Merge "Reimplement the native matrix method using the new delegate way."
diff --git a/tools/layoutlib/bridge/.classpath b/tools/layoutlib/bridge/.classpath
index 70140d8..d3bcb6c 100644
--- a/tools/layoutlib/bridge/.classpath
+++ b/tools/layoutlib/bridge/.classpath
@@ -6,7 +6,7 @@
 	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/3"/>
 	<classpathentry kind="var" path="ANDROID_SRC/prebuilt/common/layoutlib_api/layoutlib_api-prebuilt.jar"/>
 	<classpathentry kind="var" path="ANDROID_SRC/prebuilt/common/kxml2/kxml2-2.3.0.jar" sourcepath="/ANDROID_SRC/dalvik/libcore/xml/src/main/java"/>
-	<classpathentry kind="var" path="ANDROID_OUT_FRAMEWORK/layoutlib.jar" sourcepath="/ANDROID_SRC/frameworks/base/core/java"/>
+	<classpathentry kind="var" path="ANDROID_PLAT_OUT_FRAMEWORK/layoutlib.jar" sourcepath="/ANDROID_PLAT_SRC/frameworks/base"/>
 	<classpathentry kind="var" path="ANDROID_OUT_FRAMEWORK/ninepatch.jar" sourcepath="/ANDROID_SRC/development/tools/ninepatch/src"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/tools/layoutlib/bridge/src/android/graphics/Canvas.java b/tools/layoutlib/bridge/src/android/graphics/Canvas.java
index 1e1aba9..0dccc0d6 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Canvas.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Canvas.java
@@ -18,13 +18,6 @@
 
 import com.android.layoutlib.api.ILayoutLog;
 
-import android.graphics.DrawFilter;
-import android.graphics.Picture;
-import android.graphics.PorterDuff;
-import android.graphics.Rect;
-import android.graphics.RectF;
-import android.graphics.Region;
-import android.graphics.Xfermode;
 import android.graphics.Paint.Align;
 import android.graphics.Paint.FontInfo;
 import android.graphics.Paint.Style;
@@ -42,8 +35,6 @@
 import java.util.List;
 import java.util.Stack;
 
-import javax.microedition.khronos.opengles.GL;
-
 /**
  * Re-implementation of the Canvas, 100% in java on top of a BufferedImage.
  */
@@ -509,7 +500,7 @@
             // get the Graphics2D current matrix
             AffineTransform currentTx = g.getTransform();
             // get the AffineTransform from the matrix
-            AffineTransform matrixTx = matrix.getTransform();
+            AffineTransform matrixTx = Matrix_Delegate.getAffineTransform(matrix);
 
             // combine them so that the matrix is applied after.
             currentTx.preConcatenate(matrixTx);
@@ -969,9 +960,9 @@
         Graphics2D g = getGraphics2d();
 
         // and apply the matrix
-        g.setTransform(matrix.getTransform());
+        g.setTransform(Matrix_Delegate.getAffineTransform(matrix));
 
-        if (mLogger != null && matrix.hasPerspective()) {
+        if (mLogger != null && Matrix_Delegate.hasPerspective(matrix)) {
             mLogger.warning("android.graphics.Canvas#setMatrix(android.graphics.Matrix) only supports affine transformations in the Layout Editor.");
         }
     }
@@ -987,7 +978,7 @@
         // get its current matrix
         AffineTransform currentTx = g.getTransform();
         // get the AffineTransform of the given matrix
-        AffineTransform matrixTx = matrix.getTransform();
+        AffineTransform matrixTx = Matrix_Delegate.getAffineTransform(matrix);
 
         // combine them so that the given matrix is applied after.
         currentTx.preConcatenate(matrixTx);
diff --git a/tools/layoutlib/bridge/src/android/graphics/Matrix.java b/tools/layoutlib/bridge/src/android/graphics/Matrix.java
deleted file mode 100644
index 9e30671..0000000
--- a/tools/layoutlib/bridge/src/android/graphics/Matrix.java
+++ /dev/null
@@ -1,1032 +0,0 @@
-/*
- * Copyright (C) 2008 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.
- */
-
-package android.graphics;
-
-import java.awt.geom.AffineTransform;
-import java.awt.geom.NoninvertibleTransformException;
-
-
-/**
- * A matrix implementation overridden by the LayoutLib bridge.
- */
-public class Matrix extends _Original_Matrix {
-
-    float mValues[] = new float[9];
-
-    /**
-     * Create an identity matrix
-     */
-    public Matrix() {
-        reset();
-    }
-
-    /**
-     * Create a matrix that is a (deep) copy of src
-     * @param src The matrix to copy into this matrix
-     */
-    public Matrix(Matrix src) {
-        set(src);
-    }
-
-    /**
-     * Creates a Matrix object from the float array. The array becomes the internal storage
-     * of the object.
-     * @param data
-     */
-    private Matrix(float[] data) {
-        assert data.length != 9;
-        mValues = data;
-    }
-
-    //---------- Custom Methods
-
-    /**
-     * Adds the given transformation to the current Matrix
-     * <p/>This in effect does this = this*matrix
-     * @param matrix
-     */
-    private void addTransform(float[] matrix) {
-        float[] tmp = new float[9];
-
-        // first row
-        tmp[0] = matrix[0] * mValues[0] + matrix[1] * mValues[3] + matrix[2] * mValues[6];
-        tmp[1] = matrix[0] * mValues[1] + matrix[1] * mValues[4] + matrix[2] * mValues[7];
-        tmp[2] = matrix[0] * mValues[2] + matrix[1] * mValues[5] + matrix[2] * mValues[8];
-
-        // 2nd row
-        tmp[3] = matrix[3] * mValues[0] + matrix[4] * mValues[3] + matrix[5] * mValues[6];
-        tmp[4] = matrix[3] * mValues[1] + matrix[4] * mValues[4] + matrix[5] * mValues[7];
-        tmp[5] = matrix[3] * mValues[2] + matrix[4] * mValues[5] + matrix[5] * mValues[8];
-
-        // 3rd row
-        tmp[6] = matrix[6] * mValues[0] + matrix[7] * mValues[3] + matrix[8] * mValues[6];
-        tmp[7] = matrix[6] * mValues[1] + matrix[7] * mValues[4] + matrix[8] * mValues[7];
-        tmp[8] = matrix[6] * mValues[2] + matrix[7] * mValues[5] + matrix[8] * mValues[8];
-
-        // copy the result over to mValues
-        mValues = tmp;
-    }
-
-    public AffineTransform getTransform() {
-        // the AffineTransform constructor takes the value in a different order
-        // for a matrix [ 0 1 2 ]
-        //              [ 3 4 5 ]
-        // the order is 0, 3, 1, 4, 2, 5...
-        return new AffineTransform(mValues[0], mValues[3], mValues[1],
-                mValues[4], mValues[2], mValues[5]);
-    }
-
-    public boolean hasPerspective() {
-        return (mValues[6] != 0 || mValues[7] != 0 || mValues[8] != 1);
-    }
-
-    //----------
-
-    /**
-     * Returns true if the matrix is identity.
