ImageProcessor auto-resize

gistfile1.cs

MediaFileSystem mediaFileSystem = FileSystemProviderManager.Current.GetFileSystemProvider<MediaFileSystem>();
IContentSection contentSection = UmbracoConfig.For.UmbracoSettings().Content;
IEnumerable<string> supportedTypes = contentSection.ImageFileTypes.ToList();

foreach (IMedia media in e.SavedEntities)
{
    if (media.HasProperty("umbracoFile"))
    {
        // Make sure it's an image.
        string path = media.GetValue<string>("umbracoFile");
        if (!string.IsNullOrEmpty(path))
        {
            string extension = Path.GetExtension(path).Substring(1);
            if (supportedTypes.InvariantContains(extension))
            {
                // Resize the image to 1920px wide, height is driven by the aspect ratio of the image.
                string fullPath = mediaFileSystem.GetFullPath(path);
                using (ImageFactory imageFactory = new ImageFactory(true))
                {
                    int resizeDimension = 1920;
                    int.TryParse(ConfigurationManager.AppSettings["ic:ResizeDimension"], out resizeDimension);

                    int umbracoWidth = int.Parse(media.GetValue<string>("umbracoWidth"));
                    int umbracoHeight = int.Parse(media.GetValue<string>("umbracoHeight"));

                    ResizeLayer layer = new ResizeLayer(new Size(umbracoWidth > umbracoHeight ? resizeDimension : 0, umbracoHeight > umbracoWidth ? resizeDimension : 0), resizeMode: ResizeMode.Max)
                    {
                        Upscale = false
                    };

                    imageFactory.Load(fullPath).Resize(layer).Save(fullPath);
                }
            }
        }
    }
}