spieleprogrammierer.de - Forum und Wiki zur Spieleprogrammierung und Spieleentwicklung

Quellcode

#include "sdl.h"
#include "sdl_image.h"
#include <string>

// The surfaces 
SDL_Surface *dots = NULL;
SDL_Surface *screen = NULL;

// The window attributs

const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;

// the event structur
SDL_Event event;

// The portions of the Sprite map to be blitted
SDL_Rect clip [4];

void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect *clip);
SDL_Surface *load_image( std::string filename );
bool init ();
bool load_files ();
void clean_up ();

int main (int argc, char *args[])
{
    clip[0].x = 0;
    clip[0].y = 0;
    clip[0].w = 100;
    clip[0].h = 100;

    clip[1].x = 100;
    clip[1].y = 0;
    clip[1].w = 100;
    clip[1].h = 100;

    clip[2].x = 0;
    clip[2].y = 100;
    clip[2].w = 100;
    clip[2].h = 100;

    clip[3].x = 100;
    clip[3].y = 100;
    clip[3].w = 100;
    clip[3].h = 100;
    
    // Initialize
    if (init () == false)
    {
        return 1;
    };

    // Load files 
    if (load_files == false)
    {
        return 1;
    };

    // Fill the screen white
    SDL_FillRect (screen, &screen->clip_rect, SDL_MapRGB( screen->format, 0xFF, 0xFF, 0xFF));

    // Apply the images to the screen
    apply_surface(0, 0, dots, screen, &clip[0]);
    apply_surface(540, 0, dots, screen, &clip[1]);
    apply_surface(0, 380, dots, screen, &clip[2]);
    apply_surface(540, 380, dots, screen, &clip[3]);

    // Update SDL
    if (SDL_Flip (screen) == -1)
    {
        return 1;
    };

    SDL_Delay (5000);

    clean_up ();

    return 0;
};

void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect *clip) 
{ 
    //Make a temporary rectangle to hold the offsets 
    SDL_Rect offset; 
    
    //Give the offsets to the rectangle 
    offset.x = x; 
    offset.y = y;

    //Blit the surface 
    SDL_BlitSurface( source, clip, destination, &offset ); 
};



SDL_Surface *load_image( std::string filename ) 
{   
    //The image that's loaded 
    SDL_Surface* loadedImage = NULL; 
    
    //The optimized image that will be used 
    SDL_Surface* optimizedImage = NULL; 
    
    //Load the image using SDL_image 
    loadedImage = IMG_Load( filename.c_str() ); 
    
    //If the image loaded 
    
    if( loadedImage != NULL ) 
    { 
        //Create an optimized image 
        optimizedImage = SDL_DisplayFormat( loadedImage ); 
        //Free the old image 
        SDL_FreeSurface( loadedImage ); 
    } 
    
    //Return the optimized image 
    return optimizedImage; 
};

bool init ()
{
    // Initialize all SDL subsystems
    if (SDL_Init (SDL_INIT_EVERYTHING) == -1)
    {
        return false;
    };

    // Set up Screen 
    screen = SDL_SetVideoMode (SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE | SDL_DOUBLEBUF);

    // If there was an error in setting up the screen
    if (screen == NULL)
    {
        return false;
    };

    // Set the windows caption
    SDL_WM_SetCaption("Sprite_Sheets test", NULL);

    // If everything fine
    return true;
};

bool load_files ()
{
    // Load the image
    dots = load_image("Data/a.bmp");
    
    // If there was an error on loading the image 
    if (dots == NULL)
    {
        return 1;
    };

    // If everything loaded fine
    return true;
};

void clean_up ()
{
    // Free the image
    SDL_FreeSurface (dots);

    // SDL Quit
    SDL_Quit ();

};

C-/C++-Quelltext

   // Load files

   if (load_files == false)
   {
      return 1;
   }; 

C-/C++-Quelltext

   // Load files

   if (load_files () == false)
   {
      return 1;
   };