[geotk] Next step for WMS

[Sam B]

Ok, thank you.

How do I use DefaultPortrayalService ? I should have a look to the source code...

Here below is a piece of code I just wrote to test volatileimage on this computer. It works correctly, but I'm sure it is possible to improve...

Best regards, and have a nice week-end,

Sam

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.image.BufferedImage;
import java.awt.image.VolatileImage;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JPanel;

public class TestPanel extends JPanel{

    private GraphicsEnvironment env;
    private GraphicsDevice device;
    private GraphicsConfiguration config;
    private VolatileImage vo;

    private BufferedImage globalBU;

    public TestPanel(){

        env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        device = env.getDefaultScreenDevice();


        try {
            globalBU = getBufferedImage();
        } catch (IOException ex) {
            Logger.getLogger(TestPanel.class.getName()).log(Level.SEVERE, null, ex);
        }
        this.setSize(globalBU.getWidth(), globalBU.getHeight());

    }

    private BufferedImage getBufferedImage() throws IOException
    {
        BufferedImage image = ImageIO.read(new File("some_picture.png"));
        config = device.getDefaultConfiguration();
        BufferedImage result = config.createCompatibleImage(image.getWidth(), image.getHeight(), image.getTransparency());
        result.getGraphics().drawImage(image, 0, 0, null);
        result.getGraphics().dispose();
        return result;
    }

     private void createCompatibleVolatileImage()
    {
        config = device.getDefaultConfiguration();
        vo = config.createCompatibleVolatileImage(globalBU.getWidth(), globalBU.getHeight());
    }

     private void renderVolatileImage()
     {
        vo.getGraphics().drawImage(globalBU, 0, 0, null);
     }

     @Override
     public void paint(Graphics g) {
        // Create the VolatileImage
        Graphics2D g2 = (Graphics2D) g;
        createCompatibleVolatileImage();

        do {
            // Test if surface is lost and restore it.
            GraphicsConfiguration gc = this.getGraphicsConfiguration();
            int valCode = vo.validate(gc);

            // No need to check for IMAGE_RESTORED since we are
            // to re-render the image anyway.
            if(valCode==VolatileImage.IMAGE_INCOMPATIBLE){
                createCompatibleVolatileImage();
            }
            // Render to the Image
            renderVolatileImage();
            // Render image to screen.
            //
            g2.drawImage(vo, 0, 0, this);
        // Test if content is lost
        } while(vo.contentsLost());
     }
}


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