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-rw-r--r--src/jogl/classes/com/jogamp/opengl/swt/GLCanvas.java4
-rw-r--r--src/jogl/classes/javax/media/opengl/awt/GLCanvas.java4
-rw-r--r--src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java4
3 files changed, 9 insertions, 3 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/swt/GLCanvas.java b/src/jogl/classes/com/jogamp/opengl/swt/GLCanvas.java
index 73d3cd01e..33322628d 100644
--- a/src/jogl/classes/com/jogamp/opengl/swt/GLCanvas.java
+++ b/src/jogl/classes/com/jogamp/opengl/swt/GLCanvas.java
@@ -159,7 +159,9 @@ public class GLCanvas extends Canvas implements GLAutoDrawable {
final RecursiveLock _lock = lock;
_lock.lock();
try {
- drawable.swapBuffers();
+ if(null != drawable) {
+ drawable.swapBuffers();
+ }
} finally {
_lock.unlock();
}
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
index ed069bf22..31c91e046 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
@@ -1004,7 +1004,9 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable, WindowClosing
final RecursiveLock _lock = lock;
_lock.lock();
try {
- drawable.swapBuffers();
+ if(null != drawable) {
+ drawable.swapBuffers();
+ }
} finally {
_lock.unlock();
}
diff --git a/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java b/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
index 42e14366c..057f28487 100644
--- a/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
+++ b/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
@@ -249,7 +249,9 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
final RecursiveLock _lock = getLock();
_lock.lock();
try {
- drawable.swapBuffers();
+ if(null != drawable) {
+ drawable.swapBuffers();
+ }
} finally {
_lock.unlock();
}