Added slight variation of VertexProgRefract demo which embeds the demo

inside a JInternalFrame using the new hardware-accelerated GLJPanel.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/jogl-demos/trunk@46 3298f667-5e0e-4b4a-8ed4-a3559d26a5f4

1 files changed, 781 insertions, 0 deletions

diff --git a/src/demos/jrefract/JRefract.java b/src/demos/jrefract/JRefract.java
new file mode 100755
index 0000000..a2feafe
--- /dev/null
+++ b/src/demos/jrefract/JRefract.java
@@ -0,0 +1,781 @@
+/*
+ * Portions Copyright (C) 2005 Sun Microsystems, Inc.
+ * All rights reserved.
+ */
+
+/*
+ *
+ * COPYRIGHT NVIDIA CORPORATION 2003. ALL RIGHTS RESERVED.
+ * BY ACCESSING OR USING THIS SOFTWARE, YOU AGREE TO:
+ *
+ *  1) ACKNOWLEDGE NVIDIA'S EXCLUSIVE OWNERSHIP OF ALL RIGHTS
+ *     IN AND TO THE SOFTWARE;
+ *
+ *  2) NOT MAKE OR DISTRIBUTE COPIES OF THE SOFTWARE WITHOUT
+ *     INCLUDING THIS NOTICE AND AGREEMENT;
+ *
+ *  3) ACKNOWLEDGE THAT TO THE MAXIMUM EXTENT PERMITTED BY
+ *     APPLICABLE LAW, THIS SOFTWARE IS PROVIDED *AS IS* AND
+ *     THAT NVIDIA AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES,
+ *     EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
+ *     TO, IMPLIED WARRANTIES OF MERCHANTABILITY  AND FITNESS
+ *     FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL NVIDIA OR ITS SUPPLIERS BE LIABLE FOR ANY
+ * SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES
+ * WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS
+ * OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS
+ * INFORMATION, OR ANY OTHER PECUNIARY LOSS), INCLUDING ATTORNEYS'
+ * FEES, RELATING TO THE USE OF OR INABILITY TO USE THIS SOFTWARE,
+ * EVEN IF NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+package demos.jrefract;
+
+import java.awt.*;
+import java.awt.event.*;
+import java.awt.image.*;
+import java.io.*;
+import java.nio.*;
+import java.util.*;
+import javax.imageio.*;
+import javax.imageio.stream.*;
+import javax.swing.*;
+
+import net.java.games.jogl.*;
+import net.java.games.jogl.util.*;
+import demos.util.*;
+import gleem.*;
+import gleem.linalg.*;
+
+/**
+  Wavelength-dependent refraction demo<br>
+  It's a chromatic aberration!<br>
+  [email protected] 4/2001<br><p>
+
+  Currently 3 passes - could do it in 1 with 4 texture units<p>
+
+  Cubemap courtesy of Paul Debevec<p>
+
+  Ported to Java, Swing and ARB_fragment_program by Kenneth Russell
+*/
+
+public class JRefract {
+  private boolean useRegisterCombiners;
+  private GLJPanel canvas;
+  private Animator animator;
+  private volatile boolean quit;
+
+  public static void main(String[] args) {
+    new JRefract().run(args);
+  }
+
+  public void run(String[] args) {
+
+    JFrame frame = new JFrame("JOGL and Swing Interoperability");
+    JDesktopPane desktop = new JDesktopPane();
+    desktop.setSize(1024, 768);
+    JInternalFrame inner = new JInternalFrame("Refraction Using Vertex Programs");
+    inner.setResizable(true);
+
+    canvas = GLDrawableFactory.getFactory().createGLJPanel(new GLCapabilities());
+    canvas.addGLEventListener(new Listener());
+    canvas.setSize(512, 512);
+    canvas.addMouseListener(new MouseAdapter() {
+        public void mouseClicked(MouseEvent e) {
+          canvas.requestFocus();
+        }
+      });
+
+    inner.getContentPane().setLayout(new BorderLayout());
+    inner.getContentPane().add(canvas, BorderLayout.CENTER);
+    inner.getContentPane().add(new JButton("West"), BorderLayout.WEST);
+    inner.getContentPane().add(new JButton("East"), BorderLayout.EAST);
