Boost GIL


metafunctions.hpp
1 //
2 // Copyright 2005-2007 Adobe Systems Incorporated
3 //
4 // Distributed under the Boost Software License, Version 1.0
5 // See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt
7 //
8 #ifndef BOOST_GIL_METAFUNCTIONS_HPP
9 #define BOOST_GIL_METAFUNCTIONS_HPP
10 
11 #include <boost/gil/channel.hpp>
12 #include <boost/gil/concepts.hpp>
13 
14 #include <boost/mpl/accumulate.hpp>
15 #include <boost/mpl/back.hpp>
16 #include <boost/mpl/bool.hpp>
17 #include <boost/mpl/if.hpp>
18 #include <boost/mpl/pop_back.hpp>
19 #include <boost/mpl/push_back.hpp>
20 #include <boost/mpl/transform.hpp>
21 #include <boost/mpl/vector.hpp>
22 #include <boost/mpl/vector_c.hpp>
23 #include <boost/type_traits.hpp>
24 
25 #include <iterator>
26 
27 namespace boost { namespace gil {
28 
29 // forward declarations
30 template <typename T, typename L> struct pixel;
31 template <typename BitField,typename ChannelRefVec,typename Layout> struct packed_pixel;
32 template <typename T, typename C> struct planar_pixel_reference;
33 template <typename IC, typename C> struct planar_pixel_iterator;
34 template <typename I> class memory_based_step_iterator;
35 template <typename I> class memory_based_2d_locator;
36 template <typename L> class image_view;
37 template <typename Pixel, bool IsPlanar, typename Alloc> class image;
38 template <typename T> struct channel_type;
39 template <typename T> struct color_space_type;
40 template <typename T> struct channel_mapping_type;
41 template <typename It> struct is_iterator_adaptor;
42 template <typename It> struct iterator_adaptor_get_base;
43 template <typename BitField, typename ChannelBitSizes, typename Layout, bool IsMutable> struct bit_aligned_pixel_reference;
44 
51 
52 
59 
63 template <typename PixelRef> struct pixel_reference_is_basic : public mpl::false_ {};
64 template <typename T, typename L> struct pixel_reference_is_basic< pixel<T,L>&> : public mpl::true_ {};
65 template <typename T, typename L> struct pixel_reference_is_basic<const pixel<T,L>&> : public mpl::true_ {};
66 template <typename TR, typename Cs> struct pixel_reference_is_basic<planar_pixel_reference<TR,Cs> > : public mpl::true_ {};
67 template <typename TR, typename Cs> struct pixel_reference_is_basic<const planar_pixel_reference<TR,Cs> > : public mpl::true_ {};
68 
69 
73 template <typename Iterator>
74 struct iterator_is_basic : public mpl::false_ {};
75 template <typename T, typename L> // mutable interleaved
76 struct iterator_is_basic< pixel<T,L>* > : public mpl::true_ {};
77 template <typename T, typename L> // immutable interleaved
78 struct iterator_is_basic<const pixel<T,L>* > : public mpl::true_ {};
79 template <typename T, typename Cs> // mutable planar
80 struct iterator_is_basic<planar_pixel_iterator< T*,Cs> > : public mpl::true_ {};
81 template <typename T, typename Cs> // immutable planar
82 struct iterator_is_basic<planar_pixel_iterator<const T*,Cs> > : public mpl::true_ {};
83 template <typename T, typename L> // mutable interleaved step
84 struct iterator_is_basic<memory_based_step_iterator< pixel<T,L>*> > : public mpl::true_ {};
85 template <typename T, typename L> // immutable interleaved step
86 struct iterator_is_basic<memory_based_step_iterator<const pixel<T,L>*> > : public mpl::true_ {};
87 template <typename T, typename Cs> // mutable planar step
88 struct iterator_is_basic<memory_based_step_iterator<planar_pixel_iterator< T*,Cs> > > : public mpl::true_ {};
89 template <typename T, typename Cs> // immutable planar step
90 struct iterator_is_basic<memory_based_step_iterator<planar_pixel_iterator<const T*,Cs> > > : public mpl::true_ {};
