Exiv2::Internal::Cr2Header Class Reference

Canon CR2 header structure. More...

#include <cr2image_int.hpp>

Inheritance diagram for Exiv2::Internal::Cr2Header:

Collaboration diagram for Exiv2::Internal::Cr2Header:

List of all members.

Public Member Functions
Creators
	Cr2Header (ByteOrder byteOrder=littleEndian)
	Default constructor.
	~Cr2Header ()
	Destructor.
Manipulators
bool	read (const byte *pData, uint32_t size)
	Read the image header from a data buffer. Return false if the data buffer does not contain an image header of the expected format, else true.
Accessors
DataBuf	write () const
	Return the image header in binary format. The caller owns this data and DataBuf ensures that it will be deleted.
bool	isImageTag (uint16_t tag, IfdId group, const PrimaryGroups *pPrimaryGroups) const
	Return true if the Exif tag from group is an image tag.
Static Public Member Functions
static uint32_t	offset2addr ()
	Return the address of offset2 from the start of the header.

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Detailed Description

Canon CR2 header structure.

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Member Function Documentation

bool Exiv2::Internal::Cr2Header::isImageTag	(	uint16_t	tag,
		IfdId	group,
		const PrimaryGroups *	pPrimaryGroups
	)		const [virtual]

Return true if the Exif tag from group is an image tag.

Certain tags of TIFF and TIFF-like images are required to correctly display the primary image. These image tags contain image data rather than metadata.

Parameters:

tag	Tag number.
group	Group identifier.
pPrimaryGroups	Pointer to a list of TIFF groups that contain primary images, empty if none are marked.

Returns:

The default implementation returns false.

Reimplemented from Exiv2::Internal::TiffHeaderBase.

References Exiv2::Internal::isTiffImageTag().

bool Exiv2::Internal::Cr2Header::read	(	const byte *	pData,
		uint32_t	size
	)		[virtual]

Read the image header from a data buffer. Return false if the data buffer does not contain an image header of the expected format, else true.

Parameters:

pData	Pointer to the data buffer.
size	Number of bytes in the data buffer.

Returns:

True if the TIFF header was read successfully. False if the data buffer does not contain a valid TIFF header.

Reimplemented from Exiv2::Internal::TiffHeaderBase.

References Exiv2::Internal::TiffHeaderBase::byteOrder(), Exiv2::getULong(), Exiv2::getUShort(), Exiv2::Internal::TiffHeaderBase::setByteOrder(), Exiv2::Internal::TiffHeaderBase::setOffset(), and Exiv2::Internal::TiffHeaderBase::tag().

DataBuf Exiv2::Internal::Cr2Header::write

(

)

const [virtual]

Return the image header in binary format. The caller owns this data and DataBuf ensures that it will be deleted.

Returns:

Binary header data.

Reimplemented from Exiv2::Internal::TiffHeaderBase.

References Exiv2::Internal::TiffHeaderBase::byteOrder(), Exiv2::DataBuf::pData_, Exiv2::Internal::TiffHeaderBase::tag(), Exiv2::ul2Data(), and Exiv2::us2Data().

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

• cr2image_int.hpp
• cr2image.cpp