//
|
// Copyright 2005-2007 Adobe Systems Incorporated
|
//
|
// Distributed under the Boost Software License, Version 1.0
|
// See accompanying file LICENSE_1_0.txt or copy at
|
// http://www.boost.org/LICENSE_1_0.txt
|
//
|
#ifndef BOOST_GIL_METAFUNCTIONS_HPP
|
#define BOOST_GIL_METAFUNCTIONS_HPP
|
|
#include <boost/gil/channel.hpp>
|
#include <boost/gil/dynamic_step.hpp>
|
#include <boost/gil/concepts.hpp>
|
#include <boost/gil/concepts/detail/type_traits.hpp>
|
#include <boost/gil/detail/mp11.hpp>
|
|
#include <iterator>
|
#include <type_traits>
|
|
namespace boost { namespace gil {
|
|
// forward declarations
|
template <typename T, typename L> struct pixel;
|
template <typename BitField,typename ChannelRefs,typename Layout> struct packed_pixel;
|
template <typename T, typename C> struct planar_pixel_reference;
|
template <typename IC, typename C> struct planar_pixel_iterator;
|
template <typename I> class memory_based_step_iterator;
|
template <typename I> class memory_based_2d_locator;
|
template <typename L> class image_view;
|
template <typename Pixel, bool IsPlanar, typename Alloc> class image;
|
template <typename T> struct channel_type;
|
template <typename T> struct color_space_type;
|
template <typename T> struct channel_mapping_type;
|
template <typename It> struct is_iterator_adaptor;
|
template <typename It> struct iterator_adaptor_get_base;
|
template <typename BitField, typename ChannelBitSizes, typename Layout, bool IsMutable> struct bit_aligned_pixel_reference;
|
|
//////////////////////////////////////////////////
|
///
|
/// TYPE ANALYSIS METAFUNCTIONS
|
/// Predicate metafunctions determining properties of GIL types
|
///
|
//////////////////////////////////////////////////
|
|
|
/// \defgroup GILIsBasic xxx_is_basic
|
/// \ingroup TypeAnalysis
|
/// \brief Determines if GIL constructs are basic.
|
/// Basic constructs are the ones that can be generated with the type
|
/// factory methods pixel_reference_type, iterator_type, locator_type, view_type and image_type
|
/// They can be mutable/immutable, planar/interleaved, step/nonstep. They must use GIL-provided models.
|
|
/// \brief Determines if a given pixel reference is basic
|
/// Basic references must use gil::pixel& (if interleaved), gil::planar_pixel_reference (if planar). They must use the standard constness rules.
|
/// \ingroup GILIsBasic
|
template <typename PixelRef>
|
struct pixel_reference_is_basic : public std::false_type {};
|
|
template <typename T, typename L>
|
struct pixel_reference_is_basic<pixel<T, L>&> : std::true_type {};
|
|
template <typename T, typename L>
|
struct pixel_reference_is_basic<const pixel<T, L>&> : std::true_type {};
|
|
template <typename TR, typename CS>
|
struct pixel_reference_is_basic<planar_pixel_reference<TR, CS>> : std::true_type {};
|
|
template <typename TR, typename CS>
|
struct pixel_reference_is_basic<const planar_pixel_reference<TR, CS>> : std::true_type {};
|
|
/// \brief Determines if a given pixel iterator is basic
|
/// Basic iterators must use gil::pixel (if interleaved), gil::planar_pixel_iterator (if planar) and gil::memory_based_step_iterator (if step). They must use the standard constness rules.
