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File indexing completed on 2026-01-08 09:49:22
0001 // 0002 // Copyright 2007-2008 Christian Henning 0003 // 0004 // Distributed under the Boost Software License, Version 1.0 0005 // See accompanying file LICENSE_1_0.txt or copy at 0006 // http://www.boost.org/LICENSE_1_0.txt 0007 // 0008 #ifndef BOOST_GIL_EXTENSION_IO_PNG_OLD_HPP 0009 #define BOOST_GIL_EXTENSION_IO_PNG_OLD_HPP 0010 0011 #include <boost/gil/extension/io/png.hpp> 0012 0013 namespace boost { namespace gil { 0014 0015 /// \ingroup PNG_IO 0016 /// \brief Returns the width and height of the PNG file at the specified location. 0017 /// Throws std::ios_base::failure if the location does not correspond to a valid PNG file 0018 template<typename String> 0019 inline point_t png_read_dimensions(String const& filename) 0020 { 0021 using backend_t = typename get_reader_backend<String, png_tag>::type; 0022 backend_t backend = read_image_info(filename, png_tag()); 0023 return { static_cast<std::ptrdiff_t>(backend._info._width), static_cast<std::ptrdiff_t>(backend._info._height) }; 0024 } 0025 0026 /// \ingroup PNG_IO 0027 /// \brief Loads the image specified by the given png image file name into the given view. 0028 /// Triggers a compile assert if the view color space and channel depth are not supported by the PNG library or by the I/O extension. 0029 /// Throws std::ios_base::failure if the file is not a valid PNG file, or if its color space or channel depth are not 0030 /// compatible with the ones specified by View, or if its dimensions don't match the ones of the view. 0031 template< typename String 0032 , typename View 0033 > 0034 inline 0035 void png_read_view( const String& filename 0036 , const View& view 0037 ) 0038 { 0039 read_view( filename 0040 , view 0041 , png_tag() 0042 ); 0043 } 0044 0045 /// \ingroup PNG_IO 0046 /// \brief Allocates a new image whose dimensions are determined by the given png image file, and loads the pixels into it. 0047 /// Triggers a compile assert if the image color space or channel depth are not supported by the PNG library or by the I/O extension. 0048 /// Throws std::ios_base::failure if the file is not a valid PNG file, or if its color space or channel depth are not 0049 /// compatible with the ones specified by Image 0050 template< typename String 0051 , typename Image 0052 > 0053 inline 0054 void png_read_image( const String& filename 0055 , Image& img 0056 ) 0057 { 0058 read_image( filename 0059 , img 0060 , png_tag() 0061 ); 0062 } 0063 0064 /// \ingroup PNG_IO 0065 /// \brief Loads the image specified by the given png image file name and color-converts it into the given view. 0066 /// Throws std::ios_base::failure if the file is not a valid PNG file, or if its dimensions don't match the ones of the view. 0067 template< typename String 0068 , typename View 0069 , typename CC 0070 > 0071 inline 0072 void png_read_and_convert_view( const String& filename 0073 , const View& view 0074 , CC cc 0075 ) 0076 { 0077 read_and_convert_view( filename 0078 , view 0079 , cc 0080 , png_tag() 0081 ); 0082 } 0083 0084 /// \ingroup PNG_IO 0085 /// \brief Loads the image specified by the given png image file name and color-converts it into the given view. 0086 /// Throws std::ios_base::failure if the file is not a valid PNG file, or if its dimensions don't match the ones of the view. 0087 template< typename String 0088 , typename View 0089 > 0090 inline 0091 void png_read_and_convert_view( const String& filename 0092 , const View& view 0093 ) 0094 { 0095 read_and_convert_view( filename 0096 , view 0097 , png_tag() 0098 ); 0099 } 0100 0101 /// \ingroup PNG_IO 0102 /// \brief Allocates a new image whose dimensions are determined by the given png image file, loads and color-converts the pixels into it. 0103 /// Throws std::ios_base::failure if the file is not a valid PNG file 0104 template< typename String 0105 , typename Image 0106 , typename CC 0107 > 0108 inline 0109 void png_read_and_convert_image( const String& filename 0110 , Image& img 0111 , CC cc 0112 ) 0113 { 0114 read_and_convert_image( filename 0115 , img 0116 , cc 0117 , png_tag() 0118 ); 0119 } 0120 0121 /// \ingroup PNG_IO 0122 /// \brief Allocates a new image whose dimensions are determined by the given png image file, loads and color-converts the pixels into it. 0123 /// Throws std::ios_base::failure if the file is not a valid PNG file 0124 template< typename String 0125 , typename Image 0126 > 0127 inline 0128 void png_read_and_convert_image( const String filename 0129 , Image& img 0130 ) 0131 { 0132 read_and_convert_image( filename 0133 , img 0134 , png_tag() 0135 ); 0136 } 0137 0138 /// \ingroup PNG_IO 0139 /// \brief Saves the view to a png file specified by the given png image file name. 0140 /// Triggers a compile assert if the view color space and channel depth are not supported by the PNG library or by the I/O extension. 0141 /// Throws std::ios_base::failure if it fails to create the file. 0142 template< typename String 0143 , typename View 0144 > 0145 inline 0146 void png_write_view( const String& filename 0147 , const View& view 0148 ) 0149 { 0150 write_view( filename 0151 , view 0152 , png_tag() 0153 ); 0154 } 0155 0156 } // namespace gil 0157 } // namespace boost 0158 0159 #endif
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