#include "qgslogger.h"

#include "qgsserverlogger.h"

// Test if the environ variable DISPLAY is defined

// if it's not, the server is running in offscreen mode

// Qt supports using various QPA (Qt Platform Abstraction) back ends

// for rendering. You can specify the back end to use with the environment

// variable QT_QPA_PLATFORM when invoking a Qt-based application.

// Available platform plugins are: directfbegl, directfb, eglfs, linuxfb,

// minimal, minimalegl, offscreen, wayland-egl, wayland, xcb.

// https://www.ics.com/blog/qt-tips-and-tricks-part-1

// http://doc.qt.io/qt-5/qpa.html

const char *display = getenv( "DISPLAY" );

bool withDisplay = true;

if ( !display )

{

withDisplay = false;

qputenv( "QT_QPA_PLATFORM", "offscreen" );

QgsMessageLog::logMessage( "DISPLAY not set, running in offscreen mode, all printing capabilities will not be available.", "Server", QgsMessageLog::INFO );

}

// since version 3.0 QgsServer now needs a qApp so initialize QgsApplication

QgsApplication app( argc, argv, withDisplay, QString(), QStringLiteral( "server" ) );