Changeset 128787 in webkit

Timestamp:

Sep 17, 2012, 11:49:45 AM (13 years ago)

Author:

Beth Dakin

Message:

​https://bugs.webkit.org/show_bug.cgi?id=96936
Opt into layers for fixed positioned elements for TiledDrawingArea

Reviewed by Tim Horton.

This code already exists in DrawingAreaImpl, and we need it for
TiledCoreAnimationDrawingArea as well.

• WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:

(WebKit::TiledCoreAnimationDrawingArea::updatePreferences):

Location:

trunk/Source/WebKit2

Files:

• ChangeLog (modified) (1 diff)
• WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm (modified) (1 diff)

trunk/Source/WebKit2/ChangeLog

@@ +1 @@
+2012-09-17  Beth Dakin  <bdakin@apple.com>
+
+        https://bugs.webkit.org/show_bug.cgi?id=96936
+        Opt into layers for fixed positioned elements for TiledDrawingArea
+
+        Reviewed by Tim Horton.
+
+        This code already exists in DrawingAreaImpl, and we need it for 
+        TiledCoreAnimationDrawingArea as well.
+        * WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:
+        (WebKit::TiledCoreAnimationDrawingArea::updatePreferences):
+
 2012-09-17  Anders Carlsson  <andersca@apple.com>
 

trunk/Source/WebKit2/WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm

@@ -209 +209 @@
     ScrollingThread::dispatch(bind(&ScrollingTree::setScrollingPerformanceLoggingEnabled, m_webPage->corePage()->scrollingCoordinator()->scrollingTree(), scrollingPerformanceLoggingEnabled));
 
+    // Soon we want pages with fixed positioned elements to be able to be scrolled by the ScrollingCoordinator.
+    // As a part of that work, we have to composite fixed position elements, and we have to allow those
+    // elements to create a stacking context.
+    m_webPage->corePage()->settings()->setAcceleratedCompositingForFixedPositionEnabled(true);
+    m_webPage->corePage()->settings()->setFixedPositionCreatesStackingContext(true);
+
     bool showDebugBorders = m_webPage->corePage()->settings()->showDebugBorders();