Add properties for font cell width/height

Can be used by visualizers.

CommonUtil/Font8x8.cs

@@ -18,7 +18,20 @@ using System.Collections.Generic;
 using System.Diagnostics;
 
 namespace CommonUtil {
+    /// <summary>
+    /// 8x8 monochrome cells.  The right and bottom edges of each cell are left blank,
+    /// so glyphs can be packed tightly.
+    /// </summary>
     public static class Font8x8 {
+        /// <summary>
+        /// Returns an 8-byte array for the specified character.  Each byte represents one
+        /// row.  The first byte holds the top row, and the most significant bit in each
+        /// byte is the leftmost pixel.
+        ///
+        /// If no glyph is defined, returns the Unicode REPLACEMENT CHARACTER glyph.
+        /// </summary>
+        /// <param name="ch">Requested character.</param>
+        /// <returns>Reference to int[8] with data (do not modify contents).</returns>
         public static int[] GetBitData(char ch) {
             if (sBitData == null) {
                 InitBitData();

PluginCommon/VisBitmap8.cs

@@ -141,8 +141,11 @@ namespace PluginCommon {
         }
 
         /// <summary>
-        /// Draws an 8x8 character on the bitmap.
+        /// Draws an 8x8 character cell on the bitmap.
         /// </summary>
+        /// <remarks>
+        /// Might want a way to specify that the background shouldn't be drawn at all.
+        /// </remarks>
         /// <param name="vb">Bitma to draw on.</param>
         /// <param name="ch">Character to draw.</param>
         /// <param name="xc">X coord of upper-left pixel.</param>
@@ -168,5 +171,9 @@ namespace PluginCommon {
                 yc++;
             }
         }
+
+        // Character cell dimensions.
+        public static int CharWidth { get { return 8; } }
+        public static int CharHeight { get { return 8; } }
     }
 }