public static Bitmap DeepCloneGif(Image source, bool preserveMetaData = true)
{
GifDecoder decoder = new GifDecoder(source);
GifEncoder encoder = new GifEncoder(decoder.LoopCount);
for (int i = 0; i < decoder.FrameCount; i++)
{
using (GifFrame frame = decoder.GetFrame(i))
{
encoder.EncodeFrame(frame);
}
}
Image copy = encoder.Encode();
if (preserveMetaData)
{
ImageHelper.CopyMetadata(source, copy);
}
return((Bitmap)copy);
}
/// <summary>
/// Decode a gif, apply the given <see cref="RotateFlipType"/> and return the re-encoded the gif.
/// </summary>
/// <param name="bmp">The gif to process.</param>
/// <param name="rotateFlip">The <see cref="RotateFlipType"/> to apply.</param>
/// <returns>A rotated flipped gif based on the <see cref="RotateFlipType"/>; otherwise null.</returns>
public static Bitmap RotateFlipGif(Bitmap bmp, RotateFlipType rotateFlip)
{
try
{
GifDecoder d = new GifDecoder(bmp);
GifEncoder e = new GifEncoder(d.LoopCount);
for (int i = 0; i < d.FrameCount; i++)
{
using (GifFrame frame = d.GetFrame(i))
{
frame.Image.RotateFlip(rotateFlip);
e.EncodeFrame(frame);
}
}
return((Bitmap)e.Encode());
}
catch
{
return(null);
}
}
/// <summary>
/// Invert the colors of every frame of a bitmap with animated frames.
/// </summary>
/// <param name="bmp"> The bitmap to invert. </param>
/// <returns></returns>
public static Bitmap InvertGif(Bitmap bmp)
{
try
{
GifDecoder d = new GifDecoder(bmp);
GifEncoder e = new GifEncoder(d.LoopCount);
for (int i = 0; i < d.FrameCount; i++)
{
using (GifFrame frame = d.GetFrame(i))
{
InvertBitmapSafe(frame.Image);
e.EncodeFrame(frame);
}
}
return((Bitmap)e.Encode());
}
catch
{
return(null);
}
}
