diff --git a/include/core/SkGeometry.h b/include/core/SkGeometry.h
index 26f27babf7..0d1081fb2d 100644
--- a/include/core/SkGeometry.h
+++ b/include/core/SkGeometry.h
@@ -206,4 +206,18 @@ enum SkRotationDirection {
 int SkBuildQuadArc(const SkVector& unitStart, const SkVector& unitStop,
                    SkRotationDirection, const SkMatrix*, SkPoint quadPoints[]);
 
+// experimental
+struct SkRationalQuad {
+    SkPoint  fPts[3];
+    SkScalar fW;
+
+    void set(const SkPoint pts[3], SkScalar w) {
+        memcpy(fPts, pts, 3 * sizeof(SkPoint));
+        fW = w;
+    }
+
+    void evalAt(SkScalar t, SkPoint* pt) const;
+    void chopAt(SkScalar t, SkRationalQuad dst[2]) const;
+};
+
 #endif
diff --git a/src/core/SkGeometry.cpp b/src/core/SkGeometry.cpp
index 0d4a9c79d1..1198cfa628 100644
--- a/src/core/SkGeometry.cpp
+++ b/src/core/SkGeometry.cpp
@@ -1380,3 +1380,36 @@ int SkBuildQuadArc(const SkVector& uStart, const SkVector& uStop,
     matrix.mapPoints(quadPoints, pointCount);
     return pointCount;
 }
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkScalar eval_ratquad(const SkScalar src[], SkScalar w, SkScalar t) {
+    SkASSERT(src);
+    SkASSERT(t >= 0 && t <= SK_Scalar1);
+    
+    SkScalar    src2w = SkScalarMul(src[2], w);
+    SkScalar    C = src[0];
+    SkScalar    A = src[4] - 2 * src2w + C;
+    SkScalar    B = 2 * (src2w - C);
+    SkScalar numer = SkScalarMulAdd(SkScalarMulAdd(A, t, B), t, C);
+
+    B = 2 * (w - SK_Scalar1);
+    C = SK_Scalar1;
+    A = -B;
+    SkScalar denom = SkScalarMulAdd(SkScalarMulAdd(A, t, B), t, C);
+
+    return SkScalarDiv(numer, denom);
+}
+
+void SkRationalQuad::evalAt(SkScalar t, SkPoint* pt) const {
+    SkASSERT(t >= 0 && t <= SK_Scalar1);
+    
+    if (pt) {
+        pt->set(eval_ratquad(&fPts[0].fX, fW, t),
+                eval_ratquad(&fPts[0].fY, fW, t));
+    }
+}
+
+void SkRationalQuad::chopAt(SkScalar t, SkRationalQuad dst[2]) const {
+}
+