-     * This maybe faster than testing if (getType() == 0)
-     */
-    @Override
-    public boolean isIdentity() {
-        for (int i = 0, k = 0; i < 3; i++) {
-            for (int j = 0; j < 3; j++, k++) {
-                if (mValues[k] != ((i==j) ? 1 : 0)) {
-                    return false;
-                }
-            }
-        }
-
-        return true;
-    }
-
-    /**
-     * Returns true if will map a rectangle to another rectangle. This can be
-     * true if the matrix is identity, scale-only, or rotates a multiple of 90
-     * degrees.
-     */
-    @Override
-    public boolean rectStaysRect() {
-        return (computeTypeMask() & kRectStaysRect_Mask) != 0;
-    }
-
-    /**
-     * (deep) copy the src matrix into this matrix. If src is null, reset this
-     * matrix to the identity matrix.
-     */
-    public void set(Matrix src) {
-        if (src == null) {
-            reset();
-        } else {
-            System.arraycopy(src.mValues, 0, mValues, 0, mValues.length);
-        }
-    }
-
-    @Override
-    public void set(_Original_Matrix src) {
-        throw new UnsupportedOperationException("CALL TO PARENT FORBIDDEN");
-    }
-
-    /** Returns true if obj is a Matrix and its values equal our values.
-    */
-    @Override
-    public boolean equals(Object obj) {
-        if (obj != null && obj instanceof Matrix) {
-            Matrix matrix = (Matrix)obj;
-            for (int i = 0 ; i < 9 ; i++) {
-                if (mValues[i] != matrix.mValues[i]) {
-                    return false;
-                }
-            }
-
-            return true;
-        }
-
-        return false;
-    }
-
-    /** Set the matrix to identity */
-    @Override
-    public void reset() {
-        for (int i = 0, k = 0; i < 3; i++) {
-            for (int j = 0; j < 3; j++, k++) {
-                mValues[k] = ((i==j) ? 1 : 0);
-            }
-        }
-    }
-
-    /** Set the matrix to translate by (dx, dy). */
-    @Override
-    public void setTranslate(float dx, float dy) {
-        mValues[0] = 1;
-        mValues[1] = 0;
-        mValues[2] = dx;
-        mValues[3] = 0;
-        mValues[4] = 1;
-        mValues[5] = dy;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-    }
-
-    /**
-     * Set the matrix to scale by sx and sy, with a pivot point at (px, py).
-     * The pivot point is the coordinate that should remain unchanged by the
-     * specified transformation.
-     */
-    @Override
-    public void setScale(float sx, float sy, float px, float py) {
-        // TODO: do it in one pass
-
-        // translate so that the pivot is in 0,0
-        mValues[0] = 1;
-        mValues[1] = 0;
-        mValues[2] = -px;
-        mValues[3] = 0;
-        mValues[4] = 1;
-        mValues[5] = -py;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-
-        // scale
-        addTransform(new float[] { sx, 0, 0, 0, sy, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-    }
-
-    /** Set the matrix to scale by sx and sy. */
-    @Override
-    public void setScale(float sx, float sy) {
-        mValues[0] = sx;
-        mValues[1] = 0;
-        mValues[2] = 0;
-        mValues[3] = 0;
-        mValues[4] = sy;
-        mValues[5] = 0;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-    }
-
-    /**
-     * Set the matrix to rotate by the specified number of degrees, with a pivot
-     * point at (px, py). The pivot point is the coordinate that should remain
-     * unchanged by the specified transformation.
-     */
-    @Override
-    public void setRotate(float degrees, float px, float py) {
-        // TODO: do it in one pass
-
-        // translate so that the pivot is in 0,0
-        mValues[0] = 1;
-        mValues[1] = 0;
-        mValues[2] = -px;
-        mValues[3] = 0;
-        mValues[4] = 1;
-        mValues[5] = -py;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-
-        // scale
-        double rad = Math.toRadians(degrees);
-        float cos = (float)Math.cos(rad);
-        float sin = (float)Math.sin(rad);
-        addTransform(new float[] { cos, -sin, 0, sin, cos, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-    }
-
-    /**
-     * Set the matrix to rotate about (0,0) by the specified number of degrees.
-     */
-    @Override
-    public void setRotate(float degrees) {
-        double rad = Math.toRadians(degrees);
-        float cos = (float)Math.cos(rad);
-        float sin = (float)Math.sin(rad);
-
-        mValues[0] = cos;
-        mValues[1] = -sin;
-        mValues[2] = 0;
-        mValues[3] = sin;
-        mValues[4] = cos;
-        mValues[5] = 0;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-    }
-
-    /**
-     * Set the matrix to rotate by the specified sine and cosine values, with a
-     * pivot point at (px, py). The pivot point is the coordinate that should
-     * remain unchanged by the specified transformation.
-     */
-    @Override
-    public void setSinCos(float sinValue, float cosValue, float px, float py) {
-        // TODO: do it in one pass
-
-        // translate so that the pivot is in 0,0
-        mValues[0] = 1;
-        mValues[1] = 0;
-        mValues[2] = -px;
-        mValues[3] = 0;
-        mValues[4] = 1;
-        mValues[5] = -py;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-
-        // scale
-        addTransform(new float[] { cosValue, -sinValue, 0, sinValue, cosValue, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-    }
-
-    /** Set the matrix to rotate by the specified sine and cosine values. */
-    @Override
-    public void setSinCos(float sinValue, float cosValue) {
-        mValues[0] = cosValue;
-        mValues[1] = -sinValue;
-        mValues[2] = 0;
-        mValues[3] = sinValue;
-        mValues[4] = cosValue;
-        mValues[5] = 0;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-    }
-
-    /**
-     * Set the matrix to skew by sx and sy, with a pivot point at (px, py).
-     * The pivot point is the coordinate that should remain unchanged by the
-     * specified transformation.
-     */
-    @Override
-    public void setSkew(float kx, float ky, float px, float py) {
-        // TODO: do it in one pass
-
-        // translate so that the pivot is in 0,0
-        mValues[0] = 1;
-        mValues[1] = 0;
-        mValues[2] = -px;
-        mValues[3] = 0;
-        mValues[4] = 1;
-        mValues[5] = -py;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-
-        // scale
-        addTransform(new float[] { 1, kx, 0, ky, 1, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-    }
-
-    /** Set the matrix to skew by sx and sy. */
-    @Override
-    public void setSkew(float kx, float ky) {
-        mValues[0] = 1;
-        mValues[1] = kx;
-        mValues[2] = -0;
-        mValues[3] = ky;
-        mValues[4] = 1;
-        mValues[5] = 0;
-        mValues[6] = 0;
-        mValues[7] = 0;
-        mValues[8] = 1;
-    }
-
-    /**
-     * Set the matrix to the concatenation of the two specified matrices,
-     * returning true if the the result can be represented. Either of the two
-     * matrices may also be the target matrix. this = a * b
-     */
-    public boolean setConcat(Matrix a, Matrix b) {
-        if (a == this) {
-            preConcat(b);
-        } else if (b == this) {
-            postConcat(b);
-        } else {
-            Matrix tmp = new Matrix(b);
-            tmp.addTransform(a.mValues);
-            set(tmp);
-        }
-
-        return true;
-    }
-
-    @Override
-    public boolean setConcat(_Original_Matrix a, _Original_Matrix b) {
-        throw new UnsupportedOperationException("CALL TO PARENT FORBIDDEN");
-    }
-
-    /**
-     * Preconcats the matrix with the specified translation.
