/// <summary>
/// Loads a <see cref="FieldImage"/> from a <see cref="LightFieldPackage"/>.
/// </summary>
/// <param name="package">The package to load the field image from.</param>
/// <returns>a new instance of the <see cref="FieldImage"/> class.</returns>
public static FieldImage From(LightFieldPackage package)
{
if (package == null)
{
throw new ArgumentNullException("package");
}
LightFieldComponent metadataComponent = package.GetMetadata().FirstOrDefault();
if (metadataComponent == null)
{
throw new ArgumentException("The package does not contain any metadata.", "package");
}
Json.Master master = new Json.Master();
try { master.LoadFromJson(metadataComponent.GetDataAsString()); }
catch (FormatException e) { throw new ArgumentException("The package contains invalid metadata.", e); }
if (master.Picture == null)
{
throw new ArgumentException("The package does not contain required metadata.", "package");
}
PictureMetadata pictureMetadata = new PictureMetadata(master.Picture);
LightFieldComponent frameMetadataComponent = package.GetComponent(pictureMetadata.Frame.MetadataReference).FirstOrDefault();
if (frameMetadataComponent == null)
{
throw new ArgumentException("The package does not contain any frame metadata.", "package");
}
Json.FrameMetadata frameMetadata = new Json.FrameMetadata();
try { frameMetadata.LoadFromJson(frameMetadataComponent.GetDataAsString()); }
catch (FormatException e) { throw new ArgumentException("The package contains invalid metadata.", e); }
Json.FrameMetadata privateMetadata = new Json.FrameMetadata();
LightFieldComponent privateMetadataComponent = package.GetComponent(pictureMetadata.Frame.PrivateMetadataReference).FirstOrDefault();
if (privateMetadataComponent != null)
{
try { privateMetadata.LoadFromJson(frameMetadataComponent.GetDataAsString()); }
catch (FormatException) { }
}
LightFieldComponent frameComponent = package.GetComponent(pictureMetadata.Frame.ImageReference).FirstOrDefault();
if (frameComponent == null)
{
throw new ArgumentException("The package does not contain the frame data.", "package");
}
return(new FieldImage(frameComponent, frameMetadata, privateMetadata));
}
private void LoadFrame(Json.FrameItem frameItem)
{
if (frameItem == null || frameItem.Frame == null)
{
return;
}
Json.FrameReferences frameReferences = frameItem.Frame;
if (frameReferences.Metadata == null && frameReferences.MetadataRef != null)
{
LightFieldComponent frameMetadataComponent = Package.GetComponent(frameReferences.MetadataRef).FirstOrDefault();
if (frameMetadataComponent != null)
{
try
{
Json.FrameMetadata frameMetadata = new Json.FrameMetadata();
frameMetadata.LoadFromJson(frameMetadataComponent.GetDataAsString());
frameReferences.Metadata = frameMetadata;
}
catch (FormatException e) { OnException(e); }
}
}
if (frameReferences.PrivateMetadata == null && frameReferences.PrivateMetadataRef != null)
{
LightFieldComponent privateMetadataComponent = Package.GetComponent(frameReferences.PrivateMetadataRef).FirstOrDefault();
if (privateMetadataComponent != null)
{
try
{
Json.FrameMetadata privateMetadata = new Json.FrameMetadata();
privateMetadata.LoadFromJson(privateMetadataComponent.GetDataAsString());
frameReferences.PrivateMetadata = privateMetadata;
}
catch (FormatException e) { OnException(e); }
}
}
_frames.Add(frameReferences);
}