I append the full source code[1] but the painting part is:
private class PanelMap extends JPanel {
@Override
public void paint(Graphics g) {
try {
Graphics2D g2d = (Graphics2D) g;
Rectangle rectangle = new Rectangle(getSize());
//System.out.println("Map size (px): "+ rectangle.height
+ "x" + rectangle.width);
renderer.paint(g2d, rectangle,
mapContext.getLayerBounds());
} catch (IOException ex) {
Logger.getLogger(PanelGeoMap.class.getName()).log(Level.SEVERE,
null, ex);
}
}
}
I override the JPanel's paint method. PanelMap is inside a JScrollPane
and the renderer, in theory, only have to draw the visible viewport.
P.S.- I'm working in hardcoding the CRS for the a test.
[1]
-- full code start
public class PanelGeoMap extends JPanel implements MouseMotionListener {
private class PanelMap extends JPanel {
@Override
public void paint(Graphics g) {
try {
Graphics2D g2d = (Graphics2D) g;
Rectangle rectangle = new Rectangle(getSize());
//System.out.println("Map size (px): " +
rectangle.height
+ "x" + rectangle.width);
renderer.paint(g2d, rectangle,
mapContext.getLayerBounds());
} catch (IOException ex) {
Logger.getLogger(PanelGeoMap.class.getName()).log(Level.SEVERE,
null, ex);
}
}
}
private PanelMap panelMap;
private JScrollPane scrollPaneMap;
private Dimension preferredSizeMaximum;
private CoordinateReferenceSystem crs;
private GTRenderer renderer;
private Envelope env;
private DefaultMapContext mapContext;
public PanelGeoMap() {
renderer = new StreamingRenderer();
File file = null;
JFileChooser fc = new JFileChooser();
int ret = fc.showOpenDialog(this);
if (ret == JFileChooser.APPROVE_OPTION) {
file = fc.getSelectedFile();
} else {
System.exit(0);
}
AbstractGridCoverage2DReader reader;
try {
//reader = new GeoTiffReader(file, new
Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
reader = new ImageMosaicReader(file, new
Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
} catch (IOException ex) {
ex.printStackTrace();
return;
}
GridCoverage2D coverage;
try {
coverage = (GridCoverage2D) reader.read(null);
} catch (IOException ex) {
ex.printStackTrace();
return;
}
crs = coverage.getCoordinateReferenceSystem();
env = coverage.getEnvelope();
RenderedImage image = coverage.getRenderedImage();
StyleBuilder styleBuilder = new StyleBuilder();
ColorMap cm = styleBuilder.createColorMap(
new String[]{"0", "255"},
new double[]{0, 255},
new Color[]{ new Color(0, 0, 0),
new Color(255, 255, 255)},
ColorMap.TYPE_RAMP); // XXX: ?
RasterSymbolizer rs = styleBuilder.createRasterSymbolizer(cm,
1);
Style st = styleBuilder.createStyle(rs);
mapContext = new DefaultMapContext(crs);
mapContext.addLayer(reader, st);
renderer.setContext(mapContext);
RenderingHints hints = new
RenderingHints(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_SPEED);
renderer.setJava2DHints(hints);
Map renderParams = new HashMap();
renderParams.put("optimizedDataLoadingEnabled", new
Boolean(true));
renderer.setRendererHints(renderParams);
int width = image.getWidth();
int height = image.getHeight();
/* Debug. Speed compare */
JFrame frameJAI = new JFrame("DisplayJAI");
frameJAI.getContentPane().add(new JScrollPane(new
DisplayJAI(image)));
frameJAI.setVisible(true);
System.out.println("Image size: " + width + "x" + height);
panelMap = new PanelMap();
panelMap.addMouseMotionListener(this);
preferredSizeMaximum = new Dimension(width, height);
panelMap.setPreferredSize(preferredSizeMaximum);
scrollPaneMap = new JScrollPane(panelMap);
scrollPaneMap.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPaneMap.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
scrollPaneMap.setAutoscrolls(true);
add(scrollPaneMap, BorderLayout.CENTER);
}
public void zoomIn() {
Dimension preferredSizeActual = panelMap.getPreferredSize();
panelMap.setPreferredSize(new
Dimension(preferredSizeActual.width
- 2000, preferredSizeActual.height - 2000));
panelMap.revalidate();
}
public void zoomOut() {
Dimension preferredSizeActual = panelMap.getPreferredSize();
}
public void mouseDragged(MouseEvent e) {
System.out.println("Dragging " + e.getX() + " " + e.getY());
Rectangle r = new Rectangle(e.getX(), e.getY(), 1, 1);
scrollPaneMap.scrollRectToVisible(r);
}
public void mouseMoved(MouseEvent e) {
}
}
-- full code end
On mar, 2007-12-11 at 12:42 -0800, Jody Garnett wrote:
> Diego Fdez. Durán wrote:
> > I don't know if this questions are addressed to me but...
> >
> > Now I'm doing this[1], passing the reader directly to the
> > StreamingRenderer. I don't know how StreamingRenderer works internally.
> > I could download the StreamingRenderer from the SVN and take a look if
> > you want (but the original dev probably knows better than me how to
> > improve the renderer). I need to get the optimal performance and I'll be
> > glad if I can help in the improvement of GeoTools in the process.
> >
> > Thanks.
> >
> So two observations:
> 1) This part looks to be slow; can you hard code the CRS for a moment
> and see if you get a speed up? Not sure a good way to get the CRS but
> possible we can ask Simone to store it in the metadata the reader can
> get access to?
> > GridCoverage2D coverage;
> > try {
> > coverage = (GridCoverage2D) reader.read(null);
> > } catch (IOException ex) {
> > ex.printStackTrace();
> > return;
> > }
> >
> > crs = coverage.getCoordinateReferenceSystem();
> > RenderedImage image = coverage.getRenderedImage();
> 2) This part looks fine
> > mapContext = new DefaultMapContext(crs);
> > mapContext.addLayer(reader, st);
> > renderer.setContext(mapContext);
> But I want to know what happens next; when you use the renderer to draw
> (or paint) what are you painting onto?
> Jody
>
>
>
>
--
Diego Fdez. Durán <[EMAIL PROTECTED]> | http://www.goedi.net
GPG : 925C 9A21 7A11 3B13 6E43 50DB F579 D119 90D2 66BB
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