TileRendererBase.GLEL.display(): Skip tile-rendering if TR is not yet…

… setup. Sync issue w/ NEWT/AWT based GLAD

NEWT based GLDrawables may trigger GLAD display() via native repaint events.

If using in conjunction w/ AWT, i.e. NewtCanvasAWT and setupPrinting(..) has been called
and it's attched to the TR .. it could happen that display tries to issue beginTile()
before the TR is being setup.

This patch mitigates this issue (while not removing it) by querying whether setup is completed.

src/jogl/classes/com/jogamp/opengl/util/RandomTileRenderer.java

@@ -89,6 +89,11 @@ public void setTileRect(int tX, int tY, int tWidth, int tHeight) throws IllegalS
         tileRectSet = true;
     }
 
+    @Override
+    public final boolean isSetup() {
+        return 0 < imageSize.getWidth() && 0 < imageSize.getHeight() && tileRectSet;
+    }
+
     /**
      * {@inheritDoc}
      * @throws IllegalStateException if image-size or tileRect has not been set

src/jogl/classes/com/jogamp/opengl/util/TileRenderer.java

@@ -336,9 +336,14 @@ public final void setRowOrder(int order) {
         }
     }
 
+    @Override
+    public final boolean isSetup() {
+        return 0 < imageSize.getWidth() && 0 < imageSize.getHeight();
+    }
+
     @Override
     public final void beginTile( GL gl ) throws IllegalStateException, GLException {
-        if( 0 >= imageSize.getWidth() || 0 >= imageSize.getHeight() ) {
+        if( !isSetup() ) {
             throw new IllegalStateException("Image size has not been set");        
         }
         validateGL(gl);

src/jogl/classes/com/jogamp/opengl/util/TileRendererBase.java

@@ -313,6 +313,13 @@ public final void setImageBuffer(GLPixelBuffer buffer) {
         }        
     }
 
+    /** 
+     * Returns true if this instance is setup properly, i.e. {@link #setImageSize(int, int)} ..,
+     * and ready for {@link #beginTile(GL)}.
+     * Otherwise returns false.
+     */
+    public abstract boolean isSetup();
+
     /**
      * Begins rendering a tile.
      * <p>
@@ -577,6 +584,12 @@ public void dispose(GLAutoDrawable drawable) {
         }
         @Override
         public void display(GLAutoDrawable drawable) {
+            if( !isSetup() ) {
+                if( DEBUG ) {
+                    System.err.println("TileRenderer.glel.display: !setup: "+TileRendererBase.this);
+                }
+                return;
+            }
             if( null != glEventListenerPre ) {
                 glEventListenerPre.reshape(drawable, 0, 0, currentTileWidth, currentTileHeight);
                 glEventListenerPre.display(drawable);