|
/// \ingroup GILIsBasic
|
template <typename Iterator>
|
struct iterator_is_basic : std::false_type {};
|
|
/// \tparam T mutable interleaved pixel type
|
template <typename T, typename L>
|
struct iterator_is_basic<pixel<T, L>*> : std::true_type {};
|
|
/// \tparam T immutable interleaved pixel type
|
template <typename T, typename L>
|
struct iterator_is_basic<pixel<T, L> const*> : std::true_type {};
|
|
/// \tparam T mutable planar pixel type
|
template <typename T, typename CS>
|
struct iterator_is_basic<planar_pixel_iterator<T*, CS>> : std::true_type {};
|
|
/// \tparam T immutable planar pixel type
|
template <typename T, typename CS>
|
struct iterator_is_basic<planar_pixel_iterator<T const*, CS>> : std::true_type {};
|
|
/// \tparam T mutable interleaved step
|
template <typename T, typename L>
|
struct iterator_is_basic<memory_based_step_iterator<pixel<T, L>*>> : std::true_type {};
|
|
/// \tparam T immutable interleaved step
|
template <typename T, typename L>
|
struct iterator_is_basic<memory_based_step_iterator<pixel<T, L> const*>> : std::true_type {};
|
|
/// \tparam T mutable planar step
|
template <typename T, typename CS>
|
struct iterator_is_basic<memory_based_step_iterator<planar_pixel_iterator<T*, CS>>>
|
: std::true_type
|
{};
|
|
/// \tparam T immutable planar step
|
template <typename T, typename CS>
|
struct iterator_is_basic<memory_based_step_iterator<planar_pixel_iterator<T const*, CS>>>
|
: std::true_type
|
{};
|
|
|
/// \ingroup GILIsBasic
|
/// \brief Determines if a given locator is basic. A basic locator is memory-based and has basic x_iterator and y_iterator
|
template <typename Loc>
|
struct locator_is_basic : std::false_type {};
|
|
template <typename Iterator>
|
struct locator_is_basic
|
<
|
memory_based_2d_locator<memory_based_step_iterator<Iterator>>
|
> : iterator_is_basic<Iterator>
|
{};
|
|
/// \ingroup GILIsBasic
|
/// \brief Basic views must be over basic locators
|
template <typename View>
|
struct view_is_basic : std::false_type {};
|
|
template <typename Loc>
|
struct view_is_basic<image_view<Loc>> : locator_is_basic<Loc> {};
|
|
/// \ingroup GILIsBasic
|
/// \brief Basic images must use basic views and std::allocator
|
template <typename Img>
|
struct image_is_basic : std::false_type {};
|
|
template <typename Pixel, bool IsPlanar, typename Alloc>
|
struct image_is_basic<image<Pixel, IsPlanar, Alloc>> : std::true_type {};
|
|
|
/// \defgroup GILIsStep xxx_is_step
|
/// \ingroup TypeAnalysis
|
/// \brief Determines if the given iterator/locator/view has a step that could be set dynamically
|
|
template <typename I>
|
struct iterator_is_step;
|
|
namespace detail {
|
|
template <typename It, bool IsBase, bool EqualsStepType>
|
struct iterator_is_step_impl;
|
|
// iterator that has the same type as its dynamic_x_step_type must be a step iterator
|
template <typename It, bool IsBase>
|
struct iterator_is_step_impl<It, IsBase, true> : std::true_type {};
|
|
// base iterator can never be a step iterator
|
template <typename It>
|
struct iterator_is_step_impl<It, true, false> : std::false_type {};
|
|
// for an iterator adaptor, see if its base is step
|
template <typename It>
|
struct iterator_is_step_impl<It, false, false>
|
: public iterator_is_step<typename iterator_adaptor_get_base<It>::type> {};
|
|
} // namespace detail
|
|
/// \ingroup GILIsStep
|
/// \brief Determines if the given iterator has a step that could be set dynamically
|
template <typename I>
|
struct iterator_is_step
|
: detail::iterator_is_step_impl
|
