* It is worth to point out that when constructing a {@link MapContext} it
* is crucia to feed it with the {@link AbstractGridCoverage2DReader}
* created for the various formats instead of with the
* {@link GridCoverage2D} directly since the reader will allow the renderer
* to leverage, when present, internal overviews or, when absent, decimation
* on reading which allows to perform nearest neighbor susampling directly
* on reading.
*
* @throws TransformException
* @throws FactoryException
* @throws IOException
*/
public TestTiffs(final String file) throws TransformException,
FactoryException, IOException {
// /////////////////////////////////////////////////////////////////////
//
// Create frame and the like
//
// /////////////////////////////////////////////////////////////////////
frame = new JFrame("Test");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
Container content = frame.getContentPane();
mp = new JMapPane();
// mp.addZoomChangeListener(this);
content.setLayout(new BorderLayout());
jtb = new JToolBar();
Action zoomIn = new ZoomInAction(mp);
Action zoomOut = new ZoomOutAction(mp);
Action pan = new PanAction(mp);
Action select = new SelectAction(mp);
Action reset = new ResetAction(mp);
jtb.add(zoomIn);
jtb.add(zoomOut);
jtb.add(pan);
jtb.addSeparator();
jtb.add(reset);
jtb.addSeparator();
jtb.add(select);
content.add(jtb, BorderLayout.NORTH);
// /////////////////////////////////////////////////////////////////////
//
// Load data and set the relevant parameters
//
// /////////////////////////////////////////////////////////////////////
if (Boolean.getBoolean("org.geotools.test.geotiff"))
loadImageFile(file, true);
else
loadImageFile(file, true);
// /////////////////////////////////////////////////////////////////////
//
// Creating renderer and setting the context
//
// /////////////////////////////////////////////////////////////////////
GTRenderer renderer = new StreamingRenderer();
// //
//
// Setting multiple rendering hints to speed drawing this map up.
//
// This map is binary hence we need to turn off all the Java2D
// antialising and dithering to make it more sharper and faster.
//
// //
RenderingHints jhints = new RenderingHints(JAI.KEY_INTERPOLATION,
new InterpolationNearest());
jhints.add(new RenderingHints(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_OFF));
jhints.add(new RenderingHints(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_SPEED));
jhints.add(new RenderingHints(RenderingHints.KEY_COLOR_RENDERING,
RenderingHints.VALUE_COLOR_RENDER_SPEED));
jhints.add(new RenderingHints(RenderingHints.KEY_DITHERING,
RenderingHints.VALUE_DITHER_DISABLE));
renderer.setJava2DHints(jhints);
mp.setRenderer(renderer);
mp.setContext(map);
// /////////////////////////////////////////////////////////////////////
//
// Paint me
//
// /////////////////////////////////////////////////////////////////////
mp.setBackground(Color.WHITE);
content.add(mp, BorderLayout.CENTER);
frame.pack();
frame.setSize(800, 600);
frame.setVisible(true);
}
/**
* Loads the reader (an subclass of {@link AbstractGridCoverage2DReader} for
* the provided imagePath. If the parameter geotiff is true
* we load it as a geotiff otherwise as a world image (which means using the
* world and prj file).
*
*
* IMPORTANT It is crucial to pass the * {@link AbstractGridCoverage2DReader} subclass to the the * {@link MapContext} in order to allow the {@link StreamingRenderer} to * leverage on overviews and tiling fr multiple subsequent requests. * *
* If we simply pass the {@link GridCoverage2D} created using the reader * without supplying any parameter to the * {@link GridCoverageReader#read(org.opengis.parameter.GeneralParameterValue[])} * method we will ALWAYS use the highest resolution coverage without having * overviews kicking in. * * @param imagePath * tells where to file to load is. * @param geotiff * tells if the file is a geotiff or not. * @throws TransformException * @throws FactoryException * @throws DataSourceException */ private void loadImageFile(final String imagePath, final boolean geotiff) throws TransformException, FactoryException, DataSourceException { // load me simply using the reader File tiffFile = new File(imagePath); AbstractGridCoverage2DReader rdr = null; if (geotiff) rdr = new GeoTiffReader(tiffFile); else rdr = new WorldImageReader(tiffFile); assert rdr != null; crs = rdr.getCrs(); dataEnvelope = new ReferencedEnvelope(rdr.getOriginalEnvelope(), crs); // between 0 and 255. StyleBuilder sb = new StyleBuilder(); RasterSymbolizer rsDem = sb.createRasterSymbolizer(); org.geotools.styling.Style demStyle = sb.createStyle(rsDem); // map map = new DefaultMapContext(crs); map.addLayer(rdr, demStyle); map.setCoordinateReferenceSystem(crs); map.setAreaOfInterest(dataEnvelope); mp.setMapArea(dataEnvelope); } /** * @param args */ public static void main(String[] args) throws Exception { // ///////////////////////////////////////////////////////////////////// // // Parsing input arguments // // ///////////////////////////////////////////////////////////////////// final Arguments arguments = new Arguments(args); String pathToFile; try { pathToFile = arguments.getRequiredString("path"); } catch (IllegalArgumentException e) { pathToFile = null; } if (pathToFile == null | pathToFile.equalsIgnoreCase("")) { System.out.println("Wrong path to file provided."); System.exit(1); } // ///////////////////////////////////////////////////////////////////// // // Instantiating // // ///////////////////////////////////////////////////////////////////// JAI.getDefaultInstance().getTileCache().setMemoryCapacity( 80 * 1024 * 1024); // final TCTool tool= new TCTool(); TestTiffs mV = new TestTiffs(pathToFile); } }