#include "ofxImageEffect.h" #define kOfxImageEffectActionIsIdentity "OfxImageEffectActionIsIdentity"
handlehandle to the instance, cast to an
inArgshas the following properties...
kOfxPropTime- the time at which to test for identity
kOfxImageEffectPropFieldToRender- the field to test for identity
kOfxImageEffectPropRenderWindow- the window (in \ref PixelCoordinates) to test for identity under
kOfxImageEffectPropRenderScale- the scale factor being applied to the images being renderred
outArgshas the following properties which the plugin can set...
Sometimes an effect can pass through an input uprocessed, for example a blur effect with a blur size of 0. This action can be called by a host before it attempts to render an effect to determine if it can simply copy input directly to output without having to call the render action on the effect.
If the effect does not need to process any pixels, it should set the value of the
to the clip that the host should us as the output instead, and the
to be the time at which the frame should be fetched from a clip.
outArgsindicate what frame from which clip to use instead
The default action is to call the render action on the effect.