+    inner.getContentPane().add(new JButton("North"), BorderLayout.NORTH);
+    inner.getContentPane().add(new JButton("South"), BorderLayout.SOUTH);
+    inner.setSize(canvas.getSize());
+    frame.getContentPane().setLayout(new BorderLayout());
+    frame.getContentPane().add(desktop, BorderLayout.CENTER);
+    desktop.add(inner);
+    inner.setVisible(true);
+
+    JInternalFrame inner2 = new JInternalFrame("Hello, World");
+    JLabel label = new JLabel("Hello, World!");
+    label.setFont(new Font("SansSerif", Font.PLAIN, 128));
+    inner2.getContentPane().add(label);
+    inner2.pack();
+    inner2.setResizable(true);
+    desktop.add(inner2);
+    inner2.setVisible(true);
+
+    animator = new Animator(canvas);
+    frame.addWindowListener(new WindowAdapter() {
+        public void windowClosing(WindowEvent e) {
+          runExit();
+        }
+      });
+    frame.setSize(desktop.getSize());
+    frame.setVisible(true);
+    animator.start();
+  }
+
+  class Listener implements GLEventListener {
+    private boolean firstRender = true;
+    private int vtxProg;
+    private int fragProg;
+    private int cubemap;
+    private int bunnydl;
+    private int obj;
+
+    private GLUT glut = new GLUT();
+
+    private ExaminerViewer viewer;
+    private boolean doViewAll = true;
+
+    private Time  time = new SystemTime();
+    private float animRate = (float) Math.toRadians(-6.0f); // Radians / sec
+
+    private float refract = 1.1f;           // ratio of indicies of refraction
+    private float wavelengthDelta = 0.05f;  // difference in refraction for each "wavelength" (R,G,B)
+    private float fresnel = 2.0f;           // Fresnel multiplier
+
+    private boolean wire = false;
+    private boolean toggleWire = false;
+
+    private static final String transformRefract = 
+"!!ARBvp1.0\n" +
+"# Refraction\n" +
+"\n" +
+"# Parameters\n" +
+"PARAM mvp [4]       = { state.matrix.mvp };     # modelview projection matrix\n" +
+"PARAM mvit[4]       = { state.matrix.modelview.invtrans }; # modelview matrix inverse transpose\n" +
+"PARAM mv  [4]       = { state.matrix.modelview }; # modelview matrix\n" +
+"PARAM tex [4]       = { state.matrix.texture }; # texture matrix\n" +
+"PARAM eyePosition   = program.env[0];           # eye position\n" +
+"PARAM fresnel       = program.env[1];           # fresnel multiplier\n" +
+"PARAM texScale      = program.env[2];           # texture scale\n" +
+"PARAM misc          = program.env[3];           # misc. constants\n" +
+"PARAM refraction    = program.env[4];           # refractive index\n" +
+"\n" +
+"# Per vertex inputs\n" +
+"ATTRIB iPos         = vertex.position;          #position\n" +
+"ATTRIB iCol0        = vertex.color;             #color\n" +
+"ATTRIB iNorm        = vertex.normal;            #normal\n" +
+"\n" +
+"# Temporaries\n" +
+"TEMP r0;\n" +
+"TEMP r1;\n" +
+"TEMP r2;\n" +
+"TEMP r3;\n" +
+"TEMP r8;\n" +
+"TEMP r9;\n" +
+"TEMP r11;\n" +
+"\n" +
+"# Outputs\n" +
+"OUTPUT oPos         = result.position;          #position\n" +
+"OUTPUT oCol0        = result.color;             #primary color\n" +
+"OUTPUT oTex0        = result.texcoord[0];       #texture coordinate set 0\n" +
+"OUTPUT oTex1        = result.texcoord[1];       #texture coordinate set 1\n" +
+"\n" +
+"\n" +
+"# transform vertex position to eye space\n" +
+"DP4    r9.x, mv[0], iPos ;\n" +
+"DP4    r9.y, mv[1], iPos ;\n" +
+"DP4    r9.z, mv[2], iPos ;\n" +
+"DP4    r9.w, mv[3], iPos ;\n" +
+"\n" +
+"# transform normal to eye space\n" +
