private int[] getActiveOverlayGroupOffsets(ImageReadParam param) {
if (param instanceof DicomImageReadParam) {
DicomImageReadParam dParam = (DicomImageReadParam) param;
Attributes psAttrs = dParam.getPresentationState();
if (psAttrs != null) return Overlays.getActiveOverlayGroupOffsets(psAttrs);
else
return Overlays.getActiveOverlayGroupOffsets(
metadata.getAttributes(), dParam.getOverlayActivationMask());
}
return Overlays.getActiveOverlayGroupOffsets(metadata.getAttributes(), 0xffff);
}
