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

#include

#include

#include

#include

#include

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;

}