+"DP3    r11.x, mvit[0], iNorm ;\n" +
+"DP3    r11.y, mvit[1], iNorm ;\n" +
+"DP3    r11.z, mvit[2], iNorm ;\n" +
+"\n" +
+"# vertex->eye vector\n" +
+"ADD    r0, -r9, eyePosition;\n" +
+"\n" +
+"# normalize\n" +
+"DP3    r8.w, r0, r0;\n" +
+"RSQ    r8.w, r8.w;\n" +
+"MUL    r8, r0, r8.w;       # r8 = eye/incident vector\n" +
+"\n" +
+"# refraction, Renderman style\n" +
+"\n" +
+"# float IdotN = I.N;\n" +
+"# float k = 1 - eta*eta*(1 - IdotN*IdotN);\n" +
+"# return k < 0 ? (0,0,0) : eta*I - (eta*IdotN + sqrt(k))*N;\n" +
+"\n" +
+"DP3    r0.x, r11, -r8;             # r0 = N.I\n" +
+"\n" +
+"MAD    r1.x, -r0.x, r0.x, misc.y;  # r1 = -IdotN*IdotN + 1\n" +
+"MUL    r1.x, r1.x, refraction.y;   # r1 = -(r1*eta*eta)+1\n" +
+"ADD    r1.x, misc.y, -r1.x;\n" +
+"\n" +
+"RSQ    r2.x, r1.x;\n" +
+"RCP    r2.x, r2.x;\n" +
+"MAD    r2.x, refraction.x, r0.x, r2.x;\n" +
+"MUL    r2, r11, r2.x;\n" +
+"MAD    r2, refraction.x, -r8, r2;\n" +
+"\n" +
+"# transform refracted ray by cubemap transform\n" +
+"DP3    oTex0.x, tex[0], r2;\n" +
+"DP3    oTex0.y, tex[1], r2;\n" +
+"DP3    oTex0.z, tex[2], r2;\n" +
+"\n" +
+"# calculate reflection\n" +
+"MUL    r0, r11, misc.z;\n" +
+"DP3    r3.w, r11, r8;\n" +
+"MAD    r3, r3.w, r0, -r8;\n" +
+"\n" +
+"# transform reflected ray by cubemap transform\n" +
+"DP3    oTex1.x, tex[0], r3;\n" +
+"DP3    oTex1.y, tex[1], r3;\n" +
+"DP3    oTex1.z, tex[2], r3;\n" +
+"\n" +
+"# cheesy Fresnel approximation = (1-(I.N))^p\n" +
+"DP3    r0.x, r8, r11;\n" +
+"ADD    r0.x, misc.y, -r0.x;\n" +
+"MUL    r0.x, r0.x, r0.x;\n" +
+"MUL    oCol0, r0.x, fresnel;\n" +
+"\n" +
+"# transform vertex to clip space\n" +
+"DP4    oPos.x, mvp[0], iPos ;\n" +
+"DP4    oPos.y, mvp[1], iPos ;\n" +
+"DP4    oPos.z, mvp[2], iPos ;\n" +
+"DP4    oPos.w, mvp[3], iPos ;\n" +
+"\n" +
+"END\n";
+
+    public void init(GLDrawable drawable) {
+      GL gl = drawable.getGL();
+      GLU glu = drawable.getGLU();
+      float cc = 1.0f;
+      gl.glClearColor(cc, cc, cc, 1);
+      gl.glColor3f(1,1,1);
+      gl.glEnable(GL.GL_DEPTH_TEST);
+
+      try {
+        initExtension(gl, "GL_ARB_vertex_program");
+        initExtension(gl, "GL_ARB_multitexture");
+        if (!gl.isExtensionAvailable("GL_ARB_fragment_program")) {
+          if (gl.isExtensionAvailable("GL_NV_register_combiners")) {
+            useRegisterCombiners = true;
+          } else {
+            final String message = "This demo requires either the GL_ARB_fragment_program\n" +
+                                   "or GL_NV_register_combiners extension";
+            new Thread(new Runnable() {
+                public void run() {
+                  JOptionPane.showMessageDialog(null, message, "Unavailable extension", JOptionPane.ERROR_MESSAGE);
+                  runExit();
+                }
+              }).start();
+            throw new RuntimeException(message);
+          }
+        }
+      } catch (RuntimeException e) {
+        quit = true;
+        throw(e);
+      }
+
+      b[' '] = true; // animate by default
+
+      int[] vtxProgTmp = new int[1];
+      gl.glGenProgramsARB(1, vtxProgTmp);
+      vtxProg = vtxProgTmp[0];
+      gl.glBindProgramARB  (GL.GL_VERTEX_PROGRAM_ARB, vtxProg);
+      gl.glProgramStringARB(GL.GL_VERTEX_PROGRAM_ARB, GL.GL_PROGRAM_FORMAT_ASCII_ARB, transformRefract.length(), transformRefract);
+
+      gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 0, 0.0f, 0.0f, 0.0f, 1.0f);    // eye position
+
+      gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 1, fresnel, fresnel, fresnel, 1.0f);    // fresnel multiplier
