fixed a NPE that happened during offscreen rendering

1 files changed, 5 insertions, 3 deletions

diff --git a/src/main/java/org/jogamp/java3d/CanvasViewCache.java b/src/main/java/org/jogamp/java3d/CanvasViewCache.java
index 1edb33e..1532a81 100644
--- a/src/main/java/org/jogamp/java3d/CanvasViewCache.java
+++ b/src/main/java/org/jogamp/java3d/CanvasViewCache.java
@@ -589,9 +589,11 @@ class CanvasViewCache extends Object {
 	// 0.666x0.666 = 0.444 scaling. This is not a Java3D issue.
 	try {
 		final Graphics2D g2d = (Graphics2D) canvas.getGraphics();
-	    final AffineTransform t = g2d.getTransform();	
-	    hiDPIXScale = t.getScaleX();
-	    hiDPIYScale = t.getScaleY();
+		if (g2d != null) {
+			final AffineTransform t = g2d.getTransform();
+			hiDPIXScale = t.getScaleX();
+			hiDPIYScale = t.getScaleY();
+		}
 	} catch (IllegalComponentStateException e) {}	
 
 	metersPerPixelX = screenViewCache.metersPerPixelX;