PngParser.H

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/*!@file Raster/PngParser.H Parse png image files. */

// //////////////////////////////////////////////////////////////////// //
// The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2001 by the //
// University of Southern California (USC) and the iLab at USC.         //
// See http://iLab.usc.edu for information about this project.          //
// //////////////////////////////////////////////////////////////////// //
// Major portions of the iLab Neuromorphic Vision Toolkit are protected //
// under the U.S. patent ``Computation of Intrinsic Perceptual Saliency //
// in Visual Environments, and Applications'' by Christof Koch and      //
// Laurent Itti, California Institute of Technology, 2001 (patent       //
// pending; application number 09/912,225 filed July 23, 2001; see      //
// http://pair.uspto.gov/cgi-bin/final/home.pl for current status).     //
// //////////////////////////////////////////////////////////////////// //
// This file is part of the iLab Neuromorphic Vision C++ Toolkit.       //
//                                                                      //
// The iLab Neuromorphic Vision C++ Toolkit is free software; you can   //
// redistribute it and/or modify it under the terms of the GNU General  //
// Public License as published by the Free Software Foundation; either  //
// version 2 of the License, or (at your option) any later version.     //
//                                                                      //
// The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope  //
// that it will be useful, but WITHOUT ANY WARRANTY; without even the   //
// implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      //
// PURPOSE.  See the GNU General Public License for more details.       //
//                                                                      //
// You should have received a copy of the GNU General Public License    //
// along with the iLab Neuromorphic Vision C++ Toolkit; if not, write   //
// to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,   //
// Boston, MA 02111-1307 USA.                                           //
// //////////////////////////////////////////////////////////////////// //
//
// Primary maintainer for this file: Rob Peters <rjpeters@klab.caltech.edu>
// $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Raster/PngParser.H $
// $Id: PngParser.H 8141 2007-03-20 06:43:45Z rjpeters $
//

#ifndef PNGPARSER_H_DEFINED
#define PNGPARSER_H_DEFINED

#ifdef INVT_HAVE_LIBPNG

#include "Image/Dims.H"
#include "Raster/RasterParser.H"
#include "Util/Types.H"

template <class T> class Image;
template <class T> class PixRGB;

// ######################################################################
//! This class handles reading/parsing of PNG image files.
/*! Currently, grayscale and RGB images are supported, with 8-bit or
    16-bit pixel elements. */
class PngParser : public RasterParser
{
public:
  //! Intialize with the name of a PNG file.
  PngParser(const char* filename);

  //! Destructor.
  virtual ~PngParser();

  //! Get the specifications of the image without fully reading it
  virtual GenericFrameSpec getFrameSpec() const;

  //! Get the comments from the image without fully reading it
  virtual std::string getComments() const;

  //! Get image tags if the image supports them
  virtual uint getTagCount() const;

  //! Get image tags if the image supports them
  virtual bool getTag(uint tag, std::string &name, std::string &value) const;

  //! Get a GenericFrame representation from the raster file.
  /*! This can subsequently be converted to rgb, grayscale,
      floating-point, or video-yuv. */
  virtual GenericFrame getFrame();

private:
  Image<byte> parseGray();

  Image<PixRGB<byte> > parseRGB();

  PngParser(const PngParser&);
  PngParser& operator=(const PngParser&);

  struct Rep;
  Rep* const rep;
};

#endif // INVT_HAVE_LIBPNG

/* So things look consistent in everyone's emacs... */
/* Local Variables: */
/* indent-tabs-mode: nil */
/* End: */

#endif // !PNGPARSER_H_DEFINED