Merge ReferenceFilter into Filter

Source/platform/graphics/filters/Filter.cpp

Index: Source/platform/graphics/filters/Filter.cpp
diff --git a/Source/platform/graphics/filters/ReferenceFilter.cpp b/Source/platform/graphics/filters/Filter.cpp
similarity index 73%
rename from Source/platform/graphics/filters/ReferenceFilter.cpp
rename to Source/platform/graphics/filters/Filter.cpp
index d483c2d25a6b60270560d2e83949411231156bfc..6aa814174cf3c2b485dbfd493fbab4b508f8ace4 100644
--- a/Source/platform/graphics/filters/ReferenceFilter.cpp
+++ b/Source/platform/graphics/filters/Filter.cpp
@@ -29,32 +29,46 @@
  */
 
 #include "config.h"
-
-#include "platform/graphics/filters/ReferenceFilter.h"
+#include "platform/graphics/filters/Filter.h"
 
 #include "platform/graphics/filters/FilterEffect.h"
 #include "platform/graphics/filters/SourceGraphic.h"
 
 namespace blink {
 
-ReferenceFilter::ReferenceFilter(const FloatRect& targetBoundingBox, const FloatRect& filterRegion, float scale)
-    : Filter(targetBoundingBox, filterRegion, scale)
+Filter::Filter(const FloatRect& referenceBox, const FloatRect& filterRegion, float scale)
+    : m_referenceBox(referenceBox)
+    , m_filterRegion(filterRegion)
+    , m_scale(scale)
     , m_sourceGraphic(SourceGraphic::create(this))
 {
 }
 
-ReferenceFilter::~ReferenceFilter()
+Filter::~Filter()
 {
 }
 
-DEFINE_TRACE(ReferenceFilter)
+DEFINE_TRACE(Filter)
 {
     visitor->trace(m_sourceGraphic);
     visitor->trace(m_lastEffect);
-    Filter::trace(visitor);
 }
 
-void ReferenceFilter::setLastEffect(PassRefPtrWillBeRawPtr<FilterEffect> effect)
+FloatRect Filter::mapLocalRectToAbsoluteRect(const FloatRect& rect) const
+{
+    FloatRect result(rect);
+    result.scale(m_scale);
+    return result;
+}
+
+FloatRect Filter::mapAbsoluteRectToLocalRect(const FloatRect& rect) const
+{
+    FloatRect result(rect);
+    result.scale(1.0f / m_scale);
+    return result;
+}
+
+void Filter::setLastEffect(PassRefPtrWillBeRawPtr<FilterEffect> effect)
 {
     m_lastEffect = effect;
 }