<
|
I,
|
!is_iterator_adaptor<I>::value,
|
std::is_same<I, typename dynamic_x_step_type<I>::type
|
>::value
|
>
|
{};
|
|
/// \ingroup GILIsStep
|
/// \brief Determines if the given locator has a horizontal step that could be set dynamically
|
template <typename L> struct locator_is_step_in_x : public iterator_is_step<typename L::x_iterator> {};
|
|
/// \ingroup GILIsStep
|
/// \brief Determines if the given locator has a vertical step that could be set dynamically
|
template <typename L> struct locator_is_step_in_y : public iterator_is_step<typename L::y_iterator> {};
|
|
/// \ingroup GILIsStep
|
/// \brief Determines if the given view has a horizontal step that could be set dynamically
|
template <typename V> struct view_is_step_in_x : public locator_is_step_in_x<typename V::xy_locator> {};
|
|
/// \ingroup GILIsStep
|
/// \brief Determines if the given view has a vertical step that could be set dynamically
|
template <typename V> struct view_is_step_in_y : public locator_is_step_in_y<typename V::xy_locator> {};
|
|
/// \brief Determines whether the given pixel reference is a proxy class or a native C++ reference
|
/// \ingroup TypeAnalysis
|
template <typename PixelReference>
|
struct pixel_reference_is_proxy
|
: mp11::mp_not
|
<
|
std::is_same
|
<
|
typename detail::remove_const_and_reference<PixelReference>::type,
|
typename detail::remove_const_and_reference<PixelReference>::type::value_type
|
>
|
>
|
{};
|
|
/// \brief Given a model of a pixel, determines whether the model represents a pixel reference (as opposed to pixel value)
|
/// \ingroup TypeAnalysis
|
template <typename Pixel>
|
struct pixel_is_reference
|
: mp11::mp_or<is_reference<Pixel>, pixel_reference_is_proxy<Pixel>> {};
|
|
/// \defgroup GILIsMutable xxx_is_mutable
|
/// \ingroup TypeAnalysis
|
/// \brief Determines if the given pixel reference/iterator/locator/view is mutable (i.e. its pixels can be changed)
|
|
/// \ingroup GILIsMutable
|
/// \brief Determines if the given pixel reference is mutable (i.e. its channels can be changed)
|
///
|
/// Note that built-in C++ references obey the const qualifier but reference proxy classes do not.
|
template <typename R>
|
struct pixel_reference_is_mutable
|
: std::integral_constant<bool, std::remove_reference<R>::type::is_mutable>
|
{};
|
|
template <typename R>
|
struct pixel_reference_is_mutable<R const&>
|
: mp11::mp_and<pixel_reference_is_proxy<R>, pixel_reference_is_mutable<R>>
|
{};
|
|
/// \ingroup GILIsMutable
|
/// \brief Determines if the given locator is mutable (i.e. its pixels can be changed)
|
template <typename L> struct locator_is_mutable : public iterator_is_mutable<typename L::x_iterator> {};
|
/// \ingroup GILIsMutable
|
/// \brief Determines if the given view is mutable (i.e. its pixels can be changed)
|
template <typename V> struct view_is_mutable : public iterator_is_mutable<typename V::x_iterator> {};
|
|
|
//////////////////////////////////////////////////
|
///
|
/// TYPE FACTORY METAFUNCTIONS
|
/// Metafunctions returning GIL types from other GIL types
|
///
|
//////////////////////////////////////////////////
|
|
/// \defgroup TypeFactoryFromElements xxx_type
|
/// \ingroup TypeFactory
|
/// \brief Returns the type of a homogeneous GIL construct given its elements (channel, layout, whether it is planar, step, mutable, etc.)
|
|
/// \defgroup TypeFactoryFromPixel xxx_type_from_pixel
|
/// \ingroup TypeFactory
|
/// \brief Returns the type of a GIL construct given its pixel type, whether it is planar, step, mutable, etc.
