void fast_rgb_to_luv(const boost::gil::rgb8c_view_t &rgb_view,
const boost::gil::dev3n8_planar_view_t &luv_view)
{
using namespace boost::gil;
if(rgb_view.dimensions() != luv_view.dimensions())
{
throw std::invalid_argument("rgb_to_luv expects views of the same dimensions");
}
#pragma omp parallel for
for(size_t row=0; row < static_cast<size_t>(rgb_view.height()); row +=1)
{
rgb8c_view_t::x_iterator rgb_row_it = rgb_view.row_begin(row);
dev3n8_planar_view_t::x_iterator luv_row_it = luv_view.row_begin(row);
for(size_t col=0; col < static_cast<size_t>(rgb_view.width());
col +=1, ++rgb_row_it, ++luv_row_it)
{
(*luv_row_it) = rgb_to_luv(*rgb_row_it);
} // end of "for each column"
} // end of "for each row"
return;
}
bool GilViewToHBitmap(SHARED_HBITMAP &result, const boost::gil::rgb8c_view_t &view) {
BOOST_ASSERT(view.height() > 0);
BOOST_ASSERT(view.width() > 0);
BOOST_ASSERT(view.height() <= UINT_MAX);
BOOST_ASSERT(view.width() <= UINT_MAX);
const unsigned row = view.width() * view.num_channels();
BOOST_ASSERT(row * view.height() <= UINT_MAX);
std::vector<unsigned char> buffer(row * static_cast<unsigned int>(view.height()));
std::vector<unsigned char *> ptr_list(static_cast<unsigned int>(view.height()));
for(unsigned int i = 0; i < static_cast<unsigned int>(view.height()); i++) {
ptr_list[i] = &buffer[row * i];
std::copy(view.row_begin(static_cast<int>(i)), view.row_end(static_cast<int>(i)), reinterpret_cast<boost::gil::rgb8c_view_t::value_type *>(ptr_list[i]));
}
if(!CreateHBitmap(result, static_cast<unsigned int>(view.width()), static_cast<unsigned int>(view.height()), view.num_channels(), &ptr_list.front())) {
return false;
}
return true;
}