Android SVG Image Cache

ImageCacheService

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using Android.Graphics.Drawables;
using System.Threading.Tasks;
using Xamarin.Forms.Platform.Android;	
	
	public static class ImageCacheService 
	{
		static readonly string CacheLocation =  Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal),"ImageCache");

		static readonly NGraphics.IPlatform Platform = new NGraphics.AndroidPlatform();
		static ImageCacheService()
		{
			Directory.CreateDirectory(CacheLocation);
		}

		public static async Task<Drawable> GetImage(VectorImage vector, int width, int height, Xamarin.Forms.Color? color)
		{
			try{
				var resourceName = ImagePaths.ResourceIdForVector(vector);
				var fileName = Path.GetFileNameWithoutExtension(resourceName);
				fileName = $"{fileName} {width} {height}.png";

				var filePath = Path.Combine(CacheLocation, fileName);
				if (File.Exists(filePath)) {
					return ApplyTint(await Drawable.CreateFromPathAsync(filePath),color);
				}

				using (var file = new System.IO.StreamReader(ResourceLoader.GetEmbeddedResourceStream(resourceName)))
				{
					var size = new NGraphics.Size(width, height);
					var graphic = NGraphics.Graphic.LoadSvg(file);
					//Shame on Size not being Equatable ;)
					if (size.Width <= 0 || size.Height <= 0)
						size = graphic.Size;
					var gSize = graphic.Size;
					if (gSize.Width > size.Width || size.Height > gSize.Height)
					{
						var ratioX = size.Width / gSize.Width;
						var ratioY = size.Height / gSize.Height;
						var ratio = Math.Min(ratioY, ratioX);
						graphic.Size = size = new NGraphics.Size(gSize.Width * ratio, gSize.Height * ratio);
					}
					double Scale = (int)Xamarin.Forms.Forms.Context.Resources.DisplayMetrics.DensityDpi / 160f;
					var c = Platform.CreateImageCanvas(size, Scale);
					graphic.Draw(c);
					var image = c.GetImage() as NGraphics.BitmapImage;
					if(image.Bitmap == null)
					{
						throw new Exception("Foo");
					}
					await image.Bitmap.CompressAsync(Android.Graphics.Bitmap.CompressFormat.Png, 100, File.Open(filePath, FileMode.Create));
					return ApplyTint(new BitmapDrawable(image.Bitmap),color);
				}
			}
			catch(Exception ex) {
				Console.WriteLine("Error loading Vector {0}", vector);
				Console.WriteLine(ex);
			}
			return null;

		}

		static Drawable ApplyTint(Drawable drawable, Xamarin.Forms.Color? color)
		{
			if (color == null || drawable == null)
				return drawable;
			var filter = new Android.Graphics.PorterDuffColorFilter(color.Value.ToAndroid(), Android.Graphics.PorterDuff.Mode.SrcAtop);
			drawable.SetColorFilter(filter);
			return drawable;

		}