some changes for out of order rendering and rendering to a renderer

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@194565 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 9 insertions, 0 deletions

diff --git a/src/org/apache/fop/area/PageViewport.java b/src/org/apache/fop/area/PageViewport.java
index b31ce3030..3fdab2b60 100644
--- a/src/org/apache/fop/area/PageViewport.java
+++ b/src/org/apache/fop/area/PageViewport.java
@@ -54,4 +54,13 @@ public class PageViewport {
     public void loadPage(ObjectInputStream in) throws Exception {
         page = (Page) in.readObject();
     }
+
+    /**
+     * Clear the page contents to save memory.
+     * THis objects is kept for the life of the area tree since
+     * it holds id information and is used as a key.
+     */
+    public void clear() {
+        page = null;
+    }
 }