小编NRJ*_*NRJ的帖子

我正在使用运行在RHEL 6.0操作系统上的内置图形加速器GMA-HD的i5内核.我需要测试图形驱动程序的图形加速功能(我发现在我的电脑中是i915).我使用下面的代码(我从互联网上得到了一些修改)来写入帧缓冲区.

#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>

int main()
{
        int fbfd = 0;
        struct fb_var_screeninfo vinfo;
        struct fb_fix_screeninfo finfo;
        long int screensize = 0;
         char *fbp = 0;
        int x = 0, y = 0;
        long int location = 0;
        int count ;

        /* Open the file for reading and writing */
        fbfd = open("/dev/fb0", O_RDWR);
        if (!fbfd) {
                printf("Error: cannot open framebuffer device.\n");
                exit(1);
        }
        printf("The framebuffer device was opened successfully.\n");
     /* Get …