-     * M' = M * T(dx, dy)
-     */
-    @Override
-    public boolean preTranslate(float dx, float dy) {
-        // create a matrix that will be multiply by this
-        Matrix m = new Matrix(new float[] { 1, 0, dx, 0, 1, dy, 0, 0, 1 });
-        m.addTransform(this.mValues);
-
-        System.arraycopy(m.mValues, 0, mValues, 0, 9);
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified scale.
-     * M' = M * S(sx, sy, px, py)
-     */
-    @Override
-    public boolean preScale(float sx, float sy, float px, float py) {
-        Matrix m = new Matrix();
-        m.setScale(sx, sy, px, py);
-        m.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified scale.
-     * M' = M * S(sx, sy)
-     */
-    @Override
-    public boolean preScale(float sx, float sy) {
-        Matrix m = new Matrix();
-        m.setScale(sx, sy);
-        m.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified rotation.
-     * M' = M * R(degrees, px, py)
-     */
-    @Override
-    public boolean preRotate(float degrees, float px, float py) {
-        Matrix m = new Matrix();
-        m.setRotate(degrees, px, py);
-        m.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified rotation.
-     * M' = M * R(degrees)
-     */
-    @Override
-    public boolean preRotate(float degrees) {
-        Matrix m = new Matrix();
-        m.setRotate(degrees);
-        m.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified skew.
-     * M' = M * K(kx, ky, px, py)
-     */
-    @Override
-    public boolean preSkew(float kx, float ky, float px, float py) {
-        Matrix m = new Matrix();
-        m.setSkew(kx, ky, px, py);
-        m.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified skew.
-     * M' = M * K(kx, ky)
-     */
-    @Override
-    public boolean preSkew(float kx, float ky) {
-        Matrix m = new Matrix();
-        m.setSkew(kx, ky);
-        m.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    /**
-     * Preconcats the matrix with the specified matrix.
-     * M' = M * other
-     */
-    public boolean preConcat(Matrix other) {
-        Matrix m = new Matrix(other);
-        other.addTransform(mValues);
-        set(m);
-
-        return true;
-    }
-
-    @Override
-    public boolean preConcat(_Original_Matrix other) {
-        throw new UnsupportedOperationException("CALL TO PARENT FORBIDDEN");
-    }
-
-    /**
-     * Postconcats the matrix with the specified translation.
-     * M' = T(dx, dy) * M
-     */
-    @Override
-    public boolean postTranslate(float dx, float dy) {
-        addTransform(new float[] { 1, 0, dx, 0, 1, dy, 0, 0, 1 });
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified scale.
-     * M' = S(sx, sy, px, py) * M
-     */
-    @Override
-    public boolean postScale(float sx, float sy, float px, float py) {
-        // TODO: do it in one pass
-        // translate so that the pivot is in 0,0
-        addTransform(new float[] { 1, 0, -px, 0, 1, py, 0, 0, 1 });
-        // scale
-        addTransform(new float[] { sx, 0, 0, 0, sy, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified scale.
-     * M' = S(sx, sy) * M
-     */
-    @Override
-    public boolean postScale(float sx, float sy) {
-        addTransform(new float[] { sx, 0, 0, 0, sy, 0, 0, 0, 1 });
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified rotation.
-     * M' = R(degrees, px, py) * M
-     */
-    @Override
-    public boolean postRotate(float degrees, float px, float py) {
-        // TODO: do it in one pass
-        // translate so that the pivot is in 0,0
-        addTransform(new float[] { 1, 0, -px, 0, 1, py, 0, 0, 1 });
-        // scale
-        double rad = Math.toRadians(degrees);
-        float cos = (float)Math.cos(rad);
-        float sin = (float)Math.sin(rad);
-        addTransform(new float[] { cos, -sin, 0, sin, cos, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified rotation.
-     * M' = R(degrees) * M
-     */
-    @Override
-    public boolean postRotate(float degrees) {
-        double rad = Math.toRadians(degrees);
-        float cos = (float)Math.cos(rad);
-        float sin = (float)Math.sin(rad);
-        addTransform(new float[] { cos, -sin, 0, sin, cos, 0, 0, 0, 1 });
-
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified skew.
-     * M' = K(kx, ky, px, py) * M
-     */
-    @Override
-    public boolean postSkew(float kx, float ky, float px, float py) {
-        // TODO: do it in one pass
-        // translate so that the pivot is in 0,0
-        addTransform(new float[] { 1, 0, -px, 0, 1, py, 0, 0, 1 });
-        // scale
-        addTransform(new float[] { 1, kx, 0, ky, 1, 0, 0, 0, 1 });
-        // translate back the pivot
-        addTransform(new float[] { 1, 0, px, 0, 1, py, 0, 0, 1 });
-
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified skew.
-     * M' = K(kx, ky) * M
-     */
-    @Override
-    public boolean postSkew(float kx, float ky) {
-        addTransform(new float[] { 1, kx, 0, ky, 1, 0, 0, 0, 1 });
-
-        return true;
-    }
-
-    /**
-     * Postconcats the matrix with the specified matrix.
-     * M' = other * M
-     */
-    public boolean postConcat(Matrix other) {
-        addTransform(other.mValues);
-
-        return true;
-    }
-
-    @Override
-    public boolean postConcat(_Original_Matrix other) {
-        throw new UnsupportedOperationException("CALL TO PARENT FORBIDDEN");
-    }
-
-    /** Controlls how the src rect should align into the dst rect for
-        setRectToRect().
-    */
-    public enum ScaleToFit {
-        /**
-         * Scale in X and Y independently, so that src matches dst exactly.
-         * This may change the aspect ratio of the src.
-         */
-        FILL    (0),
-        /**
-         * Compute a scale that will maintain the original src aspect ratio,
-         * but will also ensure that src fits entirely inside dst. At least one
-         * axis (X or Y) will fit exactly. START aligns the result to the
-         * left and top edges of dst.
-         */
-        START   (1),
-        /**
-         * Compute a scale that will maintain the original src aspect ratio,
-         * but will also ensure that src fits entirely inside dst. At least one
-         * axis (X or Y) will fit exactly. The result is centered inside dst.
-         */
-        CENTER  (2),
-        /**
-         * Compute a scale that will maintain the original src aspect ratio,
-         * but will also ensure that src fits entirely inside dst. At least one
-         * axis (X or Y) will fit exactly. END aligns the result to the
-         * right and bottom edges of dst.
-         */
-        END     (3);
-
-        // the native values must match those in SkMatrix.h
-        ScaleToFit(int nativeInt) {
-            this.nativeInt = nativeInt;
-        }
-        final int nativeInt;
-    }
-
-    /**
-     * Set the matrix to the scale and translate values that map the source
-     * rectangle to the destination rectangle, returning true if the result
-     * can be represented.
-     *
-     * @param src the source rectangle to map from.
-     * @param dst the destination rectangle to map to.
-     * @param stf the ScaleToFit option
-     * @return true if the matrix can be represented by the rectangle mapping.
