Graph: Fix NPE in case of double destroy call ..

2 files changed, 32 insertions, 12 deletions

diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
index a760dcd33..6f9ef107b 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PVBAAES2.java
@@ -88,12 +88,22 @@ public class VBORegion2PVBAAES2  extends GLRegion {
 
     @Override
     protected final void clearImpl(final GL2ES2 gl, final RegionRenderer renderer) {
-        indicesTxtBuffer.seal(gl, false);
-        indicesTxtBuffer.rewind();
-        verticeTxtAttr.seal(gl, false);
-        verticeTxtAttr.rewind();
-        texCoordTxtAttr.seal(gl, false);
-        texCoordTxtAttr.rewind();
+        if(DEBUG_INSTANCE) {
+            System.err.println("VBORegion2PES2 Clear: " + this);
+            // Thread.dumpStack();
+        }
+        if( null != indicesTxtBuffer ) {
+            indicesTxtBuffer.seal(gl, false);
+            indicesTxtBuffer.rewind();
+        }
+        if( null != verticeTxtAttr ) {
+            verticeTxtAttr.seal(gl, false);
+            verticeTxtAttr.rewind();
+        }
+        if( null != texCoordTxtAttr ) {
+            texCoordTxtAttr.seal(gl, false);
+            texCoordTxtAttr.rewind();
+        }
     }
 
     @Override
@@ -387,6 +397,7 @@ public class VBORegion2PVBAAES2  extends GLRegion {
     protected void destroyImpl(final GL2ES2 gl, final RegionRenderer renderer) {
         if(DEBUG_INSTANCE) {
             System.err.println("VBORegion2PES2 Destroy: " + this);
+            // Thread.dumpStack();
         }
         final ShaderState st = renderer.getShaderState();
         if(null != fbo) {
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java
index e45e623ba..baeb8dc46 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegionSPES2.java
@@ -57,12 +57,21 @@ public class VBORegionSPES2 extends GLRegion {
 
     @Override
     protected final void clearImpl(final GL2ES2 gl, final RegionRenderer renderer) {
-        indicesBuffer.seal(gl, false);
-        indicesBuffer.rewind();
-        verticeAttr.seal(gl, false);
-        verticeAttr.rewind();
-        texCoordAttr.seal(gl, false);
-        texCoordAttr.rewind();
+        if(DEBUG_INSTANCE) {
+            System.err.println("VBORegionSPES2 Clear: " + this);
+        }
+        if( null != indicesBuffer ) {
+            indicesBuffer.seal(gl, false);
+            indicesBuffer.rewind();
+        }
+        if( null != verticeAttr ) {
+            verticeAttr.seal(gl, false);
+            verticeAttr.rewind();
+        }
+        if( null != texCoordAttr ) {
+            texCoordAttr.seal(gl, false);
+            texCoordAttr.rewind();
+        }
     }
 
     @Override