+
+      gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 2, 1.0f, -1.0f, 1.0f, 0.0f);   // texture scale
+      gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 3, 0.0f, 1.0f, 2.0f, 3.0f);    // misc constants
+
+      int[] cubemapTmp = new int[1];
+      gl.glGenTextures(1, cubemapTmp);
+      cubemap = cubemapTmp[0];
+      gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP_ARB, cubemap);
+
+      gl.glTexParameteri(GL.GL_TEXTURE_CUBE_MAP_ARB, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
+      gl.glTexParameteri(GL.GL_TEXTURE_CUBE_MAP_ARB, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR_MIPMAP_LINEAR);
+
+      try {
+        loadPNGCubemap(gl, glu, "demos/data/cubemaps/uffizi", true);
+      } catch (IOException e) {
+        runExit();
+        throw new RuntimeException(e);
+      }
+
+      gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_REPLACE);
+
+      gl.glDisable(GL.GL_CULL_FACE);
+
+      if (useRegisterCombiners) {
+        initCombiners(gl);
+      } else {
+        initFragmentProgram(gl);
+      }
+
+      try {
+        bunnydl = Bunny.gen3DObjectList(gl);
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+
+      drawable.addKeyListener(new KeyAdapter() {
+          public void keyTyped(KeyEvent e) {
+            dispatchKey(e.getKeyChar());
+          }
+        });
+
+      doViewAll = true;
+
+      // Do this only once per drawable, not once each time the OpenGL
+      // context is created
+      if (firstRender) {
+        firstRender = false;
+
+        drawable.addKeyListener(new KeyAdapter() {
+            public void keyTyped(KeyEvent e) {
+              dispatchKey(e.getKeyChar());
+            }
+          });
+
+        // Register the window with the ManipManager
+        ManipManager manager = ManipManager.getManipManager();
+        manager.registerWindow(drawable);
+
+        viewer = new ExaminerViewer(MouseButtonHelper.numMouseButtons());
+        viewer.setNoAltKeyMode(true);
+        viewer.attach(drawable, new BSphereProvider() {
+            public BSphere getBoundingSphere() {
+              return new BSphere(new Vec3f(0, 0, 0), 1.0f);
+            }
+          });
+        viewer.setVertFOV((float) (15.0f * Math.PI / 32.0f));
+        viewer.setZNear(0.1f);
+        viewer.setZFar(10.0f);
+      }
+    }
+
+    public void display(GLDrawable drawable) {
+      if (quit) {
+        return;
+      }
+
+      time.update();
+
+      GL gl = drawable.getGL();
+      GLU glu = drawable.getGLU();
+      gl.glClear(GL.GL_COLOR_BUFFER_BIT|GL.GL_DEPTH_BUFFER_BIT);
+
+      if (doViewAll) {
+        System.err.println("viewer.viewAll()");
+	viewer.viewAll(gl);
+	doViewAll = false;
+      }
+
+      if (getFlag(' ')) {
+        viewer.rotateAboutFocalPoint(new Rotf(Vec3f.Y_AXIS, (float) (time.deltaT() * animRate)));
+      }
+
+      if (toggleWire) {
+        toggleWire = false;
+        wire = !wire;
+        if (wire) {
+          gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE);
+        } else {
+          gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
+        }
+      }
+
+      // draw background
+      gl.glDisable(GL.GL_DEPTH_TEST);
+      drawSkyBox(gl, glu);
+      gl.glEnable(GL.GL_DEPTH_TEST);
+
+      gl.glPushMatrix();
+
+      viewer.update(gl);
+      ManipManager.getManipManager().updateCameraParameters(drawable, viewer.getCameraParameters());
+      ManipManager.getManipManager().render(drawable, gl);
