/// <summary>
/// Constructs the image/tag combo with the current stream position, the tag, and the image data.
/// </summary>
/// <param name="stream">The stream to get the current position from.</param>
/// <param name="tag">The tag for this image.</param>
/// <param name="data">The image data for this image.</param>
/// <param name="id">the optional Id for <see cref="HG3IMG"/> tags.</param>
public Hg3TagImg(Stream stream, HG3TAG tag, THg3Img data, int id)
{
Tag = tag;
Data = data;
Offset = stream.Position;
Id = id;
}
/// <summary>
/// Adds a new image tag and data to the frame.
/// </summary>
/// <param name="stream">The stream to get the current position from.</param>
/// <param name="tag">The tag for this image.</param>
/// <param name="data">The image data for this image.</param>
/// <param name="id">the optional Id for <see cref="HG3IMG"/> tags.</param>
public void AddTagImg(Stream stream, HG3TAG tag, object data, int id)
{
switch (data)
{
case HG3IMG img: Img = new Hg3TagImg <HG3IMG> (stream, tag, img, id); break;
case HG3IMG_AL imgAl: ImgAl = new Hg3TagImg <HG3IMG_AL> (stream, tag, imgAl, id); break;
case HG3IMG_JPG imgJpg: ImgJpg = new Hg3TagImg <HG3IMG_JPG>(stream, tag, imgJpg, id); break;
default: throw new ArgumentException(nameof(data));
}
}