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299 lines
12 KiB
299 lines
12 KiB
/* |
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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_IMAGE_H |
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#define GIL_IMAGE_H |
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//////////////////////////////////////////////////////////////////////////////////////// |
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/// \file |
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/// \brief Templated image |
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/// \author Lubomir Bourdev and Hailin Jin \n |
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/// Adobe Systems Incorporated |
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/// \date 2005-2007 \n Last updated on February 12, 2007 |
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/// |
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//////////////////////////////////////////////////////////////////////////////////////// |
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#include <cstddef> |
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#include <memory> |
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#include "gil_config.hpp" |
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#include "image_view.hpp" |
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#include "metafunctions.hpp" |
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#include "algorithm.hpp" |
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namespace boost { namespace gil { |
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//#ifdef _MSC_VER |
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//#pragma warning(push) |
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//#pragma warning(disable : 4244) // conversion from 'gil::image<V,Alloc>::coord_t' to 'int', possible loss of data (visual studio compiler doesn't realize that the two types are the same) |
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//#endif |
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//////////////////////////////////////////////////////////////////////////////////////// |
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/// \ingroup ImageModel PixelBasedModel |
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/// \brief container interface over image view. Models ImageConcept, PixelBasedConcept |
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/// |
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/// A 2D container whose elements are pixels. It is templated over the pixel type, a boolean |
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/// indicating whether it should be planar, and an optional allocator. |
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/// |
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/// Note that its element type does not have to be a pixel. \p image can be instantiated with any Regular element, |
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/// in which case it models the weaker RandomAccess2DImageConcept and does not model PixelBasedConcept |
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/// |
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//////////////////////////////////////////////////////////////////////////////////////// |
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template< typename Pixel, bool IsPlanar = false, typename Alloc=std::allocator<unsigned char> > |
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class image { |
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public: |
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typedef typename Alloc::template rebind<unsigned char>::other allocator_type; |
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typedef typename view_type_from_pixel<Pixel, IsPlanar>::type view_t; |
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typedef typename view_t::const_t const_view_t; |
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typedef typename view_t::point_t point_t; |
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typedef typename view_t::coord_t coord_t; |
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typedef typename view_t::value_type value_type; |
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typedef coord_t x_coord_t; |
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typedef coord_t y_coord_t; |
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const point_t& dimensions() const { return _view.dimensions(); } |
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x_coord_t width() const { return _view.width(); } |
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y_coord_t height() const { return _view.height(); } |
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explicit image(std::size_t alignment=0, |
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const Alloc alloc_in = Alloc()) : |
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_memory(0), _align_in_bytes(alignment), _alloc(alloc_in) {} |
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// Create with dimensions and optional initial value and alignment |
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image(const point_t& dimensions, |
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std::size_t alignment=0, |
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const Alloc alloc_in = Alloc()) : _memory(0), _align_in_bytes(alignment), _alloc(alloc_in) { |
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allocate_and_default_construct(dimensions); |
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} |
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image(x_coord_t width, y_coord_t height, |
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std::size_t alignment=0, |
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const Alloc alloc_in = Alloc()) : _memory(0), _align_in_bytes(alignment), _alloc(alloc_in) { |
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allocate_and_default_construct(point_t(width,height)); |
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} |
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image(const point_t& dimensions, |
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const Pixel& p_in, |
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std::size_t alignment, |
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const Alloc alloc_in = Alloc()) : |
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_memory(0), _align_in_bytes(alignment), _alloc(alloc_in) { |
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allocate_and_fill(dimensions, p_in); |
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} |
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image(x_coord_t width, y_coord_t height, |
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const Pixel& p_in, |
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std::size_t alignment, |
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const Alloc alloc_in = Alloc()) : |
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_memory(0), _align_in_bytes(alignment), _alloc(alloc_in) { |
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allocate_and_fill(point_t(width,height),p_in); |
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} |
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image(const image& img) : |
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_memory(0), _align_in_bytes(img._align_in_bytes), _alloc(img._alloc) { |
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allocate_and_copy(img.dimensions(),img._view); |
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} |
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template <typename P2, bool IP2, typename Alloc2> |
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image(const image<P2,IP2,Alloc2>& img) : |
