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Exiv2
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Exiv2
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This class models a TIFF sub-directory (sub-IFD). A sub-IFD is an entry with one or more values that are pointers to IFD structures containing an IFD. The TIFF standard defines some important tags to be sub-IFDs, including the Exif and GPS tags. More...
#include <tiffcomposite_int.hpp>
Public Member Functions | |
Creators | |
| TiffSubIfd (uint16_t tag, IfdId group, IfdId newGroup) | |
| Default constructor. | |
| virtual | ~TiffSubIfd () |
| Virtual destructor. | |
 Public Member Functions inherited from Exiv2::Internal::TiffEntryBase | |
| TiffEntryBase (uint16_t tag, IfdId group, TiffType tiffType=ttUndefined) | |
| Default constructor. | |
| virtual | ~TiffEntryBase () |
| Virtual destructor. | |
| void | encode (TiffEncoder &encoder, const Exifdatum *datum) |
| Encode a TIFF component from the metadatum provided and information from the encoder as needed. More... | |
| void | setOffset (int32_t offset) |
| Set the offset. | |
| void | setData (byte *pData, int32_t size) |
| Set pointer and size of the entry's data (not taking ownership of the data). | |
| void | setData (DataBuf buf) |
| Set the entry's data buffer, taking ownership of the data buffer passed in. | |
| void | updateValue (Value::AutoPtr value, ByteOrder byteOrder) |
| Update the value. Takes ownership of the pointer passed in. More... | |
| void | setValue (Value::AutoPtr value) |
| Set tag value. Takes ownership of the pointer passed in. More... | |
| TiffType | tiffType () const |
| Return the TIFF type. | |
| int32_t | offset () const |
| Return the offset to the data area relative to the base for the component (usually the start of the TIFF header) | |
| virtual int | idx () const |
| Return the unique id of the entry in the image. | |
| const byte * | pData () const |
| Return a pointer to the binary representation of the value of this component. | |
| const Value * | pValue () const |
| Return a const pointer to the converted value of this component. | |
| Public Member Functions inherited from Exiv2::Internal::TiffComponent | |
| TiffComponent (uint16_t tag, IfdId group) | |
| Constructor. | |
| virtual | ~TiffComponent () |
| Virtual destructor. | |
| TiffComponent * | addPath (uint16_t tag, TiffPath &tiffPath, TiffComponent *const pRoot, AutoPtr object=AutoPtr(0)) |
| Add a TIFF entry tag to the component. Components on the path to the entry are added if they don't exist yet. More... | |
| TiffComponent * | addChild (AutoPtr tiffComponent) |
| Add a child to the component. Default is to do nothing. More... | |
| TiffComponent * | addNext (AutoPtr tiffComponent) |
| Add a "next" component to the component. Default is to do nothing. More... | |
| void | accept (TiffVisitor &visitor) |
| Interface to accept visitors (Visitor pattern). Visitors can perform operations on all components of the composite. More... | |
| void | setStart (const byte *pStart) |
| Set a pointer to the start of the binary representation of the component in a memory buffer. The buffer must be allocated and freed outside of this class. | |
| uint32_t | write (IoWrapper &ioWrapper, ByteOrder byteOrder, int32_t offset, uint32_t valueIdx, uint32_t dataIdx, uint32_t &imageIdx) |
| Write a TiffComponent to a binary image. More... | |
| uint16_t | tag () const |
| Return the tag of this entry. | |
| IfdId | group () const |
| Return the group id of this component. | |
| byte * | start () const |
| Return a pointer to the start of the binary representation of the component. | |
| AutoPtr | clone () const |
| Return an auto-pointer to a copy of itself (deep copy, but without any children). The caller owns this copy and the auto-pointer ensures that it will be deleted. | |
| uint32_t | writeData (IoWrapper &ioWrapper, ByteOrder byteOrder, int32_t offset, uint32_t dataIdx, uint32_t &imageIdx) const |
| Write the IFD data of this component to a binary image. Return the number of bytes written. Components derived from TiffEntryBase implement this method if needed. | |
| uint32_t | writeImage (IoWrapper &ioWrapper, ByteOrder byteOrder) const |
