Okay; so JPanel does double buffering by default (so your paint method is being passed a Graphics object that is backed onto a BuferedImage - check it out in a debugger). Needless to say this is not what you want for performance...
Have a read of this: - http://www.exampledepot.com/egs/java.awt.image/VolImage.html Now there is a good chance I am leading you down the garden path here; performance tuning is a difficult balance. Please try rendering to a VolatileImage and let it me know if it works in your situation. I know it does wonders for doing the usual range of JAI activities; but resampling down onto disk may stretch the limits. The source code for JAI is online; you may want to look exactly at what DisplayJAI is doing. Cheers, Jody > I append the full source code[1] but the painting part is: > > private class PanelMap extends JPanel { > > @Override > public void paint(Graphics g) { > try { > Graphics2D g2d = (Graphics2D) g; > Rectangle rectangle = new Rectangle(getSize()); > > //System.out.println("Map size (px): "+ rectangle.height > + "x" + rectangle.width); > > renderer.paint(g2d, rectangle, > mapContext.getLayerBounds()); > } catch (IOException ex) { > > Logger.getLogger(PanelGeoMap.class.getName()).log(Level.SEVERE, > null, ex); > } > } > } > > I override the JPanel's paint method. PanelMap is inside a JScrollPane > and the renderer, in theory, only have to draw the visible viewport. > ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
