protected static X11GLXGraphicsConfiguration chooseGraphicsConfigurationStatic(
      Capabilities capabilities, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
    if (absScreen == null) {
      throw new IllegalArgumentException("AbstractGraphicsScreen is null");
    }
    if (!(absScreen instanceof X11GraphicsScreen)) {
      throw new IllegalArgumentException("Only X11GraphicsScreen are allowed here");
    }
    X11GraphicsScreen x11Screen = (X11GraphicsScreen) absScreen;

    if (capabilities != null && !(capabilities instanceof GLCapabilities)) {
      throw new IllegalArgumentException(
          "This NativeWindowFactory accepts only GLCapabilities objects");
    }

    if (chooser != null && !(chooser instanceof GLCapabilitiesChooser)) {
      throw new IllegalArgumentException(
          "This NativeWindowFactory accepts only GLCapabilitiesChooser objects");
    }

    if (capabilities == null) {
      capabilities = new GLCapabilities(null);
    }

    boolean onscreen = capabilities.isOnscreen();
    boolean usePBuffer = ((GLCapabilities) capabilities).isPBuffer();

    GLCapabilities caps2 = (GLCapabilities) capabilities.clone();
    if (!caps2.isOnscreen()) {
      // OFFSCREEN !DOUBLE_BUFFER // FIXME DBLBUFOFFSCRN
      caps2.setDoubleBuffered(false);
    }

    X11GLXGraphicsConfiguration res;
    res =
        chooseGraphicsConfigurationFBConfig(
            (GLCapabilities) caps2, (GLCapabilitiesChooser) chooser, x11Screen);
    if (null == res) {
      if (usePBuffer) {
        throw new GLException(
            "Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig");
      }
      res =
          chooseGraphicsConfigurationXVisual(
              (GLCapabilities) caps2, (GLCapabilitiesChooser) chooser, x11Screen);
    }
    if (null == res) {
      throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration");
    }
    if (DEBUG) {
      System.err.println(
          "X11GLXGraphicsConfiguration.chooseGraphicsConfigurationStatic("
              + x11Screen
              + ","
              + caps2
              + "): "
              + res);
    }
    return res;
  }
Example #2
0
 public static GLCapabilities fixCaps(
     GLCapabilities caps, boolean onscreen, boolean pbuffer, boolean undecorated) {
   GLCapabilities caps2 = (GLCapabilities) caps.clone();
   caps2.setOnscreen(onscreen);
   caps2.setPBuffer(!onscreen && pbuffer);
   caps2.setDoubleBuffered(!onscreen);
   return caps2;
 }
Example #3
0
 @Override
 protected GLCanvas createDrawable() {
   GLCapabilities caps = new GLCapabilities(null);
   caps.setSampleBuffers(true);
   //
   GLCanvas panel = new GLCanvas(caps);
   panel.addGLEventListener(this);
   panel.addKeyListener(this);
   return panel;
 }
Example #4
0
 @Override
 protected GLJPanel createDrawable() {
   GLCapabilities caps = new GLCapabilities(null);
   caps.setSampleBuffers(true); // enable sample buffers for aliasing
   caps.setNumSamples(2);
   //
   GLJPanel panel = new GLJPanel(caps);
   panel.addGLEventListener(this);
   panel.addKeyListener(this);
   return panel;
 }
 GLFrame(JTextArea outputArea) {
   this.outputArea = outputArea;
   GLCapabilities caps = new GLCapabilities(Configuration.getMaxCompatibleGLProfile());
   caps.setAlphaBits(8);
   caps.setRedBits(8);
   caps.setGreenBits(8);
   caps.setBlueBits(8);
   GLCanvas glCanvas = new GLCanvas(caps);
   glCanvas.addGLEventListener(this);
   this.add(glCanvas);
   this.setSize(200, 200);
 }
Example #6
0
  public DrawByLevelFractal() {
    baseDir = "CS371/assignments/assignment02/ifs/";

    ifsFiles = new ArrayList<String>();
    ifsFiles.add("carpet.ifs");
    ifsFiles.add("chaos.ifs");
    ifsFiles.add("coral.ifs");
    ifsFiles.add("curl.ifs");
    ifsFiles.add("four.ifs");
    ifsFiles.add("galaxy.ifs");
    ifsFiles.add("dragon.ifs");
    ifsFiles.add("leady.ifs");
    ifsFiles.add("koch.ifs");
    ifsFiles.add("mouse.ifs");
    ifsFiles.add("leaf.ifs");
    ifsFiles.add("seven.ifs");
    ifsFiles.add("three.ifs");
    ifsFiles.add("tri.ifs");

