ga_pixel.hpp
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/*
* Copyright (C) 2007,2008 Alex Shulgin
*
* This file is part of png++ the C++ wrapper for libpng. PNG++ is free
* software; the exact copying conditions are as follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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*/
#ifndef PNGPP_GA_PIXEL_HPP_INCLUDED
#define PNGPP_GA_PIXEL_HPP_INCLUDED
#include <limits>
#include "types.hpp"
#include "pixel_traits.hpp"
namespace png
{
template< typename T >
struct basic_ga_pixel
{
typedef pixel_traits< basic_ga_pixel< T > > traits;
basic_ga_pixel(T value = 0, T alpha = traits::get_alpha_filler())
: value(value), alpha(alpha)
{
}
T value;
T alpha;
};
typedef basic_ga_pixel< byte > ga_pixel;
typedef basic_ga_pixel< uint_16 > ga_pixel_16;
template< typename T >
struct pixel_traits< basic_ga_pixel< T > >
: basic_pixel_traits< basic_ga_pixel< T >, T, color_type_ga >,
basic_alpha_pixel_traits< T >
{
};
} // namespace png
#endif // PNGPP_GA_PIXEL_HPP_INCLUDED
png::reader
The PNG reader class template. This is the low-level reading interface–use image class or consumer cl...
Definition reader.hpp:67
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()
Returns the default alpha channel filler for full opacity.
Definition pixel_traits.hpp:95
png::basic_ga_pixel
Basic Gray+Alpha pixel type.
Definition ga_pixel.hpp:47
png::basic_ga_pixel::value
T value
Definition ga_pixel.hpp:60
png::basic_ga_pixel::alpha
T 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