png++
0.2.1
Main Page
Namespaces
Classes
Files
File List
pixel_traits.hpp
Go to the documentation of this file.
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
21
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
25
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
*/
31
#ifndef PNGPP_PIXEL_TRAITS_HPP_INCLUDED
32
#define PNGPP_PIXEL_TRAITS_HPP_INCLUDED
33
34
#include <limits>
35
#include "
types.hpp
"
36
37
namespace
png
38
{
39
48
template
<
typename
pixel >
struct
pixel_traits;
49
56
template
<
typename
pixel,
57
typename
component,
58
color_type
pixel_color_type,
59
size_t
channels =
sizeof
(pixel) /
sizeof
(component),
60
size_t
bit_depth = std::numeric_limits< component >::digits >
61
struct
basic_pixel_traits
62
{
63
typedef
pixel
pixel_type
;
64
typedef
component
component_type
;
65
66
static
color_type
get_color_type
()
67
{
68
return
pixel_color_type;
69
}
70
static
size_t
get_channels
()
71
{
72
return
channels;
73
}
74
static
size_t
get_bit_depth
()
75
{
76
return
bit_depth;
77
}
78
};
79
84
template
<
typename
component >
85
struct
basic_alpha_pixel_traits
86
{
91
static
component
get_alpha_filler
()
92
{
93
return
std::numeric_limits< component >::max();
94
}
95
};
96
97
}
// namespace png
98
99
#endif // PNGPP_PIXEL_TRAITS_HPP_INCLUDED
Generated on Wed Mar 26 2014 14:17:49 for png++ by
1.8.1.2