public bool Save(Stream stream)
{
Contract.Requires(frameList.Count > 0);
Contract.Requires(Unit != Unit.Unknown);
var encode = new TiffEncode();
var properties = new Properties();
properties.Compression = Compression;
properties.ColorType = ColorType;
properties.BytesPerPixel = BytesPerPixel;
properties.Width = Width;
properties.Height = Height;
properties.Unit = Unit;
properties.XResolution = XResolution;
properties.YResolution = YResolution;
foreach (var frame in frameList)
{
var ifd = new ImageFileDirection(properties, frame.GetPixels());
encode.AddFrame(ifd);
}
encode.Save(stream);
return(true);
}
public bool AddFrame(ImageFileDirection frame)
{
Contract.Assert(frame != null);
;
if (frameList.Contains(frame))
{
return(false);
}
frameList.Add(frame);
return(true);
}
/// <summary>
///
/// </summary>
/// <param name="stream"></param>
/// <param name="quickly">为true时，快速加载，只解析每个帧的头信息，而不解析所有内容(第一帧为完整加载)</param>
/// <returns></returns>
public bool Load(Stream stream, bool quickly = false)
{
var ifh = new ImageFileHeader();
if (!ifh.Load(stream))
{
return(false);
}
IsBigEndian = ifh.IsBigEndian;
//第一个IFD位置偏移
var nextPosition = ifh.FirstFramePosition;
while (true)
{
if (nextPosition != stream.Position)
{
Contract.Requires(nextPosition > stream.Position);
stream.Position = nextPosition;
}
var ifd = new ImageFileDirection();
if (quickly)
{
ifd.LoadHeader(stream, IsBigEndian);
}
else
{
ifd.Load(stream, IsBigEndian);
}
ImageFileDirectionList.Add(ifd);
if (ifd.NextIfdIndex == 0)
{
break;
}
nextPosition = ifd.NextIfdIndex;
}
Contract.Requires(ImageFileDirectionList.Count > 0);
return(true);
}
