static void CopyGif()
{
using (var dec = WicBitmapDecoder.Load(@"source.gif"))
{
var reader = dec.GetMetadataQueryReader();
Dump(reader);
Console.WriteLine();
foreach (var frame in dec)
{
Console.WriteLine(frame.Size);
reader = frame.GetMetadataReader();
Dump(reader);
Console.WriteLine();
}
using (var encoder = WICImagingFactory.CreateEncoder(dec.ContainerFormat))
{
using (var file = File.OpenWrite("test.gif"))
{
var mis = new ManagedIStream(file);
encoder.Initialize(mis);
foreach (var frame in dec)
{
var newFrame = encoder.CreateNewFrame();
newFrame.Initialize();
var md = frame.GetMetadataReader().Enumerate();
using (var writer = newFrame.GetMetadataQueryWriter())
{
writer.EncodeMetadata(md);
// change delay here
writer.SetMetadataByName("/grctlext/Delay", (ushort)5);
}
if (frame.Palette != null)
{
newFrame.SetPalette(frame.Palette.ComObject);
}
newFrame.WriteSource(frame.ComObject);
newFrame.Item1.Commit();
}
encoder.Commit();
}
}
}
}
static void Dump(string path)
{
//using (var bmp = WicBitmapSource.Load(path))
//{
//}
using (var dec = WicBitmapDecoder.Load(path))
{
var reader = dec.GetMetadataQueryReader();
Dump(reader);
Console.WriteLine();
foreach (var frame in dec)
{
Console.WriteLine(frame.Size);
reader = frame.GetMetadataReader();
Dump(reader);
Console.WriteLine();
}
}
}
