Getting The Screen Resolution Under Linux

[reepblue]

With my application, if a settings file does not exist, the main function creates one, and fills it with default values. One of these is to grab the main screen res of the user's monitor.

 

In Windows, I can do:

 

unsigned int width = GetSystemMetrics(SM_CXSCREEN);

unsigned int height = GetSystemMetrics(SM_CYSCREEN);

 

However, since my HDD with Ubuntu on it died, I can't test the linux variant I've found on the internet.

 

#include <X11/Xlib.h>

 

Display* disp = XOpenDisplay(NULL);

Screen* scrn = DefaultScreenOfDisplay(disp);

unsigned int width = scrn->width;

unsigned int height = scrn->height;

 

Is this correct/will work, or is there a different/better way? I tried using the Count/GetGraphicsModes function, and although it did work on my Linux machine, it did not work on my Windows Machine, and I've read that it's not perfect.

Thanks.

[reepblue]

Thanks to macklebee, the correct answer is to use the count/getnodes function like:

 

unsigned int xo = System::GetGraphicsMode(System::CountGraphicsModes() - 1).x;

unsigned int yo = System::GetGraphicsMode(System::CountGraphicsModes() - 1).y;

 

Then, use those int values for x and y. In this case, I need it to be a char to save to an XML file.

 

namespace patch

{

template < typename T > std::string to_string(const T& n)

{

std::ostringstream stm;

stm << n;

return stm.str();

}

}

 

std::string sx = patch::to_string(xo);

char const *pchar_resX = sx.c_str();

 

std::string sy = patch::to_string(yo);

char const *pchar_resY = sy.c_str();