Adding 'TextDirection.Rotate180'

src/UglyToad.PdfPig/Content/Letter.cs

@@ -87,6 +87,10 @@
         {
             if (System.Math.Abs(StartBaseLine.Y - EndBaseLine.Y) < 10e-5m)
             {
+                if (StartBaseLine.X > EndBaseLine.X)
+                {
+                    return TextDirection.Rotate180;
+                }
                 return TextDirection.Horizontal;
             }
             else if (System.Math.Abs(StartBaseLine.X - EndBaseLine.X) < 10e-5m)

src/UglyToad.PdfPig/Content/TextDirection.cs

@@ -1,8 +1,4 @@
-using System;
+namespace UglyToad.PdfPig.Content
-using System.Collections.Generic;
-using System.Text;
-
-namespace UglyToad.PdfPig.Content
 {
     /// <summary>
     /// Direction of the text.
@@ -19,6 +15,11 @@ namespace UglyToad.PdfPig.Content
         /// </summary>
         Horizontal,
 
+        /// <summary>
+        /// Horizontal text, upside down.
+        /// </summary>
+        Rotate180,
+
         /// <summary>
         /// Rotated text going down.
         /// </summary>