AWTTilePainter.setupGraphics2DAndClipBounds(): Use 'Shape getClip()'; Use double precicion clip bounds 'all the way'; Explicitly scale image and clip w/ current scaled transform.

- Use 'Shape getClip()'
  Don't assume Rectangle2D, but use Shape's getBounds2D()

- Use double precicion clip bounds 'all the way'
  Remove rounding error on clip bounds w/ start value, which was _not_ using doubles.

- Explicitly scale image and clip w/ current scaled transform.
  Instead of abusing Graphics2D's clip shape to scale image size and clip-area,
  explicitly use transform both bounding boxes into transformed space,
  scale space and transform out (inversion).
  A possible NoninvertibleTransformException will be thrown while Graphics2D has not been modified.

1 files changed, 17 insertions, 11 deletions

diff --git a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
index c66fba70b..e9d1b38d2 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
@@ -48,6 +48,7 @@ import java.awt.Graphics2D;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsEnvironment;
 import java.awt.Rectangle;
+import java.awt.geom.NoninvertibleTransformException;
 import java.awt.geom.Rectangle2D;
 import java.awt.image.BufferedImage;
 import java.awt.image.DataBufferInt;
@@ -612,18 +613,23 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable, WindowClosing
       handleReshape = false; // ditto
       
       final Graphics2D g2d = (Graphics2D)graphics;
-      printAWTTiles.setupGraphics2DAndClipBounds(g2d, getWidth(), getHeight());
       try {
-          final TileRenderer tileRenderer = printAWTTiles.renderer; 
-          do {
-              if( printGLAD != GLJPanel.this ) {
-                  tileRenderer.display();
-              } else {
-                  backend.doPlainPaint();
-              }
-          } while ( !tileRenderer.eot() );
-      } finally {
-          printAWTTiles.resetGraphics2D();
+          printAWTTiles.setupGraphics2DAndClipBounds(g2d, getWidth(), getHeight());
+          try {
+              final TileRenderer tileRenderer = printAWTTiles.renderer; 
+              do {
+                  if( printGLAD != GLJPanel.this ) {
+                      tileRenderer.display();
+                  } else {
+                      backend.doPlainPaint();
+                  }
+              } while ( !tileRenderer.eot() );
+          } finally {
+              printAWTTiles.resetGraphics2D();
+          }
+      } catch (NoninvertibleTransformException nte) {
+          System.err.println("Catched: Inversion failed of: "+g2d.getTransform());
+          nte.printStackTrace();
       }
       if( DEBUG ) {
           System.err.println("AWT print.X: "+printAWTTiles);