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Assets/UserReporting/Scripts/Client/PngHelper.cs

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+using System;
+
+namespace Unity.Cloud.UserReporting
+{
+    /// <summary>
+    /// Provides static methods for helping with PNG images.
+    /// </summary>
+    public static class PngHelper
+    {
+        #region Static Methods
+
+        /// <summary>
+        /// Gets a PNG image's height from base 64 encoded data.
+        /// </summary>
+        /// <param name="data">The data.</param>
+        /// <returns>The height.</returns>
+        public static int GetPngHeightFromBase64Data(string data)
+        {
+            // Preconditions
+            if (data == null || data.Length < 32)
+            {
+                return 0;
+            }
+
+            // Implementation
+            byte[] bytes = Convert.FromBase64String(data.Substring(0, 32));
+            byte[] heightBytes = PngHelper.Slice(bytes, 20, 24);
+            Array.Reverse(heightBytes);
+            int height = BitConverter.ToInt32(heightBytes, 0);
+            return height;
+        }
+
+        /// <summary>
+        /// Gets a PNG image's width from base 64 encoded data.
+        /// </summary>
+        /// <param name="data">The data.</param>
+        /// <returns>The width.</returns>
+        public static int GetPngWidthFromBase64Data(string data)
+        {
+            // Preconditions
+            if (data == null || data.Length < 32)
+            {
+                return 0;
+            }
+
+            // Implementation
+            byte[] bytes = Convert.FromBase64String(data.Substring(0, 32));
+            byte[] widthBytes = PngHelper.Slice(bytes, 16, 20);
+            Array.Reverse(widthBytes);
+            int width = BitConverter.ToInt32(widthBytes, 0);
+            return width;
+        }
+
+        /// <summary>
+        /// Slices a byte array.
+        /// </summary>
+        /// <param name="source">The source.</param>
+        /// <param name="start">The start.</param>
+        /// <param name="end">The end.</param>
+        /// <returns>The slices byte array.</returns>
+        private static byte[] Slice(byte[] source, int start, int end)
+        {
+            if (end < 0)
+            {
+                end = source.Length + end;
+            }
+
+            int len = end - start;
+            byte[] res = new byte[len];
+            for (int i = 0; i < len; i++)
+            {
+                res[i] = source[i + start];
+            }
+
+            return res;
+        }
+
+        #endregion
+    }
+}