/* * 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.gl2.GL2Overlay; 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 javax.media.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(); 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 GL2Overlay 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 GL2Overlay(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 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) {} }