-     */
-    public boolean setRectToRect(RectF src, RectF dst, ScaleToFit stf) {
-        if (dst == null || src == null) {
-            throw new NullPointerException();
-        }
-
-        if (src.isEmpty()) {
-            reset();
-            return false;
-        }
-
-        if (dst.isEmpty()) {
-            mValues[0] = mValues[1] = mValues[2] = mValues[3] = mValues[4] = mValues[5]
-               = mValues[6] = mValues[7] = 0;
-            mValues[8] = 1;
-        } else {
-            float    tx, sx = dst.width() / src.width();
-            float    ty, sy = dst.height() / src.height();
-            boolean  xLarger = false;
-
-            if (stf != ScaleToFit.FILL) {
-                if (sx > sy) {
-                    xLarger = true;
-                    sx = sy;
-                } else {
-                    sy = sx;
-                }
-            }
-
-            tx = dst.left - src.left * sx;
-            ty = dst.top - src.top * sy;
-            if (stf == ScaleToFit.CENTER || stf == ScaleToFit.END) {
-                float diff;
-
-                if (xLarger) {
-                    diff = dst.width() - src.width() * sy;
-                } else {
-                    diff = dst.height() - src.height() * sy;
-                }
-
-                if (stf == ScaleToFit.CENTER) {
-                    diff = diff / 2;
-                }
-
-                if (xLarger) {
-                    tx += diff;
-                } else {
-                    ty += diff;
-                }
-            }
-
-            mValues[0] = sx;
-            mValues[4] = sy;
-            mValues[2] = tx;
-            mValues[5] = ty;
-            mValues[1]  = mValues[3] = mValues[6] = mValues[7] = 0;
-
-        }
-        // shared cleanup
-        mValues[8] = 1;
-        return true;
-    }
-
-    @Override
-    public boolean setRectToRect(RectF src, RectF dst, _Original_Matrix.ScaleToFit stf) {
-        throw new UnsupportedOperationException("CALL TO PARENT FORBIDDEN");
-    }
-
-    /**
-     * Set the matrix such that the specified src points would map to the
-     * specified dst points. The "points" are represented as an array of floats,
-     * order [x0, y0, x1, y1, ...], where each "point" is 2 float values.
-     *
-     * @param src   The array of src [x,y] pairs (points)
-     * @param srcIndex Index of the first pair of src values
-     * @param dst   The array of dst [x,y] pairs (points)
-     * @param dstIndex Index of the first pair of dst values
-     * @param pointCount The number of pairs/points to be used. Must be [0..4]
-     * @return true if the matrix was set to the specified transformation
-     */
-    @Override
-    public boolean setPolyToPoly(float[] src, int srcIndex,
-                                 float[] dst, int dstIndex,
-                                 int pointCount) {
-        if (pointCount > 4) {
-            throw new IllegalArgumentException();
-        }
-        checkPointArrays(src, srcIndex, dst, dstIndex, pointCount);
-        throw new UnsupportedOperationException("STUB NEEDED");
-    }
-
-    /**
-     * If this matrix can be inverted, return true and if inverse is not null,
-     * set inverse to be the inverse of this matrix. If this matrix cannot be
-     * inverted, ignore inverse and return false.
-     */
-    public boolean invert(Matrix inverse) {
-        if (inverse == null) {
-            return false;
-        }
-
-        try {
-            AffineTransform affineTransform = getTransform();
-            AffineTransform inverseTransform = affineTransform.createInverse();
-            inverse.mValues[0] = (float)inverseTransform.getScaleX();
-            inverse.mValues[1] = (float)inverseTransform.getShearX();
-            inverse.mValues[2] = (float)inverseTransform.getTranslateX();
-            inverse.mValues[3] = (float)inverseTransform.getScaleX();
-            inverse.mValues[4] = (float)inverseTransform.getShearY();
-            inverse.mValues[5] = (float)inverseTransform.getTranslateY();
-
-            return true;
-        } catch (NoninvertibleTransformException e) {
-            return false;
-        }
-    }
-
-    @Override
-    public boolean invert(_Original_Matrix inverse) {
-        throw new UnsupportedOperationException("CALL TO PARENT FORBIDDEN");
-    }
-
-    /**
-    * Apply this matrix to the array of 2D points specified by src, and write
-     * the transformed points into the array of points specified by dst. The
-     * two arrays represent their "points" as pairs of floats [x, y].
-     *
-     * @param dst   The array of dst points (x,y pairs)
-     * @param dstIndex The index of the first [x,y] pair of dst floats
-     * @param src   The array of src points (x,y pairs)
-     * @param srcIndex The index of the first [x,y] pair of src floats
-     * @param pointCount The number of points (x,y pairs) to transform
-     */
-    @Override
-    public void mapPoints(float[] dst, int dstIndex, float[] src, int srcIndex,
-                          int pointCount) {
-        checkPointArrays(src, srcIndex, dst, dstIndex, pointCount);
-
-        for (int i = 0 ; i < pointCount ; i++) {
-            // just in case we are doing in place, we better put this in temp vars
-            float x = mValues[0] * src[i + srcIndex] +
-                      mValues[1] * src[i + srcIndex + 1] +
-                      mValues[2];
-            float y = mValues[3] * src[i + srcIndex] +
-                      mValues[4] * src[i + srcIndex + 1] +
-                      mValues[5];
-
-            dst[i + dstIndex]     = x;
-            dst[i + dstIndex + 1] = y;
-        }
-    }
-
-    /**
-    * Apply this matrix to the array of 2D vectors specified by src, and write
-     * the transformed vectors into the array of vectors specified by dst. The
-     * two arrays represent their "vectors" as pairs of floats [x, y].
-     *
-     * @param dst   The array of dst vectors (x,y pairs)
-     * @param dstIndex The index of the first [x,y] pair of dst floats
-     * @param src   The array of src vectors (x,y pairs)
-     * @param srcIndex The index of the first [x,y] pair of src floats
-     * @param vectorCount The number of vectors (x,y pairs) to transform
-     */
-    @Override
-    public void mapVectors(float[] dst, int dstIndex, float[] src, int srcIndex,
-                          int vectorCount) {
-        checkPointArrays(src, srcIndex, dst, dstIndex, vectorCount);
-        throw new UnsupportedOperationException("STUB NEEDED");
-    }
-
-    /**
-     * Apply this matrix to the array of 2D points specified by src, and write
-     * the transformed points into the array of points specified by dst. The
-     * two arrays represent their "points" as pairs of floats [x, y].
-     *
-     * @param dst   The array of dst points (x,y pairs)
-     * @param src   The array of src points (x,y pairs)
-     */
-    @Override
-    public void mapPoints(float[] dst, float[] src) {
-        if (dst.length != src.length) {
-            throw new ArrayIndexOutOfBoundsException();
-        }
-        mapPoints(dst, 0, src, 0, dst.length >> 1);
-    }
-
-    /**
-     * Apply this matrix to the array of 2D vectors specified by src, and write
-     * the transformed vectors into the array of vectors specified by dst. The
-     * two arrays represent their "vectors" as pairs of floats [x, y].
