/// <summary>
/// Updates the runtime context <see cref="ScriptVideoContextBase.FrameNumber"/> and <see cref="ScriptVideoContextBase.VideoPosition"/> property values
/// and raises the <see cref="FrameChanged"/> and <see cref="SurfaceRendered"/> events.
/// </summary>
/// <param name="frameNumber">The current zero-based frame number of the video.</param>
protected void OnFrameChanged(int frameNumber)
{
var internalContext = InternalContext;
int previousFrameNumber = internalContext.FrameNumber;
internalContext.SetFrameNumberInternal(frameNumber);
internalContext.RefreshVideoPositionInternal();
FrameChanged?.Invoke(this, new FrameChangedEventArgs(previousFrameNumber, frameNumber));
SurfaceRendered?.Invoke(this, new SurfaceRenderedEventArgs(SurfaceRenderPipeline.Both));
}
/// <summary>
/// Raises the <see cref="SurfaceRendered"/> event with arguments specifying which Direct3D surface was rendered.
/// </summary>
/// <param name="surfaceRenderPipeline">A <see cref="SurfaceRenderPipeline"/> enum value specifying which Direct3D surface was rendered.</param>
protected void OnSurfaceRendered(SurfaceRenderPipeline surfaceRenderPipeline)
{
SurfaceRendered?.Invoke(this, new SurfaceRenderedEventArgs(surfaceRenderPipeline));
}