| Write the image data of this component to a binary image. Return the number of bytes written. TIFF components implement this method if needed. | |
| uint32_t | size () const |
| Return the size in bytes of the IFD value of this component when written to a binary image. | |
| uint32_t | count () const |
| Return the number of components in this component. | |
| uint32_t | sizeData () const |
| Return the size in bytes of the IFD data of this component when written to a binary image. This is a support function for write(). Components derived from TiffEntryBase implement this method corresponding to their implementation of writeData(). | |
| uint32_t | sizeImage () const |
| Return the size in bytes of the image data of this component when written to a binary image. This is a support function for write(). TIFF components implement this method corresponding to their implementation of writeImage(). | |
Protected Member Functions | |
Protected Creators | |
| TiffSubIfd (const TiffSubIfd &rhs) | |
| Copy constructor (used to implement clone()). | |
Protected Manipulators | |
| virtual TiffComponent * | doAddPath (uint16_t tag, TiffPath &tiffPath, TiffComponent *const pRoot, TiffComponent::AutoPtr object) |
| Implements addPath(). The default implementation does nothing. | |
| virtual TiffComponent * | doAddChild (TiffComponent::AutoPtr tiffComponent) |
| Implements addChild(). The default implementation does nothing. | |
| virtual void | doAccept (TiffVisitor &visitor) |
| Implements accept(). | |
| virtual void | doEncode (TiffEncoder &encoder, const Exifdatum *datum) |
| Implements encode(). | |
| virtual uint32_t | doWrite (IoWrapper &ioWrapper, ByteOrder byteOrder, int32_t offset, uint32_t valueIdx, uint32_t dataIdx, uint32_t &imageIdx) |
| Implements write(). Write the sub-IFD pointers to the ioWrapper, return the number of bytes written. The valueIdx and imageIdx arguments are not used. | |
Protected Accessors | |
| virtual TiffSubIfd * | doClone () const |
| Internal virtual copy constructor, implements clone(). | |
| virtual uint32_t | doWriteData (IoWrapper &ioWrapper, ByteOrder byteOrder, int32_t offset, uint32_t dataIdx, uint32_t &imageIdx) const |
| Implements writeData(). Write the sub-IFDs to the ioWrapper. Return the number of bytes written. | |
| virtual uint32_t | doWriteImage (IoWrapper &ioWrapper, ByteOrder byteOrder) const |
| Implements writeImage(). Write the image data of each sub-IFD to the ioWrapper. Return the number of bytes written. | |
| uint32_t | doSize () const |
| Implements size(). Return the size of the sub-Ifd pointers. | |
| virtual uint32_t | doSizeData () const |
| Implements sizeData(). Return the sum of the sizes of all sub-IFDs. | |
| virtual uint32_t | doSizeImage () const |
| Implements sizeImage(). Return the sum of the image sizes of all sub-IFDs. | |
| Protected Member Functions inherited from Exiv2::Internal::TiffEntryBase | |
| TiffEntryBase (const TiffEntryBase &rhs) | |
| Copy constructor (used to implement clone()). | |
| void | setCount (uint32_t count) |
| Set the number of components in this entry. | |
| void | setIdx (int idx) |
| Set the unique id of the entry in the image. | |
| virtual uint32_t | doCount () const |
| Implements count(). | |
| Protected Member Functions inherited from Exiv2::Internal::TiffComponent | |
| virtual TiffComponent * | doAddNext (AutoPtr tiffComponent) |
| Implements addNext(). The default implementation does nothing. | |
Friends | |
| class | TiffReader |
Additional Inherited Members | |
| Public Types inherited from Exiv2::Internal::TiffComponent | |
| typedef std::auto_ptr< TiffComponent > | AutoPtr |
| TiffComponent auto_ptr type. | |
| typedef std::vector< TiffComponent * > | Components |
| Container type to hold all metadata. | |
| Static Protected Member Functions inherited from Exiv2::Internal::TiffEntryBase | |
| static uint32_t | writeOffset (byte *buf, int32_t offset, TiffType tiffType, ByteOrder byteOrder) |
| Helper function to write an offset to a preallocated binary buffer. | |
This class models a TIFF sub-directory (sub-IFD). A sub-IFD is an entry with one or more values that are pointers to IFD structures containing an IFD. The TIFF standard defines some important tags to be sub-IFDs, including the Exif and GPS tags.
1.8.14