-     *
-     * @param dst   The array of dst vectors (x,y pairs)
-     * @param src   The array of src vectors (x,y pairs)
-     */
-    @Override
-    public void mapVectors(float[] dst, float[] src) {
-        if (dst.length != src.length) {
-            throw new ArrayIndexOutOfBoundsException();
-        }
-        mapVectors(dst, 0, src, 0, dst.length >> 1);
-    }
-
-    /**
-     * Apply this matrix to the array of 2D points, and write the transformed
-     * points back into the array
-     *
-     * @param pts The array [x0, y0, x1, y1, ...] of points to transform.
-     */
-    @Override
-    public void mapPoints(float[] pts) {
-        mapPoints(pts, 0, pts, 0, pts.length >> 1);
-    }
-
-    /**
-     * Apply this matrix to the array of 2D vectors, and write the transformed
-     * vectors back into the array.
-     * @param vecs The array [x0, y0, x1, y1, ...] of vectors to transform.
-     */
-    @Override
-    public void mapVectors(float[] vecs) {
-        mapVectors(vecs, 0, vecs, 0, vecs.length >> 1);
-    }
-
-    /**
-     * Apply this matrix to the src rectangle, and write the transformed
-     * rectangle into dst. This is accomplished by transforming the 4 corners of
-     * src, and then setting dst to the bounds of those points.
-     *
-     * @param dst Where the transformed rectangle is written.
-     * @param src The original rectangle to be transformed.
-     * @return the result of calling rectStaysRect()
-     */
-    @Override
-    public boolean mapRect(RectF dst, RectF src) {
-        if (dst == null || src == null) {
-            throw new NullPointerException();
-        }
-
-        // array with 4 corners
-        float[] corners = new float[] {
-                src.left, src.top,
-                src.right, src.top,
-                src.right, src.bottom,
-                src.left, src.bottom,
-        };
-
-        // apply the transform to them.
-        mapPoints(corners);
-
-        // now put the result in the rect. We take the min/max of Xs and min/max of Ys
-        dst.left = Math.min(Math.min(corners[0], corners[2]), Math.min(corners[4], corners[6]));
-        dst.right = Math.max(Math.max(corners[0], corners[2]), Math.max(corners[4], corners[6]));
-
-        dst.top = Math.min(Math.min(corners[1], corners[3]), Math.min(corners[5], corners[7]));
-        dst.bottom = Math.max(Math.max(corners[1], corners[3]), Math.max(corners[5], corners[7]));
-
-        return rectStaysRect();
-    }
-
-    /**
-     * Apply this matrix to the rectangle, and write the transformed rectangle
-     * back into it. This is accomplished by transforming the 4 corners of rect,
-     * and then setting it to the bounds of those points
-     *
-     * @param rect The rectangle to transform.
-     * @return the result of calling rectStaysRect()
-     */
-    @Override
-    public boolean mapRect(RectF rect) {
-        return mapRect(rect, rect);
-    }
-
-    /**
-     * Return the mean radius of a circle after it has been mapped by
-     * this matrix. NOTE: in perspective this value assumes the circle
-     * has its center at the origin.
-     */
-    @Override
-    public float mapRadius(float radius) {
-        throw new UnsupportedOperationException("STUB NEEDED");
-    }
-
-    /** Copy 9 values from the matrix into the array.
-    */
-    @Override
-    public void getValues(float[] values) {
-        if (values.length < 9) {
-            throw new ArrayIndexOutOfBoundsException();
-        }
-        System.arraycopy(mValues, 0, values, 0, mValues.length);
-    }
-
-    /** Copy 9 values from the array into the matrix.
-        Depending on the implementation of Matrix, these may be
-        transformed into 16.16 integers in the Matrix, such that
-        a subsequent call to getValues() will not yield exactly
-        the same values.
-    */
-    @Override
-    public void setValues(float[] values) {
-        if (values.length < 9) {
-            throw new ArrayIndexOutOfBoundsException();
-        }
-        System.arraycopy(values, 0, mValues, 0, mValues.length);
-    }
-
-    @SuppressWarnings("unused")
-    private final static int kIdentity_Mask      = 0;
-    private final static int kTranslate_Mask     = 0x01;  //!< set if the matrix has translation
-    private final static int kScale_Mask         = 0x02;  //!< set if the matrix has X or Y scale
-    private final static int kAffine_Mask        = 0x04;  //!< set if the matrix skews or rotates
-    private final static int kPerspective_Mask   = 0x08;  //!< set if the matrix is in perspective
-    private final static int kRectStaysRect_Mask = 0x10;
-    @SuppressWarnings("unused")
-    private final static int kUnknown_Mask       = 0x80;
-
-    @SuppressWarnings("unused")
-    private final static int kAllMasks           = kTranslate_Mask |
-                                                     kScale_Mask |
-                                                     kAffine_Mask |
-                                                     kPerspective_Mask |
-                                                     kRectStaysRect_Mask;
-
-    // these guys align with the masks, so we can compute a mask from a variable 0/1
-    @SuppressWarnings("unused")
-    private final static int kTranslate_Shift = 0;
-    @SuppressWarnings("unused")
-    private final static int kScale_Shift = 1;
-    @SuppressWarnings("unused")
-    private final static int kAffine_Shift = 2;
-    @SuppressWarnings("unused")
-    private final static int kPerspective_Shift = 3;
-    private final static int kRectStaysRect_Shift = 4;
-
-    private int computeTypeMask() {
-        int mask = 0;
-
-        if (mValues[6] != 0. || mValues[7] != 0. || mValues[8] != 1.) {
-            mask |= kPerspective_Mask;
-        }
-
-        if (mValues[2] != 0. || mValues[5] != 0.) {
-            mask |= kTranslate_Mask;
-        }
-
-        float m00 = mValues[0];
-        float m01 = mValues[1];
-        float m10 = mValues[3];
-        float m11 = mValues[4];
-
-        if (m01 != 0. || m10 != 0.) {
-            mask |= kAffine_Mask;
-        }
-
-        if (m00 != 1. || m11 != 1.) {
-            mask |= kScale_Mask;
-        }
-
-        if ((mask & kPerspective_Mask) == 0) {
-            // map non-zero to 1
-            int im00 = m00 != 0 ? 1 : 0;
-            int im01 = m01 != 0 ? 1 : 0;
-            int im10 = m10 != 0 ? 1 : 0;
-            int im11 = m11 != 0 ? 1 : 0;
-
-            // record if the (p)rimary and (s)econdary diagonals are all 0 or
-            // all non-zero (answer is 0 or 1)
-            int dp0 = (im00 | im11) ^ 1;  // true if both are 0
-            int dp1 = im00 & im11;        // true if both are 1
-            int ds0 = (im01 | im10) ^ 1;  // true if both are 0
-            int ds1 = im01 & im10;        // true if both are 1
-
-            // return 1 if primary is 1 and secondary is 0 or
-            // primary is 0 and secondary is 1
-            mask |= ((dp0 & ds1) | (dp1 & ds0)) << kRectStaysRect_Shift;
-        }
-
-        return mask;
-    }
-}
diff --git a/tools/layoutlib/bridge/src/android/graphics/Matrix_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/Matrix_Delegate.java
new file mode 100644
index 0000000..ed2eff2
--- /dev/null
+++ b/tools/layoutlib/bridge/src/android/graphics/Matrix_Delegate.java
@@ -0,0 +1,1011 @@
+/*
+ * 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.
