PDFBOX-4627, PDFBOX-5054: add javadoc

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1922862 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/contentstream/PDFStreamEngine.java

@@ -1171,6 +1171,13 @@ public void decreaseLevel()
         }
     }
 
+    /**
+     * Tells whether color operators should be processed. To be used in some OperatorProcessor
+     * classes.
+     *
+     * @return true if color operators should be processed, false if not, e.g. in type3 charprocs
+     * with d1 or in uncolored tiling patterns.
+     */
     public boolean isShouldProcessColorOperators()
     {
         return shouldProcessColorOperators;