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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 |