Fixes the rendering of a SVG filter (e.g. feFlood) by testing against total

Source/platform/graphics/filters/FilterEffect.h

 /*
  * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * 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.
@@ skipping 19 matching lines @@
 #include "platform/graphics/ColorSpace.h"
 
 #include "third_party/skia/include/core/SkImageFilter.h"
 
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Uint8ClampedArray.h"
 #include "wtf/Vector.h"
 
-static const float kMaxFilterSize = 5000.0f;
-
 namespace WebCore {
 
 class Filter;
 class FilterEffect;
 class ImageBuffer;
 class TextStream;
 
 class SkiaImageFilterBuilder;
 
 typedef Vector<RefPtr<FilterEffect> > FilterEffectVector;
@@ skipping 10 matching lines @@
     MapRectForward = 1,
     ClipToFilterRegion = 1 << 1
 };
 
 typedef int DetermineSubregionFlags;
 
 class PLATFORM_EXPORT FilterEffect : public RefCounted<FilterEffect> {
 public:
     virtual ~FilterEffect();
 
+    static bool isFilterSizeValid(const IntRect&);
+    static bool isFilterSizeValid(const FloatRect&);
+    static float maxFilterArea();
+
     void clearResult();
     void clearResultsRecursive();
 
     ImageBuffer* asImageBuffer();
     PassRefPtr<Uint8ClampedArray> asUnmultipliedImage(const IntRect&);
     PassRefPtr<Uint8ClampedArray> asPremultipliedImage(const IntRect&);
     void copyUnmultipliedImage(Uint8ClampedArray* destination, const IntRect&);
     void copyPremultipliedImage(Uint8ClampedArray* destination, const IntRect&);
 
     FilterEffectVector& inputEffects() { return m_inputEffects; }
@@ skipping 90 matching lines @@
     void transformResultColorSpace(ColorSpace);
 
     FloatRect determineFilterPrimitiveSubregion(DetermineSubregionFlags = DetermineSubregionNone);
     void determineAllAbsolutePaintRects();
 
     virtual FloatRect determineAbsolutePaintRect(const FloatRect& requestedAbsoluteRect);
     virtual bool affectsTransparentPixels() { return false; }
 
 protected:
     FilterEffect(Filter*);
-
     ImageBuffer* createImageBufferResult();
     Uint8ClampedArray* createUnmultipliedImageResult();
     Uint8ClampedArray* createPremultipliedImageResult();
 
     Color adaptColorToOperatingColorSpace(const Color& deviceColor);
 
     // Return true if the filter will only operate correctly on valid RGBA values, with
     // alpha in [0,255] and each color component in [0, alpha].
     virtual bool requiresValidPreMultipliedPixels() { return true; }
 
@@ skipping 42 matching lines @@
     // Should the effect clip to its primitive region, or expand to use the combined region of its inputs.
     bool m_clipsToBounds;
 
     ColorSpace m_operatingColorSpace;
     ColorSpace m_resultColorSpace;
 };
 
 } // namespace WebCore
 
 #endif // FilterEffect_h