Revert "remove toString"

This reverts commit 5191880cbf3ee4d122b0d11b4945fbab0784fda7.

Reason for revert: broke flutter

Original change's description:
> remove toString
> 
> toString may have been used by obsolete debugger only
> find out if that is so
> 
> R=​brianosman@google.com,bsalomon@google.com
> 
> Docs-Preview: https://skia.org/?cl=119894
> Bug:830651
> Change-Id: I737f19b7d3fbc869bea2f443fa3b5ed7c1393ffd
> Reviewed-on: https://skia-review.googlesource.com/119894
> Commit-Queue: Cary Clark <caryclark@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,brianosman@google.com,caryclark@google.com,caryclark@skia.org

Change-Id: I9f81de6c3615ee0608bcea9081b77239b4b8816c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 830651
Reviewed-on: https://skia-review.googlesource.com/129340
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>

26 files changed, 247 insertions, 0 deletions

diff --git a/src/shaders/SkColorFilterShader.cpp b/src/shaders/SkColorFilterShader.cpp
index 16bf56522c..0f25518669 100644
--- a/src/shaders/SkColorFilterShader.cpp
+++ b/src/shaders/SkColorFilterShader.cpp
@@ -71,6 +71,19 @@ std::unique_ptr<GrFragmentProcessor> SkColorFilterShader::asFragmentProcessor(
 }
 #endif
 
+void SkColorFilterShader::toString(SkString* str) const {
+    str->append("SkColorFilterShader: (");
+
+    str->append("Shader: ");
+    as_SB(fShader)->toString(str);
+    str->append(" Filter: ");
+    // TODO: add "fFilter->toString(str);" once SkColorFilter::toString is added
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkShader> SkShader::makeWithColorFilter(sk_sp<SkColorFilter> filter) const {
diff --git a/src/shaders/SkColorFilterShader.h b/src/shaders/SkColorFilterShader.h
index d97dd063a5..2f5b4693ee 100644
--- a/src/shaders/SkColorFilterShader.h
+++ b/src/shaders/SkColorFilterShader.h
@@ -21,6 +21,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorFilterShader)
 
 protected:
diff --git a/src/shaders/SkColorShader.cpp b/src/shaders/SkColorShader.cpp
index c3f86b9cfb..152a0b5529 100644
--- a/src/shaders/SkColorShader.cpp
+++ b/src/shaders/SkColorShader.cpp
@@ -97,6 +97,17 @@ std::unique_ptr<GrFragmentProcessor> SkColorShader::asFragmentProcessor(
 
 #endif
 
+void SkColorShader::toString(SkString* str) const {
+    str->append("SkColorShader: (");
+
+    str->append("Color: ");
+    str->appendHex(fColor);
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
@@ -212,6 +223,16 @@ std::unique_ptr<GrFragmentProcessor> SkColor4Shader::asFragmentProcessor(
 
 #endif
 
+void SkColor4Shader::toString(SkString* str) const {
+    str->append("SkColor4Shader: (");
+
+    str->append("RGBA:");
+    for (int i = 0; i < 4; ++i) {
+        str->appendf(" %g", fColor4.vec()[i]);
+    }
+    str->append(" )");
+}
+
 sk_sp<SkShader> SkColor4Shader::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
     return SkShader::MakeColorShader(xformer->apply(fCachedByteColor));
 }
diff --git a/src/shaders/SkColorShader.h b/src/shaders/SkColorShader.h
index 235f8e330a..9fab094996 100644
--- a/src/shaders/SkColorShader.h
+++ b/src/shaders/SkColorShader.h
@@ -50,6 +50,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorShader)
 
 protected:
@@ -105,6 +106,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorShader)
 
