/** Construct a PngChunk with the specified number of data bytes. */
PngChunk(int dataLength) {
this(new byte[MIN_LENGTH + dataLength]);
setLength(dataLength);
}
/**
* Set the chunk's data. This method has two side-effects. 1. It will set the length field to be
* the length of the data array given. 2. It will set the CRC field to the computed CRC value of
* the data array given.
*/
void setData(byte[] data) {
setLength(data.length);
System.arraycopy(data, 0, reference, DATA_OFFSET, data.length);
setCRC(computeCRC());
}