+
+      gl.glBindProgramARB(GL.GL_VERTEX_PROGRAM_ARB, vtxProg);
+
+      gl.glEnable(GL.GL_VERTEX_PROGRAM_ARB);
+      gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 62, fresnel, fresnel, fresnel, 1.0f);
+
+      // set texture transforms
+      gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB);
+      gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP_ARB, cubemap);
+      gl.glEnable(GL.GL_TEXTURE_CUBE_MAP_ARB);
+      gl.glMatrixMode(GL.GL_TEXTURE);
+      gl.glLoadIdentity();
+      gl.glScalef(1.0f, -1.0f, 1.0f);
+      viewer.updateInverseRotation(gl);
+
+      gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB);
+      gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP_ARB, cubemap);
+      gl.glEnable(GL.GL_TEXTURE_CUBE_MAP_ARB);
+      gl.glMatrixMode(GL.GL_TEXTURE);
+      gl.glLoadIdentity();
+      gl.glScalef(1.0f, -1.0f, 1.0f);
+      viewer.updateInverseRotation(gl);
+
+      if (useRegisterCombiners) {
+        gl.glEnable(GL.GL_REGISTER_COMBINERS_NV);
+      } else {
+        gl.glBindProgramARB(GL.GL_FRAGMENT_PROGRAM_ARB, fragProg);
+        gl.glEnable(GL.GL_FRAGMENT_PROGRAM_ARB);
+      }
+
+      gl.glColor3f(1.0f, 1.0f, 1.0f);
+
+      if (getFlag('s')) {
+        // single pass
+        setRefraction(gl, refract);
+        drawObj(gl, glu, obj);
+
+      } else {
+        // red pass
+        gl.glColorMask(true, false, false, false);
+        setRefraction(gl, refract);
+        drawObj(gl, glu, obj);
+  
+        gl.glDepthMask(false);
+        gl.glDepthFunc(GL.GL_EQUAL);
+
+        // green pass
+        gl.glColorMask(false, true, false, false);
+        setRefraction(gl, refract + wavelengthDelta);
+        drawObj(gl, glu, obj);
+
+        // blue pass
+        gl.glColorMask(false, false, true, false);
+        setRefraction(gl, refract + (wavelengthDelta * 2));
+        drawObj(gl, glu, obj);
+
+        gl.glDepthMask(true);
+        gl.glDepthFunc(GL.GL_LESS);
+        gl.glColorMask(true, true, true, false);
+      }
+
+      if (useRegisterCombiners) {
+        gl.glDisable(GL.GL_REGISTER_COMBINERS_NV);
+      } else {
+        gl.glDisable(GL.GL_FRAGMENT_PROGRAM_ARB);
+      }
+      gl.glDisable(GL.GL_VERTEX_PROGRAM_ARB);
+
+      gl.glMatrixMode(GL.GL_MODELVIEW);
+      gl.glPopMatrix();
+    }
+
+    // Unused routines
+    public void reshape(GLDrawable drawable, int x, int y, int width, int height) {}
+    public void displayChanged(GLDrawable drawable, boolean modeChanged, boolean deviceChanged) {}
+
+    //----------------------------------------------------------------------
+    // Internals only below this point
+    //
+    private boolean[] b = new boolean[256];
+    private void dispatchKey(char k) {
+      setFlag(k, !getFlag(k));
+      // Quit on escape or 'q'
+      if ((k == (char) 27) || (k == 'q')) {
+        runExit();
+	return;
+      }
+
+      switch (k) {
+        case '1':
+	  obj = 0;
+	  break;
+
+        case '2':
+	  obj = 1;
+	  break;
+
+        case '3':
+	  obj = 2;
+	  break;
+
+        case '4':
+	  obj = 3;
+	  break;
+
+        case 'v':
+	  doViewAll = true;
+	  break;
+
+        case 'w':
+          toggleWire = true;
+          break;
+
+        default:
+	  break;
+      }
+    }
+
+    private void setFlag(char key, boolean val) {
+      b[((int) key) & 0xFF] = val;
+    }
+
+    private boolean getFlag(char key) {
+      return b[((int) key) & 0xFF];
+    }
+
+    // FIXME: note we found that we had to swap the negy and posy portions of the cubemap.
