GraphicsContext culling support.

Source/core/rendering/svg/RenderSVGContainer.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 
 #include "core/rendering/svg/RenderSVGContainer.h"
 
+#include "core/frame/Settings.h"
 #include "core/rendering/GraphicsContextAnnotator.h"
 #include "core/rendering/LayoutRectRecorder.h"
 #include "core/rendering/LayoutRepainter.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/svg/SVGRenderingContext.h"
 #include "core/rendering/svg/SVGResources.h"
 #include "core/rendering/svg/SVGResourcesCache.h"
+#include "platform/graphics/GraphicsContextCullSaver.h"
 #include "platform/graphics/GraphicsContextStateSaver.h"
 
 namespace WebCore {
 
 RenderSVGContainer::RenderSVGContainer(SVGElement* node)
     : RenderSVGModelObject(node)
     , m_objectBoundingBoxValid(false)
     , m_needsBoundariesUpdate(true)
 {
 }
@@ skipping 78 matching lines @@
     PaintInfo childPaintInfo(paintInfo);
     {
         GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
 
         // Let the RenderSVGViewportContainer subclass clip if necessary
         applyViewportClip(childPaintInfo);
 
         childPaintInfo.applyTransform(localToParentTransform());
 
         SVGRenderingContext renderingContext;
+        GraphicsContextCullSaver cullSaver(*childPaintInfo.context);
         bool continueRendering = true;
         if (childPaintInfo.phase == PaintPhaseForeground) {
             renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
             continueRendering = renderingContext.isRenderingPrepared();
+
+            if (continueRendering && document().settings()->containerCullingEnabled())
+                cullSaver.cull(repaintRectInLocalCoordinates());
         }
 
         if (continueRendering) {
             childPaintInfo.updatePaintingRootForChildren(this);
             for (RenderObject* child = firstChild(); child; child = child->nextSibling())
                 child->paint(childPaintInfo, IntPoint());
         }
     }
 
     // FIXME: This really should be drawn from local coordinates, but currently we hack it
@@ skipping 45 matching lines @@
         if (objectBoundingBox().contains(localPoint)) {
             updateHitTestResult(result, roundedLayoutPoint(localPoint));
             return true;
         }
     }
     // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
     return false;
 }
 
 }