From 347ecaf1f36448a3169bf2b7783e0be6bb393bcc Mon Sep 17 00:00:00 2001
From: Dries Buytaert <dries@buytaert.net>
Date: Sat, 6 Mar 2010 07:46:49 +0000
Subject: - Patch #704182 by jide: use transparent PNG instead of opacity for
 overlay background to gain rendering performance.

---
 modules/overlay/images/background.png | Bin 0 -> 76 bytes
 modules/overlay/overlay-parent.css    |  18 ++++++++++++++----
 2 files changed, 14 insertions(+), 4 deletions(-)
 create mode 100644 modules/overlay/images/background.png

diff --git a/modules/overlay/images/background.png b/modules/overlay/images/background.png
new file mode 100644
index 000000000..ca87d6aaa
Binary files /dev/null and b/modules/overlay/images/background.png differ
diff --git a/modules/overlay/overlay-parent.css b/modules/overlay/overlay-parent.css
index 270890ebb..e9cc0cc2c 100644
--- a/modules/overlay/overlay-parent.css
+++ b/modules/overlay/overlay-parent.css
@@ -4,10 +4,10 @@
  * ui-dialog overlay.
  */
 .ui-widget-overlay {
-  background-color: #222;
-  opacity: 0.85;
-  filter: alpha(opacity=85);
-  background-image: none;
+  opacity: 1;
+  filter: none;
+  /* Using a transparent png renders faster than using opacity */
+  background: transparent url(images/background.png) repeat;
 }
 
 body.overlay-autofit {
@@ -158,3 +158,13 @@ body.overlay-autofit {
 .overlay div.add-or-remove-shortcuts {
   padding-top: 0.9em;
 }
+
+/**
+ * IE 6 Fix.
+ *
+ * Use filter to support transparency in IE6 for the overlay background.
+ */
+* html .ui-widget-overlay {
+  filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='modules/overlay/images/background.png', sizingMethod='scale');
+  background: none;
+}
-- 
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