+    // Not sure why this is the case. Vertical flip in the image read? Possible, but doesn't
+    // appear to be the case (have tried this and produced wrong results at the time).
+    String[] suffixes = { "posx", "negx", "negy", "posy", "posz", "negz" };
+    int[] targets = { GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
+                      GL.GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
+                      GL.GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
+                      GL.GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
+                      GL.GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
+                      GL.GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB };
+    private void loadPNGCubemap(GL gl, GLU glu, String baseName, boolean mipmapped) throws IOException {
+      for (int i = 0; i < suffixes.length; i++) {
+        String resourceName = baseName + "_" + suffixes[i] + ".png";
+        // Note: use of BufferedInputStream works around 4764639/4892246
+	BufferedImage img = ImageIO.read(new BufferedInputStream(getClass().getClassLoader().getResourceAsStream(resourceName)));
+	if (img == null) {
+	  throw new RuntimeException("Error reading PNG image " + resourceName);
+	}
+        makeRGBTexture(gl, glu, img, targets[i], mipmapped);
+      }
+    }
+
+    private void makeRGBTexture(GL gl, GLU glu, BufferedImage img, int target, boolean mipmapped) {
+      ByteBuffer dest = null;
+      switch (img.getType()) {
+        case BufferedImage.TYPE_3BYTE_BGR:
+        case BufferedImage.TYPE_CUSTOM: {
+          byte[] data = ((DataBufferByte) img.getRaster().getDataBuffer()).getData();
+          dest = ByteBuffer.allocateDirect(data.length);
+          dest.order(ByteOrder.nativeOrder());
+          dest.put(data, 0, data.length);
+          break;
+        }
+
+        case BufferedImage.TYPE_INT_RGB: {
+          int[] data = ((DataBufferInt) img.getRaster().getDataBuffer()).getData();
+          dest = ByteBuffer.allocateDirect(data.length * BufferUtils.SIZEOF_INT);
+          dest.order(ByteOrder.nativeOrder());
+          dest.asIntBuffer().put(data, 0, data.length);
+          break;
+        }
+
+        default:
+          throw new RuntimeException("Unsupported image type " + img.getType());
+      }
+
+      if (mipmapped) {
+        glu.gluBuild2DMipmaps(target, GL.GL_RGB8, img.getWidth(), img.getHeight(), GL.GL_RGB,
+                              GL.GL_UNSIGNED_BYTE, dest);
+      } else {
+        gl.glTexImage2D(target, 0, GL.GL_RGB, img.getWidth(), img.getHeight(), 0,
+                        GL.GL_RGB, GL.GL_UNSIGNED_BYTE, dest);
+      }
+    }
+
+    private void initExtension(GL gl, String glExtensionName) {
+      if (!gl.isExtensionAvailable(glExtensionName)) {
+        final String message = "OpenGL extension \"" + glExtensionName + "\" not available";
+        new Thread(new Runnable() {
+            public void run() {
+              JOptionPane.showMessageDialog(null, message, "Unavailable extension", JOptionPane.ERROR_MESSAGE);
+              runExit();
+            }
+          }).start();
+        throw new RuntimeException(message);
+      }
+    }
+
+    // initalize texture combiners to compute:
+    // refraction*(1-fresnel) + reflection*fresnel
+    private void initCombiners(GL gl) {
+      gl.glCombinerParameteriNV(GL.GL_NUM_GENERAL_COMBINERS_NV, 1);
+      
+      // combiner 0
+      // a*b+c*d
+      gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_A_NV, GL.GL_TEXTURE0_ARB, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
+      gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_B_NV, GL.GL_PRIMARY_COLOR_NV, GL.GL_UNSIGNED_INVERT_NV, GL.GL_RGB);
