| EffectUpdateListener | Some effects may issue callbacks to inform the host of changes to the effect state. |
| Effect | Effects are high-performance transformations that can be applied to image frames. |
| EffectContext | An EffectContext keeps all necessary state information to run Effects within a Open GL ES 2.0 context. |
| EffectFactory | The EffectFactory class defines the list of available Effects, and provides functionality to inspect and instantiate them. |
