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File indexing completed on 2025-01-18 09:36:57
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_JPEG_OLD_HPP 0009 #define BOOST_GIL_EXTENSION_IO_JPEG_OLD_HPP 0010 0011 #include <boost/gil/extension/io/jpeg.hpp> 0012 0013 namespace boost { namespace gil { 0014 0015 /// \ingroup JPEG_IO 0016 /// \brief Returns the width and height of the JPEG file at the specified location. 0017 /// Throws std::ios_base::failure if the location does not correspond to a valid JPEG file 0018 template<typename String> 0019 inline point_t jpeg_read_dimensions(String const& filename) 0020 { 0021 using backend_t = typename get_reader_backend<String, jpeg_tag>::type; 0022 backend_t backend = read_image_info(filename, jpeg_tag()); 0023 return { backend._info._width, backend._info._height }; 0024 } 0025 0026 /// \ingroup JPEG_IO 0027 /// \brief Loads the image specified by the given jpeg 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 JPEG library or by the I/O extension. 0029 /// Throws std::ios_base::failure if the file is not a valid JPEG 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 jpeg_read_view( const String& filename 0036 , const View& view 0037 ) 0038 { 0039 read_view( filename 0040 , view 0041 , jpeg_tag() 0042 ); 0043 } 0044 0045 /// \ingroup JPEG_IO 0046 /// \brief Allocates a new image whose dimensions are determined by the given jpeg 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 JPEG library or by the I/O extension. 0048 /// Throws std::ios_base::failure if the file is not a valid JPEG 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 jpeg_read_image( const String& filename 0055 , Image& img 0056 ) 0057 { 0058 read_image( filename 0059 , img 0060 , jpeg_tag() 0061 ); 0062 } 0063 0064 /// \ingroup JPEG_IO 0065 /// \brief Loads and color-converts the image specified by the given jpeg image file name into the given view. 0066 /// Throws std::ios_base::failure if the file is not a valid JPEG 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 jpeg_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 , jpeg_tag() 0081 ); 0082 } 0083 0084 /// \ingroup JPEG_IO 0085 /// \brief Loads and color-converts the image specified by the given jpeg image file name into the given view. 0086 /// Throws std::ios_base::failure if the file is not a valid JPEG 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 jpeg_read_and_convert_view( const String& filename 0092 , const View& view 0093 ) 0094 { 0095 read_and_convert_view( filename 0096 , view 0097 , jpeg_tag() 0098 ); 0099 } 0100 0101 /// \ingroup JPEG_IO 0102 /// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, loads and color-converts the pixels into it. 0103 /// Throws std::ios_base::failure if the file is not a valid JPEG file 0104 template< typename String 0105 , typename Image 0106 , typename CC 0107 > 0108 inline 0109 void jpeg_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 , jpeg_tag() 0118 ); 0119 } 0120 0121 /// \ingroup JPEG_IO 0122 /// \brief Allocates a new image whose dimensions are determined by the given jpeg image file, loads and color-converts the pixels into it. 0123 /// Throws std::ios_base::failure if the file is not a valid JPEG file 0124 template< typename String 0125 , typename Image 0126 > 0127 inline 0128 void jpeg_read_and_convert_image( const String filename 0129 , Image& img 0130 ) 0131 { 0132 read_and_convert_image( filename 0133 , img 0134 , jpeg_tag() 0135 ); 0136 } 0137 0138 0139 /// \ingroup JPEG_IO 0140 /// \brief Saves the view to a jpeg file specified by the given jpeg image file name. 0141 /// Triggers a compile assert if the view color space and channel depth are not supported by the JPEG library or by the I/O extension. 0142 /// Throws std::ios_base::failure if it fails to create the file. 0143 template< typename String 0144 , typename View 0145 > 0146 inline 0147 void jpeg_write_view( const String& filename 0148 , const View& view 0149 , int quality = jpeg_quality::default_value 0150 ) 0151 { 0152 write_view( filename 0153 , view 0154 , image_write_info< jpeg_tag >( quality ) 0155 ); 0156 } 0157 0158 } // namespace gil 0159 } // namespace boost 0160 0161 #endif
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