public static byte[] GetResizedImageBytesGIF89a(Stream stream, Size ts, int quality, out Size sz)
{
GifDecoder originalimage = new GifDecoder();
originalimage.Read(stream);
sz = originalimage.GetFrameSize();
return(GetResizedImageBytesGIF89a(originalimage, stream, ts, quality));
}
public static bool TryGetResizedImageBytesGIF89a(Stream stream, Size ts, int quality, out Size sz, out byte[] bytes)
{
bytes = null;
sz = default(Size);
GifDecoder originalimage = new GifDecoder();
if (!originalimage.TryRead(stream))
{
return(false);
}
sz = originalimage.GetFrameSize();
bytes = GetResizedImageBytesGIF89a(originalimage, stream, ts, quality);
return(true);
}
public static byte[] GetThumbnailGIF89a(Stream stream, Size min, Size thumb)
{
long offset = stream.Position;
GifDecoder decoder = new GifDecoder();
decoder.Read(stream);
Size sz = decoder.GetFrameSize();
stream.Seek(offset, SeekOrigin.Begin);
if (min != null && sz.Width < min.Width && sz.Height < min.Height)
{
throw new InvalidImageSizeException(
string.Empty, sz, min);
}
return(GetResizedImageBytesGIF89a(decoder, stream, thumb, s_ImageQuality));
}
public static byte[] GetResizedImageBytesGIF89a(GifDecoder originalimage, Stream stream, Size ts, int quality)
{
Size sz = originalimage.GetFrameSize();
if (sz.Height > ts.Height || sz.Width > ts.Width)
{
MemoryStream ms = new MemoryStream();
AnimatedGifEncoder.Resize(originalimage, ms, ts.Width, ts.Height, quality);
ms.Flush();
byte[] result = new byte[ms.Length];
MemoryStream resultstream = new MemoryStream(result);
ms.WriteTo(resultstream);
return(result);
}
else
{
stream.Seek(0, SeekOrigin.Begin);
BinaryReader sr = new BinaryReader(stream);
return(sr.ReadBytes((int)stream.Length));
}
}
