resample_progress.hpp

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#ifndef _TERRY_SAMPLER_RESAMPLE_HPP_
#define _TERRY_SAMPLER_RESAMPLE_HPP_

#include <terry/math/Rect.hpp>

#include <terry/sampler/all.hpp>
#include <terry/sampler/details.hpp>
#include <terry/sampler/sampler.hpp>


namespace terry {
namespace sampler {

/**
 * @brief Set each pixel in the destination view as the result of a sampling function over the transformed coordinates of the source view
 * @ingroup ImageAlgorithms
 *
 * The provided implementation works for 2D image views only
 */
template<
        typename Sampler, // Models SamplerConcept
        typename SrcView, // Models RandomAccess2DImageViewConcept
        typename DstView, // Models MutableRandomAccess2DImageViewConcept
        typename MapFn,
        typename Progress>
// Models MappingFunctionConcept
void resample_pixels_progress(
        const SrcView& src_view, const DstView& dst_view,
        const MapFn& dst_to_src, const terry::Rect<std::ssize_t>& procWindow,
        const EParamFilterOutOfImage& outOfImageProcess,
        Progress& p,
        Sampler sampler = Sampler() )
{
        typedef typename DstView::point_t Point2;
        typedef typename DstView::value_type Pixel;

        terry::point2<std::ssize_t> procWindowSize = procWindow.size();

        Point2 dst_p;
        Pixel black;
        color_convert( boost::gil::rgba32f_pixel_t( 0.0, 0.0, 0.0, 0.0 ), black );
        for( dst_p.y = procWindow.y1; dst_p.y < procWindow.y2; ++dst_p.y )
        {
                typename DstView::x_iterator xit = dst_view.row_begin( dst_p.y );
                for( dst_p.x = procWindow.x1; dst_p.x < procWindow.x2; ++dst_p.x )
                {

                        if( ! sample( sampler, src_view, transform( dst_to_src, dst_p ), xit[dst_p.x], outOfImageProcess ) )
                        {
                                xit[dst_p.x] = black; // if it is outside of the source image
                        }
                }
                if( p.progressForward( procWindowSize.x ) )
                        return;
        }
}

}
}

#endif