+ */
+
+package android.graphics;
+
+
+import com.android.layoutlib.bridge.DelegateManager;
+
+import android.graphics.Matrix.ScaleToFit;
+
+import java.awt.geom.AffineTransform;
+import java.awt.geom.NoninvertibleTransformException;
+
+/**
+ * Delegate implementing the native methods of android.graphics.Matrix
+ *
+ * Through the layoutlib_create tool, the original native methods of Matrix have been replaced
+ * by calls to methods of the same name in this delegate class.
+ *
+ * This class behaves like the original native implementation, but in Java, keeping previously
+ * native data into its own objects and mapping them to int that are sent back and forth between
+ * it and the original Matrix class.
+ *
+ * @see DelegateManager
+ *
+ */
+public final class Matrix_Delegate {
+
+    private final static int MATRIX_SIZE = 9;
+
+    // ---- delegate manager ----
+    private static final DelegateManager<Matrix_Delegate> sManager =
+            new DelegateManager<Matrix_Delegate>();
+
+    // ---- delegate data ----
+    private float mValues[] = new float[MATRIX_SIZE];
+
+    // ---- Public Helper methods ----
+
+    /**
+     * Returns an {@link AffineTransform} matching the given Matrix.
+     */
+    public static AffineTransform getAffineTransform(Matrix m) {
+        Matrix_Delegate delegate = sManager.getDelegate(m.native_instance);
+        if (delegate == null) {
+            assert false;
+            return null;
+        }
+
+        return getAffineTransform(delegate);
+    }
+
+    public static boolean hasPerspective(Matrix m) {
+        Matrix_Delegate delegate = sManager.getDelegate(m.native_instance);
+        if (delegate == null) {
+            assert false;
+            return false;
+        }
+
+        return (delegate.mValues[6] != 0 || delegate.mValues[7] != 0 || delegate.mValues[8] != 1);
+    }
+
+
+    // ---- native methods ----
+
+    public static int native_create(int native_src_or_zero) {
+        // create the delegate
+        Matrix_Delegate newDelegate = new Matrix_Delegate();
+
+        // copy from values if needed.
+        if (native_src_or_zero > 0) {
+            Matrix_Delegate oldDelegate = sManager.getDelegate(native_src_or_zero);
+            if (oldDelegate != null) {
+                System.arraycopy(
+                        oldDelegate.mValues, 0,
+                        newDelegate.mValues, 0,
+                        MATRIX_SIZE);
+            }
+        }
+
+        return sManager.addDelegate(newDelegate);
+    }
+
+    public static boolean native_isIdentity(int native_object) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        for (int i = 0, k = 0; i < 3; i++) {
+            for (int j = 0; j < 3; j++, k++) {
+                if (d.mValues[k] != ((i==j) ? 1 : 0)) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    public static boolean native_rectStaysRect(int native_object) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return true;
+        }
+
+        return (d.computeTypeMask() & kRectStaysRect_Mask) != 0;
+    }
+
+    public static void native_reset(int native_object) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        reset(d.mValues);
+    }
+
+    public static void native_set(int native_object, int other) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        Matrix_Delegate src = sManager.getDelegate(other);
+        if (src == null) {
+            assert false;
+            return;
+        }
+
+        System.arraycopy(src.mValues, 0, d.mValues, 0, MATRIX_SIZE);
+    }
+
+    public static void native_setTranslate(int native_object, float dx, float dy) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        setTranslate(d.mValues, dx, dy);
+    }
+
+    public static void native_setScale(int native_object, float sx, float sy, float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        d.mValues = getScale(sx, sy, px, py);
+    }
+
+    public static void native_setScale(int native_object, float sx, float sy) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        d.mValues[0] = sx;
+        d.mValues[1] = 0;
+        d.mValues[2] = 0;
+        d.mValues[3] = 0;
+        d.mValues[4] = sy;
+        d.mValues[5] = 0;
+        d.mValues[6] = 0;
+        d.mValues[7] = 0;
+        d.mValues[8] = 1;
+    }
+
+    public static void native_setRotate(int native_object, float degrees, float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        d.mValues = getRotate(degrees, px, py);
+    }
+
+    public static void native_setRotate(int native_object, float degrees) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        setRotate(d.mValues, degrees);
+    }
+
+    public static void native_setSinCos(int native_object, float sinValue, float cosValue,
+            float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        // TODO: do it in one pass
+
+        // translate so that the pivot is in 0,0
+        setTranslate(d.mValues, -px, -py);
+
+        // scale
+        d.postTransform(getRotate(sinValue, cosValue));
+        // translate back the pivot
+        d.postTransform(getTranslate(px, py));
+    }
+
+    public static void native_setSinCos(int native_object, float sinValue, float cosValue) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        setRotate(d.mValues, sinValue, cosValue);
+    }
+
+    public static void native_setSkew(int native_object, float kx, float ky, float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        d.mValues = getSkew(kx, ky, px, py);
+    }
+
+    public static void native_setSkew(int native_object, float kx, float ky) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        d.mValues[0] = 1;
+        d.mValues[1] = kx;
+        d.mValues[2] = -0;
+        d.mValues[3] = ky;
+        d.mValues[4] = 1;
+        d.mValues[5] = 0;
+        d.mValues[6] = 0;
+        d.mValues[7] = 0;
+        d.mValues[8] = 1;
+    }
+
+    public static boolean native_setConcat(int native_object, int a, int b) {
+        if (a == native_object) {
+            return native_preConcat(native_object, b);
+        } else if (b == native_object) {
+            return native_postConcat(native_object, a);
+        }
+
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        Matrix_Delegate a_mtx = sManager.getDelegate(a);
+        if (a_mtx == null) {
+            assert false;
+            return false;
+        }
+
+        Matrix_Delegate b_mtx = sManager.getDelegate(b);
+        if (b_mtx == null) {
+            assert false;
+            return false;
+        }
+
+        multiply(d.mValues, a_mtx.mValues, b_mtx.mValues);
+
+        return true;
+    }
+
+    public static boolean native_preTranslate(int native_object, float dx, float dy) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getTranslate(dx, dy));
+        return true;
+    }
+
+    public static boolean native_preScale(int native_object, float sx, float sy,
+            float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getScale(sx, sy, px, py));
+        return true;
+    }
+
+    public static boolean native_preScale(int native_object, float sx, float sy) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getScale(sx, sy));
+        return true;
+    }
+
+    public static boolean native_preRotate(int native_object, float degrees, float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getRotate(degrees, px, py));
+        return true;
+    }
+
+    public static boolean native_preRotate(int native_object, float degrees) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        double rad = Math.toRadians(degrees);
+        float sin = (float)Math.sin(rad);
+        float cos = (float)Math.cos(rad);
+
+        d.preTransform(getRotate(sin, cos));
+        return true;
+    }
+
+    public static boolean native_preSkew(int native_object, float kx, float ky,
+            float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getSkew(kx, ky, px, py));
+        return true;
+    }
+
+    public static boolean native_preSkew(int native_object, float kx, float ky) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getSkew(kx, ky));
+        return true;
+    }
+
