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#include <sdl/sdl.h>
#include <sdl/sdl_image.h>
#include <string>
//SDL_Surface *background=NULL;
SDL_Surface *screen=NULL;
SDL_Surface *object=NULL;
SDL_Rect wall;
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;
SDL_Event event;
SDL_Surface *load_image( std::string filename )
{
SDL_Surface* loadedImage = NULL;
SDL_Surface* optimizedImage = NULL;
loadedImage = IMG_Load( filename.c_str() );
optimizedImage = SDL_DisplayFormat( loadedImage );
SDL_FreeSurface( loadedImage );
return optimizedImage;
}
void apply_surface(int x,int y, SDL_Surface *source,SDL_Surface *Destination,SDL_Rect *clip=NULL)
{
SDL_Rect offset;
offset.x=x;
offset.y=y;
SDL_BlitSurface (source,clip,Destination,&offset);
}
int main(int argc,char *args[])
{
int velx = 0;
int vely = 0;
SDL_Init(SDL_INIT_EVERYTHING);
bool quit = false;
int x = 0;
int y = 0;
screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE);
wall.h=200;
wall.w=200;
wall.x=300;
wall.y=300;
SDL_FillRect (screen,NULL, SDL_MapRGB( screen->format, 255, 255, 255));
SDL_FillRect( screen, &wall, SDL_MapRGB( screen->format, 77, 77, 77 ) );
Uint32 colorkey = SDL_MapRGB(object->format, 255,255,255);
SDL_SetColorKey(object,SDL_SRCCOLORKEY,colorkey);////here is the line/////////////
SDL_WM_SetCaption( "Can I Move the Dot though?", NULL );
object = load_image("object.png");
while (quit!=true)
{
if (SDL_PollEvent (&event))
{
if (event.type ==SDL_KEYDOWN)
{
switch (event.key.keysym.sym)
{
case SDLK_UP: y -=10/2; break;
case SDLK_DOWN: y +=10 / 2; break;
case SDLK_LEFT: x -= 10/ 2; break;
case SDLK_RIGHT: x += 10 / 2; break;
}
}
else if (event.type ==SDL_KEYUP)
{
switch (event.key.keysym.sym)
{
case SDLK_UP: y += 10 / 2; break;
case SDLK_DOWN: y -=10 / 2; break;
case SDLK_LEFT: x += 10/ 2; break;
case SDLK_RIGHT: x -= 10 / 2; break;
case SDLK_ESCAPE: quit=true;break;
}
}
else if (event.type == SDL_QUIT)
{
quit = true;
}
}
if (velx<0)
{
velx+=5;
}
else if (velx>SCREEN_WIDTH-200)
{
velx-=5;
}
else if (velx==wall.x+wall.w)
{
velx-=5;
}
SDL_Delay (1);
apply_surface (velx +=x,vely +=y,object,screen);
SDL_Flip (screen);
}
SDL_FreeSurface (object);
return 0;
}
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