Linux下利用framebuffer画点的程序小例子：
/*
* =====================================================================================
*
* Filename: framebuffer.c
*
* Description: linux下利用framebuffer画点的程序小例子
*
* Version: 1.0
* Created: 2011年02月25日 10时33分29秒
* Revision: none
* Compiler: gcc
*
* Author: sunsea1026@gmail.com
* Company:
*
* =====================================================================================
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <linux/fb.h>
#include <unistd.h>
int main(int argc, char* argv[])
{
int fb;
int w, h;
int *fbmem;
struct fb_var_screeninfo fb_var;
int bits;
int i;
//打开设备文件fb0
fb = open("/dev/fb0", O_RDWR);
if(fb < 0)
{
printf("open fb0 error!\n");
exit(0);
}
//获取设备信息
ioctl(fb, FBIOGET_VSCREENINFO, &fb_var);
w = fb_var.xres;
h = fb_var.yres;
bits = fb_var.bits_per_pixel;
printf("Framebuffer:%d * %d\n", w, h);
printf("Bits:%d\n", bits);
//映射空间
fbmem = mmap(0, w*h*sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED, fb, 0);
*(fbmem + w * 300 + 400) = 0xffffff;
return 0;
}