|
|
/// \defgroup TypeFactoryDerived derived_xxx_type
|
/// \ingroup TypeFactory
|
/// \brief Returns the type of a homogeneous GIL construct given a related construct by changing some of its properties
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a homogeneous pixel reference given the channel type, layout, whether it operates on planar data and whether it is mutable
|
template <typename T, typename L, bool IsPlanar=false, bool IsMutable=true> struct pixel_reference_type{};
|
template <typename T, typename L> struct pixel_reference_type<T,L,false,true > { using type = pixel<T,L>&; };
|
template <typename T, typename L> struct pixel_reference_type<T,L,false,false> { using type = pixel<T,L> const&; };
|
template <typename T, typename L> struct pixel_reference_type<T,L,true,true> { using type = planar_pixel_reference<typename channel_traits<T>::reference,typename color_space_type<L>::type> const; }; // TODO: Assert M=identity
|
template <typename T, typename L> struct pixel_reference_type<T,L,true,false> { using type = planar_pixel_reference<typename channel_traits<T>::const_reference,typename color_space_type<L>::type> const; };// TODO: Assert M=identity
|
|
/// \ingroup TypeFactoryFromPixel
|
/// \brief Returns the type of a pixel iterator given the pixel type, whether it operates on planar data, whether it is a step iterator, and whether it is mutable
|
template <typename Pixel, bool IsPlanar=false, bool IsStep=false, bool IsMutable=true> struct iterator_type_from_pixel{};
|
template <typename Pixel> struct iterator_type_from_pixel<Pixel,false,false,true > { using type = Pixel *; };
|
template <typename Pixel> struct iterator_type_from_pixel<Pixel,false,false,false> { using type = const Pixel *; };
|
template <typename Pixel> struct iterator_type_from_pixel<Pixel,true,false,true> {
|
using type = planar_pixel_iterator<typename channel_traits<typename channel_type<Pixel>::type>::pointer,typename color_space_type<Pixel>::type>;
|
};
|
template <typename Pixel> struct iterator_type_from_pixel<Pixel,true,false,false> {
|
using type = planar_pixel_iterator<typename channel_traits<typename channel_type<Pixel>::type>::const_pointer,typename color_space_type<Pixel>::type>;
|
};
|
template <typename Pixel, bool IsPlanar, bool IsMutable> struct iterator_type_from_pixel<Pixel,IsPlanar,true,IsMutable> {
|
using type = memory_based_step_iterator<typename iterator_type_from_pixel<Pixel,IsPlanar,false,IsMutable>::type>;
|
};
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a homogeneous iterator given the channel type, layout, whether it operates on planar data, whether it is a step iterator, and whether it is mutable
|
template <typename T, typename L, bool IsPlanar=false, bool IsStep=false, bool IsMutable=true> struct iterator_type{};
|
template <typename T, typename L> struct iterator_type<T,L,false,false,true > { using type = pixel<T,L>*; };
|
template <typename T, typename L> struct iterator_type<T,L,false,false,false> { using type = pixel<T,L> const*; };
|
template <typename T, typename L> struct iterator_type<T,L,true,false,true> { using type = planar_pixel_iterator<T*,typename L::color_space_t>; }; // TODO: Assert M=identity
|
template <typename T, typename L> struct iterator_type<T,L,true,false,false> { using type = planar_pixel_iterator<const T*,typename L::color_space_t>; }; // TODO: Assert M=identity
|
template <typename T, typename L, bool IsPlanar, bool IsMutable> struct iterator_type<T,L,IsPlanar,true,IsMutable> {
|
using type = memory_based_step_iterator<typename iterator_type<T,L,IsPlanar,false,IsMutable>::type>;
|
};
|
|
/// \brief Given a pixel iterator defining access to pixels along a row, returns the types of the corresponding built-in step_iterator, xy_locator, image_view
|
/// \ingroup TypeFactory
|
template <typename XIterator>
|
struct type_from_x_iterator
|
{
|
using step_iterator_t = memory_based_step_iterator<XIterator>;
|
using xy_locator_t = memory_based_2d_locator<step_iterator_t>;
|
using view_t = image_view<xy_locator_t>;
|
};
|
|
namespace detail {
|
|
template <typename BitField, typename FirstBit, typename NumBits>
|
struct packed_channel_reference_type
|
{
|
using type = packed_channel_reference
|
<
|
BitField, FirstBit::value, NumBits::value, true
|
> const;
|
};
|
|
template <typename BitField, typename ChannelBitSizes>
|
class packed_channel_references_vector_type
|
{
|
template <typename FirstBit, typename NumBits>
|
using reference_type = typename packed_channel_reference_type<BitField, FirstBit, NumBits>::type;
|
|
// If ChannelBitSizesVector is mp11::mp_list_c<int,7,7,2>
|
// Then first_bits_vector will be mp11::mp_list_c<int,0,7,14,16>
|
using first_bit_list = mp11::mp_fold_q
|
<
|
ChannelBitSizes,
|
mp11::mp_list<std::integral_constant<int, 0>>,
|
mp11::mp_bind
|
<
|
mp11::mp_push_back,
|
mp11::_1,
|
mp11::mp_bind
|
<
|
mp11::mp_plus,
|
mp11::mp_bind<mp_back, mp11::_1>,
|
mp11::_2
|
>
|
>
|
>;
|
|
static_assert(mp11::mp_at_c<first_bit_list, 0>::value == 0, "packed channel first bit must be 0");
|
|
public:
|
using type = mp11::mp_transform
|
<
|
reference_type,
|
mp_pop_back<first_bit_list>,
|
ChannelBitSizes
|
>;
|
};
|
|
} // namespace detail
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a packed pixel given its bitfield type, the bit size of its channels and its layout.
