ceph/src/boost/libs/gil/include/boost/gil/extension/dynamic_image/any_image.hpp

   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 #ifndef GIL_DYNAMICIMAGE_ANY_IMAGE_HPP
  13 #define GIL_DYNAMICIMAGE_ANY_IMAGE_HPP
  14
  15 ////////////////////////////////////////////////////////////////////////////////////////
  16 /// \file
  17 /// \brief Support for run-time instantiated images and image views
  18 /// \author Lubomir Bourdev and Hailin Jin \n
  19 ///         Adobe Systems Incorporated
  20 ///
  21 ///
  22 ////////////////////////////////////////////////////////////////////////////////////////
  23
  24 #include "any_image_view.hpp"
  25 #include "../../image.hpp"
  26
  27 //#ifdef _MSC_VER
  28 //#pragma warning(push)
  29 //#pragma warning(disable : 4244)     // conversion from 'std::ptrdiff_t' to 'int', possible loss of data. even if we static-assert the two types are the same (on visual studio 8)
  30 //#endif
  31
  32 namespace boost { namespace gil {
  33
  34 namespace detail {
  35     template <typename T> struct get_view_t       { typedef typename T::view_t type; };
  36     template <typename Images> struct images_get_views_t : public mpl::transform<Images, get_view_t<mpl::_1> > {};
  37
  38     template <typename T> struct get_const_view_t { typedef typename T::const_view_t type; };
  39     template <typename Images> struct images_get_const_views_t : public mpl::transform<Images, get_const_view_t<mpl::_1> > {};
  40
  41     struct recreate_image_fnobj {
  42         typedef void result_type;
  43         const point2<std::ptrdiff_t>& _dimensions;
  44         unsigned _alignment;
  45
  46         recreate_image_fnobj(const point2<std::ptrdiff_t>& dims, unsigned alignment) : _dimensions(dims), _alignment(alignment) {}
  47         template <typename Image> result_type operator()(Image& img) const { img.recreate(_dimensions,_alignment); }
  48     };
  49
  50     template <typename AnyView>  // Models AnyViewConcept
  51     struct any_image_get_view {
  52         typedef AnyView result_type;
  53         template <typename Image> result_type operator()(      Image& img) const { return result_type(view(img)); }
  54     };
  55
  56     template <typename AnyConstView>  // Models AnyConstViewConcept
  57     struct any_image_get_const_view {
  58         typedef AnyConstView result_type;
  59         template <typename Image> result_type operator()(const Image& img) const { return result_type(const_view(img)); }
  60     };
  61 }
  62
  63 ////////////////////////////////////////////////////////////////////////////////////////
  64 /// \ingroup ImageModel
  65 /// \brief Represents a run-time specified image. Note it does NOT model ImageConcept
  66 ///
  67 /// Represents an image whose type (color space, layout, planar/interleaved organization, etc) can be specified at run time.
  68 /// It is the runtime equivalent of \p image.
  69 /// Some of the requirements of ImageConcept, such as the \p value_type typedef cannot be fulfilled, since the language does not allow runtime type specification.
  70 /// Other requirements, such as access to the pixels, would be inefficient to provide. Thus \p any_image does not fully model ImageConcept.
  71 /// In particular, its \p view and \p const_view methods return \p any_image_view, which does not fully model ImageViewConcept. See \p any_image_view for more.
  72 ////////////////////////////////////////////////////////////////////////////////////////
  73 template <typename ImageTypes>
  74 class any_image : public variant<ImageTypes> {
  75     typedef variant<ImageTypes> parent_t;
  76 public:
  77     typedef any_image_view<typename detail::images_get_const_views_t<ImageTypes>::type> const_view_t;
  78     typedef any_image_view<typename detail::images_get_views_t<ImageTypes>::type>       view_t;
  79     typedef std::ptrdiff_t x_coord_t;
  80     typedef std::ptrdiff_t y_coord_t;
  81     typedef point2<std::ptrdiff_t> point_t;
  82
  83     any_image()                                                          : parent_t() {}
  84     template <typename T> explicit any_image(const T& obj)               : parent_t(obj) {}
  85     template <typename T> explicit any_image(T& obj, bool do_swap)       : parent_t(obj,do_swap) {}
  86     any_image(const any_image& v)                                        : parent_t((const parent_t&)v)    {}
  87
  88     template <typename T> any_image& operator=(const T& obj)             { parent_t::operator=(obj); return *this; }
  89     any_image&                       operator=(const any_image& v)       { parent_t::operator=((const parent_t&)v); return *this;}
  90
  91     void recreate(const point_t& dims, unsigned alignment=1)               { apply_operation(*this,detail::recreate_image_fnobj(dims,alignment)); }
  92     void recreate(x_coord_t width, y_coord_t height, unsigned alignment=1) { recreate(point2<std::ptrdiff_t>(width,height),alignment); }
  93
  94     std::size_t num_channels()  const { return apply_operation(*this, detail::any_type_get_num_channels()); }
  95     point_t     dimensions()    const { return apply_operation(*this, detail::any_type_get_dimensions()); }
  96     x_coord_t   width()         const { return dimensions().x; }
  97     y_coord_t   height()        const { return dimensions().y; }
  98 };
  99
 100 ///@{
 101 /// \name view, const_view
 102 /// \brief Get an image view from a run-time instantiated image
 103
 104 /// \ingroup ImageModel
 105
 106 /// \brief Returns the non-constant-pixel view of any image. The returned view is any view.
 107 template <typename Types>  GIL_FORCEINLINE // Models ImageVectorConcept
 108 typename any_image<Types>::view_t view(any_image<Types>& anyImage) {
 109     return apply_operation(anyImage, detail::any_image_get_view<typename any_image<Types>::view_t>());
 110 }
 111
 112 /// \brief Returns the constant-pixel view of any image. The returned view is any view.
 113 template <typename Types> GIL_FORCEINLINE // Models ImageVectorConcept
 114 typename any_image<Types>::const_view_t const_view(const any_image<Types>& anyImage) {
 115     return apply_operation(anyImage, detail::any_image_get_const_view<typename any_image<Types>::const_view_t>());
 116 }
 117 ///@}
 118
 119 } }  // namespace boost::gil
 120
 121 //#ifdef _MSC_VER
 122 //#pragma warning(pop)
 123 //#endif
 124
 125 #endif