    pointsToDraw = 80000;
    left = -7;
    right = 7;
    bottom = -7;
    top = 11;
    xOrigin = 0;
    yOrigin = 0;

    rotate_scale_xx = new double[maximumTransitions];
    rotate_scale_xy = new double[maximumTransitions];
    rotate_scale_yx = new double[maximumTransitions];
    rotate_scale_yy = new double[maximumTransitions];
    trans_x = new double[maximumTransitions];
    trans_y = new double[maximumTransitions];
    prob = new double[maximumTransitions];

    caps = new GLCapabilities(GLProfile.getGL2GL3());
    caps.setDoubleBuffered(true); // request double buffer display mode
    caps.setHardwareAccelerated(true);
    canvas = new GLJPanel();
    // canvas.setOpaque(true);
    canvas.addGLEventListener(this);
    canvas.addKeyListener(this);
    animator = new FPSAnimator(canvas, 60);

    getContentPane().add(canvas);
  }
Example #7
0
  public static void main(String[] args) {
    GLCapabilities caps = new GLCapabilities(null);
    caps.setSampleBuffers(true); // enable sample buffers for aliasing
    caps.setNumSamples(2);

    varray demo = new varray();

    JFrame.setDefaultLookAndFeelDecorated(true);
    JFrame frame = new JFrame("varray");
    frame.setSize(512, 256);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.getContentPane().add(demo.drawable);
    frame.setVisible(true);
    demo.drawable.requestFocusInWindow();
  }
Example #8
0
  private void run(int type, PerfModule pm) {
    int width = 800;
    int height = 480;
    pmod = pm;
    System.err.println("Perftst.run()");
    try {
      GLCapabilities caps = new GLCapabilities(GLProfile.getGL2ES2());
      // For emulation library, use 16 bpp
      caps.setRedBits(5);
      caps.setGreenBits(6);
      caps.setBlueBits(5);
      caps.setDepthBits(16);

      Window nWindow = null;
      if (0 != (type & USE_AWT)) {
        Display nDisplay =
            NewtFactory.createDisplay(NativeWindowFactory.TYPE_AWT, null); // local display
        Screen nScreen =
            NewtFactory.createScreen(NativeWindowFactory.TYPE_AWT, nDisplay, 0); // screen 0
        nWindow = NewtFactory.createWindow(NativeWindowFactory.TYPE_AWT, nScreen, caps);
        window = GLWindow.create(nWindow);
      } else {
        window = GLWindow.create(caps);
      }

      window.addMouseListener(this);
      window.addGLEventListener(this);
      // window.setEventHandlerMode(GLWindow.EVENT_HANDLER_GL_CURRENT); // default
      // window.setEventHandlerMode(GLWindow.EVENT_HANDLER_GL_NONE); // no current ..

      // Size OpenGL to Video Surface
      window.setSize(width, height);
      window.setFullscreen(true);
      window.setVisible(true);

      window.display();

      // Shut things down cooperatively
      window.destroy();
      window.getFactory().shutdown();
      System.out.println("Perftst shut down cleanly.");
    } catch (Throwable t) {
      t.printStackTrace();
    }
  }
Example #9
0
 private static GLCapabilities stdcaps() {
   GLProfile prof = GLProfile.getDefault();
   GLCapabilities cap = new GLCapabilities(prof);
   cap.setDoubleBuffered(true);
   cap.setAlphaBits(8);
   cap.setRedBits(8);
   cap.setGreenBits(8);
   cap.setBlueBits(8);
   cap.setSampleBuffers(true);
   cap.setNumSamples(4);
   return (cap);
 }
Example #10
0
 public GLPbufferImpl(GLDrawableImpl pbufferDrawable, GLContext parentContext) {
   GLCapabilities caps =
       (GLCapabilities)
           pbufferDrawable
               .getNativeWindow()
               .getGraphicsConfiguration()
               .getNativeGraphicsConfiguration()
               .getChosenCapabilities();
   if (caps.isOnscreen()) {
     if (caps.isPBuffer()) {
       throw new IllegalArgumentException(
           "Error: Given drawable is Onscreen and Pbuffer: " + pbufferDrawable);
     }
     throw new IllegalArgumentException("Error: Given drawable is Onscreen: " + pbufferDrawable);
   } else {
     if (!caps.isPBuffer()) {
       throw new IllegalArgumentException(
           "Error: Given drawable is not Pbuffer: " + pbufferDrawable);
     }
   }
   this.pbufferDrawable = pbufferDrawable;
   context = (GLContextImpl) pbufferDrawable.createContext(parentContext);
   context.setSynchronized(true);
 }
  protected static X11GLXGraphicsConfiguration chooseGraphicsConfigurationXVisual(
      GLCapabilities capabilities, GLCapabilitiesChooser chooser, X11GraphicsScreen x11Screen) {
    if (chooser == null) {
      chooser = new DefaultGLCapabilitiesChooser();
    }

