DD::Image::GenericImagePlane Class Reference

Class to wrap up an image plane of arbitrary type. This is used by the readers to return image data with the minimal amount of conversion needed. More...

Public Member Functions
	GenericImagePlane (const GenericImagePlaneDescriptor &desc)
	ctor, relying on our own allocation
	GenericImagePlane (const GenericImagePlaneDescriptor &desc, HandlePtr handle)
const GenericImagePlaneDescriptor &	desc () const
ptrdiff_t	rowStrideBytes () const
ptrdiff_t	colStrideBytes () const
ptrdiff_t	chanStrideBytes () const
template<class T >
const T &	at (int x, int y, int z) const
	Get a reference to the data at (x, y) with the channel number /z/.
template<class T >
T &	writableAt (int x, int y, int z)
	Get a reference to the data at (x, y) with the channel number /z/.
void	clearImage ()
	Clears the image by writing 0 into the entire buffer.

Protected Member Functions
void	SetStrides ()
const char *	address (int x, int y, int z) const
void	CheckType (unsigned char testVariable)
void	CheckType (unsigned short testVariable)
void	CheckType (unsigned int testVariable)
void	CheckType (half testVariable)
void	CheckType (float testVariable)

Protected Attributes
GenericImagePlaneDescriptor	_desc
HandlePtr	_handle
char *	_data
	base address of our image, kept as a char for address maths
ptrdiff_t	_rowStrideBytes
ptrdiff_t	_colStrideBytes
	The stride between columns in bytes.
ptrdiff_t	_chanStrideBytes
	The stride between channels in bytes.

Detailed Description

Class to wrap up an image plane of arbitrary type. This is used by the readers to return image data with the minimal amount of conversion needed.

TODO - refactor ImagePlane and it's floatingpoint refcounted thing to be compatible with this (via assigment and CC both ways, with checks for types being right).

Constructor & Destructor Documentation

DD::Image::GenericImagePlane::GenericImagePlane ( const GenericImagePlaneDescriptor &  desc, HandlePtr  handle  )

inline

Constructor using a specific chunk of memory in which we want the image data stored.

Note

Make sure the specified memory is large enough to hold the image plane described by the specified descriptor (bounds, bit depth and channel count).

References SetStrides().

Member Function Documentation

void DD::Image::GenericImagePlane::SetStrides ( )

inlineprotected

Helper function to calculate the various strides given the information in the GenericImagePlaneDescriptor member _desc, which must have been set before the call to SetStrides().

References _chanStrideBytes, _colStrideBytes, and _rowStrideBytes.

Referenced by GenericImagePlane().

void DD::Image::GenericImagePlane::CheckType ( unsigned char  testVariable )

inlineprotected

The various CheckType() functions are used to assert that the type on which at() or writableAt() have been templatised corresponds to the enumerated type of the descriptor's data info, which is determined at runtime.

Member Data Documentation

ptrdiff_t DD::Image::GenericImagePlane::_rowStrideBytes

protected

The stride between rows in bytes. This depends on the channel data type and the number of channels and/or image width, according to whether the image plane is packed or not (as specified by GenericImagePlaneDescriptor::_packed).

Referenced by SetStrides().