parseCFFFDSelect function

dynamic parseCFFFDSelect(dynamic data, dynamic start, dynamic nGlyphs, dynamic fdArrayCount,)

Implementation

parseCFFFDSelect(data, start, nGlyphs, fdArrayCount) {
  var fdSelect = [];
  var fdIndex;
  var parser = Parser(data, start);
  var format = parser.parseCard8();
  if (format == 0) {
    // Simple list of nGlyphs elements
    for (var iGid = 0; iGid < nGlyphs; iGid++) {
      fdIndex = parser.parseCard8();
      if (fdIndex >= fdArrayCount) {
        throw ('CFF table CID Font FDSelect has bad FD index value ' +
            fdIndex +
            ' (FD count ' +
            fdArrayCount +
            ')');
      }
      fdSelect.add(fdIndex);
    }
  } else if (format == 3) {
    // Ranges
    var nRanges = parser.parseCard16();
    var first = parser.parseCard16();
    if (first != 0) {
      throw ('CFF Table CID Font FDSelect format 3 range has bad initial GID ' +
          first);
    }
    var next;
    for (var iRange = 0; iRange < nRanges; iRange++) {
      fdIndex = parser.parseCard8();
      next = parser.parseCard16();
      if (fdIndex >= fdArrayCount) {
        throw ('CFF table CID Font FDSelect has bad FD index value ' +
            fdIndex +
            ' (FD count ' +
            fdArrayCount +
            ')');
      }
      if (next > nGlyphs) {
        throw ('CFF Table CID Font FDSelect format 3 range has bad GID ' +
            next);
      }
      for (; first < next; first++) {
        fdSelect.add(fdIndex);
      }
      first = next;
    }
    if (next != nGlyphs) {
      throw ('CFF Table CID Font FDSelect format 3 range has bad final GID ' +
          next);
    }
  } else {
    throw ('CFF Table CID Font FDSelect table has unsupported format ' +
        format);
  }
  return fdSelect;
}