#include "ofxImageEffect.h" #define kOfxImageEffectActionDescribeInContext "OfxImageEffectActionDescribeInContext"
This action is unique to OFX Image Effect plug-ins. Because a plugin is able to exhibit different behaviour depending on the context of use, each separate context will need to be described individually. It is within this action that image effects describe which parameters and input clips it requires.
This action will be called multiple times, one for each of the contexts the plugin says it is capable of implementing. If a host does not support a certain context, then it need not call
for that context.
This action must be trapped, it is not optional.