+    public static boolean native_preConcat(int native_object, int other_matrix) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        Matrix_Delegate other = sManager.getDelegate(other_matrix);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(other.mValues);
+        return true;
+    }
+
+    public static boolean native_postTranslate(int native_object, float dx, float dy) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(getTranslate(dx, dy));
+        return true;
+    }
+
+    public static boolean native_postScale(int native_object, float sx, float sy,
+            float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(getScale(sx, sy, px, py));
+        return true;
+    }
+
+    public static boolean native_postScale(int native_object, float sx, float sy) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(getScale(sx, sy));
+        return true;
+    }
+
+    public static boolean native_postRotate(int native_object, float degrees, float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.preTransform(getRotate(degrees, px, py));
+        return true;
+    }
+
+    public static boolean native_postRotate(int native_object, float degrees) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(getRotate(degrees));
+        return true;
+    }
+
+    public static boolean native_postSkew(int native_object, float kx, float ky,
+            float px, float py) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(getSkew(kx, ky, px, py));
+        return true;
+    }
+
+    public static boolean native_postSkew(int native_object, float kx, float ky) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(getSkew(kx, ky));
+        return true;
+    }
+
+    public static boolean native_postConcat(int native_object, int other_matrix) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        Matrix_Delegate other = sManager.getDelegate(other_matrix);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        d.postTransform(other.mValues);
+        return true;
+    }
+
+    public static boolean native_setRectToRect(int native_object, RectF src, RectF dst, int stf) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        if (src.isEmpty()) {
+            reset(d.mValues);
+            return false;
+        }
+
+        if (dst.isEmpty()) {
+            d.mValues[0] = d.mValues[1] = d.mValues[2] = d.mValues[3] = d.mValues[4] = d.mValues[5]
+               = d.mValues[6] = d.mValues[7] = 0;
+            d.mValues[8] = 1;
+        } else {
+            float    tx, sx = dst.width() / src.width();
+            float    ty, sy = dst.height() / src.height();
+            boolean  xLarger = false;
+
+            if (stf != ScaleToFit.FILL.nativeInt) {
+                if (sx > sy) {
+                    xLarger = true;
+                    sx = sy;
+                } else {
+                    sy = sx;
+                }
+            }
+
+            tx = dst.left - src.left * sx;
+            ty = dst.top - src.top * sy;
+            if (stf == ScaleToFit.CENTER.nativeInt || stf == ScaleToFit.END.nativeInt) {
+                float diff;
+
+                if (xLarger) {
+                    diff = dst.width() - src.width() * sy;
+                } else {
+                    diff = dst.height() - src.height() * sy;
+                }
+
+                if (stf == ScaleToFit.CENTER.nativeInt) {
+                    diff = diff / 2;
+                }
+
+                if (xLarger) {
+                    tx += diff;
+                } else {
+                    ty += diff;
+                }
+            }
+
+            d.mValues[0] = sx;
+            d.mValues[4] = sy;
+            d.mValues[2] = tx;
+            d.mValues[5] = ty;
+            d.mValues[1]  = d.mValues[3] = d.mValues[6] = d.mValues[7] = 0;
+
+        }
+        // shared cleanup
+        d.mValues[8] = 1;
+        return true;
+    }
+
+    public static boolean native_setPolyToPoly(int native_object, float[] src, int srcIndex,
+            float[] dst, int dstIndex, int pointCount) {
+        // FIXME
+        throw new UnsupportedOperationException("NATIVE DELEGATE NEEDED");
+    }
+
+    public static boolean native_invert(int native_object, int inverse) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        Matrix_Delegate inv_mtx = sManager.getDelegate(inverse);
+        if (inv_mtx == null) {
+            assert false;
+            return false;
+        }
+
+
+        try {
+            AffineTransform affineTransform = getAffineTransform(d);
+            AffineTransform inverseTransform = affineTransform.createInverse();
+            inv_mtx.mValues[0] = (float)inverseTransform.getScaleX();
+            inv_mtx.mValues[1] = (float)inverseTransform.getShearX();
+            inv_mtx.mValues[2] = (float)inverseTransform.getTranslateX();
+            inv_mtx.mValues[3] = (float)inverseTransform.getScaleX();
+            inv_mtx.mValues[4] = (float)inverseTransform.getShearY();
+            inv_mtx.mValues[5] = (float)inverseTransform.getTranslateY();
+
+            return true;
+        } catch (NoninvertibleTransformException e) {
+            return false;
+        }
+    }
+
+    public static void native_mapPoints(int native_object, float[] dst, int dstIndex,
+            float[] src, int srcIndex, int ptCount, boolean isPts) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        if (isPts) {
+            d.mapPoints(dst, dstIndex, src, srcIndex, ptCount);
+        } else {
+            // src is vectors
+            // FIXME
+            throw new UnsupportedOperationException("NATIVE DELEGATE NEEDED");
+        }
+    }
+
+    public static boolean native_mapRect(int native_object, RectF dst, RectF src) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return false;
+        }
+
+        // array with 4 corners
+        float[] corners = new float[] {
+                src.left, src.top,
+                src.right, src.top,
+                src.right, src.bottom,
+                src.left, src.bottom,
+        };
+
+        // apply the transform to them.
+        d.mapPoints(corners);
+
+        // now put the result in the rect. We take the min/max of Xs and min/max of Ys
+        dst.left = Math.min(Math.min(corners[0], corners[2]), Math.min(corners[4], corners[6]));
+        dst.right = Math.max(Math.max(corners[0], corners[2]), Math.max(corners[4], corners[6]));
+
+        dst.top = Math.min(Math.min(corners[1], corners[3]), Math.min(corners[5], corners[7]));
+        dst.bottom = Math.max(Math.max(corners[1], corners[3]), Math.max(corners[5], corners[7]));
+
+
+        return (d.computeTypeMask() & kRectStaysRect_Mask) != 0;
+    }
+
+    public static float native_mapRadius(int native_object, float radius) {
+        // FIXME
+        throw new UnsupportedOperationException();
+    }
+
+    public static void native_getValues(int native_object, float[] values) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        System.arraycopy(d.mValues, 0, d.mValues, 0, MATRIX_SIZE);
+    }
+
+    public static void native_setValues(int native_object, float[] values) {
+        Matrix_Delegate d = sManager.getDelegate(native_object);
+        if (d == null) {
+            assert false;
+            return;
+        }
+
+        System.arraycopy(values, 0, d.mValues, 0, MATRIX_SIZE);
+    }
+
+    public static boolean native_equals(int native_a, int native_b) {
+        Matrix_Delegate a = sManager.getDelegate(native_a);
+        if (a == null) {
+            assert false;
+            return false;
+        }
+
+        Matrix_Delegate b = sManager.getDelegate(native_b);
+        if (b == null) {
+            assert false;
+            return false;
+        }
+
+        for (int i = 0 ; i < MATRIX_SIZE ; i++) {
+            if (a.mValues[i] != b.mValues[i]) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public static void finalizer(int native_instance) {
+        sManager.removeDelegate(native_instance);
+    }
+
+    // ---- Private helper methods ----
+
+    private static AffineTransform getAffineTransform(Matrix_Delegate d) {
+        // the AffineTransform constructor takes the value in a different order
+        // for a matrix [ 0 1 2 ]
+        //              [ 3 4 5 ]
+        // the order is 0, 3, 1, 4, 2, 5...
