diff options
Diffstat (limited to 'Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp')
| -rw-r--r-- | Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp b/Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp index 6548a25ed..b3c732819 100644 --- a/Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp +++ b/Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp @@ -261,9 +261,15 @@ void DrawingAreaImpl::setPaintingEnabled(bool paintingEnabled) void DrawingAreaImpl::updatePreferences(const WebPreferencesStore& store) { +#if PLATFORM(MAC) + // 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); + // <rdar://problem/10697417>: It is necessary to force compositing when accelerate drawing // is enabled on Mac so that scrollbars are always in their own layers. -#if PLATFORM(MAC) if (m_webPage->corePage()->settings()->acceleratedDrawingEnabled()) m_webPage->corePage()->settings()->setForceCompositingMode(LayerTreeHost::supportsAcceleratedCompositing()); else |