import new upstream nautilus stable release 14.2.8

[ceph.git] / ceph / src / boost / libs / gil / example / interleaved_ptr.cpp

//
// Copyright 2005-2007 Adobe Systems Incorporated
//
// 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
//
#ifdef WIN32
#define _CRT_SECURE_NO_DEPRECATE 1
#pragma warning(disable : 4244) //
#pragma warning(disable : 4996) // MSFT declared it deprecated
#endif

// Example file to demonstrate how to create a model of a pixel iterator

// FIXME: Review and remove if possible: gcc doesn't compile unless we forward-declare at_c before we include gil...
namespace boost { namespace gil {
    template <typename ChannelReference, typename Layout> struct interleaved_ref;
    template <typename ColorBase> struct element_reference_type;

    template <int K, typename ChannelReference, typename Layout>
    typename element_reference_type<interleaved_ref<ChannelReference,Layout>>::type
    at_c(const interleaved_ref<ChannelReference,Layout>& p);
} }

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

#include <iostream>

#include "interleaved_ptr.hpp"

int main(int argc, char* argv[])
{
    using namespace boost::gil;

    using rgb8_interleaved_ptr = interleaved_ptr<unsigned char*, rgb_layout_t>;
    using rgb8c_interleaved_ptr = interleaved_ptr<unsigned char const*, rgb_layout_t>;

    boost::function_requires<MutablePixelIteratorConcept<rgb8_interleaved_ptr>>();
    boost::function_requires<PixelIteratorConcept<rgb8c_interleaved_ptr>>();
    boost::function_requires<MemoryBasedIteratorConcept<memory_based_step_iterator<rgb8_interleaved_ptr>> >();

    boost::function_requires<MutablePixelConcept<rgb8_interleaved_ptr::value_type>>();
    boost::function_requires<PixelConcept<rgb8c_interleaved_ptr::value_type>>();

    using rgb8_interleaved_view_t = type_from_x_iterator<rgb8_interleaved_ptr >::view_t;
    using rgb8c_interleaved_view_t = type_from_x_iterator<rgb8c_interleaved_ptr>::view_t;

    boost::function_requires<MutableImageViewConcept<rgb8_interleaved_view_t>>();
    boost::function_requires<ImageViewConcept<rgb8c_interleaved_view_t>>();

    rgb8_image_t img;
    read_image("test.jpg", img, jpeg_tag{});

    // Get a raw pointer to the RGB buffer
    unsigned char* raw_ptr=&view(img)[0][0];

    // Construct a view from it, without casting it to rgb8_pixel_t*
    rgb8_interleaved_view_t src_view=interleaved_view(img.width(),img.height(),rgb8_interleaved_ptr(raw_ptr),
                                                      view(img).pixels().row_size());

    // Apply view transformations and algorithms on it
    write_view("out-interleaved_ptr.jpg",nth_channel_view(flipped_up_down_view(src_view),1), jpeg_tag{});

    return 0;
}