Gr::JpegReader Class Reference

A read interface for libjpeg. More...

#include <grjpeg.h>

Public Types
typedef Jpeg::Error	Error

Public Member Functions
	JpegReader (int scale=1, bool monochrome_out=false)
	Constructor.
	~JpegReader ()
	Destructor.
void	setup (int scale, bool monochrome_out=false)
	Sets the decoding scale factor. More...
void	decode (ImageData &out, const G::Path &in)
	Decodes a jpeg file into an image. Throws on error.
void	decode (ImageData &out, const char *p_in, size_t n)
	Decodes a jpeg buffer into an image. Throws on error.
void	decode (ImageData &out, const unsigned char *p_in, size_t n)
	Decodes a jpeg buffer into an image. Throws on error.
void	decode (ImageData &out, const ImageBuffer &)
	Decodes a jpeg buffer into an image. Throws on error.

Detailed Description

A read interface for libjpeg.

Definition at line 102 of file grjpeg.h.

Member Function Documentation

void Gr::JpegReader::setup	(	int	scale,
		bool	monochrome_out = false
	)

Sets the decoding scale factor.

In practice scale factors of 1, 2, 4 and 8 are supported directly by the jpeg library, and others scale factors are applied only after decoding are full scale.

Definition at line 535 of file grjpeg_jpeg.cpp.

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

• /home/graeme/videotools/src/grlib/grjpeg.h
• /home/graeme/videotools/src/grlib/grjpeg_jpeg.cpp
• /home/graeme/videotools/src/grlib/grjpeg_none.cpp