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_memory(0), _align_in_bytes(img._align_in_bytes), _alloc(img._alloc) { |
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allocate_and_copy(img.dimensions(),img._view); |
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} |
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image& operator=(const image& img) { |
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if (dimensions() == img.dimensions()) |
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copy_pixels(img._view,_view); |
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else { |
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image tmp(img); |
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swap(tmp); |
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} |
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return *this; |
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} |
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template <typename Img> |
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image& operator=(const Img& img) { |
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if (dimensions() == img.dimensions()) |
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copy_pixels(img._view,_view); |
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else { |
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image tmp(img); |
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swap(tmp); |
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} |
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return *this; |
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} |
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~image() { |
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destruct_pixels(_view); |
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deallocate(_view.dimensions()); |
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} |
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Alloc& allocator() { return _alloc; } |
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Alloc const& allocator() const { return _alloc; } |
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void swap(image& img) { // required by MutableContainerConcept |
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using std::swap; |
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swap(_align_in_bytes, img._align_in_bytes); |
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swap(_memory, img._memory); |
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swap(_view, img._view); |
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swap(_alloc, img._alloc); |
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} |
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void recreate(const point_t& dims, std::size_t alignment=0, const Alloc alloc_in = Alloc()) { |
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if (dims!=_view.dimensions() || _align_in_bytes!=alignment || alloc_in!=_alloc) { |
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image tmp(dims, alignment, alloc_in); |
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swap(tmp); |
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} |
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} |
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void recreate(x_coord_t width, y_coord_t height, std::size_t alignment=0, const Alloc alloc_in = Alloc()) { |
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recreate(point_t(width,height),alignment,alloc_in); |
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} |
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void recreate(const point_t& dims, |
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const Pixel& p_in, std::size_t alignment, const Alloc alloc_in = Alloc()) { |
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if (dims!=_view.dimensions() || _align_in_bytes!=alignment || alloc_in!=_alloc) { |
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image tmp(dims, p_in, alignment, alloc_in); |
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swap(tmp); |
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} |
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} |
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void recreate(x_coord_t width, y_coord_t height, |
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const Pixel& p_in, std::size_t alignment, const Alloc alloc_in = Alloc()) { |
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recreate(point_t(width,height),p_in,alignment,alloc_in); |
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} |
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view_t _view; // contains pointer to the pixels, the image size and ways to navigate pixels |
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private: |
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unsigned char* _memory; |
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std::size_t _align_in_bytes; |
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allocator_type _alloc; |
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void allocate_and_default_construct(const point_t& dimensions) { |
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try { |
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allocate_(dimensions,mpl::bool_<IsPlanar>()); |
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default_construct_pixels(_view); |
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} catch(...) { deallocate(dimensions); throw; } |
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} |
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void allocate_and_fill(const point_t& dimensions, const Pixel& p_in) { |
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try { |
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allocate_(dimensions,mpl::bool_<IsPlanar>()); |
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uninitialized_fill_pixels(_view, p_in); |
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} catch(...) { deallocate(dimensions); throw; } |
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} |
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template <typename View> |
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void allocate_and_copy(const point_t& dimensions, const View& v) { |
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try { |
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allocate_(dimensions,mpl::bool_<IsPlanar>()); |
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uninitialized_copy_pixels(v,_view); |
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} catch(...) { deallocate(dimensions); throw; } |
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} |
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void deallocate(const point_t& dimensions) { |
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if (_memory) _alloc.deallocate(_memory, total_allocated_size_in_bytes(dimensions)); |
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} |
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std::size_t total_allocated_size_in_bytes(const point_t& dimensions) const { |
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typedef typename view_t::x_iterator x_iterator; |
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// when value_type is a non-pixel, like int or float, num_channels< ... > doesn't work. |
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const std::size_t _channels_in_image = mpl::eval_if< is_pixel< value_type > |
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, num_channels< view_t > |
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, mpl::int_< 1 > |
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>::type::value; |
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std::size_t size_in_units = get_row_size_in_memunits(dimensions.x)*dimensions.y; |
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if (IsPlanar) |
