Linux c 编程获取屏幕分辨率
请问怎么用Linux c 编程获取屏幕分辨率,不要QT和GTK的。 谢谢了
[解决办法]
open /dev/graphics/fb0
ioctl FBIOGET_VSCREENINFO.
[解决办法]
我没学过内核级programming,但是如果是在X下的话,以下代码来自XCB官方。
#include <stdio.h> #include <xcb/xcb.h> int main () { /* Open the connection to the X server. Use the DISPLAY environment variable */ int i, screenNum; xcb_connection_t *connection = xcb_connect (NULL, &screenNum); /* Get the screen whose number is screenNum */ const xcb_setup_t *setup = xcb_get_setup (connection); xcb_screen_iterator_t iter = xcb_setup_roots_iterator (setup); // we want the screen at index screenNum of the iterator for (i = 0; i < screenNum; ++i) { xcb_screen_next (&iter); } xcb_screen_t *screen = iter.data; /* report */ printf ("\n"); printf ("Informations of screen %ld:\n", screen->root); printf (" width.........: %d\n", screen->width_in_pixels); printf (" height........: %d\n", screen->height_in_pixels); printf (" white pixel...: %ld\n", screen->white_pixel); printf (" black pixel...: %ld\n", screen->black_pixel); printf ("\n"); return 0; }
[解决办法]
fb0是终端的SVGA FrameBuffer驱动程序。所以获得的是终端的数据。
XCB是X-Window C Binding,是一个用于和X交互的C语言API。你应该安装libxcb的开发库和头文件。比如fedora要安装libxcb-devel这样的包。
这样在gcc编译的时候指定--libs xcb就可以了。具体可以看教程http://xcb.freedesktop.org/tutorial/,注意不需要按照那个安装步骤,因为一般Linux发行版都打包了libxcb的开发文件,用软件管理器安装即可。