any_image.hpp

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00001 /*
00002     Copyright 2005-2007 Adobe Systems Incorporated
00003    
00004     Use, modification and distribution are subject to the Boost Software License,
00005     Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
00006     http://www.boost.org/LICENSE_1_0.txt).
00007 
00008     See http://opensource.adobe.com/gil for most recent version including documentation.
00009 */
00010 /*************************************************************************************************/
00011 
00012 #ifndef GIL_DYNAMICIMAGE_ANY_IMAGE_HPP
00013 #define GIL_DYNAMICIMAGE_ANY_IMAGE_HPP
00014 
00023 
00024 #include "any_image_view.hpp"
00025 #include "../../image.hpp"
00026 
00027 #ifdef _MSC_VER
00028 #pragma warning(push)
00029 #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)
00030 #endif
00031 
00032 namespace boost { namespace gil {
00033 
00034 namespace detail {
00035     template <typename T> struct get_view_t       { typedef typename T::view_t type; };
00036     template <typename Images> struct images_get_views_t : public mpl::transform<Images, get_view_t<mpl::_1> > {};
00037 
00038     template <typename T> struct get_const_view_t { typedef typename T::const_view_t type; };
00039     template <typename Images> struct images_get_const_views_t : public mpl::transform<Images, get_const_view_t<mpl::_1> > {};
00040 
00041     struct recreate_image_fnobj {
00042         typedef void result_type;
00043         const point2<std::ptrdiff_t>& _dimensions;
00044         unsigned _alignment;
00045 
00046         recreate_image_fnobj(const point2<std::ptrdiff_t>& dims, unsigned alignment) : _dimensions(dims), _alignment(alignment) {}
00047         template <typename Image> result_type operator()(Image& img) const { img.recreate(_dimensions,_alignment); }
00048     };
00049 
00050     template <typename AnyView>  // Models AnyViewConcept
00051     struct any_image_get_view {
00052         typedef AnyView result_type;
00053         template <typename Image> result_type operator()(      Image& img) const { return result_type(view(img)); }
00054     };
00055 
00056     template <typename AnyConstView>  // Models AnyConstViewConcept
00057     struct any_image_get_const_view {
00058         typedef AnyConstView result_type;
00059         template <typename Image> result_type operator()(const Image& img) const { return result_type(const_view(img)); }
00060     };
00061 }
00062 
00073 template <typename ImageTypes>
00074 class any_image : public variant<ImageTypes> {
00075     typedef variant<ImageTypes> parent_t;
00076 public:
00077     typedef any_image_view<typename detail::images_get_const_views_t<ImageTypes>::type> const_view_t;
00078     typedef any_image_view<typename detail::images_get_views_t<ImageTypes>::type>       view_t;
00079     typedef std::ptrdiff_t x_coord_t;
00080     typedef std::ptrdiff_t y_coord_t;
00081     typedef point2<std::ptrdiff_t> point_t;
00082 
00083     any_image()                                                          : parent_t() {}
00084     template <typename T> explicit any_image(const T& obj)               : parent_t(obj) {}
00085     template <typename T> explicit any_image(T& obj, bool do_swap)       : parent_t(obj,do_swap) {}
00086     any_image(const any_image& v)                                        : parent_t((const parent_t&)v)    {}
00087 
00088     template <typename T> any_image& operator=(const T& obj)             { parent_t::operator=(obj); return *this; }
00089     any_image&                       operator=(const any_image& v)       { parent_t::operator=((const parent_t&)v); return *this;}
00090 
00091     void recreate(const point_t& dims, unsigned alignment=1)               { apply_operation(*this,detail::recreate_image_fnobj(dims,alignment)); }
00092     void recreate(x_coord_t width, y_coord_t height, unsigned alignment=1) { recreate(point2<std::ptrdiff_t>(width,height),alignment); }
00093 
00094     std::size_t num_channels()  const { return apply_operation(*this, detail::any_type_get_num_channels()); }
00095     point_t     dimensions()    const { return apply_operation(*this, detail::any_type_get_dimensions()); }
00096     x_coord_t   width()         const { return dimensions().x; }
00097     y_coord_t   height()        const { return dimensions().y; }
00098 };
00099 
00103 
00105 
00107 template <typename Types>  GIL_FORCEINLINE // Models ImageVectorConcept
00108 typename any_image<Types>::view_t view(any_image<Types>& anyImage) { 
00109     return apply_operation(anyImage, detail::any_image_get_view<typename any_image<Types>::view_t>());
00110 }
00111 
00113 template <typename Types> GIL_FORCEINLINE // Models ImageVectorConcept
00114 typename any_image<Types>::const_view_t const_view(const any_image<Types>& anyImage) { 
00115     return apply_operation(anyImage, detail::any_image_get_const_view<typename any_image<Types>::const_view_t>());
00116 }
00118 
00119 } }  // namespace boost::gil
00120 
00121 #ifdef _MSC_VER
00122 #pragma warning(pop)
00123 #endif
00124 
00125 #endif

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