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/*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package demos.j2d;
import com.sun.opengl.util.awt.Overlay;
import demos.gears.Gears;
import demos.util.*;
import gleem.linalg.*;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.text.DecimalFormat;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.awt.GLCanvas;
import com.sun.opengl.util.Animator;
/** A simple test of the Overlay utility class. Draws gears underneath
with moving Java 2D-rendered text on top. */
public class TestOverlay implements GLEventListener {
public static void main(String[] args) {
Frame frame = new Frame("Java 2D Overlay Test");
GLCapabilities caps = new GLCapabilities(null);
caps.setAlphaBits(8);
GLCanvas canvas = new GLCanvas(caps);
canvas.addGLEventListener(new Gears());
canvas.addGLEventListener(new TestOverlay());
frame.add(canvas);
frame.setSize(512, 512);
final Animator animator = new Animator(canvas);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
// Run this on another thread than the AWT event queue to
// make sure the call to Animator.stop() completes before
// exiting
new Thread(new Runnable() {
public void run() {
animator.stop();
System.exit(0);
}
}).start();
}
});
frame.setVisible(true);
animator.start();
}
private Overlay overlay;
private Time time;
private Font font;
private Color TRANSPARENT_BLACK = new Color(0.0f, 0.0f, 0.0f, 0.0f);
private FontRenderContext frc;
private GlyphVector gv;
private Vec2f velocity = new Vec2f(100.0f, 150.0f);
private Vec2f position;
private Rectangle textBounds;
private Rectangle lastTextBounds;
private String TEST_STRING = "Java 2D Text";
private long startTime;
private int frameCount;
private DecimalFormat format = new DecimalFormat("####.00");
private Rectangle fpsBounds;
public void init(GLAutoDrawable drawable) {
GL gl = drawable.getGL();
gl.setSwapInterval(0);
overlay = new Overlay(drawable);
time = new SystemTime();
((SystemTime) time).rebase();
// Start the text half way up the left side
position = new Vec2f(0.0f, drawable.getHeight() / 2);
// Create the font, render context, and glyph vector
font = new Font("SansSerif", Font.BOLD, 36);
}
public void dispose(GLAutoDrawable drawable) {
font = null;
overlay = null;
time = null;
position = null;
}
public void display(GLAutoDrawable drawable) {
if (startTime == 0) {
startTime = System.currentTimeMillis();
}
Graphics2D g2d = overlay.createGraphics();
if (++frameCount == 30) {
long endTime = System.currentTimeMillis();
float fps = 30.0f / (float) (endTime - startTime) * 1000;
frameCount = 0;
startTime = System.currentTimeMillis();
FontRenderContext frc = g2d.getFontRenderContext();
String fpsString = "FPS: " + format.format(fps);
GlyphVector gv = font.createGlyphVector(frc, TEST_STRING);
fpsBounds = gv.getPixelBounds(frc, 0, 0);
int x = drawable.getWidth() - fpsBounds.width - 20;
int y = drawable.getHeight() - 20;
g2d.setFont(font);
g2d.setComposite(AlphaComposite.Src);
g2d.setColor(TRANSPARENT_BLACK);
g2d.fillRect(x + fpsBounds.x, y + fpsBounds.y, fpsBounds.width, fpsBounds.height);
g2d.setColor(Color.WHITE);
g2d.drawString(fpsString, x, y);
overlay.markDirty(x + fpsBounds.x, y + fpsBounds.y, fpsBounds.width, fpsBounds.height);
}
time.update();
g2d.setFont(font);
g2d.setComposite(AlphaComposite.Src);
if (overlay.contentsLost()) {
frc = g2d.getFontRenderContext();
gv = font.createGlyphVector(frc, TEST_STRING);
}
// Compute the next position of the text
position = position.plus(velocity.times((float) time.deltaT()));
// Figure out whether we have to switch directions
textBounds = gv.getPixelBounds(frc, position.x(), position.y());
if (textBounds.getMinX() < 0) {
velocity.setX(Math.abs(velocity.x()));
} else if (textBounds.getMaxX() > drawable.getWidth()) {
velocity.setX(-1.0f * Math.abs(velocity.x()));
}
if (textBounds.getMinY() < 0) {
velocity.setY(Math.abs(velocity.y()));
} else if (textBounds.getMaxY() > drawable.getHeight()) {
velocity.setY(-1.0f * Math.abs(velocity.y()));
}
// Clear the last text (if any) and draw the current
if (lastTextBounds != null) {
g2d.setColor(TRANSPARENT_BLACK);
g2d.fillRect((int) lastTextBounds.getMinX(), (int) lastTextBounds.getMinY(),
(int) (lastTextBounds.getWidth() + 1), (int) (lastTextBounds.getHeight() + 1));
} else if (overlay.contentsLost()) {
g2d.setColor(TRANSPARENT_BLACK);
g2d.fillRect(0, 0, drawable.getWidth(), drawable.getHeight());
}
g2d.setColor(Color.WHITE);
g2d.drawString(TEST_STRING, position.x(), position.y());
// Compute the union of these rectangles to push an update to
// the overlay
Rectangle union = new Rectangle(textBounds);
if (lastTextBounds != null) {
union.add(lastTextBounds);
}
// Put a little slop around this text due to apparent rounding errors
overlay.markDirty(union.x, union.y, union.width + 10, union.height + 10);
// Move down the text bounds
lastTextBounds = textBounds;
// Draw the overlay
overlay.drawAll();
g2d.dispose();
}
// Unused methods
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {}
}
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