+      gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_C_NV, GL.GL_TEXTURE1_ARB, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
+      gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_D_NV, GL.GL_PRIMARY_COLOR_NV, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
+
+      // output:
+      // (stage, portion, abOutput, cdOutput, sumOutput, scale, bias, abDotProduct, cdDotProduct, muxSum)
+      gl.glCombinerOutputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_DISCARD_NV, GL.GL_DISCARD_NV, GL.GL_SPARE0_NV, GL.GL_NONE, GL.GL_NONE, false, false, false);
+      
+      // final combiner
+      // output: Frgb = A*B + (1-A)*C + D
+      // (variable, input, mapping, componentUsage);
+      gl.glFinalCombinerInputNV(GL.GL_VARIABLE_A_NV, GL.GL_SPARE0_NV, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
+      gl.glFinalCombinerInputNV(GL.GL_VARIABLE_B_NV, GL.GL_ZERO, GL.GL_UNSIGNED_INVERT_NV, GL.GL_RGB);
+      gl.glFinalCombinerInputNV(GL.GL_VARIABLE_C_NV, GL.GL_ZERO, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
+      gl.glFinalCombinerInputNV(GL.GL_VARIABLE_D_NV, GL.GL_ZERO, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
+    }
+
+    private void initFragmentProgram(GL gl) {
+      int[] fragProgTmp = new int[1];
+      gl.glGenProgramsARB(1, fragProgTmp);
+      fragProg = fragProgTmp[0];
+      String combineFragProg =
+"!!ARBfp1.0\n" +
+"# compute refraction*(1-fresnel) + reflection*fresnel\n" +
+"TEMP texSamp0, texSamp1;\n" +
+"TEMP invFresnel;\n" +
+"PARAM one = { 1.0, 1.0, 1.0, 1.0 };\n" +
+"TEX texSamp0, fragment.texcoord[0], texture[0], CUBE;\n" +
+"TEX texSamp1, fragment.texcoord[1], texture[1], CUBE;\n" +
+"SUB invFresnel, one, fragment.color;\n" +
+"MUL texSamp0, texSamp0, invFresnel;\n" +
+"MUL texSamp1, texSamp1, fragment.color;\n" +
+"ADD texSamp0, texSamp0, texSamp1;\n" +
+"MOV result.color, texSamp0;\n" +
+"END";
+
+      gl.glBindProgramARB  (GL.GL_FRAGMENT_PROGRAM_ARB, fragProg);
+      gl.glProgramStringARB(GL.GL_FRAGMENT_PROGRAM_ARB, GL.GL_PROGRAM_FORMAT_ASCII_ARB,
+                            combineFragProg.length(), combineFragProg);
+      int[] errPos = new int[1];
+      gl.glGetIntegerv(GL.GL_PROGRAM_ERROR_POSITION_ARB, errPos);
+      if (errPos[0] >= 0) {
+        System.out.println("Fragment program failed to load:");
+        String errMsg = gl.glGetString(GL.GL_PROGRAM_ERROR_STRING_ARB);
+        if (errMsg == null) {
+          System.out.println("[No error message available]");
+        } else {
+          System.out.println("Error message: \"" + errMsg + "\"");
+        }
+        System.out.println("Error occurred at position " + errPos[0] + " in program:");
+        int endPos = errPos[0];
+        while (endPos < combineFragProg.length() && combineFragProg.charAt(endPos) != '\n') {
+          ++endPos;
+        }
+        System.out.println(combineFragProg.substring(errPos[0], endPos));
+      }
+    }
+
+    private void drawSkyBox(GL gl, GLU glu) {
+      // Compensates for ExaminerViewer's modification of modelview matrix
+      gl.glMatrixMode(GL.GL_MODELVIEW);
+      gl.glLoadIdentity();
+
+      gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB);
+      gl.glDisable(GL.GL_TEXTURE_CUBE_MAP_ARB);
+  
+      gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB);
+      gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP_ARB, cubemap);
+      gl.glEnable(GL.GL_TEXTURE_CUBE_MAP_ARB);
+
+      // This is a workaround for a driver bug on Mac OS X where the
+      // normals are not being sent down to the hardware in
+      // GL_NORMAL_MAP_EXT texgen mode. Temporarily enabling lighting
+      // causes the normals to be sent down. Thanks to Ken Dyke.
