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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
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PNGPP_GRAY_PIXEL_HPP_INCLUDED
#define PNGPP_GRAY_PIXEL_HPP_INCLUDED
#include "types.hpp"
#include "packed_pixel.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief The 8-bit Grayscale pixel type.
*/
typedef byte gray_pixel;
/**
* \brief The 16-bit Grayscale pixel type.
*/
typedef uint_16 gray_pixel_16;
/**
* \brief The packed gray pixel class template. The available
* specializations are for 1-, 2- and 4-bit pixels.
*/
template< size_t bits >
class packed_gray_pixel
: public packed_pixel< bits >
{
public:
packed_gray_pixel(byte value = 0)
: packed_pixel< bits >(value)
{
}
};
/**
* \brief The 1-bit Grayscale pixel type.
*/
typedef packed_gray_pixel< 1 > gray_pixel_1;
/**
* \brief The 2-bit Grayscale pixel type.
*/
typedef packed_gray_pixel< 2 > gray_pixel_2;
/**
* \brief The 4-bit Grayscale pixel type.
*/
typedef packed_gray_pixel< 4 > gray_pixel_4;
/**
* \brief Pixel traits specialization for gray_pixel.
*/
template<>
struct pixel_traits< gray_pixel >
: basic_pixel_traits< gray_pixel, byte, color_type_gray >
{
};
/**
* \brief Pixel traits specialization for gray_pixel_16.
*/
template<>
struct pixel_traits< gray_pixel_16 >
: basic_pixel_traits< gray_pixel_16, uint_16, color_type_gray >
{
};
/**
* \brief Pixel traits specialization for packed_gray_pixel.
*/
template< size_t bits >
struct pixel_traits< packed_gray_pixel< bits > >
: basic_pixel_traits< packed_gray_pixel< bits >, byte,
color_type_gray, /* channels = */ 1, bits >
{
};
} // namespace png
#endif // PNGPP_GRAY_PIXEL_HPP_INCLUDED
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