 protected:
diff --git a/src/shaders/SkComposeShader.cpp b/src/shaders/SkComposeShader.cpp
index 845d320490..e7125ad966 100644
--- a/src/shaders/SkComposeShader.cpp
+++ b/src/shaders/SkComposeShader.cpp
@@ -141,3 +141,18 @@ std::unique_ptr<GrFragmentProcessor> SkComposeShader::asFragmentProcessor(
                                                               std::move(fpA), fMode);
 }
 #endif
+
+void SkComposeShader::toString(SkString* str) const {
+    str->append("SkComposeShader: (");
+
+    str->append("dst: ");
+    as_SB(fDst)->toString(str);
+    str->append(" src: ");
+    as_SB(fSrc)->toString(str);
+    str->appendf(" mode: %s", SkBlendMode_Name(fMode));
+    str->appendf(" lerpT: %g", fLerpT);
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
diff --git a/src/shaders/SkComposeShader.h b/src/shaders/SkComposeShader.h
index c2dc2c3984..9208502613 100644
--- a/src/shaders/SkComposeShader.h
+++ b/src/shaders/SkComposeShader.h
@@ -35,6 +35,7 @@ public:
     bool asACompose(ComposeRec* rec) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader)
 
 protected:
diff --git a/src/shaders/SkEmptyShader.h b/src/shaders/SkEmptyShader.h
index 7956003625..12848b3738 100644
--- a/src/shaders/SkEmptyShader.h
+++ b/src/shaders/SkEmptyShader.h
@@ -20,6 +20,7 @@ class SkEmptyShader : public SkShaderBase {
 public:
     SkEmptyShader() {}
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkEmptyShader)
 
 protected:
diff --git a/src/shaders/SkImageShader.cpp b/src/shaders/SkImageShader.cpp
index 7744f89be9..8ef647f5c9 100644
--- a/src/shaders/SkImageShader.cpp
+++ b/src/shaders/SkImageShader.cpp
@@ -173,6 +173,17 @@ sk_sp<SkShader> SkImageShader::Make(sk_sp<SkImage> image,
     return sk_sp<SkShader>{ new SkImageShader(image, tx,ty, localMatrix, clampAsIfUnpremul) };
 }
 
+void SkImageShader::toString(SkString* str) const {
+    const char* gTileModeName[SkShader::kTileModeCount] = {
+        "clamp", "repeat", "mirror"
+    };
+
+    str->appendf("ImageShader: ((%s %s) ", gTileModeName[fTileModeX], gTileModeName[fTileModeY]);
+    fImage->toString(str);
+    this->INHERITED::toString(str);
+    str->append(")");
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU
diff --git a/src/shaders/SkImageShader.h b/src/shaders/SkImageShader.h
index 0d40c23ea4..3e980d38f4 100644
--- a/src/shaders/SkImageShader.h
+++ b/src/shaders/SkImageShader.h
@@ -23,6 +23,7 @@ public:
 
     bool isOpaque() const override;
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkImageShader)
 
 #if SK_SUPPORT_GPU
diff --git a/src/shaders/SkLocalMatrixShader.cpp b/src/shaders/SkLocalMatrixShader.cpp
index 28d7775b27..509c66d43e 100644
--- a/src/shaders/SkLocalMatrixShader.cpp
+++ b/src/shaders/SkLocalMatrixShader.cpp
@@ -71,6 +71,16 @@ bool SkLocalMatrixShader::onAppendStages(const StageRec& rec) const {
     return as_SB(fProxyShader)->appendStages(newRec);
 }
 
+void SkLocalMatrixShader::toString(SkString* str) const {
+    str->append("SkLocalMatrixShader: (");
+
+    as_SB(fProxyShader)->toString(str);
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
+
 sk_sp<SkShader> SkShader::makeWithLocalMatrix(const SkMatrix& localMatrix) const {
     if (localMatrix.isIdentity()) {
         return sk_ref_sp(const_cast<SkShader*>(this));
diff --git a/src/shaders/SkLocalMatrixShader.h b/src/shaders/SkLocalMatrixShader.h
index 9f89812139..48d1ef17a9 100644
--- a/src/shaders/SkLocalMatrixShader.h
+++ b/src/shaders/SkLocalMatrixShader.h
@@ -38,6 +38,7 @@ public:
         return fProxyShader;
     }
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLocalMatrixShader)
 
 protected:
diff --git a/src/shaders/SkPerlinNoiseShader.cpp b/src/shaders/SkPerlinNoiseShader.cpp
index b3dc9d428f..d864e165e5 100644
--- a/src/shaders/SkPerlinNoiseShader.cpp
+++ b/src/shaders/SkPerlinNoiseShader.cpp
@@ -364,6 +364,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPerlinNoiseShaderImpl)
 
 protected:
@@ -1476,6 +1477,37 @@ std::unique_ptr<GrFragmentProcessor> SkPerlinNoiseShaderImpl::asFragmentProcesso
 
 #endif
 
+void SkPerlinNoiseShaderImpl::toString(SkString* str) const {
+    str->append("SkPerlinNoiseShaderImpl: (");
+
+    str->append("type: ");
+    switch (fType) {
+        case kFractalNoise_Type:
+            str->append("\"fractal noise\"");
+            break;
+        case kTurbulence_Type:
+            str->append("\"turbulence\"");
+            break;
+        default:
+            str->append("\"unknown\"");
+            break;
+    }
+    str->append(" base frequency: (");
+    str->appendScalar(fBaseFrequencyX);
+    str->append(", ");
+    str->appendScalar(fBaseFrequencyY);
+    str->append(") number of octaves: ");
+    str->appendS32(fNumOctaves);
+    str->append(" seed: ");
+    str->appendScalar(fSeed);
+    str->append(" stitch tiles: ");
+    str->append(fStitchTiles ? "true " : "false ");
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 static bool valid_input(SkScalar baseX, SkScalar baseY, int numOctaves, const SkISize* tileSize,
diff --git a/src/shaders/SkPictureShader.cpp b/src/shaders/SkPictureShader.cpp
index 576598bfe6..f958814ca1 100644
--- a/src/shaders/SkPictureShader.cpp
+++ b/src/shaders/SkPictureShader.cpp
@@ -338,6 +338,22 @@ void SkPictureShader::PictureShaderContext::shadeSpan(int x, int y, SkPMColor ds
     fBitmapShaderContext->shadeSpan(x, y, dstC, count);
 }
 
+void SkPictureShader::toString(SkString* str) const {
+    static const char* gTileModeName[SkShader::kTileModeCount] = {
+        "clamp", "repeat", "mirror"
+    };
+
+    str->appendf("PictureShader: [%f:%f:%f:%f] ",
+                 fPicture->cullRect().fLeft,
+                 fPicture->cullRect().fTop,
+                 fPicture->cullRect().fRight,
+                 fPicture->cullRect().fBottom);
+
+    str->appendf("(%s, %s)", gTileModeName[fTmx], gTileModeName[fTmy]);
+
+    this->INHERITED::toString(str);
+}
+
 #if SK_SUPPORT_GPU
 std::unique_ptr<GrFragmentProcessor> SkPictureShader::asFragmentProcessor(
         const GrFPArgs& args) const {
diff --git a/src/shaders/SkPictureShader.h b/src/shaders/SkPictureShader.h
index 25fe53feb5..6e5201e8fb 100644
--- a/src/shaders/SkPictureShader.h
+++ b/src/shaders/SkPictureShader.h
@@ -28,6 +28,7 @@ public:
     static sk_sp<SkShader> Make(sk_sp<SkPicture>, TileMode, TileMode, const SkMatrix*,
                                 const SkRect*);
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader)
 
 #if SK_SUPPORT_GPU
diff --git a/src/shaders/SkShader.cpp b/src/shaders/SkShader.cpp
index a17cca191c..f3ffd26ef4 100644
--- a/src/shaders/SkShader.cpp
+++ b/src/shaders/SkShader.cpp
@@ -208,6 +208,13 @@ sk_sp<SkShader> SkShader::MakePictureShader(sk_sp<SkPicture> src, TileMode tmx,
     return SkPictureShader::Make(std::move(src), tmx, tmy, localMatrix, tile);
 }
 
+void SkShaderBase::toString(SkString* str) const {
+    if (!fLocalMatrix.isIdentity()) {
+        str->append(" ");
+        fLocalMatrix.toString(str);
+    }
+}
+
 bool SkShaderBase::appendStages(const StageRec& rec) const {
     return this->onAppendStages(rec);
 }
@@ -251,3 +258,13 @@ bool SkShaderBase::onAppendStages(const StageRec& rec) const {
 sk_sp<SkFlattenable> SkEmptyShader::CreateProc(SkReadBuffer&) {
     return SkShader::MakeEmptyShader();
 }
+
+#include "SkEmptyShader.h"
+
+void SkEmptyShader::toString(SkString* str) const {
+    str->append("SkEmptyShader: (");
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
diff --git a/src/shaders/SkShaderBase.h b/src/shaders/SkShaderBase.h
index d0b830b6a2..cddc5540ee 100644
--- a/src/shaders/SkShaderBase.h
+++ b/src/shaders/SkShaderBase.h
@@ -207,6 +207,8 @@ public:
         return nullptr;
     }
 
