How to use

getPixelsPerMM

method

in

com.jogamp.newt.MonitorDevice

/**
 * Returns the <i>pixels per millimeter</i> value according to the <i>current</i> {@link MonitorMode mode}'s
 * {@link SurfaceSize#getResolution() surface resolution}.
 * <p>
 * To convert the result to <i>dpi</i>, i.e. dots-per-inch, multiply both components with <code>25.4f</code>.
 * </p>
 * @param ppmmStore float[2] storage for the ppmm result
 * @return the passed storage containing the ppmm for chaining
 */
public final float[] getPixelsPerMM(final float[] ppmmStore) {
  return getPixelsPerMM(getCurrentMode(), ppmmStore);
}

@Override
public final float[] getPixelsPerMM(final float[] ppmmStore) {
  getMainMonitor().getPixelsPerMM(ppmmStore);
  ppmmStore[0] *= (float)hasPixelScale[0] / (float)nativePixelScale[0];
  ppmmStore[1] *= (float)hasPixelScale[1] / (float)nativePixelScale[1];
  return ppmmStore;
}

/**
 * Returns the <i>pixels per millimeter</i> value according to the <i>current</i> {@link MonitorMode mode}'s
 * {@link SurfaceSize#getResolution() surface resolution}.
 * <p>
 * To convert the result to <i>dpi</i>, i.e. dots-per-inch, multiply both components with <code>25.4f</code>.
 * </p>
 * @param ppmmStore float[2] storage for the ppmm result
 * @return the passed storage containing the ppmm for chaining
 */
public final float[] getPixelsPerMM(final float[] ppmmStore) {
  return getPixelsPerMM(getCurrentMode(), ppmmStore);
}

@Override
public final float[] getPixelsPerMM(final float[] ppmmStore) {
  getMainMonitor().getPixelsPerMM(ppmmStore);
  ppmmStore[0] *= hasPixelScale[0] / maxPixelScale[0];
  ppmmStore[1] *= hasPixelScale[1] / maxPixelScale[1];
  return ppmmStore;
}

@Override
public void init(final GLAutoDrawable drawable) {
  final MonitorDevice monitor = glWindow.getMainMonitor();
  System.err.println("Main Monitor: "+monitor);
  final float[] pixelPerMM = monitor.getPixelsPerMM(new float[2]);
  System.err.println("    pixel/mm ["+pixelPerMM[0]+", "+pixelPerMM[1]+"]");
  System.err.println("    pixel/in ["+pixelPerMM[0]*25.4f+", "+pixelPerMM[1]*25.4f+"]");
  final GL gl = drawable.getGL();
  System.err.println(JoglVersion.getGLInfo(gl, null));
  System.err.println("Requested: "+drawable.getNativeSurface().getGraphicsConfiguration().getRequestedCapabilities());
  System.err.println("Chosen   : "+drawable.getChosenGLCapabilities());
  System.err.println("GL impl. class "+gl.getClass().getName());
  if( gl.isGL4ES3() ) {
    final GL4ES3 _gl = gl.getGL4ES3();
    System.err.println("GL4ES3 retrieved, impl. class "+_gl.getClass().getName());
  }
  if( gl.isGL3() ) {
    final GL3 _gl = gl.getGL3();
    System.err.println("GL3 retrieved, impl. class "+_gl.getClass().getName());
  }
  if( gl.isGLES3() ) {
    final GLES3 _gl = gl.getGLES3();
    System.err.println("GLES3 retrieved, impl. class "+_gl.getClass().getName());
  }
  if( gl.isGLES2() ) {
    final GLES2 _gl = gl.getGLES2();
    System.err.println("GLES2 retrieved, impl. class "+_gl.getClass().getName());
  }
}