JWDecompress Class Reference

Use JWDecompress to decompress an existing .jpg file to RGB image data. More...

#include <JWDecompress.hpp>

Inheritance diagram for JWDecompress:

Collaboration diagram for JWDecompress:

Public Member Functions
virtual JWDecompress &	decompress (void)
	Decompress the given data. More...
virtual std::string	get_filename (void) const
	The filename used for input (decompress) or output (compress) if set via set_file(). More...
virtual JWDecompress &	set_input_file (const std::string &filename)
	Set the jpeg input file. More...
virtual JWDecompress &	set_input_file (FILE *f)
	Set the jpeg input file. More...

Public Attributes
jpeg_decompress_struct	dinfo
	IJG's decompression structure. More...
jpeg_error_mgr	jerr
	IJG's structures and pointers to those structures used by derived classes. More...
jpeg_error_mgr *	jerr_ptr
	IJG's structures and pointers to those structures used by derived classes. More...
jpeg_compress_struct *	cinfo_ptr
	IJG's structures and pointers to those structures used by derived classes. More...
jpeg_decompress_struct *	dinfo_ptr
	IJG's structures and pointers to those structures used by derived classes. More...

Protected Member Functions
virtual JW &	set_file (const std::string &filename)
	Protected method to set the input or output file. More...
virtual JW &	set_file (FILE *f)

Protected Attributes
std::string	fname
	The filename used for input (decompress) or output (compress) if set via set_file(). More...
FILE *	file
	Input/output file. Used for output when compressing, and input when decompressing. More...

Detailed Description

Use JWDecompress to decompress an existing .jpg file to RGB image data.

Member Function Documentation

decompress()

JWDecompress & JWDecompress::decompress ( void  )

virtual

Decompress the given data.

get_filename()

virtual std::string JW::get_filename ( void  ) const

inlinevirtualinherited

The filename used for input (decompress) or output (compress) if set via set_file().

The only way to set the input or output file is to call JWCompress::set_output_file() or JWDecompress::set_input_file().

set_file() [1/2]

JW & JW::set_file ( const std::string &  filename )

protectedvirtualinherited

Protected method to set the input or output file.

Use the equivalent functions in the derived classes instead.

See also

JWCompress::set_output_file()

JWDecompress::set_input_file()

Exceptions

std::runtime_error

if the named file cannot be opened

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set_file() [2/2]

JW & JW::set_file ( FILE *  f )

protectedvirtualinherited

Exceptions

std::runtime_error

if the file pointer is null

set_input_file() [1/2]

virtual JWDecompress& JWDecompress::set_input_file ( const std::string &  filename )

inlinevirtual

Set the jpeg input file.

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set_input_file() [2/2]

virtual JWDecompress& JWDecompress::set_input_file ( FILE *  f )

inlinevirtual

Set the jpeg input file.

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Member Data Documentation

cinfo_ptr

jpeg_compress_struct* JW::cinfo_ptr

inherited

IJG's structures and pointers to those structures used by derived classes.

dinfo

jpeg_decompress_struct JWDecompress::dinfo

IJG's decompression structure.

See also

jpeglib.h

dinfo_ptr

jpeg_decompress_struct* JW::dinfo_ptr

inherited

IJG's structures and pointers to those structures used by derived classes.

file

FILE* JW::file

protectedinherited

Input/output file. Used for output when compressing, and input when decompressing.

fname

std::string JW::fname

protectedinherited

The filename used for input (decompress) or output (compress) if set via set_file().

See also

get_filename()

jerr

jpeg_error_mgr JW::jerr

inherited

IJG's structures and pointers to those structures used by derived classes.

jerr_ptr

jpeg_error_mgr* JW::jerr_ptr

inherited

IJG's structures and pointers to those structures used by derived classes.

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The documentation for this class was generated from the following files:

• src/JWDecompress.hpp
• src/JWDecompress.cpp