|
///
|
/// A packed pixel has channels that cover bit ranges but itself is byte aligned. RGB565 pixel is an example.
|
///
|
/// The size of ChannelBitSizes must equal the number of channels in the given layout
|
/// The sum of bit sizes for all channels must be less than or equal to the number of bits in BitField (and cannot exceed 64).
|
/// If it is less than the number of bits in BitField, the last bits will be unused.
|
template <typename BitField, typename ChannelBitSizes, typename Layout>
|
struct packed_pixel_type
|
{
|
using type = packed_pixel
|
<
|
BitField,
|
typename detail::packed_channel_references_vector_type
|
<
|
BitField,
|
ChannelBitSizes
|
>::type,
|
Layout>;
|
};
|
|
/// \defgroup TypeFactoryPacked packed_image_type,bit_aligned_image_type
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of an image whose channels are not byte-aligned.
|
///
|
/// A packed image is an image whose pixels are byte aligned, such as "rgb565". <br>
|
/// A bit-aligned image is an image whose pixels are not byte aligned, such as "rgb222". <br>
|
///
|
/// The sum of the bit sizes of all channels cannot exceed 64.
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of an interleaved packed image: an image whose channels may not be byte-aligned, but whose pixels are byte aligned.
|
template <typename BitField, typename ChannelBitSizes, typename Layout, typename Alloc=std::allocator<unsigned char>>
|
struct packed_image_type
|
{
|
using type = image<typename packed_pixel_type<BitField,ChannelBitSizes,Layout>::type,false,Alloc>;
|
};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a single-channel image given its bitfield type, the bit size of its channel and its layout
|
template <typename BitField, unsigned Size1, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct packed_image1_type
|
: packed_image_type<BitField, mp11::mp_list_c<unsigned, Size1>, Layout, Alloc>
|
{};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a two channel image given its bitfield type, the bit size of its channels and its layout
|
template <typename BitField, unsigned Size1, unsigned Size2, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct packed_image2_type
|
: packed_image_type<BitField, mp11::mp_list_c<unsigned, Size1, Size2>, Layout, Alloc>
|
{};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a three channel image given its bitfield type, the bit size of its channels and its layout
|
template <typename BitField, unsigned Size1, unsigned Size2, unsigned Size3, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct packed_image3_type
|
: packed_image_type<BitField, mp11::mp_list_c<unsigned, Size1, Size2, Size3>, Layout, Alloc>
|
{};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a four channel image given its bitfield type, the bit size of its channels and its layout
|
template <typename BitField, unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct packed_image4_type
|
: packed_image_type<BitField, mp11::mp_list_c<unsigned, Size1, Size2, Size3, Size4>, Layout, Alloc>
|
{};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a five channel image given its bitfield type, the bit size of its channels and its layout
|
template <typename BitField, unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, unsigned Size5, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct packed_image5_type
|
: packed_image_type<BitField, mp11::mp_list_c<unsigned, Size1, Size2, Size3, Size4, Size5>, Layout, Alloc> {};
|
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a packed image whose pixels may not be byte aligned. For example, an "rgb222" image is bit-aligned because its pixel spans six bits.
