public static int getNumberOfPages(RandomAccessFileOrArray ra) {
try {
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.read();
return sr.numberOfPages();
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
public static byte[] getGlobalSegment(RandomAccessFileOrArray ra) {
try {
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.read();
return sr.getGlobal(true);
} catch (Exception e) {
return null;
}
}
public static Image getJbig2Image(RandomAccessFileOrArray ra, int page) {
if (page < 1) throw new IllegalArgumentException("The page number must be >= 1.");
try {
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.read();
JBIG2SegmentReader.JBIG2Page p = sr.getPage(page);
Image img =
new ImgJBIG2(p.pageBitmapWidth, p.pageBitmapHeight, p.getData(true), sr.getGlobal(true));
return img;
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
