ColorGradientProcess.tcc

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#include <boost/numeric/conversion/cast.hpp>

namespace tuttle {
namespace plugin {
namespace colorGradient {

template<class View, template<typename> class ColorGradientFunctor>
ColorGradientProcess<View, ColorGradientFunctor>::ColorGradientProcess( ColorGradientPlugin& instance )
        : ImageGilProcessor<View>( instance, eImageOrientationFromBottomToTop )
        , _plugin( instance )
{}

template<class View, template<typename> class ColorGradientFunctor>
void ColorGradientProcess<View, ColorGradientFunctor>::setup( const OFX::RenderArguments& args )
{
        using namespace boost::gil;
        ImageGilProcessor<View>::setup( args );

        boost::function_requires<PixelLocatorConcept<Locator> >();
        gil_function_requires < StepIteratorConcept<typename Locator::x_iterator> >();

        // params
        ColorGradientProcessParams<View> params = _plugin.getProcessParams<View>();

        OfxRectD rod = _plugin._clipDst->getCanonicalRod( args.time );
        Point dims( rod.x2 - rod.x1, rod.y2 - rod.y1 );
        int yshift = boost::numeric_cast<int>( ( dims.x - dims.y ) * 0.5 );

        ColorGradientVirtualView colorGradient( Point( dims.x, dims.x ), Locator( Point( 0, 0 ), Point( 1, 1 ), ColorGradientFunctorT( dims, params._points, params._colors ) ) );
        // create a subview depending on the image ratio
        _srcView = subimage_view<>( colorGradient, 0, yshift, boost::numeric_cast<int>( dims.x ), boost::numeric_cast<int>( dims.y ) );
}

/**
 * @brief Function called by rendering thread each time a process must be done.
 * @param[in] procWindowRoW  Processing window in RoW
 */
template<class View, template<typename> class ColorGradientFunctor>
void ColorGradientProcess<View, ColorGradientFunctor>::multiThreadProcessImages( const OfxRectI& procWindowRoW )
{
        using namespace boost::gil;
        OfxRectI procWindowOutput = this->translateRoWToOutputClipCoordinates( procWindowRoW );
        const OfxPointI procWindowSize = {
                procWindowRoW.x2 - procWindowRoW.x1,
                procWindowRoW.y2 - procWindowRoW.y1 };

        for( int y = procWindowOutput.y1;
             y < procWindowOutput.y2;
             ++y )
        {
                typename ColorGradientVirtualView::x_iterator src_it = this->_srcView.x_at( procWindowOutput.x1, y );
                typename View::x_iterator dst_it                     = this->_dstView.x_at( procWindowOutput.x1, y );
                for( int x = procWindowOutput.x1;
                     x < procWindowOutput.x2;
                     ++x, ++src_it, ++dst_it )
                {
                        *dst_it = *src_it;
                }
                if( this->progressForward( procWindowSize.x ) )
                        return;
        }
}

}
}
}