Subpixel rendering: Setting content to opaque on m_graphicsLayer depends on subpixel accumulation.

[zalan]

diff --git a/Source/WebCore/rendering/RenderLayerBacking.cpp b/Source/WebCore/rendering/RenderLayerBacking.cpp
index 2528ffa..68c9465 100644
--- a/Source/WebCore/rendering/RenderLayerBacking.cpp
+++ b/Source/WebCore/rendering/RenderLayerBacking.cpp
@@ -819,7 +819,7 @@ void RenderLayerBacking::updateGraphicsLayerGeometry()
     if (!m_isMainFrameRenderViewLayer) {
         // For non-root layers, background is always painted by the primary graphics layer.
         ASSERT(!m_backgroundLayer);
-        bool hadSubpixelRounding = !m_devicePixelFractionFromRenderer.isEmpty();
+        bool hadSubpixelRounding = !m_devicePixelFractionFromRenderer.isZero();
         m_graphicsLayer->setContentsOpaque(!hadSubpixelRounding && m_owningLayer.backgroundIsKnownToBeOpaqueInRect(localCompositingBounds));
     }

[zalan]

Created attachment 225951 [details]
Patch

[zalan]

Should find a way to test it :(

[zalan]

Created attachment 225986 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 225986 [details]
Patch

Clearing flags on attachment: 225986

Committed r165190: <http://trac.webkit.org/changeset/165190>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.