@Override
public Raster readRaster(int frameIndex, ImageReadParam param) throws IOException {
readMetadata();
checkIndex(frameIndex);
if (decompressor != null) {
decompressor.setInput(iisOfFrame(frameIndex));
if (LOG.isDebugEnabled()) LOG.debug("Start decompressing frame #" + (frameIndex + 1));
Raster wr =
pmi.decompress() == pmi && decompressor.canReadRaster()
? decompressor.readRaster(0, decompressParam(param))
: decompressor.read(0, decompressParam(param)).getRaster();
if (LOG.isDebugEnabled()) LOG.debug("Finished decompressing frame #" + (frameIndex + 1));
return wr;
}
iis.seek(pixeldata.offset + frameIndex * frameLength);
WritableRaster wr = Raster.createWritableRaster(createSampleModel(dataType, banded), null);
DataBuffer buf = wr.getDataBuffer();
if (buf instanceof DataBufferByte) {
byte[][] data = ((DataBufferByte) buf).getBankData();
for (byte[] bs : data) iis.readFully(bs);
if (pixeldata.bigEndian && pixeldataVR.vr == VR.OW) ByteUtils.swapShorts(data);
} else {
short[] data = ((DataBufferUShort) buf).getData();
iis.readFully(data, 0, data.length);
}
return wr;
}
