/// <summary>
/// Constructs an HG-3 attribute with the specified Id and <see cref="HG3ATS"/>.
/// </summary>
/// <param name="id">The identifier for the attribute.</param>
/// <param name="ats">The HG3ATS struct containing attribute information.</param>
/// <param name="hg3Frame">The HG-3 frame containing this attribute.</param>
internal Hg3Attribute(int id, HG3ATS ats, HgxFrame hg3Frame)
{
Hg3Frame = hg3Frame;
Id = id;
X = ats.X;
Y = ats.Y;
Width = ats.Width;
Height = ats.Height;
Color = Color.FromArgb(ats.Color);
}
private static Hg3FrameInfo ReadHg3FrameInfo(BinaryReader reader, HGXHDR hdr, bool frameOnly)
{
Stream stream = reader.BaseStream;
long frameOffset = stream.Position;
HG3FRAMEHDR frameHdr = reader.ReadUnmanaged <HG3FRAMEHDR>();
long tagStartPosition = stream.Position;
HG3TAG tag = reader.ReadUnmanaged <HG3TAG>();
if (!HG3STDINFO.HasTagSignature(tag.Signature))
{
throw new Exception("Expected \"stdinfo\" tag!");
}
HG3STDINFO stdInfo = reader.ReadUnmanaged <HG3STDINFO>();
Hg3FrameInfo frameInfo = new Hg3FrameInfo(frameHdr, stdInfo, frameOffset);
while (tag.OffsetNext != 0)
{
stream.Position = tagStartPosition + tag.OffsetNext;
tagStartPosition = stream.Position;
tag = reader.ReadUnmanaged <HG3TAG>();
string signature = tag.Signature;
if (HG3IMG.HasTagSignature(signature, out int imdId)) // "img####"
{
HG3IMG img = reader.ReadUnmanaged <HG3IMG>();
frameInfo.AddTagImg(stream, tag, img, imdId);
}
else if (HG3IMG_AL.HasTagSignature(signature)) // "img_al"
{
HG3IMG_AL img = reader.ReadUnmanaged <HG3IMG_AL>();
frameInfo.AddTagImg(stream, tag, img, 0);
}
else if (HG3IMG_JPG.HasTagSignature(signature)) // "img_jpg"
// There is no image info, reading it would increment by one byte which we don't want
{
frameInfo.AddTagImg(stream, tag, new HG3IMG_JPG(), 0);
}
else if (frameOnly)
{
if (frameInfo.Type != Hg3ImageType.None)
{
return(frameInfo);
}
}
else if (HG3ATS.HasTagSignature(signature, out int atsId)) // "ats####"
{
HG3ATS ats = reader.ReadUnmanaged <HG3ATS>();
frameInfo.Ats.Add(atsId, ats);
}
else if (HG3CPTYPE.HasTagSignature(signature)) // "cptype"
{
HG3CPTYPE cpType = reader.ReadUnmanaged <HG3CPTYPE>();
frameInfo.CpType = cpType;
}
else if (HG3IMGMODE.HasTagSignature(signature)) // "imgmode"
{
HG3IMGMODE imgMode = reader.ReadUnmanaged <HG3IMGMODE>();
frameInfo.ImgMode = imgMode;
}
else
{
Trace.WriteLine($"UNKNOWN TAG: \"{signature}\"");
}
}
return(frameInfo);
}
