Implement clone() for 4 additional GrFragmentProcessor subclasses

HighContrastFilterEffect
LumaColorFilterEffect
OverdrawFragmentProcessor
RRectsGaussianEdgeFP

Change-Id: Ie843e025e49dd46e3f75a5f79d399ddd3ceba5cd
Reviewed-on: https://skia-review.googlesource.com/26660
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

src/effects/SkHighContrastFilter.cpp

@@ -174,6 +174,8 @@ public:
 
     const SkHighContrastConfig& config() const { return fConfig; }
 
+    sk_sp<GrFragmentProcessor> clone() const override { return Make(fConfig); }
+
 private:
     HighContrastFilterEffect(const SkHighContrastConfig& config)
         : INHERITED(kNone_OptimizationFlags)

src/effects/SkLumaColorFilter.cpp

@@ -51,6 +51,9 @@ public:
 
     const char* name() const override { return "Luminance-to-Alpha"; }
 
+    sk_sp<GrFragmentProcessor> clone() const override { return Make(); }
+
+private:
     class GLSLProcessor : public GrGLSLFragmentProcessor {
     public:
         static void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder*) {}
@@ -75,7 +78,6 @@ public:
         typedef GrGLSLFragmentProcessor INHERITED;
     };
 
-private:
     LumaColorFilterEffect() : INHERITED(kConstantOutputForConstantInput_OptimizationFlag) {
         this->initClassID<LumaColorFilterEffect>();
     }

src/effects/SkOverdrawColorFilter.cpp

@@ -76,6 +76,11 @@ public:
     static sk_sp<GrFragmentProcessor> Make(const SkPMColor* colors);
 
     const char* name() const override { return "Overdraw"; }
+
+    sk_sp<GrFragmentProcessor> clone() const override {
+        return sk_sp<GrFragmentProcessor>(new OverdrawFragmentProcessor(fColors));
+    }
+
 private:
     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
     void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}

src/effects/SkRRectsGaussianEdgeMaskFilter.cpp

@@ -209,9 +209,22 @@ public:
         return sk_sp<GrFragmentProcessor>(new RRectsGaussianEdgeFP(first, second, radius));
     }
 
+    const char* name() const override { return "RRectsGaussianEdgeFP"; }
+
+    sk_sp<GrFragmentProcessor> clone() const override {
+        return sk_sp<GrFragmentProcessor>(new RRectsGaussianEdgeFP(*this));
+    }
+
+    const SkRRect& first() const { return fFirst; }
+    Mode firstMode() const { return fFirstMode; }
+    const SkRRect& second() const { return fSecond; }
+    Mode secondMode() const { return fSecondMode; }
+    SkScalar radius() const { return fRadius; }
+
+private:
     class GLSLRRectsGaussianEdgeFP : public GrGLSLFragmentProcessor {
     public:
-        GLSLRRectsGaussianEdgeFP() { }
+        GLSLRRectsGaussianEdgeFP() {}
 
         // This method emits code so that, for each shape, the distance from the edge is returned
         // in 'outputName' clamped to 0..1 with positive distance being towards the center of the
@@ -447,15 +460,6 @@ public:
         GLSLRRectsGaussianEdgeFP::GenKey(*this, caps, b);
     }
 
-    const char* name() const override { return "RRectsGaussianEdgeFP"; }
-
-    const SkRRect& first() const { return fFirst; }
-    Mode firstMode() const { return fFirstMode; }
-    const SkRRect& second() const { return fSecond; }
-    Mode secondMode() const { return fSecondMode; }
-    SkScalar radius() const { return fRadius; }
-
-private:
     RRectsGaussianEdgeFP(const SkRRect& first, const SkRRect& second, SkScalar radius)
             : INHERITED(kCompatibleWithCoverageAsAlpha_OptimizationFlag)
             , fFirst(first)
@@ -466,6 +470,15 @@ private:
         fFirstMode = ComputeMode(fFirst);
         fSecondMode = ComputeMode(fSecond);
     }
+    RRectsGaussianEdgeFP(const RRectsGaussianEdgeFP& that)
+            : INHERITED(kCompatibleWithCoverageAsAlpha_OptimizationFlag)
+            , fFirst(that.fFirst)
+            , fFirstMode(that.fFirstMode)
+            , fSecond(that.fSecond)
+            , fSecondMode(that.fSecondMode)
+            , fRadius(that.fRadius) {
+        this->initClassID<RRectsGaussianEdgeFP>();
+    }
 
     static Mode ComputeMode(const SkRRect& rr) {
         if (rr.isCircle()) {