91 
92 
95 template <typename Loc> struct locator_is_basic : public mpl::false_ {};
96 template <typename Iterator> struct locator_is_basic<memory_based_2d_locator<memory_based_step_iterator<Iterator> > > : public iterator_is_basic<Iterator> {};
97 
100 template <typename View> struct view_is_basic : public mpl::false_ {};
101 template <typename Loc> struct view_is_basic<image_view<Loc> > : public locator_is_basic<Loc> {};
102 
105 template <typename Img> struct image_is_basic : public mpl::false_ {};
106 template <typename Pixel, bool IsPlanar, typename Alloc> struct image_is_basic<image<Pixel,IsPlanar,Alloc> > : public mpl::true_ {};
107 
108 
112 
113 template <typename I> struct iterator_is_step;
114 namespace detail {
115  template <typename It, bool IsBase, bool EqualsStepType> struct iterator_is_step_impl;
116  // iterator that has the same type as its dynamic_x_step_type must be a step iterator
117  template <typename It, bool IsBase> struct iterator_is_step_impl<It,IsBase,true> : public mpl::true_{};
118 
119  // base iterator can never be a step iterator
120  template <typename It> struct iterator_is_step_impl<It,true,false> : public mpl::false_{};
121 
122  // for an iterator adaptor, see if its base is step
123  template <typename It> struct iterator_is_step_impl<It,false,false>
124  : public iterator_is_step<typename iterator_adaptor_get_base<It>::type>{};
125 }
126 
129 template <typename I> struct iterator_is_step
130  : public detail::iterator_is_step_impl<I,
131  !is_iterator_adaptor<I>::type::value,
132  is_same<I,typename dynamic_x_step_type<I>::type>::value >{};
133 
136 template <typename L> struct locator_is_step_in_x : public iterator_is_step<typename L::x_iterator> {};
137 
140 template <typename L> struct locator_is_step_in_y : public iterator_is_step<typename L::y_iterator> {};
141 
144 template <typename V> struct view_is_step_in_x : public locator_is_step_in_x<typename V::xy_locator> {};
145 
148 template <typename V> struct view_is_step_in_y : public locator_is_step_in_y<typename V::xy_locator> {};
149 
152 template <typename PixelReference>
154  : public mpl::not_<is_same<typename remove_const_and_reference<PixelReference>::type,
155  typename remove_const_and_reference<PixelReference>::type::value_type> > {};
156 
159 template <typename Pixel>
160 struct pixel_is_reference : public mpl::or_<is_reference<Pixel>, pixel_reference_is_proxy<Pixel> > {};
161 
165 
170 template <typename R> struct pixel_reference_is_mutable : public mpl::bool_<remove_reference<R>::type::is_mutable> {};
171 template <typename R> struct pixel_reference_is_mutable<const R&>
172  : public mpl::and_<pixel_reference_is_proxy<R>, pixel_reference_is_mutable<R> > {};
173 
176 template <typename L> struct locator_is_mutable : public iterator_is_mutable<typename L::x_iterator> {};
179 template <typename V> struct view_is_mutable : public iterator_is_mutable<typename V::x_iterator> {};
180 
181 
188 
192 
196 
200 
203 template <typename T, typename L, bool IsPlanar=false, bool IsMutable=true> struct pixel_reference_type{};
204 template <typename T, typename L> struct pixel_reference_type<T,L,false,true > { typedef pixel<T,L>& type; };
205 template <typename T, typename L> struct pixel_reference_type<T,L,false,false> { typedef const pixel<T,L>& type; };
206 template <typename T, typename L> struct pixel_reference_type<T,L,true,true> { typedef const planar_pixel_reference<typename channel_traits<T>::reference,typename color_space_type<L>::type> type; }; // TODO: Assert M=identity