    // Until we have a rock-solid visual selection algorithm written
    // in pure Java, we're going to provide the underlying window
    // system's selection to the chooser as a hint

    GLProfile glProfile = capabilities.getGLProfile();
    boolean onscreen = capabilities.isOnscreen();
    GLCapabilities[] caps = null;
    int recommendedIndex = -1;
    XVisualInfo retXVisualInfo = null;
    int chosen = -1;

    AbstractGraphicsDevice absDevice = x11Screen.getDevice();
    long display = absDevice.getHandle();
    try {
      NativeWindowFactory.getDefaultFactory().getToolkitLock().lock();
      X11Lib.XLockDisplay(display);
      int screen = x11Screen.getIndex();
      boolean isMultisampleAvailable = GLXUtil.isMultisampleAvailable(display);
      int[] attribs =
          X11GLXGraphicsConfiguration.GLCapabilities2AttribList(
              capabilities, false, isMultisampleAvailable, display, screen);
      XVisualInfo[] infos = null;

      XVisualInfo recommendedVis = GLX.glXChooseVisualCopied(display, screen, attribs, 0);
      if (DEBUG) {
        System.err.print("!!! glXChooseVisual recommended ");
        if (recommendedVis == null) {
          System.err.println("null visual");
        } else {
          System.err.println("visual id 0x" + Long.toHexString(recommendedVis.getVisualid()));
        }
      }
      int[] count = new int[1];
      XVisualInfo template = XVisualInfo.create();
      template.setScreen(screen);
      infos = X11Lib.XGetVisualInfoCopied(display, X11Lib.VisualScreenMask, template, count, 0);
      if (infos == null || infos.length < 1) {
        throw new GLException("Error while enumerating available XVisualInfos");
      }
      caps = new GLCapabilities[infos.length];
      for (int i = 0; i < infos.length; i++) {
        caps[i] =
            X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(
                glProfile, display, infos[i], onscreen, false, isMultisampleAvailable);
        // Attempt to find the visual chosen by glXChooseVisual
        if (recommendedVis != null && recommendedVis.getVisualid() == infos[i].getVisualid()) {
          recommendedIndex = i;
        }
      }
      try {
        chosen = chooser.chooseCapabilities(capabilities, caps, recommendedIndex);
      } catch (NativeWindowException e) {
        if (DEBUG) {
          e.printStackTrace();
        }
        chosen = -1;
      }
      if (chosen < 0) {
        // keep on going ..
        if (DEBUG) {
          System.err.println(
              "X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual Failed .. unable to choose config, using first");
        }
        chosen = 0; // default ..
      } else if (chosen >= caps.length) {
        throw new GLException(
            "GLCapabilitiesChooser specified invalid index (expected 0.."
                + (caps.length - 1)
                + ")");
      }
      if (infos[chosen] == null) {
        throw new GLException("GLCapabilitiesChooser chose an invalid visual");
      }
      retXVisualInfo = XVisualInfo.create(infos[chosen]);
    } finally {
      X11Lib.XUnlockDisplay(display);
      NativeWindowFactory.getDefaultFactory().getToolkitLock().unlock();
    }
    return new X11GLXGraphicsConfiguration(
        x11Screen, caps[chosen], capabilities, chooser, retXVisualInfo, 0, -1);
  }
  protected static X11GLXGraphicsConfiguration chooseGraphicsConfigurationFBConfig(
      GLCapabilities capabilities, GLCapabilitiesChooser chooser, X11GraphicsScreen x11Screen) {
    int recommendedIndex = -1;
    GLCapabilities[] caps = null;
    PointerBuffer fbcfgsL = null;
    int chosen = -1;
    int retFBID = -1;
    XVisualInfo retXVisualInfo = null;
    GLProfile glProfile = capabilities.getGLProfile();
    boolean onscreen = capabilities.isOnscreen();
    boolean usePBuffer = capabilities.isPBuffer();

