FOP-3091: Fix test

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1903809 13f79535-47bb-0310-9956-ffa450edef68

fop-core/src/test/java/org/apache/fop/afp/AFPRectanglePainterTestCase.java

 import org.apache.fop.afp.parser.UnparsedStructuredField;
 import org.apache.fop.apps.FOUserAgent;
 import org.apache.fop.apps.FopFactory;
+import org.apache.fop.util.bitmap.BitmapImageUtil;
+import org.apache.fop.util.bitmap.DefaultMonochromeBitmapConverter;
 
 public class AFPRectanglePainterTestCase {
     @Test
         bis.skip(59);
         Assert.assertEquals(bis.read(), 0x8E); //start
         bis.skip(20);
-        Assert.assertEquals(bis.read(), 170); //mask data
+        if (BitmapImageUtil.createDefaultMonochromeBitmapConverter() instanceof DefaultMonochromeBitmapConverter) {
+            Assert.assertEquals(bis.read(), 255); //mask data
+        } else {
+            Assert.assertEquals(bis.read(), 170); //mask data
+        }
         bis.skip(1299);
         Assert.assertEquals(bis.read(), 0x8F); //end
         bis.skip(89);