lwoSurfaceBlockHeader.cxx

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file lwoSurfaceBlockHeader.cxx
 * @author drose
 * @date 2001-04-24
 */

#include "lwoSurfaceBlockHeader.h"
#include "lwoInputFile.h"
#include "lwoSurfaceBlockChannel.h"
#include "lwoSurfaceBlockEnabled.h"
#include "lwoSurfaceBlockOpacity.h"
#include "lwoSurfaceBlockAxis.h"

#include "dcast.h"
#include "indent.h"

TypeHandle LwoSurfaceBlockHeader::_type_handle;

/**
 * Reads the data of the chunk in from the given input file, if possible.  The
 * ID and length of the chunk have already been read.  stop_at is the byte
 * position of the file to stop at (based on the current position at
 * in->get_bytes_read()).  Returns true on success, false otherwise.
 */
bool LwoSurfaceBlockHeader::
read_iff(IffInputFile *in, size_t stop_at) {
  LwoInputFile *lin = DCAST(LwoInputFile, in);

  _ordinal = lin->get_string();
  read_subchunks_iff(lin, stop_at);

  return true;
}

/**
 *
 */
void LwoSurfaceBlockHeader::
write(std::ostream &out, int indent_level) const {
  indent(out, indent_level)
    << get_id() << " {\n";
  indent(out, indent_level + 2)
    << "ordinal = 0x" << std::hex << std::setfill('0');

  std::string::const_iterator si;
  for (si = _ordinal.begin(); si != _ordinal.end(); ++si) {
    out << std::setw(2) << (int)(unsigned char)(*si);
  }

  out << std::dec << std::setfill(' ') << "\n";

  write_chunks(out, indent_level + 2);
  indent(out, indent_level)
    << "}\n";
}

/**
 * Allocates and returns a new chunk of the appropriate type based on the
 * given ID, according to the context given by this chunk itself.
 */
IffChunk *LwoSurfaceBlockHeader::
make_new_chunk(IffInputFile *in, IffId id) {
  if (id == IffId("CHAN")) {
    return new LwoSurfaceBlockChannel;

  } else if (id == IffId("ENAB")) {
    return new LwoSurfaceBlockEnabled;

  } else if (id == IffId("OPAC")) {
    return new LwoSurfaceBlockOpacity;

  } else if (id == IffId("AXIS")) {
    return new LwoSurfaceBlockAxis;

  } else {
    return IffChunk::make_new_chunk(in, id);
  }
}