TestSymbolPerformance.java

// COpyright 2000-2005, FreeHEP.
package org.freehep.graphicsio.test;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Insets;

import javax.swing.JPanel;

import org.freehep.graphics2d.VectorGraphics;
import org.freehep.graphics2d.VectorGraphicsConstants;

/**
 * @author Charles Loomis
 * @author Mark Donszelmann
 * @version $Id: TestSymbolPerformance.java 8584 2006-08-10 23:06:37Z duns $
 */
public class TestSymbolPerformance extends JPanel {

    public TestSymbolPerformance() {
        setOpaque(false);
    }

    public void paintComponent(Graphics g) {

        VectorGraphics vg = VectorGraphics.create(g);

        Dimension dim = getSize();
        Insets insets = getInsets();

        vg.setColor(Color.RED);
        vg.fillRect(insets.left, insets.top, dim.width - insets.left
                - insets.right, dim.height - insets.top - insets.bottom);

        vg.setColor(Color.BLACK);
        writeSymbols(10000, vg, 0, dim.height / 2, dim.width,
                VectorGraphicsConstants.SYMBOL_STAR, 4);
        writeSymbols(10000, vg, dim.height / 2, dim.height / 2, dim.width,
                VectorGraphicsConstants.SYMBOL_CIRCLE, 256);
    }

    private void writeSymbols(int n, VectorGraphics vg, double yo,
            double height, double width, int type, int levelsPerColor) {

        long start = System.currentTimeMillis();

        for (int i = 0; i < n; i++) {
            double x = Math.random() * width;
            double y = yo + 20 + Math.random() * (height - 20);
            int colorUnit = 256 / levelsPerColor;
            int r = (int) (Math.random() * 256 / colorUnit) * colorUnit;
            int g = (int) (Math.random() * 256 / colorUnit) * colorUnit;
            int b = (int) (Math.random() * 256 / colorUnit) * colorUnit;
            vg.setColor(new Color(r, g, b));
            vg.fillSymbol(x, y, 6, type);
        }
        long end = System.currentTimeMillis();

        vg.setColor(Color.BLACK);
        vg.drawString(n + " symbols of type " + type + " filled in "
                + (end - start) + " ms", 10, yo + 15);
    }

    public static void main(String[] args) {

        // Create a new frame to hold everything.
        TestingFrame frame = new TestingFrame("Test Symbol Performance");

        // Create a new instance of this class and add it to the frame.
        frame.addPanel(new TestSymbolPerformance());

        // Give the frame a size and make it visible.
        frame.pack();
        frame.setSize(new Dimension(600, 600));
        frame.setVisible(true);
    }
}