Added some useful constants.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_AFPGOCAResources@672769 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/afp/modca/AFPConstants.java

@@ -39,4 +39,15 @@ public interface AFPConstants {
      * The encoding to use to convert to US ASCII (7 bit)
      */
     String US_ASCII_ENCODING = "US-ASCII";
+    
+    /**
+     * The scaling of the default transform is set to
+     * approximately 72 user space coordinates per square inch
+     */
+    int DPI_72 = 72;
+    
+    /**
+     * 72dpi in millipoints
+     */
+    int DPI_72_MPTS = DPI_72 * 1000;
 }