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Gr::JpegInfo Class Reference

Provides some basic information about a jpeg image without full decoding. More...

#include <grjpeg.h>

Public Member Functions

 JpegInfo (const unsigned char *p, size_t)
 Constructor. More...
 
 JpegInfo (const char *p, size_t)
 Constructor overload for char.
 
 JpegInfo (std::istream &)
 Constructor overload for an istream.
 
bool valid () const
 Returns true if constructed successfully.
 
int dx () const
 Returns the image width.
 
int dy () const
 Returns the image height.
 
int channels () const
 Returns the number of channels (eg. 3).
 

Detailed Description

Provides some basic information about a jpeg image without full decoding.

Definition at line 63 of file grjpeg.h.

Constructor & Destructor Documentation

Gr::JpegInfo::JpegInfo ( const unsigned char *  p,
size_t  n 
)

Constructor.

This requires the whole file contents because the relevant SOF chunk can be anywhere, so prefer the istream interface.

Definition at line 151 of file grjpeg.cpp.

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