+    virtual void toString(SkString* str) const;
+
     SK_DEFINE_FLATTENABLE_TYPE(SkShaderBase)
     SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
 
diff --git a/src/shaders/gradients/SkGradientShader.cpp b/src/shaders/gradients/SkGradientShader.cpp
index eea70ca847..78f514c1c6 100644
--- a/src/shaders/gradients/SkGradientShader.cpp
+++ b/src/shaders/gradients/SkGradientShader.cpp
@@ -626,6 +626,38 @@ void SkGradientShaderBase::commonAsAGradient(GradientInfo* info) const {
     }
 }
 
+void SkGradientShaderBase::toString(SkString* str) const {
+
+    str->appendf("%d colors: ", fColorCount);
+
+    for (int i = 0; i < fColorCount; ++i) {
+        str->appendHex(this->getLegacyColor(i), 8);
+        if (i < fColorCount-1) {
+            str->append(", ");
+        }
+    }
+
+    if (fColorCount > 2) {
+        str->append(" points: (");
+        for (int i = 0; i < fColorCount; ++i) {
+            str->appendScalar(this->getPos(i));
+            if (i < fColorCount-1) {
+                str->append(", ");
+            }
+        }
+        str->append(")");
+    }
+
+    static const char* gTileModeName[SkShader::kTileModeCount] = {
+        "clamp", "repeat", "mirror", "decal",
+    };
+
+    str->append(" ");
+    str->append(gTileModeName[fTileMode]);
+
+    this->INHERITED::toString(str);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
diff --git a/src/shaders/gradients/SkGradientShaderPriv.h b/src/shaders/gradients/SkGradientShaderPriv.h
index e50f1a69e4..dccb4e70cb 100644
--- a/src/shaders/gradients/SkGradientShaderPriv.h
+++ b/src/shaders/gradients/SkGradientShaderPriv.h
@@ -80,6 +80,7 @@ protected:
 
     SkGradientShaderBase(SkReadBuffer& );
     void flatten(SkWriteBuffer&) const override;
+    void toString(SkString* str) const override;
 
     void commonAsAGradient(GradientInfo*) const;
 
diff --git a/src/shaders/gradients/SkLinearGradient.cpp b/src/shaders/gradients/SkLinearGradient.cpp
index 34cac269f5..a377442dc4 100644
--- a/src/shaders/gradients/SkLinearGradient.cpp
+++ b/src/shaders/gradients/SkLinearGradient.cpp
@@ -207,4 +207,14 @@ std::unique_ptr<GrFragmentProcessor> SkLinearGradient::asFragmentProcessor(
 
 #endif
 
+void SkLinearGradient::toString(SkString* str) const {
+    str->append("SkLinearGradient (");
+
+    str->appendf("start: (%f, %f)", fStart.fX, fStart.fY);
+    str->appendf(" end: (%f, %f) ", fEnd.fX, fEnd.fY);
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
 
diff --git a/src/shaders/gradients/SkLinearGradient.h b/src/shaders/gradients/SkLinearGradient.h
index d100a1cf30..111ed99744 100644
--- a/src/shaders/gradients/SkLinearGradient.h
+++ b/src/shaders/gradients/SkLinearGradient.h
@@ -19,6 +19,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLinearGradient)
 
