Ejemplo n.º 1
0
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();
}