works.

#include <iostream>
#include <SDL.h>

using namespace std;

SDL_Surface * ground=NULL;
SDL_Surface * screen=NULL;
SDL_Event event;

int main(int argc, char * args[])
{
	SDL_Init(SDL_INIT_EVERYTHING);
	screen=SDL_SetVideoMode(1080,768,32,SDL_SWSURFACE);
	SDL_FillRect(ground,NULL,SDL_MapRGB(ground->format,22,222,192));
	SDL_BlitSurface(ground,NULL,screen,NULL);

	while(1)
	{
		if(SDL_PollEvent(&event))
		{
			if(event.type==SDL_QUIT)
				break;
		}
		SDL_Flip(screen);
	}


	SDL_FreeSurface(screen);
	SDL_FreeSurface(ground);
	SDL_Quit();
	return 0;
}

[LB]

Adamoll wrote:

blit

Which version of SDL are you using?

Also, I'm not too familiar with SDL, but some of that code looks suspicious, to say the least - ground and screen are both null yet you pass them as parameters as if they are initialized.

[N36fSL3A]

Did you try turning your computer off and on?

_^lol

[Adamoll]

I am using version 1.2.15 and something is wrong with code not with my computer.

[maeriden]

ground is still NULL on line 14.

[Adamoll]

Thanks maeriden, it was necessary to add at the beginning

ground=SDL_CreateRGBSurface(SDL_SWSURFACE,1080,768,32,0,0,0,0);

Problem solved :)