private boolean isBadTiling() throws IOException {
final int imageHeight = imageReader.getHeight(FIRST_IMAGE);
final int tileHeight = imageReader.getTileHeight(FIRST_IMAGE);
final int imageWidth = imageReader.getWidth(FIRST_IMAGE);
final int tileWidth = imageReader.getTileWidth(FIRST_IMAGE);
return tileWidth <= 1
|| tileHeight <= 1
|| imageWidth == tileWidth
|| imageHeight == tileHeight;
}
private void addBandsToProduct(TiffFileInfo tiffInfo, Product product) throws IOException {
final ImageReadParam readParam = imageReader.getDefaultReadParam();
TIFFRenderedImage baseImage =
(TIFFRenderedImage) imageReader.readAsRenderedImage(FIRST_IMAGE, readParam);
SampleModel sampleModel = baseImage.getSampleModel();
final int numBands = sampleModel.getNumBands();
final int productDataType = ImageManager.getProductDataType(sampleModel.getDataType());
bandMap = new HashMap<>(numBands);
for (int i = 0; i < numBands; i++) {
final String bandName = String.format("band_%d", i + 1);
final Band band = product.addBand(bandName, productDataType);
if (tiffInfo.containsField(BaselineTIFFTagSet.TAG_COLOR_MAP)
&& baseImage.getColorModel() instanceof IndexColorModel) {
band.setImageInfo(createIndexedImageInfo(product, baseImage, band));
}
bandMap.put(band, i);
}
}
private synchronized Raster readRect(
int sourceOffsetX,
int sourceOffsetY,
int sourceStepX,
int sourceStepY,
int destOffsetX,
int destOffsetY,
int destWidth,
int destHeight)
throws IOException {
ImageReadParam readParam = imageReader.getDefaultReadParam();
int subsamplingXOffset = sourceOffsetX % sourceStepX;
int subsamplingYOffset = sourceOffsetY % sourceStepY;
readParam.setSourceSubsampling(
sourceStepX, sourceStepY, subsamplingXOffset, subsamplingYOffset);
RenderedImage subsampledImage = imageReader.readAsRenderedImage(FIRST_IMAGE, readParam);
return subsampledImage.getData(new Rectangle(destOffsetX, destOffsetY, destWidth, destHeight));
}
private void setPreferredTiling(Product product) throws IOException {
final Dimension dimension;
if (isBadTiling()) {
dimension =
JAIUtils.computePreferredTileSize(
imageReader.getWidth(FIRST_IMAGE), imageReader.getHeight(FIRST_IMAGE), 1);
} else {
dimension =
new Dimension(
imageReader.getTileWidth(FIRST_IMAGE), imageReader.getTileHeight(FIRST_IMAGE));
}
if (isGlobalShifted180) {
product.setPreferredTileSize(
new Dimension(imageReader.getWidth(FIRST_IMAGE), imageReader.getHeight(FIRST_IMAGE)));
} else {
product.setPreferredTileSize(dimension);
}
}
Product readGeoTIFFProduct(final ImageInputStream stream, final File inputFile)
throws IOException {
Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(stream);
while (imageReaders.hasNext()) {
final ImageReader reader = imageReaders.next();
if (reader instanceof TIFFImageReader) {
imageReader = (TIFFImageReader) reader;
break;
}
}
if (imageReader == null) {
throw new IOException("GeoTiff imageReader not found");
}
imageReader.setInput(stream);
Product product = null;
final TIFFImageMetadata imageMetadata =
(TIFFImageMetadata) imageReader.getImageMetadata(FIRST_IMAGE);
final TiffFileInfo tiffInfo = new TiffFileInfo(imageMetadata.getRootIFD());
final TIFFField field = tiffInfo.getField(Utils.PRIVATE_BEAM_TIFF_TAG_NUMBER);
if (field != null && field.getType() == TIFFTag.TIFF_ASCII) {
final String s = field.getAsString(0).trim();
if (s.contains("<Dimap_Document")) { // with DIMAP header
InputStream is = null;
try {
final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = factory.newDocumentBuilder();
is = new ByteArrayInputStream(s.getBytes());
final Document document = new DOMBuilder().build(builder.parse(is));
product = DimapProductHelpers.createProduct(document);
removeGeoCodingAndTiePointGrids(product);
initBandsMap(product);
} catch (ParserConfigurationException | SAXException ignore) {
// ignore if it can not be read
} finally {
if (is != null) {
is.close();
}
}
}
}
if (product == null) { // without DIMAP header
final String productName;
if (tiffInfo.containsField(BaselineTIFFTagSet.TAG_IMAGE_DESCRIPTION)) {
final TIFFField field1 = tiffInfo.getField(BaselineTIFFTagSet.TAG_IMAGE_DESCRIPTION);
productName = field1.getAsString(0);
} else if (inputFile != null) {
productName = FileUtils.getFilenameWithoutExtension(inputFile);
} else {
productName = "geotiff";
}
final String productType = getReaderPlugIn().getFormatNames()[0];
final int width = imageReader.getWidth(FIRST_IMAGE);
final int height = imageReader.getHeight(FIRST_IMAGE);
product = new Product(productName, productType, width, height, this);
addBandsToProduct(tiffInfo, product);
}
if (tiffInfo.isGeotiff()) {
applyGeoCoding(tiffInfo, imageMetadata, product);
}
TiffTagToMetadataConverter.addTiffTagsToMetadata(
imageMetadata, tiffInfo, product.getMetadataRoot());
if (inputFile != null) {
product.setFileLocation(inputFile);
}
setPreferredTiling(product);
return product;
}