DD::Image::Executable Class Reference

Class to wrap up node graph execution. More...

Inherited by DD::Image::ParticleCache, DD::Image::Write, and DD::Image::WriteGeo.

Public Types
enum	ExecMode { WriteOne, WriteAny, WriteMany }

Public Member Functions
	Executable (Op *op)
virtual void	beginExecuting ()
virtual void	execute ()=0
virtual bool	isExecuteThreadSafe () const
virtual void	endExecuting ()
void	setViewsToExecute (const std::set< int > &view)
void	clearViewsToExecute ()
const std::set< int > &	viewsToExecute ()
virtual ExecMode	execViewMode ()
	can this node be usefully executed for more than one view in sequence More...
virtual ExecMode	execFrameMode ()
	can this node be usefully executed for more then one frame in sequence More...
virtual const std::set< int > &	views ()
	return the views that this node will execute
virtual bool	isWrite () const
	return true if this should be picked up by an execute of everything More...
void	frameRangeKnobs (Knob_Callback)
	provide frame range knobs and a 'limit to frame range'
virtual bool	skipForContext (const OutputContext &context) const
int	frameRangeKnobsChanged (DD::Image::Knob *knob)
virtual Executable *	executable ()=0
virtual const char *	filename () const

Detailed Description

Class to wrap up node graph execution.

Member Enumeration Documentation

enum DD::Image::Executable::ExecMode

Enumerator
WriteOne	The Op can only be usefully executed for one view/frame unless a filename knob changes when the view or frame changes
WriteAny	The Op can be usefully executed for various views/frames, even though no knobs change when the view/frame changes. A movie file can do this for frames, for instance.
WriteMany	The op, when executed, will ignore the views/frames passed to it, and instead write out a set of views or frames that it chooses. (exr writer with multiple views, for example)

Member Function Documentation

virtual bool DD::Image::Executable::isExecuteThreadSafe ( ) const

inlinevirtual

Whether the execute() function on this Executable object can be safely run in a parallel thread. If you return true from this you cannot use any knob setting functions, in particular.

Executable::ExecMode DD::Image::Executable::execViewMode ( )

virtual

can this node be usefully executed for more than one view in sequence

Default is WriteAny, indicating this can be called over and over with different views. Note that the Write Op overrides this and returns WriteOne by default.

Reimplemented in DD::Image::Write, and DD::Image::WriteGeo.

References WriteAny.

Executable::ExecMode DD::Image::Executable::execFrameMode ( )

virtual

can this node be usefully executed for more then one frame in sequence

Default is WriteAny, indicating this can be called over and over with different frames. Note that the Write Op overrides this and returns WriteOne by default.

Reimplemented in DD::Image::Write, and DD::Image::WriteGeo.

References WriteAny.

bool DD::Image::Executable::isWrite ( ) const

virtual

return true if this should be picked up by an execute of everything

Return true if this node should be executed when the user asks for the group or script containing this node to be executed. Typically true only for Write nodes.

Reimplemented in DD::Image::Write.

bool DD::Image::Executable::skipForContext ( const OutputContext &  context ) const

virtual

return true if this node should be skipped for this context. default implementation is used for the 'limit to frame range' facility by Write/WriteGeo; if you call frameRangeKnobs in your knobs function you get that behaviour, but it can also be overriden

References DD::Image::ValueStuffI::get_value(), and DD::Image::Op::knob().

int DD::Image::Executable::frameRangeKnobsChanged

(

DD::Image::Knob *

knob

)

If you use frameRangeKnobs your knob_changed should call this and return 1 if it returns 1, to handle enabling/disabling of the limit knobs. It is interested in both the knob 'use_limit' and &Knob::showPanel

References DD::Image::Knob::enable(), DD::Image::Knob::is(), DD::Image::Op::knob(), and DD::Image::Knob::showPanel.

virtual const char* DD::Image::Executable::filename ( ) const

inlinevirtual

Get the filename that this wishes to write to (if any), otherwise NULL.