Let clients of FilterEffectBuilder compute/provide the reference-box

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.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 "modules/canvas2d/CanvasRenderingContext2DState.h"
 
 #include "core/css/CSSFontSelector.h"
 #include "core/css/resolver/FilterOperationResolver.h"
 #include "core/css/resolver/StyleBuilder.h"
 #include "core/css/resolver/StyleResolverState.h"
@@ skipping 300 matching lines @@
         FilterEffectBuilder* filterEffectBuilder = FilterEffectBuilder::create();
 
         // We can't reuse m_fillPaint and m_strokePaint for the filter, since these incorporate
         // the global alpha, which isn't applicable here.
         SkPaint fillPaintForFilter;
         SkPaint strokePaintForFilter;
         m_fillStyle->applyToPaint(fillPaintForFilter);
         m_strokeStyle->applyToPaint(strokePaintForFilter);
         fillPaintForFilter.setColor(m_fillStyle->paintColor());
         strokePaintForFilter.setColor(m_strokeStyle->paintColor());
-        FloatSize floatCanvasSize(canvasSize);
+        FloatRect referenceBox((FloatPoint()), FloatSize(canvasSize));
         const double effectiveZoom = 1.0; // Deliberately ignore zoom on the canvas element
-        filterEffectBuilder->build(styleResolutionHost, filterStyle->filter(), effectiveZoom, &floatCanvasSize, &fillPaintForFilter, &strokePaintForFilter);
+        filterEffectBuilder->build(styleResolutionHost, filterStyle->filter(), effectiveZoom, referenceBox, &fillPaintForFilter, &strokePaintForFilter);
 
         if (FilterEffect* lastEffect = filterEffectBuilder->lastEffect()) {
             m_resolvedFilter = SkiaImageFilterBuilder::build(lastEffect, ColorSpaceDeviceRGB);
             if (m_resolvedFilter) {
                 updateFilterReferences(toHTMLCanvasElement(styleResolutionHost), context, filterStyle->filter());
                 if (lastEffect->originTainted())
                     context->setOriginTainted();
             }
         }
     }
@@ skipping 226 matching lines @@
         paint->setLooper(0);
         paint->setImageFilter(shadowAndForegroundImageFilter());
         return paint;
     }
     paint->setLooper(sk_ref_sp(shadowAndForegroundDrawLooper()));
     paint->setImageFilter(0);
     return paint;
 }
 
 } // namespace blink