00001 /* 00002 * Copyright (C) 2007,2008 Alex Shulgin 00003 * 00004 * This file is part of png++ the C++ wrapper for libpng. PNG++ is free 00005 * software; the exact copying conditions are as follows: 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions are met: 00009 * 00010 * 1. Redistributions of source code must retain the above copyright notice, 00011 * this list of conditions and the following disclaimer. 00012 * 00013 * 2. Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in the 00015 * documentation and/or other materials provided with the distribution. 00016 * 00017 * 3. The name of the author may not be used to endorse or promote products 00018 * derived from this software without specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 00021 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00022 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00023 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00024 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00025 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00026 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00027 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00028 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00029 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00030 */ 00031 #ifndef PNGPP_INDEX_PIXEL_HPP_INCLUDED 00032 #define PNGPP_INDEX_PIXEL_HPP_INCLUDED 00033 00034 #include "types.hpp" 00035 #include "packed_pixel.hpp" 00036 #include "pixel_traits.hpp" 00037 00038 namespace png 00039 { 00040 00044 class index_pixel 00045 { 00046 public: 00047 index_pixel(byte index = 0) 00048 : m_index(index) 00049 { 00050 } 00051 00052 operator byte() const 00053 { 00054 return m_index; 00055 } 00056 00057 private: 00058 byte m_index; 00059 }; 00060 00065 template< size_t bits > 00066 class packed_index_pixel 00067 : public packed_pixel< bits > 00068 { 00069 public: 00070 packed_index_pixel(byte value = 0) 00071 : packed_pixel< bits >(value) 00072 { 00073 } 00074 }; 00075 00079 typedef packed_index_pixel< 1 > index_pixel_1; 00080 00084 typedef packed_index_pixel< 2 > index_pixel_2; 00085 00089 typedef packed_index_pixel< 4 > index_pixel_4; 00090 00094 template<> 00095 struct pixel_traits< index_pixel > 00096 : basic_pixel_traits< index_pixel, byte, color_type_palette > 00097 { 00098 }; 00099 00103 template< size_t bits > 00104 struct pixel_traits< packed_index_pixel< bits > > 00105 : basic_pixel_traits< packed_index_pixel< bits >, byte, 00106 color_type_palette, /* channels = */ 1, bits > 00107 { 00108 }; 00109 00110 } // namespace png 00111 00112 #endif // PNGPP_INDEX_PIXEL_HPP_INCLUDED
1.7.1