1 files changed, 8 insertions, 0 deletions
diff --git a/src/effects/SkAlphaThresholdFilter.cpp b/src/effects/SkAlphaThresholdFilter.cpp
index 5bd2571842..f09ec50b67 100644
--- a/src/effects/SkAlphaThresholdFilter.cpp
+++ b/src/effects/SkAlphaThresholdFilter.cpp
@@ -31,6 +31,7 @@ public:
                                SkScalar outerThreshold, sk_sp<SkImageFilter> input,
                                const CropRect* cropRect = nullptr);
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkAlphaThresholdFilterImpl)
     friend void SkAlphaThresholdFilter::InitializeFlattenables();
 
@@ -280,3 +281,10 @@ const {
     }
     return this->refMe();
 }
+
+void SkAlphaThresholdFilterImpl::toString(SkString* str) const {
+    str->appendf("SkAlphaThresholdImageFilter: (");
+    str->appendf("inner: %f outer: %f", fInnerThreshold, fOuterThreshold);
+    str->append(")");
+}
+