Handle geometry effects of filters in GeometryMapper

third_party/WebKit/Source/platform/graphics/paint/GeometryMapper.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/GeometryMapper.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/GeometryMapper.cpp b/third_party/WebKit/Source/platform/graphics/paint/GeometryMapper.cpp
index f1152386d922c205c134e28a2a6205bf1992d839..b01fd531d43f2bb1e262a5efbed45009b748a598 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/GeometryMapper.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/GeometryMapper.cpp
@@ -92,6 +92,11 @@ FloatRect GeometryMapper::localToAncestorVisualRectInternal(
     return rect;
   }
 
+  if (localState.effect() != ancestorState.effect()) {
+    return slowLocalToAncestorVisualRectWithEffects(rect, localState,
+                                                    ancestorState, success);
+  }
+
   const auto& transformMatrix = localToAncestorMatrixInternal(
       localState.transform(), ancestorState.transform(), success);
   if (!success)
@@ -117,6 +122,37 @@ FloatRect GeometryMapper::localToAncestorVisualRectInternal(
   return mappedRect;
 }
 
+FloatRect GeometryMapper::slowLocalToAncestorVisualRectWithEffects(
+    const FloatRect& rect,
+    const PropertyTreeState& localState,
+    const PropertyTreeState& ancestorState,
+    bool& success) {
+  PropertyTreeState lastTransformAndClipState(
+      localState.transform(), localState.clip(), nullptr, nullptr);
+  FloatRect result = rect;
+
+  for (const auto* effect = localState.effect();
+       effect && effect != ancestorState.effect(); effect = effect->parent()) {
+    if (!effect->hasFilterThanMovesPixels())
+      continue;
+
+    PropertyTreeState transformAndClipState(
+        effect->localTransformSpace(), effect->outputClip(), nullptr, nullptr);
+    result = sourceToDestinationVisualRectInternal(
+        result, lastTransformAndClipState, transformAndClipState, success);
+    if (!success)
+      return result;
+
+    result = effect->mapRect(result);
+    lastTransformAndClipState = transformAndClipState;
+  }
+
+  PropertyTreeState finalTransformAndClipState(
+      ancestorState.transform(), ancestorState.clip(), nullptr, nullptr);
+  return sourceToDestinationVisualRectInternal(
+      result, lastTransformAndClipState, finalTransformAndClipState, success);
+}
+
 FloatRect GeometryMapper::localToAncestorRect(
     const FloatRect& rect,
     const TransformPaintPropertyNode* localTransformNode,