207 template <typename T, typename L> struct pixel_reference_type<T,L,true,false> { typedef const planar_pixel_reference<typename channel_traits<T>::const_reference,typename color_space_type<L>::type> type; };// TODO: Assert M=identity
208 
211 template <typename Pixel, bool IsPlanar=false, bool IsStep=false, bool IsMutable=true> struct iterator_type_from_pixel{};
212 template <typename Pixel> struct iterator_type_from_pixel<Pixel,false,false,true > { typedef Pixel* type; };
213 template <typename Pixel> struct iterator_type_from_pixel<Pixel,false,false,false> { typedef const Pixel* type; };
214 template <typename Pixel> struct iterator_type_from_pixel<Pixel,true,false,true> {
215  typedef planar_pixel_iterator<typename channel_traits<typename channel_type<Pixel>::type>::pointer,typename color_space_type<Pixel>::type> type;
216 };
217 template <typename Pixel> struct iterator_type_from_pixel<Pixel,true,false,false> {
218  typedef planar_pixel_iterator<typename channel_traits<typename channel_type<Pixel>::type>::const_pointer,typename color_space_type<Pixel>::type> type;
219 };
220 template <typename Pixel, bool IsPlanar, bool IsMutable> struct iterator_type_from_pixel<Pixel,IsPlanar,true,IsMutable> {
221  typedef memory_based_step_iterator<typename iterator_type_from_pixel<Pixel,IsPlanar,false,IsMutable>::type> type;
222 };
223 
226 template <typename T, typename L, bool IsPlanar=false, bool IsStep=false, bool IsMutable=true> struct iterator_type{};
227 template <typename T, typename L> struct iterator_type<T,L,false,false,true > { typedef pixel<T,L>* type; };
228 template <typename T, typename L> struct iterator_type<T,L,false,false,false> { typedef const pixel<T,L>* type; };
229 template <typename T, typename L> struct iterator_type<T,L,true,false,true> { typedef planar_pixel_iterator<T*,typename L::color_space_t> type; }; // TODO: Assert M=identity
230 template <typename T, typename L> struct iterator_type<T,L,true,false,false> { typedef planar_pixel_iterator<const T*,typename L::color_space_t> type; }; // TODO: Assert M=identity
231 template <typename T, typename L, bool IsPlanar, bool IsMutable> struct iterator_type<T,L,IsPlanar,true,IsMutable> {
232  typedef memory_based_step_iterator<typename iterator_type<T,L,IsPlanar,false,IsMutable>::type> type;
233 };
234 
237 template <typename XIterator>
242 };
243 
244 namespace detail {
245  template <typename BitField, typename FirstBit, typename NumBits>
246  struct packed_channel_reference_type {
247  typedef const packed_channel_reference<BitField,FirstBit::value,NumBits::value,true> type;
248  };
249 
250  template <typename BitField, typename ChannelBitSizesVector>
251  class packed_channel_references_vector_type {
252  // If ChannelBitSizesVector is mpl::vector<int,7,7,2>
253  // Then first_bits_vector will be mpl::vector<int,0,7,14,16>
254  typedef typename mpl::accumulate<ChannelBitSizesVector, mpl::vector1<mpl::int_<0> >,
255  mpl::push_back<mpl::_1, mpl::plus<mpl::back<mpl::_1>, mpl::_2> > >::type first_bits_vector;
256  public:
257  typedef typename mpl::transform<typename mpl::pop_back<first_bits_vector>::type, ChannelBitSizesVector,
258  packed_channel_reference_type<BitField, mpl::_1,mpl::_2> >::type type;
259  };
260 
261 }
262 
271 template <typename BitField, typename ChannelBitSizeVector, typename Layout>
274 };
275 
284 
287 template <typename BitField, typename ChannelBitSizeVector, typename Layout, typename Alloc=std::allocator<unsigned char> >
290 };
291 
294 template <typename BitField, unsigned Size1, typename Layout, typename Alloc=std::allocator<unsigned char> >
295 struct packed_image1_type : public packed_image_type<BitField, mpl::vector1_c<unsigned, Size1>, Layout, Alloc> {};
296 
