/hg/icedtea-web: Double-buffer applet frame drawing.

[dbhole at icedtea.classpath.org]

changeset 8e66d9386273 in /hg/icedtea-web
details: http://icedtea.classpath.org/hg/icedtea-web?cmd=changeset;node=8e66d9386273
author: Deepak Bhole <dbhole at redhat.com>
date: Thu Nov 04 16:44:27 2010 -0700

	Double-buffer applet frame drawing.


diffstat:

3 files changed, 31 insertions(+)
ChangeLog                                                |    5 ++
NEWS                                                     |    1 
plugin/icedteanp/java/sun/applet/PluginAppletViewer.java |   25 ++++++++++++++

diffs (60 lines):

diff -r 2405cef22921 -r 8e66d9386273 ChangeLog
--- a/ChangeLog	Wed Nov 03 23:06:23 2010 +0000
+++ b/ChangeLog	Thu Nov 04 16:44:27 2010 -0700
@@ -1,3 +1,8 @@ 2010-10-28  Andrew John Hughes  <ahughes
+2010-11-04  Deepak Bhole <dbhole at redhat.com>
+
+	* plugin/icedteanp/java/sun/applet/PluginAppletViewer.java (update):
+	Override method and implement double-buffering.
+
 2010-10-28  Andrew John Hughes  <ahughes at redhat.com>
 
 	* Makefile.am:
diff -r 2405cef22921 -r 8e66d9386273 NEWS
--- a/NEWS	Wed Nov 03 23:06:23 2010 +0000
+++ b/NEWS	Thu Nov 04 16:44:27 2010 -0700
@@ -12,3 +12,4 @@ New in release 1.0 (2010-XX-XX):
 
 * Initial release of IcedTea-Web
 * PR542: Plugin fails with NPE on http://www.openprocessing.org/visuals/iframe.php?visualID=2615
+* Applets are now double-buffered to eliminate flicker in ones that do heavy drawing
diff -r 2405cef22921 -r 8e66d9386273 plugin/icedteanp/java/sun/applet/PluginAppletViewer.java
--- a/plugin/icedteanp/java/sun/applet/PluginAppletViewer.java	Wed Nov 03 23:06:23 2010 +0000
+++ b/plugin/icedteanp/java/sun/applet/PluginAppletViewer.java	Thu Nov 04 16:44:27 2010 -0700
@@ -358,6 +358,9 @@ import com.sun.jndi.toolkit.url.UrlUtil;
      public static final int APPLET_TIMEOUT = 180000;
 
      private static Long requestIdentityCounter = 0L;
+     
+     private Image bufFrameImg;
+     private Graphics bufFrameImgGraphics;
      
      /**
       * Null constructor to allow instantiation via newInstance()
@@ -2163,4 +2166,26 @@ import com.sun.jndi.toolkit.url.UrlUtil;
         }
     }
      }
+
+     /**
+      * {@inheritDoc}
+      *
+      * This method calls paint directly, rather than via super.update() since
+      * the parent class's update() just does a couple of checks (both of 
+      * which are accounted for) and then calls paint anyway.
+      */
+     public void update(Graphics g) {
+
+    	 // If the image or the graphics don't exist, create new ones
+    	 if (bufFrameImg == null || bufFrameImgGraphics == null) {
+    		 bufFrameImg = createImage(getWidth(), getHeight());
+    		 bufFrameImgGraphics = bufFrameImg.getGraphics ();
+    	 }
+
+    	 // Paint off-screen
+    	 paint(bufFrameImgGraphics);
+
+    	 // Draw the painted image
+    	 g.drawImage(bufFrameImg, 0, 0, this);
+     }
  }