Revamp filter primitive region calculations for Filter Effects

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/SVGFilterPainter.h"
 
 #include "core/layout/svg/LayoutSVGResourceFilter.h"
 #include "core/paint/FilterEffectBuilder.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "platform/graphics/filters/SkiaImageFilterBuilder.h"
@@ skipping 77 matching lines @@
     }
 
     const FloatRect referenceBox = object.objectBoundingBox();
     SVGFilterGraphNodeMap* nodeMap = SVGFilterGraphNodeMap::create();
     Filter* filter = FilterEffectBuilder::buildReferenceFilter(toSVGFilterElement(*m_filter.element()), referenceBox, nullptr, nullptr, nullptr, 1, nodeMap);
     if (!filter || !filter->lastEffect())
         return nullptr;
 
     IntRect sourceRegion = enclosingIntRect(intersection(filter->filterRegion(), object.strokeBoundingBox()));
     filter->getSourceGraphic()->setSourceRect(sourceRegion);
-    filter->lastEffect()->determineFilterPrimitiveSubregion(ClipToFilterRegion);
+    filter->lastEffect()->determineMaximumEffectRect(ClipToFilterRegion);
 
     FilterData* filterData = FilterData::create();
     filterData->filter = filter;
     filterData->nodeMap = nodeMap;
 
     // TODO(pdr): Can this be moved out of painter?
     m_filter.setFilterDataForLayoutObject(const_cast<LayoutObject*>(&object), filterData);
     return recordingContext.beginContent(filterData);
 }
 
@@ skipping 20 matching lines @@
     if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, object, DisplayItem::kSVGFilter))
         return;
 
     // TODO(chrishtr): stop using an infinite rect, and instead bound the filter.
     LayoutObjectDrawingRecorder recorder(context, object, DisplayItem::kSVGFilter, LayoutRect::infiniteIntRect());
     if (filterData && filterData->m_state == FilterData::ReadyToPaint)
         paintFilteredContent(context, filterData);
 }
 
 } // namespace blink