Harmonize FilterEffect::mapRect and mapPaintRect

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 30 matching lines @@
 
     SkiaImageFilterBuilder::buildSourceGraphic(sourceGraphic, m_context->endRecording());
 
     // Content is cached by the source graphic so temporaries can be freed.
     m_paintController = nullptr;
     m_context = nullptr;
 
     filterData->m_state = FilterData::ReadyToPaint;
 }
 
-static void paintFilteredContent(GraphicsContext& context, FilterData* filterData)
+static void paintFilteredContent(GraphicsContext& context, const LayoutObject& object, FilterData* filterData)
 {
     DCHECK_EQ(filterData->m_state, FilterData::ReadyToPaint);
     DCHECK(filterData->filter->getSourceGraphic());
 
     filterData->m_state = FilterData::PaintingFilter;
 
     FilterEffect* lastEffect = filterData->filter->lastEffect();
     sk_sp<SkImageFilter> imageFilter = SkiaImageFilterBuilder::build(lastEffect, ColorSpaceDeviceRGB);
     context.save();
 
     // Clip drawing of filtered image to the minimum required paint rect.
-    context.clipRect(lastEffect->determineAbsolutePaintRect(lastEffect->absoluteBounds()));
+    context.clipRect(lastEffect->mapRect(object.strokeBoundingBox()));
 
     FloatRect boundaries = filterData->filter->filterRegion();
     context.beginLayer(1, SkXfermode::kSrcOver_Mode, &boundaries, ColorFilterNone, std::move(imageFilter));
     context.endLayer();
     context.restore();
 
     filterData->m_state = FilterData::ReadyToPaint;
 }
 
 GraphicsContext* SVGFilterPainter::prepareEffect(const LayoutObject& object, SVGFilterRecordingContext& recordingContext)
@@ skipping 50 matching lines @@
             filterData->m_state = FilterData::RecordingContent;
     }
 
     GraphicsContext& context = recordingContext.paintingContext();
     if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, object, DisplayItem::kSVGFilter))
         return;
 
     FloatRect filterRegion = filterData ? filterData->filter->filterRegion() : FloatRect();
     LayoutObjectDrawingRecorder recorder(context, object, DisplayItem::kSVGFilter, filterRegion);
     if (filterData && filterData->m_state == FilterData::ReadyToPaint)
-        paintFilteredContent(context, filterData);
+        paintFilteredContent(context, object, filterData);
 }
 
 } // namespace blink