Try out operator overloads for Sk2x.

BUG=skia:

Review URL: https://codereview.chromium.org/1024473005

2 files changed, 11 insertions, 4 deletions

diff --git a/src/core/Sk2x.h b/src/core/Sk2x.h
index 99cd45ebe8..5e78c503d5 100644
--- a/src/core/Sk2x.h
+++ b/src/core/Sk2x.h
@@ -49,6 +49,14 @@ public:
     Sk2x subtract(const Sk2x&) const;
     Sk2x multiply(const Sk2x&) const;
 
+    Sk2x operator +(const Sk2x& o) const { return this->add(o); }
+    Sk2x operator -(const Sk2x& o) const { return this->subtract(o); }
+    Sk2x operator *(const Sk2x& o) const { return this->multiply(o); }
+
+    Sk2x& operator +=(const Sk2x& o) { return (*this = *this + o); }
+    Sk2x& operator -=(const Sk2x& o) { return (*this = *this - o); }
+    Sk2x& operator *=(const Sk2x& o) { return (*this = *this * o); }
+
     Sk2x rsqrt() const;   // Approximate 1/this->sqrt().
     Sk2x  sqrt() const;   // this->multiply(this->rsqrt()) may be faster, but less precise.
 
diff --git a/src/core/SkGeometry.cpp b/src/core/SkGeometry.cpp
index 88c4b60cdd..6d14e4bb54 100644
--- a/src/core/SkGeometry.cpp
+++ b/src/core/SkGeometry.cpp
@@ -139,12 +139,11 @@ SkPoint SkEvalQuadAt(const SkPoint src[3], SkScalar t) {
     Sk2f P1 = Sk2f::Load(&src[1].fX);
     Sk2f P2 = Sk2f::Load(&src[2].fX);
 
-    Sk2f A = P2.subtract(P1.add(P1)).add(P0);
-    Sk2f B = P1.subtract(P0);
-    B = B.add(B);
+    Sk2f B = P1 - P0;
+    Sk2f A = P2 - P1 - B;
 
     SkPoint result;
-    A.multiply(t2).add(B).multiply(t2).add(P0).store(&result.fX);
+    ((A * t2 + B+B) * t2 + P0).store(&result.fX);
     return result;
 }