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));
}