Right - and the ImageGenerator here is doing basically what the ImageServer does.
I'm not sure what more to advise you to check - I've not seen or heard about the problem you're describing in some time, so you might want to check out 4.6.5 and see if helps, either through improvements in the Layer code or any ImageServer updates that have been added over the last couple of years. The ImageServer code would be single-threaded, so there shouldn't be dispose() issues that concern you.
If you want to send me your code and some data you're using, I can see if I get the same results.
- Don
On Jan 21, 2010, at 3:27 PM, Carsten Madsen wrote:
> Hello John
>
> Here is a simple OM based image generator and an example that uses it render the image into a jpanel. Just add your layers to props and the layer names to layers vector in the S52ImageGenerator.
>
> BR
> Carsten
>
>
> import java.awt.Graphics;
> import java.awt.Graphics2D;
> import java.awt.RenderingHints;
> import java.awt.event.MouseEvent;
> import java.awt.event.MouseListener;
> import java.awt.event.MouseWheelEvent;
> import java.awt.event.MouseWheelListener;
> import java.awt.event.WindowAdapter;
> import java.awt.event.WindowEvent;
> import java.awt.image.BufferedImage;
> import java.util.Properties;
> import java.util.Vector;
>
> import javax.swing.JFrame;
> import javax.swing.JPanel;
> import javax.swing.SwingUtilities;
>
> import com.bbn.openmap.LatLonPoint;
> import com.bbn.openmap.Layer;
> import com.bbn.openmap.LayerHandler;
> import com.bbn.openmap.proj.LLXY;
> import com.bbn.openmap.proj.Proj;
> import com.bbn.openmap.util.Debug;
>
> public class BufferedImageDemo {
>
> final static int WIDTH = 400;
>
> final static int HEIGHT = 400;
>
> static class S52ImageGenerator {
>
> private Layer[] layerArray;
>
> S52ImageGenerator() {
> Properties props = new Properties();
>
> // # Specify shapefile and spatial-index file as a filename or
> // pathname.
> // # If the former, you must reference the directory where this file
> // # lives in your CLASSPATH
> // #shapePolitical.shapeFile=data/shape/dcwpo-browse.shp
> // #shapePolitical.spatialIndex=data/shape/dcwpo-browse.ssx
> // props.put("shapePolitical.class",
> // "com.bbn.openmap.layer.shape.ShapeLayer");
> // props.put("shapePolitical.prettyName", "Political Boundaries");
> // props.put("shapePolitical.shapeFile",
> // "/opt/openmap-4.6.3/share/data/shape/cntry02/cntry02.shp");
> // props.put("shapePolitical.spatialIndex",
> // "/opt/openmap-4.6.3/share/data/shape/cntry02/cntry02.ssx");
> // // # Colors (32bit ARGB)
> // props.put("shapePolitical.lineColor", "ff000000");
> // props.put("shapePolitical.fillColor", "ffbdde83");
>
> // debug openmap layer creation not necessary in production
> Debug.put("layerhandler");
> Debug.put("componentfactory");
> Debug.put("componentfactorydetail");
>
> Vector<String> layers = new Vector<String>();
> layers.add("shapePolitical");
> layerArray = LayerHandler.getLayers(layers, layers, props);
> }
>
> BufferedImage getS52Image(Proj proj) {
> BufferedImage s52image = new BufferedImage(proj.getWidth(), proj
> .getHeight(), BufferedImage.TYPE_INT_ARGB);
> Graphics2D g = s52image.createGraphics();
> g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
> RenderingHints.VALUE_ANTIALIAS_ON);
> for (int i = 0; i < layerArray.length; i++) {
> layerArray[i].renderDataForProjection(proj, g);
> }
> return s52image;
> }
> }
>
> static class S52Panel extends JPanel {
>
> static final float SCALE_FACTOR = 0.1f;
>
> private S52ImageGenerator s52ImageGenerator = new S52ImageGenerator();
>
> // set projection to use for image generation
> private LLXY epsg4326Proj = new LLXY(new LatLonPoint(55f, 10f), 0, 0, 0); // Mecator(....)
>
> S52Panel() {
> epsg4326Proj.setScale(299000);
>
> // make scrollwheel zoom
> addMouseWheelListener(new MouseWheelListener() {
> public void mouseWheelMoved(MouseWheelEvent e) {
> float currentScale = epsg4326Proj.getScale();
> if (e.getWheelRotation() > 0) {
> epsg4326Proj.setScale(currentScale
> * (1f + (e.getScrollAmount() * SCALE_FACTOR)));
> } else {
> epsg4326Proj.setScale(currentScale
> * (1f - (e.getScrollAmount() * SCALE_FACTOR)));
> }
> repaint();
> }
> });
>
> // make mouse click pan
> addMouseListener(new MouseListener() {
>
> public void mouseClicked(MouseEvent e) {
> LatLonPoint newCenter = epsg4326Proj.inverse(e.getPoint());
> epsg4326Proj.setCenter(newCenter);
> repaint();
> }
>
> public void mouseEntered(MouseEvent e) {
> }
>
> public void mouseExited(MouseEvent e) {
> }
>
> public void mousePressed(MouseEvent e) {
> }
>
> public void mouseReleased(MouseEvent e) {
> }
>
> });
> }
>
> _at_Override
> public void paint(Graphics g) {
> g.setColor(getBackground());
> g.fillRect(0, 0, getWidth(), getHeight());
> epsg4326Proj.setWidth(getWidth());
> epsg4326Proj.setHeight(getHeight());
> BufferedImage s52Image = s52ImageGenerator
> .getS52Image(epsg4326Proj);
> g.drawImage(s52Image, 0, 0, null);
> }
>
> }
>
> public static void main(String[] args) {
> SwingUtilities.invokeLater(new Runnable() {
> public void run() {
> JFrame f = new JFrame();
> f.addWindowListener(new WindowAdapter() {
> public void windowClosing(WindowEvent e) {
> System.exit(0);
> }
> });
> f.setContentPane(new S52Panel());
> f.setSize(WIDTH, HEIGHT);
> f.setVisible(true);
> }
> });
>
> }
> }
> On 01/20/2010 07:21 PM, John McMahon wrote:
>> All,
>>
>> I’m trying to use OpenMap to generate reports that include images from maps drawn behind the scenes but not shown to the user. The problem seems to be a threading issue:
>>
>> Order things need to happen
>> 1. Layers need to load completely
>> 2. Image needs to be taken from map layers
>> 3. Report needs to be generated using map image
>>
>> Order things are actually happening because of threading
>> 1. Image taken of map layers
>> 2. Layers loading completely
>> 3. Report generated
>>
>> This results in a report that has a blank image ( or the image may only include some layers).
>>
>> Is there some way of getting a flag that tells us when the layers are done loading/drawing?
>>
>> Thanks,
>> John
>
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge MA
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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Received on Thu Jan 21 2010 - 15:58:22 EST