|
///
|
/// Note that the alignment parameter in the constructor of bit-aligned images is in bit units. For example, if you want to construct a bit-aligned
|
/// image whose rows are byte-aligned, use 8 as the alignment parameter, not 1.
|
///
|
template
|
<
|
typename ChannelBitSizes,
|
typename Layout,
|
typename Alloc = std::allocator<unsigned char>
|
>
|
struct bit_aligned_image_type
|
{
|
private:
|
|
static constexpr int bit_size =
|
mp11::mp_fold
|
<
|
ChannelBitSizes,
|
std::integral_constant<int, 0>,
|
mp11::mp_plus
|
>::value;
|
|
using bitfield_t = typename detail::min_fast_uint<bit_size + 7>::type;
|
using bit_alignedref_t = bit_aligned_pixel_reference<bitfield_t, ChannelBitSizes, Layout, true> const;
|
|
public:
|
using type = image<bit_alignedref_t,false,Alloc>;
|
};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a single-channel bit-aligned image given the bit size of its channel and its layout
|
template <unsigned Size1, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct bit_aligned_image1_type : bit_aligned_image_type<mp11::mp_list_c<unsigned, Size1>, Layout, Alloc> {};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a two channel bit-aligned image given the bit size of its channels and its layout
|
template <unsigned Size1, unsigned Size2, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct bit_aligned_image2_type : bit_aligned_image_type<mp11::mp_list_c<unsigned, Size1, Size2>, Layout, Alloc> {};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a three channel bit-aligned image given the bit size of its channels and its layout
|
template <unsigned Size1, unsigned Size2, unsigned Size3, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct bit_aligned_image3_type : bit_aligned_image_type<mp11::mp_list_c<unsigned, Size1, Size2, Size3>, Layout, Alloc> {};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a four channel bit-aligned image given the bit size of its channels and its layout
|
template <unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct bit_aligned_image4_type : bit_aligned_image_type<mp11::mp_list_c<unsigned, Size1, Size2, Size3, Size4>, Layout, Alloc> {};
|
|
/// \ingroup TypeFactoryPacked
|
/// \brief Returns the type of a five channel bit-aligned image given the bit size of its channels and its layout
|
template <unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, unsigned Size5, typename Layout, typename Alloc = std::allocator<unsigned char>>
|
struct bit_aligned_image5_type : bit_aligned_image_type<mp11::mp_list_c<unsigned, Size1, Size2, Size3, Size4, Size5>, Layout, Alloc> {};
|
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a homogeneous pixel given the channel type and layout
|
template <typename Channel, typename Layout>
|
struct pixel_value_type
|
{
|
// by default use gil::pixel. Specializations are provided for
|
using type = pixel<Channel, Layout>;
|
};
|
|
// Specializations for packed channels
|
template <typename BitField, int NumBits, bool IsMutable, typename Layout>
|
struct pixel_value_type<packed_dynamic_channel_reference<BitField, NumBits, IsMutable>, Layout>
|
: packed_pixel_type<BitField, mp11::mp_list_c<unsigned, NumBits>, Layout>
|
{};
|
|
template <typename BitField, int NumBits, bool IsMutable, typename Layout>
|
struct pixel_value_type<packed_dynamic_channel_reference<BitField, NumBits, IsMutable> const, Layout>
|
: packed_pixel_type<BitField, mp11::mp_list_c<unsigned, NumBits>, Layout>
|
{};
|
|
template <typename BitField, int FirstBit, int NumBits, bool IsMutable, typename Layout>
|
struct pixel_value_type<packed_channel_reference<BitField, FirstBit, NumBits, IsMutable>, Layout>
