Initial support for multisample / full-scene antialiasing (FSAA);

currently on Windows, X11 and other ports to follow


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/jogl-demos/trunk@29 3298f667-5e0e-4b4a-8ed4-a3559d26a5f4

1 files changed, 181 insertions, 0 deletions

diff --git a/src/demos/multisample/Multisample.java b/src/demos/multisample/Multisample.java
new file mode 100755
index 0000000..a58d219
--- /dev/null
+++ b/src/demos/multisample/Multisample.java
@@ -0,0 +1,181 @@
+/*
+ * Copyright (c) 2003 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
+ * MIDROSYSTEMS, 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.multisample;
+
+import java.awt.*;
+import java.awt.event.*;
+import net.java.games.jogl.*;
+
+public class Multisample {
+  private GLCanvas canvas;
+  private Animator animator;
+  private volatile boolean quit;
+
+  // Simple class to warn if results are not going to be as expected
+  static class MultisampleChooser extends DefaultGLCapabilitiesChooser {
+    public int chooseCapabilities(GLCapabilities desired,
+                                  GLCapabilities[] available,
+                                  int windowSystemRecommendedChoice) {
+      boolean anyHaveSampleBuffers = false;
+      for (int i = 0; i < available.length; i++) {
+        GLCapabilities caps = available[i];
+        if (caps != null && caps.getSampleBuffers()) {
+          anyHaveSampleBuffers = true;
+          break;
+        }
+      }
+      int selection = super.chooseCapabilities(desired, available, windowSystemRecommendedChoice);
+      if (!anyHaveSampleBuffers) {
+        System.err.println("WARNING: antialiasing will be disabled because none of the available pixel formats had it to offer");
+      } else {
+        if (!available[selection].getSampleBuffers()) {
+          System.err.println("WARNING: antialiasing will be disabled because the DefaultGLCapabilitiesChooser didn't supply it");
+        }
+      }
+      return selection;
+    }
+  }
+
+  public static void main(String[] args) {
+    new Multisample().run(args);
+  }
+
+  public void run(String[] args) {
+    GLCapabilities caps = new GLCapabilities();
+    GLCapabilitiesChooser chooser = new MultisampleChooser();
+
+    caps.setSampleBuffers(true);
+    caps.setNumSamples(4);
+    canvas = GLDrawableFactory.getFactory().createGLCanvas(caps, chooser);
+    canvas.addGLEventListener(new Listener());
+    
+    Frame frame = new Frame("Full-scene antialiasing");
+    frame.setLayout(new BorderLayout());
+    canvas.setSize(512, 512);
+    frame.add(canvas, BorderLayout.CENTER);
+    frame.pack();
+    frame.show();
+    frame.setLocation(0, 0);
+    canvas.requestFocus();
+
+    frame.addWindowListener(new WindowAdapter() {
+        public void windowClosing(WindowEvent e) {
+          runExit();
+        }
+      });
+
+    // No antialiasing (for comparison)
+    caps.setSampleBuffers(false);
+    canvas = GLDrawableFactory.getFactory().createGLCanvas(caps);
+    canvas.addGLEventListener(new Listener());
+    
+    frame = new Frame("No antialiasing");
+    frame.setLayout(new BorderLayout());
+    canvas.setSize(512, 512);
+    frame.add(canvas, BorderLayout.CENTER);
+    frame.pack();
+    frame.show();
+    frame.setLocation(512, 0);
+    canvas.requestFocus();
+
+    frame.addWindowListener(new WindowAdapter() {
+        public void windowClosing(WindowEvent e) {
+          runExit();
+        }
+      });
+  }
+
+  class Listener implements GLEventListener {
+    public void init(GLDrawable drawable) {
+      GL gl = drawable.getGL();
+      GLU glu = drawable.getGLU();
+
+      gl.glClearColor(0, 0, 0, 0);
+      //      gl.glEnable(GL.GL_DEPTH_TEST);
+      //      gl.glDepthFunc(GL.GL_LESS);
+
+      gl.glMatrixMode(GL.GL_MODELVIEW);
+      gl.glLoadIdentity();
+      gl.glMatrixMode(GL.GL_PROJECTION);
+      gl.glLoadIdentity();
+      gl.glOrtho(-1, 1, -1, 1, -1, 1);
+    }
+
+    public void display(GLDrawable drawable) {
+      GL gl = drawable.getGL();
+      GLU glu = drawable.getGLU();
+
+      gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
+
+      int numSteps = 20;
+      double increment = Math.PI / numSteps;
+      double radius = 1;
+
+      gl.glBegin(GL.GL_LINES);
+      for (int i = numSteps - 1; i >= 0; i--) {
+        gl.glVertex3d(radius * Math.cos(i * increment),
+                      radius * Math.sin(i * increment),
+                      0);
+        gl.glVertex3d(-1.0 * radius * Math.cos(i * increment),
+                      -1.0 * radius * Math.sin(i * increment),
+                      0);
+      }
+      gl.glEnd();
+    }
+
+    // Unused routines
+    public void reshape(GLDrawable drawable, int x, int y, int width, int height) {}
+    public void displayChanged(GLDrawable drawable, boolean modeChanged, boolean deviceChanged) {}
+  }
+
+  private void runExit() {
+    quit = true;
+    // Note: calling System.exit() synchronously inside the draw,
+    // reshape or init callbacks can lead to deadlocks on certain
+    // platforms (in particular, X11) because the JAWT's locking
+    // routines cause a global AWT lock to be grabbed. Instead run
+    // the exit routine in another thread.
+    new Thread(new Runnable() {
+        public void run() {
+          System.exit(0);
+        }
+      }).start();
+  }
+}