299 template <typename BitField, unsigned Size1, unsigned Size2, typename Layout, typename Alloc=std::allocator<unsigned char> >
300 struct packed_image2_type : public packed_image_type<BitField, mpl::vector2_c<unsigned, Size1, Size2>, Layout, Alloc> {};
301 
304 template <typename BitField, unsigned Size1, unsigned Size2, unsigned Size3, typename Layout, typename Alloc=std::allocator<unsigned char> >
305 struct packed_image3_type : public packed_image_type<BitField, mpl::vector3_c<unsigned, Size1, Size2, Size3>, Layout, Alloc> {};
306 
309 template <typename BitField, unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, typename Layout, typename Alloc=std::allocator<unsigned char> >
310 struct packed_image4_type : public packed_image_type<BitField, mpl::vector4_c<unsigned, Size1, Size2, Size3, Size4>, Layout, Alloc> {};
311 
314 template <typename BitField, unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, unsigned Size5, typename Layout, typename Alloc=std::allocator<unsigned char> >
315 struct packed_image5_type : public packed_image_type<BitField, mpl::vector5_c<unsigned, Size1, Size2, Size3, Size4, Size5>, Layout, Alloc> {};
316 
317 
323 
324 template <typename ChannelBitSizeVector, typename Layout, typename Alloc=std::allocator<unsigned char> >
326 private:
327  BOOST_STATIC_CONSTANT(int, bit_size = (mpl::accumulate<ChannelBitSizeVector, mpl::int_<0>, mpl::plus<mpl::_1, mpl::_2> >::type::value));
328  typedef typename detail::min_fast_uint<bit_size+7>::type bitfield_t;
330 public:
332 };
333 
336 template <unsigned Size1, typename Layout, typename Alloc=std::allocator<unsigned char> >
337 struct bit_aligned_image1_type : public bit_aligned_image_type<mpl::vector1_c<unsigned, Size1>, Layout, Alloc> {};
338 
341 template <unsigned Size1, unsigned Size2, typename Layout, typename Alloc=std::allocator<unsigned char> >
342 struct bit_aligned_image2_type : public bit_aligned_image_type<mpl::vector2_c<unsigned, Size1, Size2>, Layout, Alloc> {};
343 
346 template <unsigned Size1, unsigned Size2, unsigned Size3, typename Layout, typename Alloc=std::allocator<unsigned char> >
347 struct bit_aligned_image3_type : public bit_aligned_image_type<mpl::vector3_c<unsigned, Size1, Size2, Size3>, Layout, Alloc> {};
348 
351 template <unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, typename Layout, typename Alloc=std::allocator<unsigned char> >
352 struct bit_aligned_image4_type : public bit_aligned_image_type<mpl::vector4_c<unsigned, Size1, Size2, Size3, Size4>, Layout, Alloc> {};
353 
356 template <unsigned Size1, unsigned Size2, unsigned Size3, unsigned Size4, unsigned Size5, typename Layout, typename Alloc=std::allocator<unsigned char> >
357 struct bit_aligned_image5_type : public bit_aligned_image_type<mpl::vector5_c<unsigned, Size1, Size2, Size3, Size4, Size5>, Layout, Alloc> {};
358 
359 
360 
363 template <typename Channel, typename Layout>
365  typedef pixel<Channel,Layout> type; // by default use gil::pixel. Specializations are provided for
366 };
367 
368 // Specializations for packed channels
369 template <typename BitField, int NumBits, bool IsMutable, typename Layout>
370 struct pixel_value_type< packed_dynamic_channel_reference<BitField,NumBits,IsMutable>,Layout> :
371  public packed_pixel_type<BitField, mpl::vector1_c<unsigned,NumBits>, Layout> {};
372 template <typename BitField, int NumBits, bool IsMutable, typename Layout>
373 struct pixel_value_type<const packed_dynamic_channel_reference<BitField,NumBits,IsMutable>,Layout> :
374  public packed_pixel_type<BitField, mpl::vector1_c<unsigned,NumBits>, Layout> {};
375 
376 template <typename BitField, int FirstBit, int NumBits, bool IsMutable, typename Layout>
