@Test
  @Ignore
public void testTransparencySettings() throws Exception {

    
    final AbstractGridFormat format = new GeoTiffFormat();
    File file = TestData.file(GeoTiffReaderTest.class,"002025_0100_010722_l7_01_utm2.tiff");        
    if (format.accepts(file)) {
        // getting a reader
        GeoTiffReader reader = new GeoTiffReader(file, new Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
        if (reader != null) {
            // reading the coverage
            GridCoverage2D coverage = reader.read(null);
            assertNotNull(coverage);
            assertTrue(coverage.getRenderedImage().getSampleModel().getNumBands() == 1);
            final ParameterValue<Color> colorPV = AbstractGridFormat.INPUT_TRANSPARENT_COLOR.createValue();
            colorPV.setValue(Color.BLACK);
            coverage = reader.read(new GeneralParameterValue[] { colorPV });
            assertNotNull(coverage);
            assertTrue(coverage.getRenderedImage().getSampleModel().getNumBands() == 2);
            // showing it
            if (TestData.isInteractiveTest())
                coverage.show();
            else
                PlanarImage.wrapRenderedImage(coverage.getRenderedImage()).getTiles();
        }
    } else
        assertFalse(true); // we should not get here
    
    file = TestData.file(GeoTiffReaderTest.class,"gaarc_subset.tiff");        
    if (format.accepts(file)) {
        // getting a reader
        GeoTiffReader reader = new GeoTiffReader(file, new Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
        if (reader != null) {
            // reading the coverage
            GridCoverage2D coverage = reader.read(null);
            assertNotNull(coverage);
            assertTrue(coverage.getRenderedImage().getSampleModel().getNumBands() == 3);
            final ParameterValue<Color> colorPV = AbstractGridFormat.INPUT_TRANSPARENT_COLOR.createValue();
            colorPV.setValue(new Color(34,53,87));
            coverage = reader.read(new GeneralParameterValue[] { colorPV });
            assertNotNull(coverage);
            assertTrue(coverage.getRenderedImage().getSampleModel().getNumBands() == 4);
            // showing it
            if (TestData.isInteractiveTest())
                coverage.show();
            else
                PlanarImage.wrapRenderedImage(coverage.getRenderedImage()).getTiles();
        }
    } else
        assertFalse(true); // we should not get here
    
    // now we test that we cannot do colormasking on a non-rendered output
    file = TestData.file(GeoTiffReaderTest.class,"wind.tiff");        
    if (format.accepts(file)) {
        // getting a reader
        GeoTiffReader reader = new GeoTiffReader(file, new Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
        if (reader != null) {
            // reading the coverage
            GridCoverage2D coverage = reader.read(null);
            assertNotNull(coverage);
            assertTrue(coverage.getRenderedImage().getSampleModel().getNumBands() == 2);
            final ParameterValue<Color> colorPV = AbstractGridFormat.INPUT_TRANSPARENT_COLOR.createValue();
            colorPV.setValue(new Color(34,53,87));
            try{
                coverage = reader.read(new GeneralParameterValue[] { colorPV });
                assertFalse(true); // we should not get here
            } catch (Exception e) {
                // TODO: handle exception
            }
        }
    } 
        
}