Mike's radial gradient CL with better float -> int.

src/core/SkNx.h

Index: src/core/SkNx.h
diff --git a/src/core/SkNx.h b/src/core/SkNx.h
index 8244e9026cc69436ca754761dea60797250d538a..65b5b97a83e536cc928b897f17653b8c5622143f 100644
--- a/src/core/SkNx.h
+++ b/src/core/SkNx.h
@@ -39,6 +39,7 @@ template <int N, typename T>
 class SkNi {
 public:
     SkNi() {}
+    SkNi(const SkNi<N/2, T>& lo, const SkNi<N/2, T>& hi) : fLo(lo), fHi(hi) {}
     explicit SkNi(T val) : fLo(val), fHi(val) {}
     static SkNi Load(const T vals[N]) {
         return SkNi(SkNi<N/2,T>::Load(vals), SkNi<N/2,T>::Load(vals+N/2));
@@ -69,7 +70,6 @@ public:
 
 private:
     REQUIRE(0 == (N & (N-1)));
-    SkNi(const SkNi<N/2, T>& lo, const SkNi<N/2, T>& hi) : fLo(lo), fHi(hi) {}
 
     SkNi<N/2, T> fLo, fHi;
 };
@@ -77,6 +77,10 @@ private:
 template <int N, typename T>
 class SkNf {
     typedef SkNb<N, sizeof(T)> Nb;
+
+    static int32_t MyNi(float);
+    static int64_t MyNi(double);
+    typedef SkNi<N, decltype(MyNi(T()))> Ni;
 public:
     SkNf() {}
     explicit SkNf(T val) : fLo(val),  fHi(val) {}
@@ -93,6 +97,8 @@ public:
         fHi.store(vals+N/2);
     }
 
+    Ni castTrunc() const { return Ni(fLo.castTrunc(), fHi.castTrunc()); }
+
     SkNf operator + (const SkNf& o) const { return SkNf(fLo + o.fLo, fHi + o.fHi); }
     SkNf operator - (const SkNf& o) const { return SkNf(fLo - o.fLo, fHi - o.fHi); }
     SkNf operator * (const SkNf& o) const { return SkNf(fLo * o.fLo, fHi * o.fHi); }
@@ -172,6 +178,10 @@ private:
 template <typename T>
 class SkNf<1,T> {
     typedef SkNb<1, sizeof(T)> Nb;
+
+    static int32_t MyNi(float);
+    static int64_t MyNi(double);
+    typedef SkNi<1, decltype(MyNi(T()))> Ni;
 public:
     SkNf() {}
     explicit SkNf(T val) : fVal(val) {}
@@ -179,6 +189,8 @@ public:
 
     void store(T vals[1]) const { vals[0] = fVal; }
 
+    Ni castTrunc() const { return Ni(fVal); }
+
     SkNf operator + (const SkNf& o) const { return SkNf(fVal + o.fVal); }
     SkNf operator - (const SkNf& o) const { return SkNf(fVal - o.fVal); }
     SkNf operator * (const SkNf& o) const { return SkNf(fVal * o.fVal); }
@@ -248,4 +260,6 @@ typedef SkNf<4, SkScalar> Sk4s;
 typedef SkNi<4, uint16_t> Sk4h;
 typedef SkNi<8, uint16_t> Sk8h;
 
+typedef SkNi<4, int> Sk4i;
+
 #endif//SkNx_DEFINED