get Moitor information for openframeworks

ofxMonitorUtils.h

#pragma once
#include "ofLog.h"
#include "ofVectorMath.h"
#include "GLFW/glfw3.h"

namespace ofxMonitorUtils {

struct MonitorInfo {
  int         index;
  std::string name;
  bool        isPrimary;
  int         w, h, x, y, physW, physH, refreshRate;

  MonitorInfo(){};
  MonitorInfo(int i, std::string name, int w, int h, int x, int y,
              bool isPrimary, int physW, int physH, int rate)
      : index(i), name(name), w(w), h(h), x(x), y(y), isPrimary(isPrimary), physW(physW), physH(physH), refreshRate(rate){};

  glm::vec2 getPosition() { return glm::vec2(x, y); }
  glm::vec2 getResolution() { return glm::vec2(w, h); }
};

inline std::vector<MonitorInfo> getMonitorInformations(bool log = false) {
  std::vector<MonitorInfo> monitorInfo;
  glfwInit();
  auto       primary = glfwGetPrimaryMonitor();
  int        count;
  const auto monitors = glfwGetMonitors(&count);
  for (int i = 0; i < count; i++) {
    auto monitor   = monitors[i];
    bool isPrimary = (primary == monitor);
    int  w, h, x, y, physW, physH, refreshRate;
    glfwGetMonitorPhysicalSize(monitor, &physW, &physH);
    glfwGetMonitorPos(monitor, &x, &y);
    auto mode        = glfwGetVideoMode(monitor);
    w                = mode->width;
    h                = mode->height;
    refreshRate      = mode->refreshRate;
    std::string name = glfwGetMonitorName(monitor);
    monitorInfo.push_back(MonitorInfo(i, name, w, h, x, y, isPrimary, physW, physH, refreshRate));

    if (log) {
      ofLogNotice(__FUNCTION__) << "\n  "
                                << i << ": " << name << (isPrimary ? "(Primary)" : "") << "\n"
                                << "  Resolution : " << w << "x" << h << "pix  from  Pos: " << x << ", " << y << "pix\n"
                                << "  PhysicalSize : " << physW << "x" << physH << "mm  /  RefreshRate:" << refreshRate << "Hz";
    }
  }
  return monitorInfo;
}
inline MonitorInfo getPrimaryMonitorInfo(bool log = false) {
  int  monitorIndex = 0;
  auto monitors     = getMonitorInformations(log);
  auto it           = std::find_if(monitors.begin(), monitors.end(), [](const auto& mi) { return mi.isPrimary == true; });
  if (it != monitors.end())
    monitorIndex = it->index;
  else
    ofLogWarning(__FUNCTION__, "not found Primary Monitor, set monitorIndex to 0 ...");
  return monitors[monitorIndex];
}
inline MonitorInfo getSubMonitorInfo(bool log = false) {
  int  monitorIndex = 0;
  auto monitors     = getMonitorInformations(log);
  auto it           = std::find_if(monitors.begin(), monitors.end(), [](const auto& mi) { return mi.isPrimary == false; });
  if (it != monitors.end())
    monitorIndex = it->index;
  else
    ofLogWarning(__FUNCTION__, "not found Sub Monitor, set monitorIndex to 0 ...");
  return monitors[monitorIndex];
}

}  // namespace ofxMonitorUtils