377 struct pixel_value_type< packed_channel_reference<BitField,FirstBit,NumBits,IsMutable>,Layout> :
378  public packed_pixel_type<BitField, mpl::vector1_c<unsigned,NumBits>, Layout> {};
379 template <typename BitField, int FirstBit, int NumBits, bool IsMutable, typename Layout>
380 struct pixel_value_type<const packed_channel_reference<BitField,FirstBit,NumBits,IsMutable>,Layout> :
381  public packed_pixel_type<BitField, mpl::vector1_c<unsigned,NumBits>, Layout> {};
382 
383 template <int NumBits, typename Layout>
384 struct pixel_value_type<packed_channel_value<NumBits>,Layout> :
385  public packed_pixel_type<typename detail::min_fast_uint<NumBits>::type, mpl::vector1_c<unsigned,NumBits>, Layout> {};
386 
387 
390 template <typename T, typename L, bool IsPlanar=false, bool IsStepX=false, bool IsMutable=true>
391 struct locator_type {
393 };
394 
397 template <typename T, typename L, bool IsPlanar=false, bool IsStepX=false, bool IsMutable=true>
398 struct view_type {
400 };
401 
404 template <typename T, typename L, bool IsPlanar=false, typename Alloc=std::allocator<unsigned char> >
405 struct image_type {
406  typedef image<pixel<T,L>, IsPlanar, Alloc> type;
407 };
408 
411 template <typename Pixel, bool IsPlanar=false, bool IsStepX=false, bool IsMutable=true>
414 };
415 
416 
420 template <typename Ref, typename T=use_default, typename L=use_default, typename IsPlanar=use_default, typename IsMutable=use_default>
422  typedef typename remove_reference<Ref>::type pixel_t;
423  typedef typename mpl::if_<is_same<T, use_default>, typename channel_type<pixel_t>::type, T >::type channel_t;
424  typedef typename mpl::if_<is_same<L, use_default>,
425  layout<typename color_space_type<pixel_t>::type, typename channel_mapping_type<pixel_t>::type>, L>::type layout_t;
426  static const bool mut =mpl::if_<is_same<IsMutable,use_default>, pixel_reference_is_mutable<Ref>, IsMutable>::type::value;
427  static const bool planar=mpl::if_<is_same<IsPlanar,use_default>, is_planar<pixel_t>, IsPlanar>::type::value;
428 public:
430 };
431 
435 template <typename Iterator, typename T=use_default, typename L=use_default, typename IsPlanar=use_default, typename IsStep=use_default, typename IsMutable=use_default>
437  typedef typename mpl::if_<is_same<T ,use_default>, typename channel_type<Iterator>::type, T >::type channel_t;
438  typedef typename mpl::if_<is_same<L,use_default>,
439  layout<typename color_space_type<Iterator>::type, typename channel_mapping_type<Iterator>::type>, L>::type layout_t;
440 
441  static const bool mut =mpl::if_<is_same<IsMutable,use_default>, iterator_is_mutable<Iterator>, IsMutable>::type::value;
442  static const bool planar=mpl::if_<is_same<IsPlanar,use_default>, is_planar<Iterator>, IsPlanar>::type::value;
443  static const bool step =mpl::if_<is_same<IsStep ,use_default>, iterator_is_step<Iterator>, IsStep>::type::value;
444 public:
446 };
447 
451 template <typename View, typename T=use_default, typename L=use_default, typename IsPlanar=use_default, typename StepX=use_default, typename IsMutable=use_default>
453  typedef typename mpl::if_<is_same<T ,use_default>, typename channel_type<View>::type, T>::type channel_t;
454  typedef typename mpl::if_<is_same<L,use_default>,
455  layout<typename color_space_type<View>::type, typename channel_mapping_type<View>::type>, L>::type layout_t;
456  static const bool mut =mpl::if_<is_same<IsMutable,use_default>, view_is_mutable<View>, IsMutable>::type::value;
457  static const bool planar=mpl::if_<is_same<IsPlanar,use_default>, is_planar<View>, IsPlanar>::type::value;
