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87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*
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* Copyright (C) 2007,2008 Alex Shulgin
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*
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* This file is part of png++ the C++ wrapper for libpng. PNG++ is free
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* software; the exact copying conditions are as follows:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef PNGPP_GA_PIXEL_HPP_INCLUDED
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#define PNGPP_GA_PIXEL_HPP_INCLUDED
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#include <limits>
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#include "types.hpp"
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#include "pixel_traits.hpp"
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namespace png
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{
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/**
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* \brief Basic Gray+Alpha pixel type.
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*/
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template< typename T >
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struct basic_ga_pixel
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{
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typedef pixel_traits< basic_ga_pixel< T > > traits;
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/**
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* \brief Constructs basic_ga_pixel object from \a value and
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* \a alpha components passed as parameters. Alpha defaults
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* to full opacity.
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*/
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basic_ga_pixel(T value = 0, T alpha = traits::get_alpha_filler())
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: value(value), alpha(alpha)
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{
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}
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T value;
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T alpha;
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};
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/**
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* \brief The 8-bit Gray+Alpha pixel type.
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*/
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typedef basic_ga_pixel< byte > ga_pixel;
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/**
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* \brief The 16-bit Gray+Alpha pixel type.
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*/
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typedef basic_ga_pixel< uint_16 > ga_pixel_16;
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/**
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* \brief Pixel traits specialization for basic_ga_pixel.
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*/
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template< typename T >
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struct pixel_traits< basic_ga_pixel< T > >
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: basic_pixel_traits< basic_ga_pixel< T >, T, color_type_ga >,
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basic_alpha_pixel_traits< T >
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{
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};
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} // namespace png
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#endif // PNGPP_GA_PIXEL_HPP_INCLUDED
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