try {
FileInputStream fis = new FileInputStream(new File(acbFile));
header = new ACBHeader();
StructUnpacker up = JavaStruct.getUnpacker(fis,
ByteOrder.BIG_ENDIAN);
up.readObject(header);
switch (header.ColorSpaceID) {
case ACBHeader.RGB:
rgbColors = new RGBColor[header.colorCount];
for (int i = 0; i < header.colorCount; i++) {
rgbColors[i] = new RGBColor();