public static void ResizeAnimatedGif()
{
// Read from file
using (MagickImageCollection collection = new MagickImageCollection(SampleFiles.SnakewareGif))
{
// This will remove the optimization and change the image to how it looks at that point
// during the animation. More info here: http://www.imagemagick.org/Usage/anim_basics/#coalesce
collection.Coalesce();
// Resize each image in the collection to a width of 200. When zero is specified for the height
// the height will be calculated with the aspect ratio.
foreach (MagickImage image in collection)
{
image.Resize(200, 0);
}
// Save the result
collection.Write(SampleFiles.OutputDirectory + "Snakeware.resized.gif");
}
}
private static MagickImage ExecuteCoalesce(MagickImageCollection collection)
{
collection.Coalesce();
return null;
}
public void Test_Coalesce()
{
using (MagickImageCollection collection = new MagickImageCollection())
{
ExceptionAssert.Throws<InvalidOperationException>(delegate ()
{
collection.Coalesce();
});
collection.Read(Files.RoseSparkleGIF);
using (PixelCollection pixels = collection[1].GetPixels())
{
MagickColor color = pixels.GetPixel(53, 3).ToColor();
Assert.AreEqual(0, color.A);
}
collection.Coalesce();
using (PixelCollection pixels = collection[1].GetPixels())
{
MagickColor color = pixels.GetPixel(53, 3).ToColor();
Assert.AreEqual(Quantum.Max, color.A);
}
}
}
private static MagickImage ExecuteCoalesce(MagickImageCollection collection)
{
collection.Coalesce();
return(null);
}
