ceph/src/boost/libs/gil/example/interleaved_ptr.cpp

   1 /*
   2     Copyright 2005-2007 Adobe Systems Incorporated
   3
   4     Use, modification and distribution are subject to the Boost Software License,
   5     Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6     http://www.boost.org/LICENSE_1_0.txt).
   7
   8     See http://opensource.adobe.com/gil for most recent version including documentation.
   9 */
  10
  11 /*************************************************************************************************/
  12
  13 /// \file
  14 /// \brief Example file to demonstrate how to create a model of a pixel iterator
  15 /// \author Lubomir Bourdev and Hailin Jin
  16 /// \date February 27, 2007
  17
  18 #ifdef WIN32
  19 #define _CRT_SECURE_NO_DEPRECATE 1
  20 #pragma warning(disable : 4244) //
  21 #pragma warning(disable : 4996) // MSFT declared it deprecated
  22 #endif
  23
  24 // gcc doesn't compile unless we forward-declare at_c before we include gil...
  25 namespace boost { namespace gil {
  26     template <typename ChannelReference, typename Layout> struct interleaved_ref;
  27     template <typename ColorBase> struct element_reference_type;
  28
  29     template <int K, typename ChannelReference, typename Layout>
  30     typename element_reference_type<interleaved_ref<ChannelReference,Layout> >::type
  31     at_c(const interleaved_ref<ChannelReference,Layout>& p);
  32 } }
  33
  34 #include <iostream>
  35 #include <boost/gil/extension/io/jpeg_dynamic_io.hpp>
  36 #include "interleaved_ptr.hpp"
  37
  38 int main(int argc, unsigned char* argv[])
  39 {
  40     using namespace boost::gil;
  41
  42     typedef interleaved_ptr<unsigned char*, rgb_layout_t> rgb8_interleaved_ptr;
  43     typedef interleaved_ptr<const unsigned char*, rgb_layout_t> rgb8c_interleaved_ptr;
  44
  45     boost::function_requires<MutablePixelIteratorConcept<rgb8_interleaved_ptr> >();
  46     boost::function_requires<PixelIteratorConcept<rgb8c_interleaved_ptr> >();
  47     boost::function_requires<MemoryBasedIteratorConcept<memory_based_step_iterator<rgb8_interleaved_ptr> > >();
  48
  49     boost::function_requires<MutablePixelConcept<rgb8_interleaved_ptr::value_type> >();
  50     boost::function_requires<PixelConcept<rgb8c_interleaved_ptr::value_type> >();
  51
  52     typedef type_from_x_iterator<rgb8_interleaved_ptr >::view_t rgb8_interleaved_view_t;
  53     typedef type_from_x_iterator<rgb8c_interleaved_ptr>::view_t rgb8c_interleaved_view_t;
  54
  55     boost::function_requires<MutableImageViewConcept<rgb8_interleaved_view_t> >();
  56     boost::function_requires<ImageViewConcept<rgb8c_interleaved_view_t> >();
  57
  58     rgb8_image_t img;
  59     jpeg_read_image("test.jpg", img);
  60
  61     // Get a raw pointer to the RGB buffer
  62     unsigned char* raw_ptr=&view(img)[0][0];
  63
  64     // Construct a view from it, without casting it to rgb8_pixel_t*
  65     rgb8_interleaved_view_t src_view=interleaved_view(img.width(),img.height(),rgb8_interleaved_ptr(raw_ptr),
  66                                                       view(img).pixels().row_size());
  67
  68     // Apply view transformations and algorithms on it
  69     jpeg_write_view("out-interleaved_ptr.jpg",nth_channel_view(flipped_up_down_view(src_view),1));
  70
  71     return 0;
  72 }
  73
  74