void
create_fgbz_chunk(IFFByteStream &iff)
{
int nzones = g().colorzones.size();
int npalette = g().colorpalette->size() / 3;
GP<DjVuPalette> pal = DjVuPalette::create();
g().colorpalette->seek(0);
pal->decode_rgb_entries(*g().colorpalette, npalette);
pal->colordata.resize(0,blit_count-1);
for (int d=0; d<blit_count; d++)
{
JB2Blit *blit = g().stencil->get_blit(d);
const JB2Shape &shape = g().stencil->get_shape(blit->shapeno);
GRect brect(blit->left, blit->bottom, shape.bits->columns(), shape.bits->rows());
int index = nzones;
for (int i=0; i<nzones; i++)
{
GRect zrect = g().colorzones[i];
if (zrect.isempty() || zrect.intersect(brect, zrect))
index = i;
}
if (index >= npalette)
G_THROW("create_fgbz_chunk: internal error");
pal->colordata[d] = index;
}
iff.put_chunk("FGbz");
pal->encode(iff.get_bytestream());
iff.close_chunk();
}
void
cjb2(const GURL &urlin, const GURL &urlout, cjb2opts &opts)
{
GP<ByteStream> ibs=ByteStream::create(urlin, "rb");
CCImage rimg;
#if HAVE_TIFF
if (is_tiff(ibs))
read_tiff(rimg, ibs, opts);
else
#endif
{
GP<GBitmap> input=GBitmap::create(*ibs);
rimg.init(input->columns(), input->rows(), opts.dpi);
rimg.add_bitmap_runs(*input);
}
if (opts.verbose)
DjVuFormatErrorUTF8( "%s\t%d", ERR_MSG("cjb2.runs"),
rimg.runs.size() );
// Component analysis
rimg.make_ccids_by_analysis(); // obtain ccids
rimg.make_ccs_from_ccids(); // compute cc descriptors
if (opts.verbose)
DjVuFormatErrorUTF8( "%s\t%d", ERR_MSG("cjb2.ccs_before"),
rimg.ccs.size());
if (opts.losslevel > 0)
rimg.erase_tiny_ccs(); // clean
rimg.merge_and_split_ccs(); // reorganize weird ccs
rimg.sort_in_reading_order(); // sort cc descriptors
if (opts.verbose)
DjVuFormatErrorUTF8( "%s\t%d", ERR_MSG("cjb2.ccs_after"),
rimg.ccs.size());
// Pattern matching
GP<JB2Image> jimg = rimg.get_jb2image(); // get ``raw'' jb2image
rimg.runs.empty(); // save memory
rimg.ccs.empty(); // save memory
if (opts.losslevel>1)
tune_jb2image_lossy(jimg, opts.dpi, opts.losslevel);
else
tune_jb2image_lossless(jimg);
if (opts.verbose)
{
int nshape=0, nrefine=0;
for (int i=0; i<jimg->get_shape_count(); i++) {
if (!jimg->get_shape(i).bits) continue;
if (jimg->get_shape(i).parent >= 0) nrefine++;
nshape++;
}
DjVuFormatErrorUTF8( "%s\t%d\t%d", ERR_MSG("cjb2.shapes"),
nshape, nrefine);
}
// Code
GP<ByteStream> obs=ByteStream::create(urlout, "wb");
GP<IFFByteStream> giff=IFFByteStream::create(obs);
IFFByteStream &iff=*giff;
// -- main composite chunk
iff.put_chunk("FORM:DJVU", 1);
// -- ``INFO'' chunk
GP<DjVuInfo> ginfo=DjVuInfo::create();
DjVuInfo &info=*ginfo;
info.height = rimg.height;
info.width = rimg.width;
info.dpi = opts.dpi;
iff.put_chunk("INFO");
info.encode(*iff.get_bytestream());
iff.close_chunk();
// -- ``Sjbz'' chunk
iff.put_chunk("Sjbz");
jimg->encode(iff.get_bytestream());
iff.close_chunk();
// -- terminate main composite chunk
iff.close_chunk();
// Finished!
}
