ScreenToGif/ImageUtil/Decoder/GifCommentExtension.cs
(完整代码) 917Busing System.IO;
using System.Text;
namespace ScreenToGif.ImageUtil.Decoder
{
public class GifCommentExtension : GifExtension
{
public const int ExtensionLabel = 0xFE;
public string Text { get; private set; }
private GifCommentExtension()
{
}
public override GifBlockKind Kind
{
get { return GifBlockKind.SpecialPurpose; }
}
public static GifCommentExtension ReadComment(Stream stream)
{
var comment = new GifCommentExtension();
comment.Read(stream);
return comment;
}
private void Read(Stream stream)
{
// Note: at this point, the label (0xFE) has already been read
var bytes = GifHelpers.ReadDataBlocks(stream, false);
if (bytes != null)
Text = Encoding.ASCII.GetString(bytes);
}
}
}
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