458  static const bool step =mpl::if_<is_same<StepX ,use_default>, view_is_step_in_x<View>,StepX>::type::value;
459 public:
461 };
462 
466 template <typename Image, typename T=use_default, typename L=use_default, typename IsPlanar=use_default>
468  typedef typename mpl::if_<is_same<T ,use_default>, typename channel_type<Image>::type, T >::type channel_t;
469  typedef typename mpl::if_<is_same<L,use_default>,
470  layout<typename color_space_type<Image>::type, typename channel_mapping_type<Image>::type>, L>::type layout_t;
471  static const bool planar=mpl::if_<is_same<IsPlanar,use_default>, is_planar<Image>, IsPlanar>::type::value;
472 public:
474 };
475 
476 }} // namespace boost::gil
477 
478 #endif
metafunction predicate determining whether the given iterator is a plain one or an adaptor over anoth...
Definition: concepts.hpp:60
Returns the type of an interleaved packed image: an image whose channels may not be byte-aligned...
Definition: metafunctions.hpp:288
Determines whether the given pixel reference is a proxy class or a native C++ reference.
Definition: metafunctions.hpp:153
A reference proxy to a planar pixel. Models: HomogeneousColorBaseConcept, HomogeneousPixelConcept.
Definition: metafunctions.hpp:32
Returns the type of a homogeneous image given the channel type, layout, and whether it operates on pl...
Definition: metafunctions.hpp:405
Determines if the given locator has a horizontal step that could be set dynamically.
Definition: metafunctions.hpp:136
Returns the type of a homogeneous view given the channel type, layout, whether it operates on planar ...
Definition: metafunctions.hpp:398
A lightweight object that interprets memory as a 2D array of pixels. Models ImageViewConcept,PixelBasedConcept,HasDynamicXStepTypeConcept,HasDynamicYStepTypeConcept,HasTransposedTypeConcept.
Definition: image_view.hpp:50
returns the base iterator for a given iterator adaptor. Provide an specialization when introducing ne...
Definition: concepts.hpp:62
Returns the type of a single-channel image given its bitfield type, the bit size of its channel and i...
Definition: metafunctions.hpp:295
Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept, PixelValueConcept, HomogeneousPixelBasedConcept.
Definition: metafunctions.hpp:30
Returns the type of a homogeneous iterator given the channel type, layout, whether it operates on pla...
Definition: metafunctions.hpp:226
Returns the type of a four channel image given its bitfield type, the bit size of its channels and it...
Definition: metafunctions.hpp:310
Returns the type of a two channel image given its bitfield type, the bit size of its channels and its...
Definition: metafunctions.hpp:300
Returns the type of a five channel bit-aligned image given the bit size of its channels and its layou...
Definition: metafunctions.hpp:357
Heterogeneous pixel reference corresponding to non-byte-aligned bit range. Models ColorBaseConcept...
Definition: bit_aligned_pixel_reference.hpp:113
Constructs a pixel iterator type from a source pixel iterator type by changing some of the properties...
Definition: metafunctions.hpp:436
An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept, HomogeneousPixelBasedConcept, MemoryBasedIteratorConcept, HasDynamicXStepTypeConcept.
Definition: algorithm.hpp:34
Determines if a given pixel iterator is basic Basic iterators must use gil::pixel (if interleaved)...
Definition: metafunctions.hpp:74
Constructs a pixel reference type from a source pixel reference type by changing some of the properti...
Definition: metafunctions.hpp:421
Returns the type of a four channel bit-aligned image given the bit size of its channels and its layou...
