126 lines
6.0 KiB
C++
126 lines
6.0 KiB
C++
/*
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Copyright 2005-2007 Adobe Systems Incorporated
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Use, modification and distribution are subject to the Boost Software License,
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Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt).
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See http://opensource.adobe.com/gil for most recent version including documentation.
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*/
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/*************************************************************************************************/
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#ifndef GIL_DYNAMICIMAGE_ANY_IMAGE_HPP
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#define GIL_DYNAMICIMAGE_ANY_IMAGE_HPP
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////////////////////////////////////////////////////////////////////////////////////////
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/// \file
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/// \brief Support for run-time instantiated images and image views
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/// \author Lubomir Bourdev and Hailin Jin \n
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/// Adobe Systems Incorporated
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///
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///
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////////////////////////////////////////////////////////////////////////////////////////
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#include "any_image_view.hpp"
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#include "../../image.hpp"
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//#ifdef _MSC_VER
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//#pragma warning(push)
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//#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)
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//#endif
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namespace boost { namespace gil {
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namespace detail {
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template <typename T> struct get_view_t { typedef typename T::view_t type; };
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template <typename Images> struct images_get_views_t : public mpl::transform<Images, get_view_t<mpl::_1> > {};
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template <typename T> struct get_const_view_t { typedef typename T::const_view_t type; };
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template <typename Images> struct images_get_const_views_t : public mpl::transform<Images, get_const_view_t<mpl::_1> > {};
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struct recreate_image_fnobj {
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typedef void result_type;
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const point2<std::ptrdiff_t>& _dimensions;
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unsigned _alignment;
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recreate_image_fnobj(const point2<std::ptrdiff_t>& dims, unsigned alignment) : _dimensions(dims), _alignment(alignment) {}
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template <typename Image> result_type operator()(Image& img) const { img.recreate(_dimensions,_alignment); }
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};
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template <typename AnyView> // Models AnyViewConcept
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struct any_image_get_view {
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typedef AnyView result_type;
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template <typename Image> result_type operator()( Image& img) const { return result_type(view(img)); }
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};
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template <typename AnyConstView> // Models AnyConstViewConcept
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struct any_image_get_const_view {
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typedef AnyConstView result_type;
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template <typename Image> result_type operator()(const Image& img) const { return result_type(const_view(img)); }
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};
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}
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////////////////////////////////////////////////////////////////////////////////////////
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/// \ingroup ImageModel
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/// \brief Represents a run-time specified image. Note it does NOT model ImageConcept
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///
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/// Represents an image whose type (color space, layout, planar/interleaved organization, etc) can be specified at run time.
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/// It is the runtime equivalent of \p image.
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/// 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.
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/// Other requirements, such as access to the pixels, would be inefficient to provide. Thus \p any_image does not fully model ImageConcept.
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/// 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.
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////////////////////////////////////////////////////////////////////////////////////////
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template <typename ImageTypes>
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class any_image : public variant<ImageTypes> {
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typedef variant<ImageTypes> parent_t;
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public:
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typedef any_image_view<typename detail::images_get_const_views_t<ImageTypes>::type> const_view_t;
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typedef any_image_view<typename detail::images_get_views_t<ImageTypes>::type> view_t;
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typedef std::ptrdiff_t x_coord_t;
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typedef std::ptrdiff_t y_coord_t;
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typedef point2<std::ptrdiff_t> point_t;
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any_image() : parent_t() {}
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template <typename T> explicit any_image(const T& obj) : parent_t(obj) {}
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template <typename T> explicit any_image(T& obj, bool do_swap) : parent_t(obj,do_swap) {}
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any_image(const any_image& v) : parent_t((const parent_t&)v) {}
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template <typename T> any_image& operator=(const T& obj) { parent_t::operator=(obj); return *this; }
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any_image& operator=(const any_image& v) { parent_t::operator=((const parent_t&)v); return *this;}
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void recreate(const point_t& dims, unsigned alignment=1) { apply_operation(*this,detail::recreate_image_fnobj(dims,alignment)); }
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void recreate(x_coord_t width, y_coord_t height, unsigned alignment=1) { recreate(point2<std::ptrdiff_t>(width,height),alignment); }
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std::size_t num_channels() const { return apply_operation(*this, detail::any_type_get_num_channels()); }
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point_t dimensions() const { return apply_operation(*this, detail::any_type_get_dimensions()); }
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x_coord_t width() const { return dimensions().x; }
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y_coord_t height() const { return dimensions().y; }
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};
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///@{
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/// \name view, const_view
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/// \brief Get an image view from a run-time instantiated image
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/// \ingroup ImageModel
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/// \brief Returns the non-constant-pixel view of any image. The returned view is any view.
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template <typename Types> GIL_FORCEINLINE // Models ImageVectorConcept
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typename any_image<Types>::view_t view(any_image<Types>& anyImage) {
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return apply_operation(anyImage, detail::any_image_get_view<typename any_image<Types>::view_t>());
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}
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/// \brief Returns the constant-pixel view of any image. The returned view is any view.
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template <typename Types> GIL_FORCEINLINE // Models ImageVectorConcept
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typename any_image<Types>::const_view_t const_view(const any_image<Types>& anyImage) {
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return apply_operation(anyImage, detail::any_image_get_const_view<typename any_image<Types>::const_view_t>());
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}
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///@}
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} } // namespace boost::gil
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//#ifdef _MSC_VER
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//#pragma warning(pop)
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//#endif
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#endif
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