Simple Scrolling.

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Dépendances (dans l'archive) :
fond.bmp

Download :

#include <sdl/sdl.h>

#pragma comment(lib,"sdl.lib")
#pragma comment(lib,"sdlmain.lib")

#define SPEED -1
#define IMX 368
#define IMY 388

SDL_Surface* Charger(const char* fic)
{
    SDL_Surface *res;
    SDL_Surface* tmp = SDL_LoadBMP(fic);
    if (tmp==NULL)
    {
        printf("Erreur chargement %s\n",fic);
        exit(-1);
    }
    res = SDL_DisplayFormat(tmp);
    SDL_FreeSurface(tmp);
    return res;
}

int KeyHit()
{
    SDL_Event e;
    if (SDL_PollEvent(&e))
        if (e.type == SDL_KEYDOWN)
            return 1;
    return 0;
}

int negatmodulo(int x,int mod)
{
    if (x>=0)
        return x%mod;
    return (x%mod)+mod;
}

int main(int argc,char** argv)
{
    SDL_Surface* fond,*screen;
    int x = 0;
    SDL_Init(SDL_INIT_VIDEO);
    screen=SDL_SetVideoMode(IMX,IMY,32,SDL_SWSURFACE|SDL_DOUBLEBUF);  
    fond=Charger("fond.bmp");
    while(!KeyHit())
    {
        SDL_Rect R;
        R.x = negatmodulo(x,IMX);
        R.y = 0;
        SDL_BlitSurface(fond,NULL,screen,&R);
        R.x = negatmodulo(x,IMX) - IMX;
        SDL_BlitSurface(fond,NULL,screen,&R);
        x+=SPEED;
        SDL_Flip(screen);
        SDL_Delay(3);
    }
    SDL_FreeSurface(fond);
    SDL_Quit();
    return 0;
}

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