png++  0.2.1
gray_pixel.hpp
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1 /*
2  * Copyright (C) 2007,2008 Alex Shulgin
3  *
4  * This file is part of png++ the C++ wrapper for libpng. PNG++ is free
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31 #ifndef PNGPP_GRAY_PIXEL_HPP_INCLUDED
32 #define PNGPP_GRAY_PIXEL_HPP_INCLUDED
33 
34 #include "types.hpp"
35 #include "packed_pixel.hpp"
36 #include "pixel_traits.hpp"
37 
38 namespace png
39 {
40 
44  typedef byte gray_pixel;
45 
50 
55  template< size_t bits >
57  : public packed_pixel< bits >
58  {
59  public:
61  : packed_pixel< bits >(value)
62  {
63  }
64  };
65 
70 
75 
80 
84  template<>
85  struct pixel_traits< gray_pixel >
86  : basic_pixel_traits< gray_pixel, byte, color_type_gray >
87  {
88  };
89 
93  template<>
94  struct pixel_traits< gray_pixel_16 >
95  : basic_pixel_traits< gray_pixel_16, uint_16, color_type_gray >
96  {
97  };
98 
102  template< size_t bits >
103  struct pixel_traits< packed_gray_pixel< bits > >
104  : basic_pixel_traits< packed_gray_pixel< bits >, byte,
105  color_type_gray, /* channels = */ 1, bits >
106  {
107  };
108 
109 } // namespace png
110 
111 #endif // PNGPP_GRAY_PIXEL_HPP_INCLUDED