/* @see loci.formats.IFormatHandler#close() */
public void close() throws IOException {
if (out != null) {
writeFooter();
}
super.close();
numFrames = 0;
numFramesPointer = 0;
nextSequenceNumber = 0;
littleEndian = false;
}
/* @see loci.formats.IFormatHandler#setId(String) */
public void setId(String id) throws FormatException, IOException {
super.setId(id);
if (out.length() == 0) {
MetadataRetrieve r = getMetadataRetrieve();
int width = r.getPixelsSizeX(series).getValue().intValue();
int height = r.getPixelsSizeY(series).getValue().intValue();
int bytesPerPixel = FormatTools.getBytesPerPixel(r.getPixelsType(series).toString());
int nChannels = getSamplesPerPixel();
boolean indexed = getColorModel() != null && (getColorModel() instanceof IndexColorModel);
littleEndian = !r.getPixelsBinDataBigEndian(series, 0);
// write 8-byte PNG signature
out.write(PNG_SIG);
// write IHDR chunk
out.writeInt(13);
byte[] b = new byte[17];
b[0] = 'I';
b[1] = 'H';
b[2] = 'D';
b[3] = 'R';
DataTools.unpackBytes(width, b, 4, 4, false);
DataTools.unpackBytes(height, b, 8, 4, false);
b[12] = (byte) (bytesPerPixel * 8);
if (indexed) b[13] = (byte) 3;
else if (nChannels == 1) b[13] = (byte) 0;
else if (nChannels == 2) b[13] = (byte) 4;
else if (nChannels == 3) b[13] = (byte) 2;
else if (nChannels == 4) b[13] = (byte) 6;
b[14] = (byte) 0;
b[15] = (byte) 0;
b[16] = (byte) 0;
out.write(b);
out.writeInt(crc(b));
// write acTL chunk
out.writeInt(8);
out.writeBytes("acTL");
numFramesPointer = out.getFilePointer();
out.writeInt(0);
out.writeInt(0);
out.writeInt(0); // save a place for the CRC
}
}