Loading remote image and writing it from controller

Question

I would like to return an image from a controller and be able to apply my own filters on it.

I created a controller and would like it to return Content(Img.BinaryData,"image/jpeg");

A view is not needed.

I'm using DynamicImage plugin to get a remote image and do some filters on it, but it returns a System.Windows.Media.Imaging.WriteableBitmap object.

Here is the furthest I got, but I'm trying to return it as binary data:

using SoundInTheory.DynamicImage.Sources;   

var composition = new Composition();
ImageLayer layer = new ImageLayer { Source = new RemoteImageSource { Url = "http://www.google.com/images/srpr/logo4w.png" } };
composition.Layers.Add(layer);

GeneratedImage generatedImage = composition.GenerateImage();

var Img = generatedImage.Image; // returns System.Windows.Media.Imaging.WriteableBitmap

return Content(Img.ToString(),"image/jpeg");

What am I missing here?

score 1 · Accepted Answer · edited May 23 '17 at 11:57

Try this:

var Img = generatedImage.Image

var encoder = new JpegBitmapEncoder();
var bmFrame = BitmapFrame.Create(Img);
encoder.Frames.Add(bmFrame);
encoder.QualityLevel = 100;

var res = new byte[0];

using (var stream = new MemoryStream())
{               
    encoder.Frames.Add(bmFrame);
    encoder.Save(stream);
    res = stream.ToArray(); 
    stream.Close();
}

return File(res, "image/jpeg");

(The BitmapSource to byte[] conversion is taken from https://stackoverflow.com/a/11085124/1625737)

Loading remote image and writing it from controller

1 Answers1