Monitor.Linux.cpp

#include "Monitor.h"
 
#include "X11Module.h"
#include "XineramaModule.h"
 
#include <string>
#include <vector>
 
namespace {
  std::vector<Cogs::Monitor>  monitors;
}
 
void Cogs::Monitor::enumerate() {
  monitors.clear();
 
  X11Module&          x11 = X11Module::instance();
  ::Display*          display = x11.XOpenDisplay(nullptr);
  int                 screenCount = 0;
  XineramaScreenInfo* screens = XineramaModule::instance().XineramaQueryScreens(display, &screenCount);
 
  monitors.resize(screenCount);
  for (int idx = 0; idx < screenCount; ++idx) {
    const XineramaScreenInfo* screen = screens + idx;
    Monitor&                  monitor = monitors[idx];
 
    monitor.identifier = reinterpret_cast<void*>(screen->screen_number);
    monitor.name = std::to_string(screen->screen_number);
    monitor.position = glm::ivec2(screen->x_org, screen->y_org);
    monitor.size = glm::ivec2(screen->width, screen->height);
 
    // This is nothing more than a guess...
    if ((screen->x_org == 0) && (screen->y_org == 0)) {
      monitor.primary = true;
    }
  }
  x11.XFree(screens);
  x11.XCloseDisplay(display);
}