[312723] Fonts broken on Export to Image and Printing

- Revert parts of previous changes (use hardcoded 96dpi), which caused issues on MacOS
  see discussion in the bug.
- Make the DPI used overridable through a system property in case the
  computation does not work as expected in some configurations (OS,
  SWT version, actual screen DPI and zoom factor, etc.).
- Increase version number from 1.8.0 to 1.8.1

Signed-off-by: Ansgar Radermacher <ansgar.radermacher@cea.fr>
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
Change-Id: If93348667b76f32e918d7365b554e54bf85c0b9f
diff --git a/org.eclipse.gmf.runtime.draw2d.ui.render.awt/META-INF/MANIFEST.MF b/org.eclipse.gmf.runtime.draw2d.ui.render.awt/META-INF/MANIFEST.MF
index abe55e4..88c07bd 100644
--- a/org.eclipse.gmf.runtime.draw2d.ui.render.awt/META-INF/MANIFEST.MF
+++ b/org.eclipse.gmf.runtime.draw2d.ui.render.awt/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %Plugin.name
 Bundle-SymbolicName: org.eclipse.gmf.runtime.draw2d.ui.render.awt;singleton:=true
-Bundle-Version: 1.8.0.qualifier
+Bundle-Version: 1.8.1.qualifier
 Bundle-Activator: org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.Draw2dRenderPlugin
 Bundle-Vendor: %Plugin.providerName
 Bundle-Localization: plugin
diff --git a/org.eclipse.gmf.runtime.draw2d.ui.render.awt/pom.xml b/org.eclipse.gmf.runtime.draw2d.ui.render.awt/pom.xml
index 1c2ccc9..21cd7e9 100644
--- a/org.eclipse.gmf.runtime.draw2d.ui.render.awt/pom.xml
+++ b/org.eclipse.gmf.runtime.draw2d.ui.render.awt/pom.xml
@@ -10,6 +10,6 @@
   </parent>
   <groupId>org.eclipse.gmf.runtime.draw2d.ui.render.awt</groupId>
   <artifactId>org.eclipse.gmf.runtime.draw2d.ui.render.awt</artifactId>
-  <version>1.8.0-SNAPSHOT</version>
+  <version>1.8.1-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
 </project>
diff --git a/org.eclipse.gmf.runtime.draw2d.ui.render.awt/src/org/eclipse/gmf/runtime/draw2d/ui/render/awt/internal/graphics/GraphicsToGraphics2DAdaptor.java b/org.eclipse.gmf.runtime.draw2d.ui.render.awt/src/org/eclipse/gmf/runtime/draw2d/ui/render/awt/internal/graphics/GraphicsToGraphics2DAdaptor.java
index 594e324..bbc2ed6 100644
--- a/org.eclipse.gmf.runtime.draw2d.ui.render.awt/src/org/eclipse/gmf/runtime/draw2d/ui/render/awt/internal/graphics/GraphicsToGraphics2DAdaptor.java
+++ b/org.eclipse.gmf.runtime.draw2d.ui.render.awt/src/org/eclipse/gmf/runtime/draw2d/ui/render/awt/internal/graphics/GraphicsToGraphics2DAdaptor.java
@@ -1,5 +1,5 @@
 /******************************************************************************
- * Copyright (c) 2004, 2015 IBM Corporation and others.
+ * Copyright (c) 2004, 2015, 2021 IBM Corporation and others.
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
  * which is available at https://www.eclipse.org/legal/epl-2.0/
@@ -7,7 +7,8 @@
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
- *    IBM Corporation - initial API and implementation 
+ *    IBM Corporation - initial API and implementation
+ *    Ansgar Radermacher - bug 312723, revert parts of initial changes for this issue
  ****************************************************************************/
 
 
@@ -1074,9 +1075,8 @@
 
 			int height = fontInfo[0].getHeight();
 			
-			float fsize = (float) height
-					* 96.0f	/ 72.0f;		// default display DPI / default DPI of AWT
-			
+			int dpi = Integer.getInteger("org.eclipse.gmf.runtime.draw2d.ui.render.dpi", DisplayUtils.getDisplay().getDPI().x);
+			float fsize = (float) height * (float) dpi / 72.0f;        // display DPI / AWT DPI
 			height = (int) fsize;
 			
 			int style = fontInfo[0].getStyle();