SDL_gfx sample program

sdl_gfx_sample.c

//
// SDL_gfx sample program...
//   http://www.ferzkopp.net/Software/SDL_gfx-2.0/
//
// for mac:
//   $ brew install sdl
//   $ brew install sdl_gfx
//   $ gcc -g -framework Cocoa -lSDL_gfx -lSDLmain -lSDL -o sdl_gfx_sample sdl_gfx_sample.c
//
#include <SDL/SDL.h>
#include <SDL/SDL_gfxPrimitives.h>

#define SCREEN_W	320
#define SCREEN_H	240

int main(int argc, char *argv[])
{
	SDL_Event evt; 
	int i;

	if (SDL_Init(SDL_INIT_VIDEO) != 0) {
		return -1;
	}

	SDL_Surface *screen = SDL_SetVideoMode(SCREEN_W, SCREEN_H, 24, SDL_SWSURFACE | SDL_DOUBLEBUF);
	if (screen == NULL) {
		return -1;
	}

	while(1) {
		while(SDL_PollEvent(&evt)) {
			if(evt.type == SDL_QUIT) {
				goto finish;
			}
			if (evt.type == SDL_KEYUP && evt.key.keysym.sym == SDLK_ESCAPE) {
				goto finish;
			}
		}

		SDL_LockSurface(screen);

		SDL_FillRect(screen, NULL, 0x000088); 

		for (i = 0; i < 100; ++i) {
			int x0 = rand() % SCREEN_W;
			int y0 = rand() % SCREEN_H;
			int x1 = rand() % SCREEN_W;
			int y1 = rand() % SCREEN_H;
			
			// http://www.ferzkopp.net/Software/SDL_gfx-2.0/
			lineColor(screen, x0, y0, x1, y1, 0xFFFFFFFF);
		}

		SDL_FreeSurface(screen);
		SDL_Flip(screen);
	}
	
finish:
	SDL_FreeSurface(screen);
	SDL_Quit();

	return 0;
}