|
: packed_pixel_type<BitField, mp11::mp_list_c<unsigned, NumBits>, Layout>
|
{};
|
|
template <typename BitField, int FirstBit, int NumBits, bool IsMutable, typename Layout>
|
struct pixel_value_type<packed_channel_reference<BitField, FirstBit, NumBits, IsMutable> const, Layout>
|
: packed_pixel_type<BitField, mp11::mp_list_c<unsigned, NumBits>, Layout>
|
{};
|
|
template <int NumBits, typename Layout>
|
struct pixel_value_type<packed_channel_value<NumBits>, Layout>
|
: packed_pixel_type<typename detail::min_fast_uint<NumBits>::type, mp11::mp_list_c<unsigned, NumBits>, Layout>
|
{};
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a homogeneous locator given the channel type, layout, whether it operates on planar data and whether it has a step horizontally
|
template <typename T, typename L, bool IsPlanar = false, bool IsStepX = false, bool IsMutable = true>
|
struct locator_type
|
{
|
using type = typename type_from_x_iterator
|
<
|
typename iterator_type<T, L, IsPlanar, IsStepX, IsMutable>::type
|
>::xy_locator_type;
|
};
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a homogeneous view given the channel type, layout, whether it operates on planar data and whether it has a step horizontally
|
template <typename T, typename L, bool IsPlanar = false, bool IsStepX = false, bool IsMutable = true>
|
struct view_type
|
{
|
using type = typename type_from_x_iterator
|
<
|
typename iterator_type<T, L, IsPlanar, IsStepX, IsMutable>::type
|
>::view_t;
|
};
|
|
/// \ingroup TypeFactoryFromElements
|
/// \brief Returns the type of a homogeneous image given the channel type, layout, and whether it operates on planar data
|
template <typename T, typename L, bool IsPlanar = false, typename Alloc = std::allocator<unsigned char>>
|
struct image_type
|
{
|
using type = image<pixel<T, L>, IsPlanar, Alloc>;
|
};
|
|
/// \ingroup TypeFactoryFromPixel
|
/// \brief Returns the type of a view the pixel type, whether it operates on planar data and whether it has a step horizontally
|
template <typename Pixel, bool IsPlanar=false, bool IsStepX=false, bool IsMutable=true>
|
struct view_type_from_pixel {
|
using type = typename type_from_x_iterator<typename iterator_type_from_pixel<Pixel,IsPlanar,IsStepX,IsMutable>::type>::view_t;
|
};
|
|
|
/// \brief Constructs a pixel reference type from a source pixel reference type by changing some of the properties.
|
/// \ingroup TypeFactoryDerived
|
/// Use use_default for the properties of the source view that you want to keep
|
template
|
<
|
typename Ref,
|
typename T = use_default,
|
typename L = use_default,
|
typename IsPlanar = use_default,
|
typename IsMutable = use_default>
|
class derived_pixel_reference_type
|
{
|
using pixel_t = typename std::remove_reference<Ref>::type;
|
|
using channel_t = typename mp11::mp_if
|
<
|
std::is_same<T, use_default>,
|
typename channel_type<pixel_t>::type,
|
T
|
>::type;
|
|
using layout_t = typename mp11::mp_if
|
<
|
std::is_same<L, use_default>,
|
layout
|
<
|
typename color_space_type<pixel_t>::type,
|
typename channel_mapping_type<pixel_t>::type
|
>,
|
L
|
>::type;
|
|
static bool const mut = mp11::mp_if
|
<
|
std::is_same<IsMutable, use_default>,
|
pixel_reference_is_mutable<Ref>,
|
IsMutable
|
>::value;
|
|
static bool const planar = mp11::mp_if
|
<
|
std::is_same<IsPlanar, use_default>,
|
is_planar<pixel_t>,
|
IsPlanar
|
>::value;
|
|
public:
|
using type = typename pixel_reference_type<channel_t, layout_t, planar, mut>::type;
|
};
|
|
/// \brief Constructs a pixel iterator type from a source pixel iterator type by changing some of the properties.
