113 lines
3.3 KiB
C++
113 lines
3.3 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_INDEX_PIXEL_HPP_INCLUDED
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#define PNGPP_INDEX_PIXEL_HPP_INCLUDED
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#include "types.hpp"
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#include "packed_pixel.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 The 8-bit Indexed (colormap) pixel type.
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*/
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class index_pixel
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{
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public:
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index_pixel(byte index = 0)
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: m_index(index)
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{
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}
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operator byte() const
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{
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return m_index;
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}
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private:
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byte m_index;
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};
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/**
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* \brief The packed indexed pixel class template. The available
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* specializations are for 1-, 2- and 4-bit pixels.
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*/
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template< int bits >
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class packed_index_pixel
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: public packed_pixel< bits >
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{
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public:
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packed_index_pixel(byte value = 0)
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: packed_pixel< bits >(value)
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{
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}
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};
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/**
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* \brief The 1-bit Indexed pixel type.
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*/
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typedef packed_index_pixel< 1 > index_pixel_1;
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/**
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* \brief The 1-bit Indexed pixel type.
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*/
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typedef packed_index_pixel< 2 > index_pixel_2;
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/**
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* \brief The 1-bit Indexed pixel type.
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*/
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typedef packed_index_pixel< 4 > index_pixel_4;
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/**
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* \brief Pixel traits specialization for index_pixel.
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*/
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template<>
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struct pixel_traits< index_pixel >
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: basic_pixel_traits< index_pixel, byte, color_type_palette >
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{
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};
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/**
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* \brief Pixel traits specialization for packed_index_pixel.
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*/
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template< int bits >
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struct pixel_traits< packed_index_pixel< bits > >
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: basic_pixel_traits< packed_index_pixel< bits >, byte,
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color_type_palette, /* channels = */ 1, bits >
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{
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};
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} // namespace png
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#endif // PNGPP_INDEX_PIXEL_HPP_INCLUDED
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