Display -webkit-filter objects in any column (instead of only in the first one).

third_party/WebKit/Source/core/paint/PaintLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 417 matching lines @@
 
     if (globalPaintFlags & GlobalPaintFlattenCompositingLayers) {
         TransformationMatrix matrix = *m_transform;
         makeMatrixRenderable(matrix, false /* flatten 3d */);
         return matrix;
     }
 
     return *m_transform;
 }
 
-// Convert a bounding box from flow thread coordinates, relative to |layer|, to visual coordinates, relative to |ancestorLayer|.
-// See http://www.chromium.org/developers/design-documents/multi-column-layout for more info on these coordinate types.
-static void convertFromFlowThreadToVisualBoundingBoxInAncestor(const PaintLayer* layer, const PaintLayer* ancestorLayer, LayoutRect& rect)
+void PaintLayer::convertFromFlowThreadToVisualBoundingBoxInAncestor(const PaintLayer* ancestorLayer, LayoutRect& rect) const
 {
-    PaintLayer* paginationLayer = layer->enclosingPaginationLayer();
+    PaintLayer* paginationLayer = enclosingPaginationLayer();
     ASSERT(paginationLayer);
     LayoutFlowThread* flowThread = toLayoutFlowThread(paginationLayer->layoutObject());
 
     // First make the flow thread rectangle relative to the flow thread, not to |layer|.
     LayoutPoint offsetWithinPaginationLayer;
-    layer->convertToLayerCoords(paginationLayer, offsetWithinPaginationLayer);
+    convertToLayerCoords(paginationLayer, offsetWithinPaginationLayer);
     rect.moveBy(offsetWithinPaginationLayer);
 
     // Then make the rectangle visual, relative to the fragmentation context. Split our box up into
     // the actual fragment boxes that layout in the columns/pages and unite those together to get
     // our true bounding box.
     rect = flowThread->fragmentsBoundingBox(rect);
 
     // Finally, make the visual rectangle relative to |ancestorLayer|.
     if (ancestorLayer->enclosingPaginationLayer() != paginationLayer) {
         rect.moveBy(paginationLayer->visualOffsetFromAncestor(ancestorLayer));
@@ skipping 1688 matching lines @@
     result.moveBy(offsetFromRoot);
     return result;
 }
 
 LayoutRect PaintLayer::fragmentsBoundingBox(const PaintLayer* ancestorLayer) const
 {
     if (!enclosingPaginationLayer())
         return physicalBoundingBox(ancestorLayer);
 
     LayoutRect result = flippedLogicalBoundingBox(logicalBoundingBox(), layoutObject());
-    convertFromFlowThreadToVisualBoundingBoxInAncestor(this, ancestorLayer, result);
+    convertFromFlowThreadToVisualBoundingBoxInAncestor(ancestorLayer, result);
     return result;
 }
 
 LayoutRect PaintLayer::boundingBoxForCompositingOverlapTest() const
 {
     // Apply NeverIncludeTransformForAncestorLayer, because the geometry map in CompositingInputsUpdater will take care of applying the
     // transform of |this| (== the ancestorLayer argument to boundingBoxForCompositing).
     return overlapBoundsIncludeChildren() ? boundingBoxForCompositing(this, NeverIncludeTransformForAncestorLayer) : fragmentsBoundingBox(this);
 }
 
@@ skipping 78 matching lines @@
         // FIXME: We can optimize the size of the composited layers, by not enlarging
         // filtered areas with the outsets if we know that the filter is going to render in hardware.
         // https://bugs.webkit.org/show_bug.cgi?id=81239
         result.expand(filterOutsets());
     }
 
     if (transform() && paintsWithTransform(GlobalPaintNormalPhase) && (this != ancestorLayer || options == MaybeIncludeTransformForAncestorLayer))
         result = transform()->mapRect(result);
 
     if (enclosingPaginationLayer()) {
-        convertFromFlowThreadToVisualBoundingBoxInAncestor(this, ancestorLayer, result);
+        convertFromFlowThreadToVisualBoundingBoxInAncestor(ancestorLayer, result);
         return result;
     }
     LayoutPoint delta;
     convertToLayerCoords(ancestorLayer, delta);
     result.moveBy(delta);
     return result;
 }
 
 CompositingState PaintLayer::compositingState() const
 {
@@ skipping 563 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif