APNG.NET

A fully-managed APNG (Animated Portable Network Graphics) Parser

Original is https://github.com/xupefei/APNG.NET

Difference

• LibAPNG is .NET Standard libary
• Extensions for WPF (.NET Framework)
  • Convert each PNG frame to BitmapSource objects
  • Create key frame animation, So you can display APNG to Image control using Storyboard.
• Remove XNA projects
• Update to Visual Studio 2019

Usages

APNG to BitmapSource objects

var apng = new APNG("a.png");
var bitmaps = apng.ToBitmapSources();

// Save to PNG files
foreach (var (bitmap, index) in bitmaps.Select((item, index) => (item, index)))
{
    using (var fileStream = new FileStream($"{index}.png", FileMode.Create))
    {
        var encoder = new PngBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(bitmap));
        encoder.Save(fileStream);
    }
}

Display APNG to Image control

<Image Name="PngImage" />

var apng = new APNG("a.png");
if (apng.IsSimplePNG)
    PngImage.Source = BitmapFrame.Create(
        apng.DefaultImage.GetStream(), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
    apng.ToAnimation().CreateStoryboardFor(PngImage).Begin(PngImage);