Rendering - Sovled inconsistencies between software and Vulkan rendering

LED sampling - Improved LED sampling on <100% scale

src/Artemis.Core/Extensions/FloatExtensions.cs

@@ -16,7 +16,7 @@ namespace Artemis.Core
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static int RoundToInt(this float number)
         {
-            return (int) Math.Round(number, MidpointRounding.AwayFromZero);
+            return (int) MathF.Round(number, MidpointRounding.AwayFromZero);
         }
     }
 }

src/Artemis.Core/Extensions/RgbDeviceExtensions.cs

@@ -25,11 +25,16 @@ namespace Artemis.Core
         public static SKRect ToSKRect(this Rectangle rectangle)
         {
             return SKRect.Create(
-                (float) rectangle.Location.X,
-                (float) rectangle.Location.Y,
-                (float) rectangle.Size.Width,
-                (float) rectangle.Size.Height
+                rectangle.Location.X,
+                rectangle.Location.Y,
+                rectangle.Size.Width,
+                rectangle.Size.Height
             );
         }
+
+        public static SKRectI ToSKRectI(this Rectangle rectangle)
+        {
+            return SKRectI.Round(ToSKRect(rectangle));
+        }
     }
 }