root/gilx/trunk/src/test/test_palette_view.cpp

/******************************************************************************
 * __LICENCE_BEGIN__
 *
 * __LICENCE_END__
 *****************************************************************************/

///@file
///@brief Test for i3dea::transform_view<>
///
///@author john.femiani@asu.edu
///
///

#include <i3dea/test.hpp>

#include <i3dea/gil/palette_image.hpp>
#include <i3dea/gil/rgb_functions.hpp>
#include <i3dea/gil/transform_view.hpp>

#include <boost/gil/gil_all.hpp>
#include <typeinfo>


using namespace i3dea;

namespace boost{ namespace gil{
std::ostream& operator<<(std::ostream& out,boost::gil::rgb8_pixel_t const & p)
{
    return out << "["
               << boost::gil::get_color(p, boost::gil::red_t()) << " "
               << boost::gil::get_color(p, boost::gil::red_t()) << " "
               << boost::gil::get_color(p, boost::gil::red_t())
               << "]";
}
} }

template<class XfmView, class Fn, class SrcView >
static
inline
void test_view(XfmView result, Fn f, SrcView src){
    I3DEA_CHECK( result(5, 5) == f(src(5,5)));
}

int main(int ac, char** av){
    using gil::rgb8_pixel_t;
    using boost::is_same;

    gil::gray8_image_t test_(10,10, gil::gray8_pixel_t(1));
    gil::gray8_view_t  test = view(test_);

    rgb8_pixel_t palette[256];
    palette[0] = rgb8_pixel_t(255, 255, 255);
    palette[1] = rgb8_pixel_t(255, 0, 0); //red
    palette[2] = rgb8_pixel_t(0, 255, 0); //green


    //Compute the view type
    typedef result_of::make_palette_view<
                gil::gray8_view_t,
                rgb8_pixel_t const*
                >::type
        palette_view_type;


    //Make sure the view has the proper typedefs
    BOOST_MPL_ASSERT((mpl::or_<
            is_same<palette_view_type::result_type, rgb8_pixel_t const&>,
            is_same<palette_view_type::result_type, rgb8_pixel_t>
            >));


    BOOST_MPL_ASSERT((is_same<palette_view_type::value_type, rgb8_pixel_t > ));

    BOOST_MPL_ASSERT(( is_same<palette_view_type::iterator::pointer,
                            rgb8_pixel_t const*> ));





    //Whew, finally an image.
    palette_view_type result = i3dea::make_palette_view(test, &palette[0]);


    test(5,0) = 0; //white
    test(5,1) = 1; //red
    test(5,2) = 2; //green
    test(5,3) = 3; //black

    I3DEA_CHECK_EQUAL( i3dea::make_palette_view(test, &palette[0])(5,5),
                       palette[test(5,5)] );


    I3DEA_CHECK( result(5,0) == palette[0]);
    I3DEA_CHECK( result(5,1) == palette[1]);
    I3DEA_CHECK( result(5,2) == palette[2]);
    I3DEA_CHECK( result(5,3) == palette[3]);

    return 0;
}