add test for type 1 cff glyph locations and add missing doc comments

src/UglyToad.PdfPig.Tests/Integration/VisualVerification/GenerateLetterBoundingBoxImages.cs

@@ -12,6 +12,7 @@
         private const string SinglePageFormattedType0Content = "Type0 Font";
         private const string SinglePageType1Content = "ICML03-081";
         private const string SingleInkscapePage = "Single Page Simple - from inkscape";
+        private const string PigProduction = "Pig Production Handbook";
 
         private static string GetFilename(string name)
         {
@@ -61,6 +62,12 @@
             Run(@"Rotated Text Libre Office", 841);
         }
 
+        [Fact]
+        public void PigProductionCompactFontFormat()
+        {
+            Run(PigProduction);
+        }
+
         private static void Run(string file, int imageHeight = 792)
         {
             var pdfFileName = GetFilename(file);

src/UglyToad.PdfPig/Geometry/PdfPoint.cs

@@ -13,7 +13,7 @@
         /// <summary>
         /// The origin of the coordinates system.
         /// </summary>
-        public static PdfPoint Origin = new PdfPoint(0m, 0m);
+        public static PdfPoint Origin { get; } = new PdfPoint(0m, 0m);
 
         /// <summary>
         /// The X coordinate for this point. (Horizontal axis).
@@ -52,11 +52,21 @@
             Y = (decimal)y;
         }
 
+        /// <summary>
+        /// Creates a new <see cref="PdfPoint"/> which is the current point moved in the x direction relative to its current position by a value.
+        /// </summary>
+        /// <param name="dx">The distance to move the point in the x direction relative to its current location.</param>
+        /// <returns>A new point shifted on the x axis by the given delta value.</returns>
         public PdfPoint MoveX(decimal dx)
         {
             return new PdfPoint(X + dx, Y);
         }
-
+        
+        /// <summary>
+        /// Creates a new <see cref="PdfPoint"/> which is the current point moved in the y direction relative to its current position by a value.
+        /// </summary>
+        /// <param name="dy">The distance to move the point in the y direction relative to its current location.</param>
+        /// <returns>A new point shifted on the y axis by the given delta value.</returns>
         public PdfPoint MoveY(decimal dy)
         {
             return new PdfPoint(X, Y + dy);