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diff --git a/src/animator/SkOperandInterpolator.h b/src/animator/SkOperandInterpolator.h
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+++ b/src/animator/SkOperandInterpolator.h
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+/* libs/graphics/animator/SkOperandInterpolator.h
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#ifndef SkOperandInterpolator_DEFINED
+#define SkOperandInterpolator_DEFINED
+
+#include "SkDisplayType.h"
+#include "SkInterpolator.h"
+#include "SkOperand.h"
+
+class SkOperandInterpolator : public SkInterpolatorBase {
+public:
+    SkOperandInterpolator();
+    SkOperandInterpolator(int elemCount, int frameCount, SkDisplayTypes type);
+    SkOperand* getValues() { return fValues; }
+    int getValuesCount() { return fFrameCount * fElemCount; }
+    void    reset(int elemCount, int frameCount, SkDisplayTypes type);
+
+    /** Add or replace a key frame, copying the values[] data into the interpolator.
+        @param index    The index of this frame (frames must be ordered by time)
+        @param time The millisecond time for this frame
+        @param values   The array of values [elemCount] for this frame. The data is copied
+                        into the interpolator.
+        @param blend    A positive scalar specifying how to blend between this and the next key frame.
+                        [0...1) is a cubic lag/log/lag blend (slow to change at the beginning and end)
+                        1 is a linear blend (default)
+                        (1...inf) is a cubic log/lag/log blend (fast to change at the beginning and end)
+    */
+    bool    setKeyFrame(int index, SkMSec time, const SkOperand values[], SkScalar blend = SK_Scalar1);
+    Result timeToValues(SkMSec time, SkOperand values[]) const;
+    SkDEBUGCODE(static void UnitTest();)
+private:
+    SkDisplayTypes fType;
+    SkOperand* fValues;     // pointer into fStorage
+#ifdef SK_DEBUG
+    SkOperand(* fValuesArray)[10];
+#endif
+    typedef SkInterpolatorBase INHERITED;
+};
+
+#endif // SkOperandInterpolator_DEFINED
+