//
// Copyright 2013 Christian Henning
//
// Distributed under the Boost Software License, Version 1.0
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
//
//#define BOOST_TEST_MODULE png_file_format_test_module
#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
#define BOOST_GIL_IO_ENABLE_GRAY_ALPHA
#define BOOST_FILESYSTEM_VERSION 3

#include <boost/gil/extension/io/png.hpp>

#include <boost/test/unit_test.hpp>

#include "paths.hpp"

using namespace std;
using namespace boost::gil;
namespace fs = boost::filesystem;

using tag_t = png_tag;

BOOST_AUTO_TEST_SUITE( gil_io_png_tests )

#ifdef BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES

// Test will loop through the "in" folder to read and convert
// the png's to rgb8_image_t's. Which then will be written in
// the "out" folder.
//
// The file name structure is as followed:
//
// g04i2c08.png
// || |||+---- bit-depth
// || ||+----- color-type (descriptive)
// || |+------ color-type (numerical)
// || +------- interlaced or non-interlaced
// |+--------- parameter of test (in this case gamma-value)
// +---------- test feature (in this case gamma)

BOOST_AUTO_TEST_CASE( file_format_test )
{
   string in ( png_in + "PngSuite\\" );

   fs::path in_path = fs::system_complete( fs::path( in ));

   if ( fs::is_directory( in_path ) )
   {
      fs::directory_iterator end_iter;
      for( fs::directory_iterator dir_itr( in_path )
         ; dir_itr != end_iter
         ; ++dir_itr
         )
      {
         if ( fs::is_regular( dir_itr->status() )
            && ( fs::extension( dir_itr->path() ) == ".PNG" ))
         {
            rgb8_image_t img;
            string filename = in + dir_itr->path().leaf().string();
            read_and_convert_image( filename, img, tag_t() );

#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
            write_view( png_out + fs::basename( dir_itr->path() ) + ".png"
                      , view( img )
                      , png_tag()
                      );
#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
         }
      }
   }
}

#endif // BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES

BOOST_AUTO_TEST_SUITE_END()