    // Utilizing FBConfig
    //
    AbstractGraphicsDevice absDevice = x11Screen.getDevice();
    long display = absDevice.getHandle();
    try {
      NativeWindowFactory.getDefaultFactory().getToolkitLock().lock();
      X11Lib.XLockDisplay(display);
      int screen = x11Screen.getIndex();
      boolean isMultisampleAvailable = GLXUtil.isMultisampleAvailable(display);
      int[] attribs =
          X11GLXGraphicsConfiguration.GLCapabilities2AttribList(
              capabilities, true, isMultisampleAvailable, display, screen);
      int[] count = {-1};

      fbcfgsL = GLX.glXChooseFBConfigCopied(display, screen, attribs, 0, count, 0);
      if (fbcfgsL == null || fbcfgsL.limit() < 1) {
        if (DEBUG) {
          System.err.println(
              "X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: Failed glXChooseFBConfig ("
                  + x11Screen
                  + ","
                  + capabilities
                  + "): "
                  + fbcfgsL
                  + ", "
                  + count[0]);
        }
        return null;
      }
      if (!X11GLXGraphicsConfiguration.GLXFBConfigValid(display, fbcfgsL.get(0))) {
        if (DEBUG) {
          System.err.println(
              "X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: Failed - GLX FBConfig invalid: ("
                  + x11Screen
                  + ","
                  + capabilities
                  + "): "
                  + fbcfgsL
                  + ", fbcfg: 0x"
                  + Long.toHexString(fbcfgsL.get(0)));
        }
        return null;
      }
      recommendedIndex = 0; // 1st match is always recommended ..
      caps = new GLCapabilities[fbcfgsL.limit()];
      for (int i = 0; i < fbcfgsL.limit(); i++) {
        caps[i] =
            X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(
                glProfile,
                display,
                fbcfgsL.get(i),
                false,
                onscreen,
                usePBuffer,
                isMultisampleAvailable);
      }

      if (null == chooser) {
        chosen = recommendedIndex;
      } else {
        try {
          chosen = chooser.chooseCapabilities(capabilities, caps, recommendedIndex);
        } catch (NativeWindowException e) {
          if (DEBUG) {
            e.printStackTrace();
          }
          chosen = -1;
        }
      }
      if (chosen < 0) {
        // keep on going ..
        if (DEBUG) {
          System.err.println(
              "X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig Failed .. unable to choose config, using first");
        }
        chosen = 0; // default ..
      } else if (chosen >= caps.length) {
        throw new GLException(
            "GLCapabilitiesChooser specified invalid index (expected 0.."
                + (caps.length - 1)
                + ")");
      }

      retFBID = X11GLXGraphicsConfiguration.glXFBConfig2FBConfigID(display, fbcfgsL.get(chosen));

      retXVisualInfo = GLX.glXGetVisualFromFBConfigCopied(display, fbcfgsL.get(chosen));
      if (retXVisualInfo == null) {
        if (DEBUG) {
          System.err.println(
              "X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: Failed glXGetVisualFromFBConfig ("
                  + x11Screen
                  + ", "
                  + fbcfgsL.get(chosen)
                  + " (Continue: "
                  + (false == caps[chosen].isOnscreen())
                  + "):\n\t"
                  + caps[chosen]);
        }
        if (caps[chosen].isOnscreen()) {
          // Onscreen drawables shall have a XVisual ..
          return null;
        }
      }
    } finally {
      X11Lib.XUnlockDisplay(display);
      NativeWindowFactory.getDefaultFactory().getToolkitLock().unlock();
    }