+      gl.glEnable(GL.GL_LIGHTING);
+
+      gl.glTexGeni(GL.GL_S, GL.GL_TEXTURE_GEN_MODE, GL.GL_NORMAL_MAP_EXT);
+      gl.glTexGeni(GL.GL_T, GL.GL_TEXTURE_GEN_MODE, GL.GL_NORMAL_MAP_EXT);
+      gl.glTexGeni(GL.GL_R, GL.GL_TEXTURE_GEN_MODE, GL.GL_NORMAL_MAP_EXT);
+
+      gl.glEnable(GL.GL_TEXTURE_GEN_S);
+      gl.glEnable(GL.GL_TEXTURE_GEN_T);
+      gl.glEnable(GL.GL_TEXTURE_GEN_R);
+
+      gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_REPLACE);
+
+      gl.glMatrixMode(GL.GL_TEXTURE);
+      gl.glPushMatrix();
+      gl.glLoadIdentity();
+      gl.glScalef(1.0f, -1.0f, 1.0f);
+      viewer.updateInverseRotation(gl);
+    
+      glut.glutSolidSphere(glu, 5.0, 40, 20);
+
+      gl.glDisable(GL.GL_LIGHTING);
+
+      gl.glPopMatrix();
+      gl.glMatrixMode(GL.GL_MODELVIEW);
+
+      gl.glDisable(GL.GL_TEXTURE_GEN_S);
+      gl.glDisable(GL.GL_TEXTURE_GEN_T);
+      gl.glDisable(GL.GL_TEXTURE_GEN_R);
+    }
+
+    private void drawObj(GL gl, GLU glu, int obj) {
+      switch(obj) {
+      case 0:
+        gl.glCallList(bunnydl);
+        break;
+    
+      case 1:
+        glut.glutSolidSphere(glu, 0.5, 64, 64);
+        break;
+
+      case 2:
+	glut.glutSolidTorus(gl, 0.25, 0.5, 64, 64);
+	break;
+
+      case 3:
+        drawPlane(gl, 1.0f, 1.0f, 50, 50);
+	break;
+      }
+    }
+
+    private void setRefraction(GL gl, float index) {
+      gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 4, index, index*index, 0.0f, 0.0f);
+    }
+
+    // draw square subdivided into quad strips
+    private void drawPlane(GL gl, float w, float h, int rows, int cols) {
+      int x, y;
+      float vx, vy, s, t;
+      float ts, tt, tw, th;
+
+      ts = 1.0f / cols;
+      tt = 1.0f / rows;
+
+      tw = w / cols;
+      th = h / rows;
+
+      gl.glNormal3f(0.0f, 0.0f, 1.0f);
+
+      for(y=0; y<rows; y++) {
+	gl.glBegin(GL.GL_QUAD_STRIP);
+	for(x=0; x<=cols; x++) {
+	  vx = tw * x -(w/2.0f);
+	  vy = th * y -(h/2.0f);
+	  s = ts * x;
+	  t = tt * y;
+
+	  gl.glTexCoord2f(s, t);
+	  gl.glColor3f(s, t, 0.0f);
+	  gl.glVertex3f(vx, vy, 0.0f);
+
+	  gl.glColor3f(s, t + tt, 0.0f);
+	  gl.glTexCoord2f(s, t + tt);
+	  gl.glVertex3f(vx, vy + th, 0.0f);
+	}
+	gl.glEnd();
+      }
+    }
+  }
+
+  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() {
+          animator.stop();
+          System.exit(0);
+        }
+      }).start();
+  }
+}