png++: ga_pixel.hpp Source File

png++ 0.2.10

ga_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
5 * software; the exact copying conditions are as follows:
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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30 */
31#ifndef PNGPP_GA_PIXEL_HPP_INCLUDED
32#define PNGPP_GA_PIXEL_HPP_INCLUDED
33
34#include <limits>
35
36#include "types.hpp"
37#include "pixel_traits.hpp"
38
39namespace png
40{
41
45 template< typename T >
46 struct basic_ga_pixel
47 {
48 typedef pixel_traits< basic_ga_pixel< T > > traits;
49
55 basic_ga_pixel(T value = 0, T alpha = traits::get_alpha_filler())
56 : value(value), alpha(alpha)
57 {
58 }
59
60 T value;
61 T alpha;
62 };
63
67 typedef basic_ga_pixel< byte > ga_pixel;
68
72 typedef basic_ga_pixel< uint_16 > ga_pixel_16;
73
77 template< typename T >
78 struct pixel_traits< basic_ga_pixel< T > >
79 : basic_pixel_traits< basic_ga_pixel< T >, T, color_type_ga >,
80 basic_alpha_pixel_traits< T >
81 {
82 };
83
84} // namespace png
85
86#endif // PNGPP_GA_PIXEL_HPP_INCLUDED
png
Definition color.hpp:37
png::ga_pixel
basic_ga_pixel< byte > ga_pixel
The 8-bit Gray+Alpha pixel type.
Definition ga_pixel.hpp:67
png::ga_pixel_16
basic_ga_pixel< uint_16 > ga_pixel_16
The 16-bit Gray+Alpha pixel type.
Definition ga_pixel.hpp:72
pixel_traits.hpp
png::basic_alpha_pixel_traits
Basic pixel traits class template for pixels with alpha channel.
Definition pixel_traits.hpp:90
png::basic_alpha_pixel_traits< T >::get_alpha_filler
static T get_alpha_filler()
Definition pixel_traits.hpp:95
png::basic_ga_pixel< byte >
png::basic_ga_pixel< byte >::value
byte value
Definition ga_pixel.hpp:60
png::basic_ga_pixel< byte >::alpha
byte alpha
Definition ga_pixel.hpp:61
png::basic_ga_pixel::basic_ga_pixel
basic_ga_pixel(T value=0, T alpha=traits::get_alpha_filler())
Constructs basic_ga_pixel object from value and alpha components passed as parameters....
Definition ga_pixel.hpp:55
png::basic_ga_pixel::traits
pixel_traits< basic_ga_pixel< T > > traits
Definition ga_pixel.hpp:48
png::basic_pixel_traits
Basic pixel traits class template.
Definition pixel_traits.hpp:62
png::pixel_traits
Pixel traits class template.
Definition pixel_traits.hpp:48
types.hpp