    return new X11GLXGraphicsConfiguration(
        x11Screen,
        caps[chosen],
        capabilities,
        chooser,
        retXVisualInfo,
        fbcfgsL.get(chosen),
        retFBID);
  }
Example #13
0
  /**
   * Creates and initializes an appropriate OpenGl Context (NS). Should only be called by {@link
   * makeCurrentImpl()}.
   */
  protected boolean create(boolean pbuffer, boolean floatingPoint) {
    MacOSXCGLContext other = (MacOSXCGLContext) GLContextShareSet.getShareContext(this);
    long share = 0;
    if (other != null) {
      if (!other.isNSContext()) {
        throw new GLException("GLContextShareSet is not a NS Context");
      }
      share = other.getHandle();
      if (share == 0) {
        throw new GLException("GLContextShareSet returned a NULL OpenGL context");
      }
    }
    MacOSXCGLGraphicsConfiguration config =
        (MacOSXCGLGraphicsConfiguration)
            drawable.getNativeSurface().getGraphicsConfiguration().getNativeGraphicsConfiguration();
    GLCapabilitiesImmutable capabilitiesRequested =
        (GLCapabilitiesImmutable) config.getRequestedCapabilities();
    GLProfile glProfile = capabilitiesRequested.getGLProfile();
    if (glProfile.isGL3()) {
      throw new GLException(
          "GL3 profile currently not supported on MacOSX, due to the lack of a OpenGL 3.1 implementation");
    }
    // HACK .. bring in OnScreen/PBuffer selection to the DrawableFactory !!
    GLCapabilities capabilities = (GLCapabilities) capabilitiesRequested.cloneMutable();
    capabilities.setPBuffer(pbuffer);
    capabilities.setPbufferFloatingPointBuffers(floatingPoint);

    long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(capabilities);
    if (pixelFormat == 0) {
      throw new GLException("Unable to allocate pixel format with requested GLCapabilities");
    }
    config.setChosenPixelFormat(pixelFormat);
    try {
      int[] viewNotReady = new int[1];
      // Try to allocate a context with this
      contextHandle = CGL.createContext(share, drawable.getHandle(), pixelFormat, viewNotReady, 0);
      if (contextHandle == 0) {
        if (viewNotReady[0] == 1) {
          if (DEBUG) {
            System.err.println("!!! View not ready for " + getClass().getName());
          }
          // View not ready at the window system level -- this is OK
          return false;
        }
        throw new GLException("Error creating NSOpenGLContext with requested pixel format");
      }

      if (!pbuffer && !capabilities.isBackgroundOpaque()) {
        // Set the context opacity
        CGL.setContextOpacity(contextHandle, 0);
      }

      GLCapabilitiesImmutable caps =
          MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(glProfile, pixelFormat);
      config.setChosenCapabilities(caps);
    } finally {
      CGL.deletePixelFormat(pixelFormat);
    }
    if (!CGL.makeCurrentContext(contextHandle)) {
      throw new GLException("Error making Context (NS) current");
    }
    isNSContext = true;
    setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT | CTX_OPTION_ANY);
    GLContextShareSet.contextCreated(this);
    return true;
  }
  public int chooseCapabilities(
      Capabilities desired, Capabilities[] available, int windowSystemRecommendedChoice) {
    GLCapabilities _desired = (GLCapabilities) desired;
    GLCapabilities[] _available = (GLCapabilities[]) available;

    if (DEBUG) {
      System.err.println("Desired: " + _desired);
      for (int i = 0; i < _available.length; i++) {
        System.err.println("Available " + i + ": " + _available[i]);
      }
      System.err.println("Window system's recommended choice: " + windowSystemRecommendedChoice);
    }

    if (windowSystemRecommendedChoice >= 0
        && windowSystemRecommendedChoice < _available.length
        && _available[windowSystemRecommendedChoice] != null) {
      if (DEBUG) {
        System.err.println(
            "Choosing window system's recommended choice of " + windowSystemRecommendedChoice);
        System.err.println(_available[windowSystemRecommendedChoice]);
      }
      return windowSystemRecommendedChoice;
    }