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size_in_units = size_in_units * _channels_in_image ; |
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// return the size rounded up to the nearest byte |
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return ( size_in_units + byte_to_memunit< x_iterator >::value - 1 ) |
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/ byte_to_memunit<x_iterator>::value |
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+ ( _align_in_bytes > 0 ? _align_in_bytes - 1 : 0 ); // add extra padding in case we need to align the first image pixel |
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} |
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std::size_t get_row_size_in_memunits(x_coord_t width) const { // number of units per row |
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std::size_t size_in_memunits = width*memunit_step(typename view_t::x_iterator()); |
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if (_align_in_bytes>0) { |
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std::size_t alignment_in_memunits=_align_in_bytes*byte_to_memunit<typename view_t::x_iterator>::value; |
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return align(size_in_memunits, alignment_in_memunits); |
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} |
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return size_in_memunits; |
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} |
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void allocate_(const point_t& dimensions, mpl::false_) { // if it throws and _memory!=0 the client must deallocate _memory |
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_memory=_alloc.allocate(total_allocated_size_in_bytes(dimensions)); |
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unsigned char* tmp=(_align_in_bytes>0) ? (unsigned char*)align((std::size_t)_memory,_align_in_bytes) : _memory; |
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_view=view_t(dimensions,typename view_t::locator(typename view_t::x_iterator(tmp),get_row_size_in_memunits(dimensions.x))); |
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} |
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void allocate_(const point_t& dimensions, mpl::true_) { // if it throws and _memory!=0 the client must deallocate _memory |
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std::size_t row_size=get_row_size_in_memunits(dimensions.x); |
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std::size_t plane_size=row_size*dimensions.y; |
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_memory=_alloc.allocate(total_allocated_size_in_bytes(dimensions)); |
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unsigned char* tmp=(_align_in_bytes>0) ? (unsigned char*)align((std::size_t)_memory,_align_in_bytes) : _memory; |
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typename view_t::x_iterator first; |
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for (int i=0; i<num_channels<view_t>::value; ++i) { |
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dynamic_at_c(first,i) = (typename channel_type<view_t>::type*)tmp; |
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memunit_advance(dynamic_at_c(first,i), plane_size*i); |
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} |
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_view=view_t(dimensions, typename view_t::locator(first, row_size)); |
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} |
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}; |
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template <typename Pixel, bool IsPlanar, typename Alloc> |
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void swap(image<Pixel, IsPlanar, Alloc>& im1,image<Pixel, IsPlanar, Alloc>& im2) { |
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im1.swap(im2); |
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} |
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template <typename Pixel1, bool IsPlanar1, typename Alloc1, typename Pixel2, bool IsPlanar2, typename Alloc2> |
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bool operator==(const image<Pixel1,IsPlanar1,Alloc1>& im1,const image<Pixel2,IsPlanar2,Alloc2>& im2) { |
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if ((void*)(&im1)==(void*)(&im2)) return true; |
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if (const_view(im1).dimensions()!=const_view(im2).dimensions()) return false; |
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return equal_pixels(const_view(im1),const_view(im2)); |
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} |
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template <typename Pixel1, bool IsPlanar1, typename Alloc1, typename Pixel2, bool IsPlanar2, typename Alloc2> |
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bool operator!=(const image<Pixel1,IsPlanar1,Alloc1>& im1,const image<Pixel2,IsPlanar2,Alloc2>& im2) {return !(im1==im2);} |
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///@{ |
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/// \name view, const_view |
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/// \brief Get an image view from an image |
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/// \ingroup ImageModel |
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/// \brief Returns the non-constant-pixel view of an image |
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template <typename Pixel, bool IsPlanar, typename Alloc> inline |
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const typename image<Pixel,IsPlanar,Alloc>::view_t& view(image<Pixel,IsPlanar,Alloc>& img) { return img._view; } |
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/// \brief Returns the constant-pixel view of an image |
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template <typename Pixel, bool IsPlanar, typename Alloc> inline |
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const typename image<Pixel,IsPlanar,Alloc>::const_view_t const_view(const image<Pixel,IsPlanar,Alloc>& img) { |
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return static_cast<const typename image<Pixel,IsPlanar,Alloc>::const_view_t>(img._view); |
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} |
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///@} |
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///////////////////////////// |
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// PixelBasedConcept |
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///////////////////////////// |
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template <typename Pixel, bool IsPlanar, typename Alloc> |
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struct channel_type<image<Pixel,IsPlanar,Alloc> > : public channel_type<Pixel> {}; |
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template <typename Pixel, bool IsPlanar, typename Alloc> |
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struct color_space_type<image<Pixel,IsPlanar,Alloc> > : public color_space_type<Pixel> {}; |
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template <typename Pixel, bool IsPlanar, typename Alloc> |
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struct channel_mapping_type<image<Pixel,IsPlanar,Alloc> > : public channel_mapping_type<Pixel> {}; |
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template <typename Pixel, bool IsPlanar, typename Alloc> |
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struct is_planar<image<Pixel,IsPlanar,Alloc> > : public mpl::bool_<IsPlanar> {}; |
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//#ifdef _MSC_VER |
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//#pragma warning(pop) |
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//#endif |
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} } // namespace boost::gil |
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#endif
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