/// <summary>Creates a new <see cref="EffectController"/> instance.</summary>
internal EffectController(Effect effect, EffectCallback effectCallback) {
SourceEffect = effect;
SourceEffect.Validate();
RuntimeEffect = SourceEffect.Decompose();
State = EffectState.Playing;
_rootTimeline = new ParallelTimeline();
RuntimeEffect.DefineTimeline(_rootTimeline, TimeSpan.Zero);
if (!GlobalSpeedRatio.IsOne()) {
_rootTimeline.SpeedRatio = GlobalSpeedRatio;
}
_rootTimeline.CurrentStateInvalidated += _rootClockStateChanged;
_rootTimeline.Completed += _rootClockCompleted;
_effectCallback = effectCallback;
_rootClock = _rootTimeline.CreateClock();
var count = RuntimeEffect.ApplyClocks(_rootClock, 0);
if (count > 0) {
_rootClock.Controller.Begin();
} else {
State = EffectState.Completed;
_rootClock.Controller.Remove();
if (effectCallback != null) {
GuiTimer.StartAfterRender(t => effectCallback(this));
}
}
}
internal static extern CameraError SupportedEffects(IntPtr handle, EffectCallback callback, IntPtr userData = default);
/// <summary>Starts playing this effect, and invokes the given callback when the effect is completed.</summary>
/// <param name="onComplete">An event handler to invoke when the effect is completed.</param>
/// <returns>Returns an effect controller that can be used to interactively pause, resume, seek, skip, and stop the effect.</returns>
/// <remarks>When the effect is completed the animated properties and are either reset to their original values or kept at their
/// destination values, depending on the <see cref="P:InterpolatorEffect.IsTransient"/> property.</remarks>
public EffectController Play(EffectCallback onComplete) {
return new EffectController(this, onComplete);
}