Add GPL modules

MediaBrowser.Model/Drawing/DrawingUtils.cs

@@ -0,0 +1,91 @@
+namespace MediaBrowser.Model.Drawing
+{
+    /// <summary>
+    /// Class DrawingUtils
+    /// </summary>
+    public static class DrawingUtils
+    {
+        /// <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 height, 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 ImageSize Resize(ImageSize size,
+            double width,
+            double height,
+            double maxWidth,
+            double maxHeight)
+        {
+            double newWidth = size.Width;
+            double newHeight = size.Height;
+
+            if (width > 0 && height > 0)
+            {
+                newWidth = width;
+                newHeight = height;
+            }
+
+            else if (height > 0)
+            {
+                newWidth = GetNewWidth(newHeight, newWidth, height);
+                newHeight = height;
+            }
+
+            else if (width > 0)
+            {
+                newHeight = GetNewHeight(newHeight, newWidth, width);
+                newWidth = width;
+            }
+
+            if (maxHeight > 0 && maxHeight < newHeight)
+            {
+                newWidth = GetNewWidth(newHeight, newWidth, maxHeight);
+                newHeight = maxHeight;
+            }
+
+            if (maxWidth > 0 && maxWidth < newWidth)
+            {
+                newHeight = GetNewHeight(newHeight, newWidth, maxWidth);
+                newWidth = maxWidth;
+            }
+
+            return new ImageSize { Width = newWidth, Height = newHeight };
+        }
+
+        /// <summary>
+        /// Gets the new width.
+        /// </summary>
+        /// <param name="currentHeight">Height of the current.</param>
+        /// <param name="currentWidth">Width of the current.</param>
+        /// <param name="newHeight">The new height.</param>
+        /// <returns>System.Double.</returns>
+        private static double GetNewWidth(double currentHeight, double currentWidth, double newHeight)
+        {
+            double scaleFactor = newHeight;
+            scaleFactor /= currentHeight;
+            scaleFactor *= currentWidth;
+
+            return scaleFactor;
+        }
+
+        /// <summary>
+        /// Gets the new height.
+        /// </summary>
+        /// <param name="currentHeight">Height of the current.</param>
+        /// <param name="currentWidth">Width of the current.</param>
+        /// <param name="newWidth">The new width.</param>
+        /// <returns>System.Double.</returns>
+        private static double GetNewHeight(double currentHeight, double currentWidth, double newWidth)
+        {
+            double scaleFactor = newWidth;
+            scaleFactor /= currentWidth;
+            scaleFactor *= currentHeight;
+
+            return scaleFactor;
+        }
+    }
+}