TIFF composite visitor to read the TIFF structure from a block of memory and build the composite from it (Visitor pattern). Used by TiffParser to read the TIFF data from a block of memory. More...

#include <tiffvisitor_int.hpp>

Inheritance diagram for Exiv2::Internal::TiffReader:

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Public Member Functions
Creators
	TiffReader (const byte pData, uint32_t size, TiffComponent pRoot, TiffRwState state)
	Constructor. The data buffer and table describing the TIFF structure of the data are set in the constructor. More...

virtual	~TiffReader ()
	Virtual destructor.

Manipulators
virtual void	visitEntry (TiffEntry *object)
	Read a TIFF entry from the data buffer.

virtual void	visitDataEntry (TiffDataEntry *object)
	Read a TIFF data entry from the data buffer.

virtual void	visitImageEntry (TiffImageEntry *object)
	Read a TIFF image entry from the data buffer.

virtual void	visitSizeEntry (TiffSizeEntry *object)
	Read a TIFF size entry from the data buffer.

virtual void	visitDirectory (TiffDirectory *object)
	Read a TIFF directory from the data buffer.

virtual void	visitSubIfd (TiffSubIfd *object)
	Read a TIFF sub-IFD from the data buffer.

virtual void	visitMnEntry (TiffMnEntry *object)
	Read a TIFF makernote entry from the data buffer.

virtual void	visitIfdMakernote (TiffIfdMakernote *object)
	Read an IFD makernote from the data buffer.

virtual void	visitIfdMakernoteEnd (TiffIfdMakernote *object)
	Reset reader to its original state, undo makernote specific settings.

virtual void	visitBinaryArray (TiffBinaryArray *object)
	Read a binary array from the data buffer.

virtual void	visitBinaryElement (TiffBinaryElement *object)
	Read an element of a binary array from the data buffer.

void	readTiffEntry (TiffEntryBase *object)
	Read a standard TIFF entry from the data buffer.

void	readDataEntryBase (TiffDataEntryBase *object)
	Read a TiffDataEntryBase from the data buffer.

void	setMnState (const TiffRwState *state=0)
	Set the state of the reader to one suitable for the Makernote. More...

void	setOrigState ()
	Set the state to the original state as set in the constructor.

bool	circularReference (const byte *start, IfdId group)
	Check IFD directory pointer start for circular reference.

int	nextIdx (IfdId group)
	Return the next idx sequence number for group.

void	postProcess ()
	Read deferred components. More...

Accessors
ByteOrder	byteOrder () const
	Return the byte order.

uint32_t	baseOffset () const
	Return the base offset. See class TiffRwState for details.

Public Member Functions inherited from Exiv2::Internal::TiffVisitor
	TiffVisitor ()
	Default constructor. Initialises all stop/go flags to true.

virtual	~TiffVisitor ()
	Virtual destructor.

void	setGo (GoEvent event, bool go)
	Set the stop/go flag: true for go, false for stop. More...

virtual void	visitDirectoryNext (TiffDirectory *object)
	Operation to perform for a TIFF directory, after all components and before the next entry is processed.

virtual void	visitDirectoryEnd (TiffDirectory *object)
	Operation to perform for a TIFF directory, at the end of the processing.

virtual void	visitBinaryArrayEnd (TiffBinaryArray *object)
	Operation to perform for a TIFF binary array, at the end of the processing.

bool	go (GoEvent event) const
	Check if stop flag for event is clear, return true if it's clear.

Additional Inherited Members
Public Types inherited from Exiv2::Internal::TiffVisitor
enum	GoEvent { geTraverse = 0, geKnownMakernote = 1 }
	Events for the stop/go flag. See setGo(). More...

Detailed Description

TIFF composite visitor to read the TIFF structure from a block of memory and build the composite from it (Visitor pattern). Used by TiffParser to read the TIFF data from a block of memory.

Constructor & Destructor Documentation

◆ TiffReader()

Exiv2::Internal::TiffReader::TiffReader	(	const byte *	pData,
		uint32_t	size,
		TiffComponent *	pRoot,
		TiffRwState	state
	)

Constructor. The data buffer and table describing the TIFF structure of the data are set in the constructor.

Parameters

pData	Pointer to the data buffer, starting with a TIFF header.
size	Number of bytes in the data buffer.
pRoot	Root element of the TIFF composite.
state	State object for creation function, byte order and base offset.

Member Function Documentation

◆ postProcess()

void Exiv2::Internal::TiffReader::postProcess ( )

Read deferred components.

This function is called after the TIFF composite is read by passing a TiffReader to the accept() function of the root component. It reads all components for which reading was deferred during that pass. This is usually done to make sure that all other components are accessible at the time the deferred components are processed.

References setMnState(), and setOrigState().

◆ setMnState()

void Exiv2::Internal::TiffReader::setMnState ( const TiffRwState * state = 0 )

Set the state of the reader to one suitable for the Makernote.

Uses the state passed in, if any, and remembers it for use during subsequent calls without any argument.

References Exiv2::Internal::TiffRwState::baseOffset(), and Exiv2::Internal::TiffRwState::byteOrder().

Referenced by postProcess(), and visitIfdMakernote().

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

tiffvisitor_int.hpp
tiffvisitor_int.cpp