bounce.c

libfxb是linux下只写操作framebuffer的一个轻量级的库。

/* bounce.c - Bouncing ball test for libfbx
 *
 * By Michael Bourgeous <[e-mail]>
 *
 * $Id: bounce.c,v 1.5 2001/02/25 20:40:07 lethal Exp $
 */

#include <libfbx/libfbx.h>
#include <stdlib.h>
#include <unistd.h>
#include <config.h>

int main()
{
	int x, y;
	int dx, dy;
	int frame = 0;
	fb_surface *ball;

	fb_init();
	fb_handle_signals();

	ball = fb_load_ppm(IMAGEDIR "/smiley.ppm");

	x = rand() % fb_screen->width;
	y = rand() % fb_screen->height;

	dx = rand() % 4 + 1;
	dy = rand() % 4 + 1;

	while(frame < 4000)
	{
		/* fb_fill_rect(x, y, ball->width, ball->height, 0, 0, 0, fb_screen); */
		x += dx;
		y += dy;

		if(x < 0 || x >= fb_screen->width - ball->width)
			dx = -dx + rand() % 1;

		if(y < 0 || y >= fb_screen->height - ball->height)
			dy = -dy + rand() % 1;
		
		fb_draw_image(ball, fb_screen, x, y);
		frame++;
	}

	frame = 0;
	while(frame < 4000)
	{
		x += dx;
		y += dy;

		if(x < 0 || x >= fb_screen->width - ball->width)
			dx = -dx + rand() % 1;

		if(y < 0 || y >= fb_screen->height - ball->height)
			dy = -dy + rand() % 1;
		
		fb_fill_rect(x, y, x + ball->width, y + ball->height, 255, 255, 255, fb_screen);
		frame++;
	}	

	fb_cleanup();
	return 0;
}