    // Create score array
    int[] scores = new int[_available.length];
    int NO_SCORE = -9999999;
    int DOUBLE_BUFFER_MISMATCH_PENALTY = 1000;
    int STENCIL_MISMATCH_PENALTY = 500;
    // Pseudo attempt to keep equal rank penalties scale-equivalent
    // (e.g., stencil mismatch is 3 * accum because there are 3 accum
    // components)
    int COLOR_MISMATCH_PENALTY_SCALE = 36;
    int DEPTH_MISMATCH_PENALTY_SCALE = 6;
    int ACCUM_MISMATCH_PENALTY_SCALE = 1;
    int STENCIL_MISMATCH_PENALTY_SCALE = 3;
    for (int i = 0; i < scores.length; i++) {
      scores[i] = NO_SCORE;
    }
    // Compute score for each
    for (int i = 0; i < scores.length; i++) {
      GLCapabilities cur = _available[i];
      if (cur == null) {
        continue;
      }
      if (_desired.isOnscreen() != cur.isOnscreen()) {
        continue;
      }
      if (_desired.getStereo() != cur.getStereo()) {
        continue;
      }
      int score = 0;
      // Compute difference in color depth
      // (Note that this decides the direction of all other penalties)
      score +=
          (COLOR_MISMATCH_PENALTY_SCALE
              * ((cur.getRedBits() + cur.getGreenBits() + cur.getBlueBits() + cur.getAlphaBits())
                  - (_desired.getRedBits()
                      + _desired.getGreenBits()
                      + _desired.getBlueBits()
                      + _desired.getAlphaBits())));
      // Compute difference in depth buffer depth
      score +=
          (DEPTH_MISMATCH_PENALTY_SCALE
              * sign(score)
              * Math.abs(cur.getDepthBits() - _desired.getDepthBits()));
      // Compute difference in accumulation buffer depth
      score +=
          (ACCUM_MISMATCH_PENALTY_SCALE
              * sign(score)
              * Math.abs(
                  (cur.getAccumRedBits()
                          + cur.getAccumGreenBits()
                          + cur.getAccumBlueBits()
                          + cur.getAccumAlphaBits())
                      - (_desired.getAccumRedBits()
                          + _desired.getAccumGreenBits()
                          + _desired.getAccumBlueBits()
                          + _desired.getAccumAlphaBits())));
      // Compute difference in stencil bits
      score +=
          STENCIL_MISMATCH_PENALTY_SCALE
              * sign(score)
              * (cur.getStencilBits() - _desired.getStencilBits());
      if (cur.getDoubleBuffered() != _desired.getDoubleBuffered()) {
        score += sign(score) * DOUBLE_BUFFER_MISMATCH_PENALTY;
      }
      if ((_desired.getStencilBits() > 0) && (cur.getStencilBits() == 0)) {
        score += sign(score) * STENCIL_MISMATCH_PENALTY;
      }
      scores[i] = score;
    }
    // Now prefer hardware-accelerated visuals by pushing scores of
    // non-hardware-accelerated visuals out
    boolean gotHW = false;
    int maxAbsoluteHWScore = 0;
    for (int i = 0; i < scores.length; i++) {
      int score = scores[i];
      if (score == NO_SCORE) {
        continue;
      }
      GLCapabilities cur = _available[i];
      if (cur.getHardwareAccelerated()) {
        int absScore = Math.abs(score);
        if (!gotHW || (absScore > maxAbsoluteHWScore)) {
          gotHW = true;
          maxAbsoluteHWScore = absScore;
        }
      }
    }
    if (gotHW) {
      for (int i = 0; i < scores.length; i++) {
        int score = scores[i];
        if (score == NO_SCORE) {
          continue;
        }
        GLCapabilities cur = _available[i];
        if (!cur.getHardwareAccelerated()) {
          if (score <= 0) {
            score -= maxAbsoluteHWScore;
          } else if (score > 0) {
            score += maxAbsoluteHWScore;
          }
          scores[i] = score;
        }
      }
    }

    if (DEBUG) {
      System.err.print("Scores: [");
      for (int i = 0; i < _available.length; i++) {
        if (i > 0) {
          System.err.print(",");
        }
        System.err.print(" " + scores[i]);
      }
      System.err.println(" ]");
    }

    // Ready to select. Choose score closest to 0.
    int scoreClosestToZero = NO_SCORE;
    int chosenIndex = -1;
    for (int i = 0; i < scores.length; i++) {
      int score = scores[i];
      if (score == NO_SCORE) {
        continue;
      }
      // Don't substitute a positive score for a smaller negative score
      if ((scoreClosestToZero == NO_SCORE)
          || (Math.abs(score) < Math.abs(scoreClosestToZero)
              && ((sign(scoreClosestToZero) < 0) || (sign(score) > 0)))) {
        scoreClosestToZero = score;
        chosenIndex = i;
      }
    }
    if (chosenIndex < 0) {
      throw new NativeWindowException("Unable to select one of the provided GLCapabilities");
    }
    if (DEBUG) {
      System.err.println("Chosen index: " + chosenIndex);
      System.err.println("Chosen capabilities:");
      System.err.println(_available[chosenIndex]);
    }

    return chosenIndex;
  }