#include <stdio.h>
#include <string.h> //memset
#include <unistd.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
unsigned char *fbp = 0;
int main()
{
int fp=0;
int i;
long screensize=0;
fp = open("/dev/fb0", O_RDWR);
ioctl(fp, FBIOGET_FSCREENINFO, &finfo);
ioctl(fp, FBIOGET_VSCREENINFO, &vinfo);
screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;
fbp=(char*)mmap(0,screensize,PROT_READ|PROT_WRITE,MAP_SHARED, fp, 0);
draw_rectangle(300,100,400,650);
draw_rectangle(320,110,360,590);
sleep(1);
draw_star(380,725,20);
sleep(1);
draw_circle(460,725,20);
sleep(1);
draw_trangle(540,730,20);
sleep(1);
draw_rhombus(630,725,20,30);
sleep(1);
for(i=1;i<=11;i++)
{
draw_star(380,715-50*i,20);
draw_circle(460,715-50*i,20);
draw_trangle(540,720-50*i,20);
draw_rhombus(630,715-50*i,20,30);
sleep(1);
}
memset(fbp,0,screensize);
draw_rectangle(300,100,400,650);
draw_rectangle(320,110,360,590);
draw_star(380,725,20);
draw_circle(460,725,20);
draw_trangle(540,730,20);
draw_rhombus(630,725,20,30);
munmap (fbp, screensize);
close (fp);
return 0;
}
fb.tar.gz （33个子文件） 
fb 
draw_point.o 924B draw_rectangle.c 234B draw_line.c 565B b1.c 1KB font_8x16.h 93KB draw_rectangle.o 964B p5 4KB dot8.c 276B l.c 724B main.c 1KB a2.c 677B p2 10KB a2 10KB p1 9KB draw_rhombus.c 248B dot8.o 1KB draw_star.c 431B draw_point.c 382B p6 11KB p3 6KB draw_rhombus.o 1000B a1.c 1KB draw_circle.o 884B a1 15KB main 15KB libxc.a 9KB draw_line.o 1KB draw_triangle.c 366B draw_circle.c 226B draw_triangle.o 1KB ll 9KB draw_clean.c 73B draw_star.o 1KB
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