|
/// \ingroup TypeFactoryDerived
|
/// Use use_default for the properties of the source view that you want to keep
|
template
|
<
|
typename Iterator,
|
typename T = use_default,
|
typename L = use_default,
|
typename IsPlanar = use_default,
|
typename IsStep = use_default,
|
typename IsMutable = use_default
|
>
|
class derived_iterator_type
|
{
|
using channel_t = typename mp11::mp_if
|
<
|
std::is_same<T, use_default>,
|
typename channel_type<Iterator>::type,
|
T
|
>::type;
|
|
using layout_t = typename mp11::mp_if
|
<
|
std::is_same<L, use_default>,
|
layout
|
<
|
typename color_space_type<Iterator>::type,
|
typename channel_mapping_type<Iterator>::type
|
>,
|
L
|
>::type;
|
|
static const bool mut = mp11::mp_if
|
<
|
std::is_same<IsMutable, use_default>,
|
iterator_is_mutable<Iterator>,
|
IsMutable
|
>::value;
|
|
static bool const planar = mp11::mp_if
|
<
|
std::is_same<IsPlanar, use_default>,
|
is_planar<Iterator>,
|
IsPlanar
|
>::value;
|
|
static bool const step = mp11::mp_if
|
<
|
std::is_same<IsStep, use_default>,
|
iterator_is_step<Iterator>,
|
IsStep
|
>::type::value;
|
|
public:
|
using type = typename iterator_type<channel_t, layout_t, planar, step, mut>::type;
|
};
|
|
/// \brief Constructs an image view type from a source view type by changing some of the properties.
|
/// \ingroup TypeFactoryDerived
|
/// Use use_default for the properties of the source view that you want to keep
|
template <typename View, typename T = use_default, typename L = use_default, typename IsPlanar = use_default, typename StepX = use_default, typename IsMutable = use_default>
|
class derived_view_type
|
{
|
using channel_t = typename mp11::mp_if
|
<
|
std::is_same<T, use_default>,
|
typename channel_type<View>::type,
|
T
|
>;
|
|
using layout_t = typename mp11::mp_if
|
<
|
std::is_same<L, use_default>,
|
layout
|
<
|
typename color_space_type<View>::type,
|
typename channel_mapping_type<View>::type
|
>,
|
L
|
>;
|
|
static bool const mut = mp11::mp_if
|
<
|
std::is_same<IsMutable, use_default>,
|
view_is_mutable<View>,
|
IsMutable
|
>::value;
|
|
static bool const planar = mp11::mp_if
|
<
|
std::is_same<IsPlanar, use_default>,
|
is_planar<View>,
|
IsPlanar
|
>::value;
|
|
static bool const step = mp11::mp_if
|
<
|
std::is_same<StepX, use_default>,
|
view_is_step_in_x<View>,
|
StepX
|
>::value;
|
|
public:
|
using type = typename view_type<channel_t, layout_t, planar, step, mut>::type;
|
};
|
|
/// \brief Constructs a homogeneous image type from a source image type by changing some of the properties.
|
/// \ingroup TypeFactoryDerived
|
/// Use use_default for the properties of the source image that you want to keep
|
template <typename Image, typename T = use_default, typename L = use_default, typename IsPlanar = use_default>
|
class derived_image_type
|
{
|
using channel_t = typename mp11::mp_if
|
<
|
std::is_same<T, use_default>,
|
typename channel_type<Image>::type,
|
T
|
>::type;
|
|
using layout_t = typename mp11::mp_if
|
<
|
std::is_same<L, use_default>,
|
layout
|
<
|
typename color_space_type<Image>::type,
|
typename channel_mapping_type<Image>::type>,
|
L
|
>::type;
|
|
static bool const planar = mp11::mp_if
|
<
|
std::is_same<IsPlanar, use_default>,
|
is_planar<Image>,
|
IsPlanar
|
>::value;
|
|
public:
|
using type = typename image_type<channel_t, layout_t, planar>::type;
|
};
|
|
}} // namespace boost::gil
|
|
#endif
|
