From af1e535a3aca4a14f150202c09660d17a4e243b6 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Sun, 24 Jun 2018 01:46:23 +1000
Subject: [PATCH] Create new DensityUnits enum.

---
 src/ImageSharp/Formats/DensityUnits.cs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/ImageSharp/Formats/DensityUnits.cs

diff --git a/src/ImageSharp/Formats/DensityUnits.cs b/src/ImageSharp/Formats/DensityUnits.cs
new file mode 100644
index 000000000..ce30bd06c
--- /dev/null
+++ b/src/ImageSharp/Formats/DensityUnits.cs
@@ -0,0 +1,26 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Formats
+{
+    /// <summary>
+    /// Provides enumeration of available pixel density units.
+    /// </summary>
+    public enum DensityUnits : byte
+    {
+        /// <summary>
+        /// No units; width:height pixel aspect ratio = Ydensity:Xdensity
+        /// </summary>
+        AspectRatio = 0,
+
+        /// <summary>
+        /// Pixels per inch (2.54 cm)
+        /// </summary>
+        PixelsPerInch = 1, // Other image formats would default to this.
+
+        /// <summary>
+        /// Pixels per centimeter.
+        /// </summary>
+        PixelsPerCentimeter = 2
+    }
+}