From 2ed2f09de0043bbf98a5b727854bd93a02b204ab Mon Sep 17 00:00:00 2001
From: jsimomaa <jani.simomaa@gmail.com>
Date: Wed, 20 Nov 2019 10:54:42 +0200
Subject: [PATCH] Add check for headless installations in DPIUtil

gitlab #418

Change-Id: I5d7b637ad7833f7cfa60969c81be818d3d8fefc1
---
 .../src/org/simantics/scenegraph/utils/DPIUtil.java        | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/DPIUtil.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/DPIUtil.java
index 0a138b305..8c0c65dad 100644
--- a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/DPIUtil.java
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/DPIUtil.java
@@ -11,6 +11,7 @@
  *******************************************************************************/
 package org.simantics.scenegraph.utils;
 
+import java.awt.GraphicsEnvironment;
 import java.awt.Point;
 import java.awt.Rectangle;
 import java.awt.Toolkit;
@@ -35,7 +36,11 @@ public class DPIUtil {
 		if (initialized)
 			return;
 
-		double dpi = Toolkit.getDefaultToolkit().getScreenResolution();
+		double dpi;
+		if (!GraphicsEnvironment.isHeadless())
+			dpi = Toolkit.getDefaultToolkit().getScreenResolution();
+		else
+			dpi = 96;
 		double baseDpi = 96;
 		int zoom = (int) Math.round(100.0 * dpi / baseDpi);
 		hasZoom = zoom != 100;
-- 
2.47.1