Definition: metafunctions.hpp:352
Memory-based pixel locator. Models: PixelLocatorConcept,HasDynamicXStepTypeConcept,HasDynamicYStepTypeConcept,HasTransposedTypeConceptThe class takes a step iterator as a parameter. The step iterator provides navigation along the vertical axis while its base iterator provides horizontal navigation.
Definition: algorithm.hpp:38
Given a pixel iterator defining access to pixels along a row, returns the types of the corresponding ...
Definition: metafunctions.hpp:238
Basic images must use basic views and std::allocator.
Definition: metafunctions.hpp:105
Determines if the given pixel reference is mutable (i.e. its channels can be changed) ...
Definition: metafunctions.hpp:170
Determines if the given locator is mutable (i.e. its pixels can be changed)
Definition: metafunctions.hpp:176
Constructs a homogeneous image type from a source image type by changing some of the properties...
Definition: metafunctions.hpp:467
Represents a color space and ordering of channels in memory.
Definition: utilities.hpp:246
container interface over image view. Models ImageConcept, PixelBasedConcept
Definition: image.hpp:39
Determines if a given locator is basic. A basic locator is memory-based and has basic x_iterator and ...
Definition: metafunctions.hpp:95
Returns the type of a homogeneous pixel reference given the channel type, layout, whether it operates...
Definition: metafunctions.hpp:203
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.
Definition: metafunctions.hpp:325
Determines if the given view has a vertical step that could be set dynamically.
Definition: metafunctions.hpp:148
Determines if the given view is mutable (i.e. its pixels can be changed)
Definition: metafunctions.hpp:179
Definition: color_convert.hpp:30
Returns the type of a homogeneous pixel given the channel type and layout.
Definition: metafunctions.hpp:364
Returns the type of a homogeneous locator given the channel type, layout, whether it operates on plan...
Definition: metafunctions.hpp:391
Metafunction predicate returning whether the given iterator allows for changing its values...
Definition: concepts.hpp:59
Constructs an image view type from a source view type by changing some of the properties.Use use_default for the properties of the source view that you want to keep.
Definition: metafunctions.hpp:452
Returns the type of a packed pixel given its bitfield type, the bit size of its channels and its layo...
Definition: metafunctions.hpp:272
Heterogeneous pixel value whose channel references can be constructed from the pixel bitfield and the...
Definition: concepts.hpp:73
Given a model of a pixel, determines whether the model represents a pixel reference (as opposed to pi...
Definition: metafunctions.hpp:160
Returns the type of a single-channel bit-aligned image given the bit size of its channel and its layo...
Definition: metafunctions.hpp:337
Determines if a given pixel reference is basic Basic references must use gil::pixel& (if interleaved)...
Definition: metafunctions.hpp:63
Returns the type of a three channel image given its bitfield type, the bit size of its channels and i...
Definition: metafunctions.hpp:305
Determines if the given locator has a vertical step that could be set dynamically.
Definition: metafunctions.hpp:140
Basic views must be over basic locators.
Definition: metafunctions.hpp:100
Determines if the given iterator has a step that could be set dynamically.
Definition: metafunctions.hpp:113
Returns the type of a two channel bit-aligned image given the bit size of its channels and its layout...
Definition: metafunctions.hpp:342
Returns the type of a pixel iterator given the pixel type, whether it operates on planar data...
Definition: metafunctions.hpp:211
Returns the type of a view the pixel type, whether it operates on planar data and whether it has a st...
Definition: metafunctions.hpp:412
MEMORY-BASED STEP ITERATOR.
Definition: algorithm.hpp:36
Returns the type of a three channel bit-aligned image given the bit size of its channels and its layo...
Definition: metafunctions.hpp:347
Determines if the given view has a horizontal step that could be set dynamically. ...
Definition: metafunctions.hpp:144
Returns the type of a five channel image given its bitfield type, the bit size of its channels and it...
Definition: metafunctions.hpp:315