DD::Image::GeneralTile Class Reference

Inheritance diagram for DD::Image::GeneralTile:

Public Member Functions
int	x () const
int	y () const
int	r () const
int	t () const
int	w () const
int	h () const
int	clampy (int y) const
int	clampx (int x) const
	operator const Box & () const
const DD::Image::Box &	box () const
const ChannelSet &	channels () const
bool	is_zero (Channel z, int y) const
bool	valid () const
	GeneralTile (Iop &input, const Box &box, const ChannelSet &chans, bool forceUnpacked=false, bool mt=false, InterestRatchet *ir=nullptr)
	~GeneralTile ()
float	at (int x, int y, Channel z)
bool	aborted () const
void	load_range (int y, int t)

Protected Member Functions
	GeneralTile (bool loadOnDemand, Iop &input, const Box &box, const ChannelSet &chans, bool forceUnpacked=false, bool mt=false, InterestRatchet *ir=nullptr)

Static Protected Member Functions
static Box	getRequestBox (Iop &input)

Protected Attributes
Iop &	_input
PlanarI *	_planarI
LocalPlaneCache *	_ipc
ChannelSet	_channels
Box	_box
RowCacheTile *	_rowCacheTile
bool	_ipcIsShared
bool	_valid
bool	_wantPacked
std::set< ChannelSet >	_allPlanes

Detailed Description

GeneralTile is a Tile-like API for access to image data, that can use both the traditional row-based Tile API and can access ImagePlane data

Unlike Interest/Tile this isn't a Box. Some Box methods are provided for source-compatibility, but it's probably best to use getBox() to get the box instead.

Constructor & Destructor Documentation

DD::Image::GeneralTile::GeneralTile	(	Iop &	input,
		const Box &	box,
		const ChannelSet &	chans,
		bool	forceUnpacked = false,
		bool	mt = false,
		InterestRatchet *	ir = nullptr
	)

Constructor. All image data will be available after this call, unless the calculation has been aborted due to user action or an error. Please check the aborted() state after construction and do not use the pixel data if this is set.

DD::Image::GeneralTile::~GeneralTile

(

)

destructor

DD::Image::GeneralTile::GeneralTile ( bool  loadOnDemand, Iop &  input, const Box &  box, const ChannelSet &  chans, bool  forceUnpacked = false, bool  mt = false, InterestRatchet *  ir = nullptr  )

protected

Constructor. This version expects an additional loadOnDemand argument. If set to True, the tile properties will be initialised but image data will not be available immediately after this call. It will instead be provided on demand as pixels are read from the tile. This can be useful for cases such as sampling where the tile defines a possible area that may be read from but the exact pixels which are needed are not known when the tile is constructed.

Member Function Documentation

int DD::Image::GeneralTile::x ( ) const

inline

accessor for the box's x value (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::y ( ) const

inline

accessor for the box's y value (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::r ( ) const

inline

accessor for the box's r value (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::t ( ) const

inline

accessor for the box's t value (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::w ( ) const

inline

accessor for the box's width (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::h ( ) const

inline

accessor for the box's height (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::clampy ( int  y ) const

inline

clamp a y value to within the box (provided for compatibility with DD::Image::RowCacheTile)

int DD::Image::GeneralTile::clampx ( int  x ) const

inline

clamp a x value to within the box (provided for compatibility with DD::Image::RowCacheTile)

DD::Image::GeneralTile::operator const Box & ( ) const

inline

cast operator for the box (provided for compatibility with DD::Image::RowCacheTile)

const DD::Image::Box& DD::Image::GeneralTile::box ( ) const

inline

return the box for the tile

const ChannelSet& DD::Image::GeneralTile::channels ( ) const

inline

get the channels for the tile

bool DD::Image::GeneralTile::is_zero	(	Channel	z,
		int	y
	)		const

is this channel/row pair 'zero' (ie is it mapped to no data, rather than checking explicitly whether it is full of zeroes

References DD::Image::Interest::is_zero().

bool DD::Image::GeneralTile::valid

(

)

const

whether the GeneralTile is accessible, or had it aborted during construction.

References DD::Image::Interest::valid().

float DD::Image::GeneralTile::at	(	int	x,
		int	y,
		Channel	z
	)

get the data at a particular pixel. with clipping

References DD::Image::RowCacheTile::at(), DD::Image::ImagePlane::at(), DD::Image::ImagePlane::chanNo(), and DD::Image::PlanarI::rowToStripeIndex().

bool DD::Image::GeneralTile::aborted

(

)

const

whether this Tile was aborted during construction.

References DD::Image::Op::aborted().

Referenced by load_range().

void DD::Image::GeneralTile::load_range	(	int	y,
		int	t
	)

Loads the image data from the specified range. The range should be within bounds passed to the tile at construction time.

References aborted(), DD::Image::Iop::fetchPlane(), DD::Image::PlanarI::getStripeBox(), DD::Image::Box::intersect(), DD::Image::Interest::load_range(), DD::Image::ImagePlane::readable(), DD::Image::Iop::requestedBox(), DD::Image::PlanarI::rowToStripeIndex(), DD::Image::ChannelSet::size(), DD::Image::Box::t(), DD::Image::Interest::valid(), and DD::Image::Box::y().

Box DD::Image::GeneralTile::getRequestBox ( Iop &  input )

staticprotected

helper function: get the requested box on an input, bypassing Iops that contribute nothing towards the image

References DD::Image::Interest::inputIop(), and DD::Image::Iop::requestedBox().