 protected:
diff --git a/src/shaders/gradients/SkRadialGradient.cpp b/src/shaders/gradients/SkRadialGradient.cpp
index ec0f8a0f95..6d193615a4 100644
--- a/src/shaders/gradients/SkRadialGradient.cpp
+++ b/src/shaders/gradients/SkRadialGradient.cpp
@@ -185,3 +185,19 @@ void SkRadialGradient::appendGradientStages(SkArenaAlloc*, SkRasterPipeline* p,
                                             SkRasterPipeline*) const {
     p->append(SkRasterPipeline::xy_to_radius);
 }
+
+void SkRadialGradient::toString(SkString* str) const {
+    str->append("SkRadialGradient: (");
+
+    str->append("center: (");
+    str->appendScalar(fCenter.fX);
+    str->append(", ");
+    str->appendScalar(fCenter.fY);
+    str->append(") radius: ");
+    str->appendScalar(fRadius);
+    str->append(" ");
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
diff --git a/src/shaders/gradients/SkRadialGradient.h b/src/shaders/gradients/SkRadialGradient.h
index d6963f6971..b0d6854221 100644
--- a/src/shaders/gradients/SkRadialGradient.h
+++ b/src/shaders/gradients/SkRadialGradient.h
@@ -19,6 +19,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkRadialGradient)
 
 protected:
diff --git a/src/shaders/gradients/SkSweepGradient.cpp b/src/shaders/gradients/SkSweepGradient.cpp
index cfce5fe025..c409d9a4e1 100644
--- a/src/shaders/gradients/SkSweepGradient.cpp
+++ b/src/shaders/gradients/SkSweepGradient.cpp
@@ -241,6 +241,20 @@ sk_sp<SkShader> SkSweepGradient::onMakeColorSpace(SkColorSpaceXformer* xformer)
                                        fGradFlags, &this->getLocalMatrix());
 }
 
+void SkSweepGradient::toString(SkString* str) const {
+    str->append("SkSweepGradient: (");
+
+    str->append("center: (");
+    str->appendScalar(fCenter.fX);
+    str->append(", ");
+    str->appendScalar(fCenter.fY);
+    str->append(") ");
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
+
 void SkSweepGradient::appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* p,
                                            SkRasterPipeline*) const {
     p->append(SkRasterPipeline::xy_to_unit_angle);
diff --git a/src/shaders/gradients/SkSweepGradient.h b/src/shaders/gradients/SkSweepGradient.h
index a58c95752d..dce9a3561b 100644
--- a/src/shaders/gradients/SkSweepGradient.h
+++ b/src/shaders/gradients/SkSweepGradient.h
@@ -20,6 +20,7 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSweepGradient)
 
 protected:
diff --git a/src/shaders/gradients/SkTwoPointConicalGradient.cpp b/src/shaders/gradients/SkTwoPointConicalGradient.cpp
index 7d5026bc22..73ec3f213b 100644
--- a/src/shaders/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/shaders/gradients/SkTwoPointConicalGradient.cpp
@@ -199,6 +199,31 @@ sk_sp<SkShader> SkTwoPointConicalGradient::onMakeColorSpace(SkColorSpaceXformer*
                                                  fTileMode, fGradFlags, &this->getLocalMatrix());
 }
 
+
+void SkTwoPointConicalGradient::toString(SkString* str) const {
+    str->append("SkTwoPointConicalGradient: (");
+
+    str->append("center1: (");
+    str->appendScalar(fCenter1.fX);
+    str->append(", ");
+    str->appendScalar(fCenter1.fY);
+    str->append(") radius1: ");
+    str->appendScalar(fRadius1);
+    str->append(" ");
+
+    str->append("center2: (");
+    str->appendScalar(fCenter2.fX);
+    str->append(", ");
+    str->appendScalar(fCenter2.fY);
+    str->append(") radius2: ");
+    str->appendScalar(fRadius2);
+    str->append(" ");
+
+    this->INHERITED::toString(str);
+
+    str->append(")");
+}
+
 void SkTwoPointConicalGradient::appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* p,
                                                      SkRasterPipeline* postPipeline) const {
     const auto dRadius = fRadius2 - fRadius1;
diff --git a/src/shaders/gradients/SkTwoPointConicalGradient.h b/src/shaders/gradients/SkTwoPointConicalGradient.h
index b965e15038..f0d341f17c 100644
--- a/src/shaders/gradients/SkTwoPointConicalGradient.h
+++ b/src/shaders/gradients/SkTwoPointConicalGradient.h
@@ -65,6 +65,7 @@ public:
     const SkMatrix& getGradientMatrix() const { return fPtsToUnit; }
     const FocalData& getFocalData() const { return fFocalData; }
 
+    void toString(SkString* str) const override;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
 
 protected: