sfRenderWindow as function argument

[c-jay]

Hi,

this works fine:

#include <SFML/Graphics.h>
#define SCREENWIDTH 1000
#define SCREENHEIGHT 1000
#define BITSPERPIXEL 32

sfRenderWindow* sf_init()
{
        sfVideoMode mode =
                        { SCREENWIDTH, SCREENHEIGHT, BITSPERPIXEL };

        /* Create the main window */
        return sfRenderWindow_create(mode, "SFML window", sfResize | sfClose, NULL);

}

void main(){
       sfRenderWindow* window = sf_init();
}
 

But why doesn't work this:

#include <SFML/Graphics.h>
#define SCREENWIDTH 1000
#define SCREENHEIGHT 1000
#define BITSPERPIXEL 32

void sf_init(sfRenderWindow *window)
{
        sfVideoMode mode =
                        { SCREENWIDTH, SCREENHEIGHT, BITSPERPIXEL };

        /* Create the main window */
        window = sfRenderWindow_create(mode, "SFML window", sfResize | sfClose, NULL);

}
void main(){
        sfRenderWindow* window;
        sf_init(window);
}
 

Any ideas into where the problem lies? Thanks.

[Laurent]

You modify a local variable. To change the original pointer and not a copy of it, you must pass a pointer to it.

void sf_init(sfRenderWindow **window)
{
    sfVideoMode mode =
            { SCREENWIDTH, SCREENHEIGHT, BITSPERPIXEL };

    /* Create the main window */
    *window = sfRenderWindow_create(mode, "SFML window", sfResize | sfClose, NULL);

}
void main(){
    sfRenderWindow* window;
    sf_init(&window);
}

This is basic C stuff, nothing to do with SFML...

[c-jay]

Okay, thank you very much for open my mind!