DD::Image::NoIop Class Reference

Inherits DD::Image::Iop.

Inherited by DD::Image::ToBuffer.

List of all members.

Public Member Functions
	NoIop (Node *node=0)
virtual void	knobs (Knob_Callback)
bool	pass_transform () const
Protected Member Functions
void	_validate (bool)
void	_request (int x, int y, int r, int t, ChannelMask, int count)
void	engine (int y, int x, int r, ChannelMask channels, Row &row)

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Detailed Description

This operator returns the input unchanged. You can use this as a base class for an Iop that does nothing to the image but changes some of the info_, such as the format, attributes, or set of channels. This avoids the need to write the pure virtual functions that a normal Iop needs.

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Member Function Documentation

void NoIop::_validate

(

bool

for_real

)

[protected, virtual]

This does set_out_channels(Mask_None), so _request() and engine() will not be called. If you subclass this you almost certainly need to override this function. You should call copy_info() and then modify the info in any way you want.

Reimplemented from DD::Image::Iop.

References DD::Image::Iop::copy_info(), and DD::Image::Iop::set_out_channels().

void NoIop::_request	(	int	x,
		int	y,
		int	r,
		int	t,
		ChannelMask	m,
		int	count
	)		[protected, virtual]

Requests the same area and channels from the input. _request() will not be called unless you override _validate().

Reimplemented from DD::Image::Iop.

References DD::Image::Iop::input0(), and DD::Image::Iop::request().

void NoIop::engine	(	int	y,
		int	x,
		int	r,
		ChannelMask	channels,
		Row &	row
	)		[protected, virtual]

Returns the input unchanged. _engine() will not be called unless you override _validate() to not call disable().

Implements DD::Image::Iop.

References DD::Image::Iop::get(), and DD::Image::Iop::input0().

void NoIop::knobs

(

Knob_Callback

)

[virtual]

No knobs.

Reimplemented from DD::Image::Op.

bool NoIop::pass_transform

(

)

const [virtual]

Returns true.

Reimplemented from DD::Image::Iop.