private BufferedImage createThumbNailImage(Dimension imgSize, ProgressMonitor pm) {
Assert.notNull(pm, "pm");
String thumbNailBandName = getThumbnailBandName();
Band thumbNailBand = product.getBand(thumbNailBandName);
Debug.trace(
"ProductSubsetDialog: Reading thumbnail data for band '" + thumbNailBandName + "'...");
pm.beginTask("Creating thumbnail image", 5);
BufferedImage image = null;
try {
MultiLevelSource multiLevelSource =
BandImageMultiLevelSource.create(thumbNailBand, SubProgressMonitor.create(pm, 1));
final ImageLayer imageLayer = new ImageLayer(multiLevelSource);
final int imageWidth = imgSize.width;
final int imageHeight = imgSize.height;
final int imageType = BufferedImage.TYPE_3BYTE_BGR;
image = new BufferedImage(imageWidth, imageHeight, imageType);
Viewport snapshotVp = new DefaultViewport(isModelYAxisDown(imageLayer));
final BufferedImageRendering imageRendering = new BufferedImageRendering(image, snapshotVp);
final Graphics2D graphics = imageRendering.getGraphics();
graphics.setColor(getBackground());
graphics.fillRect(0, 0, imageWidth, imageHeight);
snapshotVp.zoom(imageLayer.getModelBounds());
snapshotVp.moveViewDelta(snapshotVp.getViewBounds().x, snapshotVp.getViewBounds().y);
imageLayer.render(imageRendering);
pm.worked(4);
} finally {
pm.done();
}
return image;
}
private static RasterDataNode[] getReferencedNodes(final RasterDataNode node) {
final Product product = node.getProduct();
if (product != null) {
final List<String> expressions = new ArrayList<String>(10);
if (node.getValidPixelExpression() != null) {
expressions.add(node.getValidPixelExpression());
}
final ProductNodeGroup<Mask> overlayMaskGroup = node.getOverlayMaskGroup();
if (overlayMaskGroup.getNodeCount() > 0) {
final Mask[] overlayMasks =
overlayMaskGroup.toArray(new Mask[overlayMaskGroup.getNodeCount()]);
for (final Mask overlayMask : overlayMasks) {
final String expression;
if (overlayMask.getImageType() == Mask.BandMathsType.INSTANCE) {
expression = Mask.BandMathsType.getExpression(overlayMask);
} else if (overlayMask.getImageType() == Mask.RangeType.INSTANCE) {
expression = Mask.RangeType.getExpression(overlayMask);
} else {
expression = null;
}
if (expression != null) {
expressions.add(expression);
}
}
}
if (node instanceof VirtualBand) {
final VirtualBand virtualBand = (VirtualBand) node;
expressions.add(virtualBand.getExpression());
}
final ArrayList<Term> termList = new ArrayList<Term>(10);
for (final String expression : expressions) {
try {
final Term term = product.parseExpression(expression);
if (term != null) {
termList.add(term);
}
} catch (ParseException e) {
// @todo se handle parse exception
Debug.trace(e);
}
}
final Term[] terms = termList.toArray(new Term[termList.size()]);
final RasterDataSymbol[] refRasterDataSymbols = BandArithmetic.getRefRasterDataSymbols(terms);
return BandArithmetic.getRefRasters(refRasterDataSymbols);
}
return new RasterDataNode[0];
}