1 files changed, 81 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Drawing/DrawingUtils.cs b/MediaBrowser.Controller/Drawing/DrawingUtils.cs
new file mode 100644
index 000000000..8e2f829b9
--- /dev/null
+++ b/MediaBrowser.Controller/Drawing/DrawingUtils.cs
@@ -0,0 +1,81 @@
+using System;
+using System.Drawing;
+
+namespace MediaBrowser.Controller.Drawing
+{
+    public static class DrawingUtils
+    {
+        /// <summary>
+        /// Resizes a set of dimensions
+        /// </summary>
+        public static Size Resize(int currentWidth, int currentHeight, int? width, int? height, int? maxWidth, int? maxHeight)
+        {
+            return Resize(new Size(currentWidth, currentHeight), width, height, maxWidth, maxHeight);
+        }
+
+        /// <summary>
+        /// Resizes a set of dimensions
+        /// </summary>
+        /// <param name="size">The original size object</param>
+        /// <param name="width">A new fixed width, if desired</param>
+        /// <param name="height">A new fixed neight, if desired</param>
+        /// <param name="maxWidth">A max fixed width, if desired</param>
+        /// <param name="maxHeight">A max fixed height, if desired</param>
+        /// <returns>A new size object</returns>
+        public static Size Resize(Size size, int? width, int? height, int? maxWidth, int? maxHeight)
+        {
+            decimal newWidth = size.Width;
+            decimal newHeight = size.Height;
+
+            if (width.HasValue && height.HasValue)
+            {
+                newWidth = width.Value;
+                newHeight = height.Value;
+            }
+
+            else if (height.HasValue)
+            {
+                newWidth = GetNewWidth(newHeight, newWidth, height.Value);
+                newHeight = height.Value;
+            }
+
+            else if (width.HasValue)
+            {
+                newHeight = GetNewHeight(newHeight, newWidth, width.Value);
+                newWidth = width.Value;
+            }
+
+            if (maxHeight.HasValue && maxHeight < newHeight)
+            {
+                newWidth = GetNewWidth(newHeight, newWidth, maxHeight.Value);
+                newHeight = maxHeight.Value;
+            }
+
+            if (maxWidth.HasValue && maxWidth < newWidth)
+            {
+                newHeight = GetNewHeight(newHeight, newWidth, maxWidth.Value);
+                newWidth = maxWidth.Value;
+            }
+
+            return new Size(Convert.ToInt32(newWidth), Convert.ToInt32(newHeight));
+        }
+
+        private static decimal GetNewWidth(decimal currentHeight, decimal currentWidth, int newHeight)
+        {
+            decimal scaleFactor = newHeight;
+            scaleFactor /= currentHeight;
+            scaleFactor *= currentWidth;
+
+            return scaleFactor;
+        }
+
+        private static decimal GetNewHeight(decimal currentHeight, decimal currentWidth, int newWidth)
+        {
+            decimal scaleFactor = newWidth;
+            scaleFactor /= currentWidth;
+            scaleFactor *= currentHeight;
+
+            return scaleFactor;
+        }
+    }
+}