typedef int32_t SkFDot6;
+/* This uses the magic number approach suggested here:
+ * http://stereopsis.com/sree/fpu2006.html and used in
+ * _cairo_fixed_from_double. It does banker's rounding
+ * (i.e. round to nearest even)
+ */
+inline SkFDot6 SkScalarRoundToFDot6(SkScalar x, int shift = 0)
+{
+ union {
+ double fDouble;
+ int32_t fBits[2];
+ } tmp;
+ int fractionalBits = 6 + shift;
+ double magic = (1LL << (52 - (fractionalBits))) * 1.5;
+
+ tmp.fDouble = SkScalarToDouble(x) + magic;
+#ifdef SK_CPU_BENDIAN
+ return tmp.fBits[1];
+#else
+ return tmp.fBits[0];
+#endif
+}
+
#define SK_FDot6One (64)
#define SK_FDot6Half (32)