From 7bfd60ab78672c973c99d1a5e74ff700a04fb022 Mon Sep 17 00:00:00 2001 From: rldhont Date: Fri, 20 Oct 2017 09:30:43 +0200 Subject: [PATCH] [Server][Bugfix] Test if the environ variable DISPLAY is defined --- src/server/qgis_map_serv.cpp | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/src/server/qgis_map_serv.cpp b/src/server/qgis_map_serv.cpp index 539583c1a39..4ece9c63192 100644 --- a/src/server/qgis_map_serv.cpp +++ b/src/server/qgis_map_serv.cpp @@ -19,6 +19,8 @@ //for CMAKE_INSTALL_PREFIX #include "qgsconfig.h" #include "qgsserver.h" +#include "qgslogger.h" +#include "qgsserverlogger.h" #include "qgsfcgiserverresponse.h" #include "qgsfcgiserverrequest.h" @@ -39,7 +41,25 @@ int fcgi_accept() int main( int argc, char *argv[] ) { - QgsApplication app( argc, argv, getenv( "DISPLAY" ), QString(), QStringLiteral( "server" ) ); + // 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" ) ); QgsServer server; #ifdef HAVE_SERVER_PYTHON_PLUGINS server.initPython();