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diff --git a/libs/hwui/Matrix.h b/libs/hwui/Matrix.h
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+++ b/libs/hwui/Matrix.h
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+/*
+ * Copyright (C) 2010 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 ANDROID_UI_MATRIX_H
+#define ANDROID_UI_MATRIX_H
+
+#include <SkMatrix.h>
+
+#include "Rect.h"
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Classes
+///////////////////////////////////////////////////////////////////////////////
+
+class Matrix4 {
+public:
+    float data[16];
+
+    Matrix4() {
+        loadIdentity();
+    }
+
+    Matrix4(const float* v) {
+        load(v);
+    }
+
+    Matrix4(const Matrix4& v) {
+        load(v);
+    }
+
+    Matrix4(const SkMatrix& v) {
+        load(v);
+    }
+
+    void loadIdentity();
+
+    void load(const float* v);
+    void load(const Matrix4& v);
+    void load(const SkMatrix& v);
+
+    void loadInverse(const Matrix4& v);
+
+    void loadTranslate(float x, float y, float z);
+    void loadScale(float sx, float sy, float sz);
+    void loadRotate(float angle, float x, float y, float z);
+    void loadMultiply(const Matrix4& u, const Matrix4& v);
+
+    void loadOrtho(float left, float right, float bottom, float top, float near, float far);
+
+    void multiply(const Matrix4& v) {
+        Matrix4 u;
+        u.loadMultiply(*this, v);
+        load(u);
+    }
+
+    void translate(float x, float y, float z) {
+        Matrix4 u;
+        u.loadTranslate(x, y, z);
+        multiply(u);
+    }
+
+    void scale(float sx, float sy, float sz) {
+        Matrix4 u;
+        u.loadScale(sx, sy, sz);
+        multiply(u);
+    }
+
+    void rotate(float angle, float x, float y, float z) {
+        Matrix4 u;
+        u.loadRotate(angle, x, y, z);
+        multiply(u);
+    }
+
+    void copyTo(float* v) const;
+    void copyTo(SkMatrix& v) const;
+
+    /**
+     * Does not apply rotations!
+     */
+    void mapRect(Rect& r) const;
+
+    float getTranslateX();
+    float getTranslateY();
+
+    void dump() const;
+
+private:
+    inline float get(int i, int j) const {
+        return data[i * 4 + j];
+    }
+
+    inline void set(int i, int j, float v) {
+        data[i * 4 + j] = v;
+    }
+}; // class Matrix4
+
+///////////////////////////////////////////////////////////////////////////////
+// Types
+///////////////////////////////////////////////////////////////////////////////
+
+typedef Matrix4 mat4;
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_UI_MATRIX_H