+        return new AffineTransform(
+                d.mValues[0], d.mValues[3], d.mValues[1],
+                d.mValues[4], d.mValues[2], d.mValues[5]);
+    }
+
+
+    /**
+     * Reset a matrix to the identity
+     */
+    private static void reset(float[] mtx) {
+        for (int i = 0, k = 0; i < 3; i++) {
+            for (int j = 0; j < 3; j++, k++) {
+                mtx[k] = ((i==j) ? 1 : 0);
+            }
+        }
+    }
+
+    @SuppressWarnings("unused")
+    private final static int kIdentity_Mask      = 0;
+    private final static int kTranslate_Mask     = 0x01;  //!< set if the matrix has translation
+    private final static int kScale_Mask         = 0x02;  //!< set if the matrix has X or Y scale
+    private final static int kAffine_Mask        = 0x04;  //!< set if the matrix skews or rotates
+    private final static int kPerspective_Mask   = 0x08;  //!< set if the matrix is in perspective
+    private final static int kRectStaysRect_Mask = 0x10;
+    @SuppressWarnings("unused")
+    private final static int kUnknown_Mask       = 0x80;
+
+    @SuppressWarnings("unused")
+    private final static int kAllMasks           = kTranslate_Mask |
+                                                   kScale_Mask |
+                                                   kAffine_Mask |
+                                                   kPerspective_Mask |
+                                                   kRectStaysRect_Mask;
+
+    // these guys align with the masks, so we can compute a mask from a variable 0/1
+    @SuppressWarnings("unused")
+    private final static int kTranslate_Shift = 0;
+    @SuppressWarnings("unused")
+    private final static int kScale_Shift = 1;
+    @SuppressWarnings("unused")
+    private final static int kAffine_Shift = 2;
+    @SuppressWarnings("unused")
+    private final static int kPerspective_Shift = 3;
+    private final static int kRectStaysRect_Shift = 4;
+
+    private int computeTypeMask() {
+        int mask = 0;
+
+        if (mValues[6] != 0. || mValues[7] != 0. || mValues[8] != 1.) {
+            mask |= kPerspective_Mask;
+        }
+
+        if (mValues[2] != 0. || mValues[5] != 0.) {
+            mask |= kTranslate_Mask;
+        }
+
+        float m00 = mValues[0];
+        float m01 = mValues[1];
+        float m10 = mValues[3];
+        float m11 = mValues[4];
+
+        if (m01 != 0. || m10 != 0.) {
+            mask |= kAffine_Mask;
+        }
+
+        if (m00 != 1. || m11 != 1.) {
+            mask |= kScale_Mask;
+        }
+
+        if ((mask & kPerspective_Mask) == 0) {
+            // map non-zero to 1
+            int im00 = m00 != 0 ? 1 : 0;
+            int im01 = m01 != 0 ? 1 : 0;
+            int im10 = m10 != 0 ? 1 : 0;
+            int im11 = m11 != 0 ? 1 : 0;
+
+            // record if the (p)rimary and (s)econdary diagonals are all 0 or
+            // all non-zero (answer is 0 or 1)
+            int dp0 = (im00 | im11) ^ 1;  // true if both are 0
+            int dp1 = im00 & im11;        // true if both are 1
+            int ds0 = (im01 | im10) ^ 1;  // true if both are 0
+            int ds1 = im01 & im10;        // true if both are 1
+
+            // return 1 if primary is 1 and secondary is 0 or
+            // primary is 0 and secondary is 1
+            mask |= ((dp0 & ds1) | (dp1 & ds0)) << kRectStaysRect_Shift;
+        }
+
+        return mask;
+    }
+
+    /**
+     * Adds the given transformation to the current Matrix
+     * <p/>This in effect does this = this*matrix
+     * @param matrix
+     */
+    private void postTransform(float[] matrix) {
+        float[] tmp = new float[9];
+        multiply(tmp, mValues, matrix);
+        mValues = tmp;
+    }
+
+    /**
+     * Adds the given transformation to the current Matrix
+     * <p/>This in effect does this = matrix*this
+     * @param matrix
+     */
+    private void preTransform(float[] matrix) {
+        float[] tmp = new float[9];
+        multiply(tmp, matrix, mValues);
+        mValues = tmp;
+    }
+
+    /**
+     * Apply this matrix to the array of 2D points specified by src, and write
+      * the transformed points into the array of points specified by dst. The
+      * two arrays represent their "points" as pairs of floats [x, y].
+      *
+      * @param dst   The array of dst points (x,y pairs)
+      * @param dstIndex The index of the first [x,y] pair of dst floats
+      * @param src   The array of src points (x,y pairs)
+      * @param srcIndex The index of the first [x,y] pair of src floats
+      * @param pointCount The number of points (x,y pairs) to transform
+      */
+
+     private void mapPoints(float[] dst, int dstIndex, float[] src, int srcIndex,
+                           int pointCount) {
+         //checkPointArrays(src, srcIndex, dst, dstIndex, pointCount);
+
+         float[] tmpDest = dst;
+         boolean inPlace = dst == src;
+         if (inPlace) {
+             tmpDest = new float[dstIndex + pointCount * 2];
+         }
+
+         for (int i = 0 ; i < pointCount ; i++) {
+             // just in case we are doing in place, we better put this in temp vars
+             float x = mValues[0] * src[i + srcIndex] +
+                       mValues[1] * src[i + srcIndex + 1] +
+                       mValues[2];
+             float y = mValues[3] * src[i + srcIndex] +
+                       mValues[4] * src[i + srcIndex + 1] +
+                       mValues[5];
+
+             tmpDest[i + dstIndex]     = x;
+             tmpDest[i + dstIndex + 1] = y;
+         }
+
+         if (inPlace) {
+             System.arraycopy(tmpDest, dstIndex, dst, dstIndex, pointCount * 2);
+         }
+     }
+
+     /**
+      * Apply this matrix to the array of 2D points, and write the transformed
+      * points back into the array
+      *
+      * @param pts The array [x0, y0, x1, y1, ...] of points to transform.
+      */
+
+     private void mapPoints(float[] pts) {
+         mapPoints(pts, 0, pts, 0, pts.length >> 1);
+     }
+
+    /**
+     * multiply two matrices and store them in a 3rd.
+     * <p/>This in effect does dest = a*b
+     * dest cannot be the same as a or b.
+     */
+    private static void multiply(float dest[], float[] a, float[] b) {
+        // first row
+        dest[0] = b[0] * a[0] + b[1] * a[3] + b[2] * a[6];
+        dest[1] = b[0] * a[1] + b[1] * a[4] + b[2] * a[7];
+        dest[2] = b[0] * a[2] + b[1] * a[5] + b[2] * a[8];
+
+        // 2nd row
+        dest[3] = b[3] * a[0] + b[4] * a[3] + b[5] * a[6];
+        dest[4] = b[3] * a[1] + b[4] * a[4] + b[5] * a[7];
+        dest[5] = b[3] * a[2] + b[4] * a[5] + b[5] * a[8];
+
+        // 3rd row
+        dest[6] = b[6] * a[0] + b[7] * a[3] + b[8] * a[6];
+        dest[7] = b[6] * a[1] + b[7] * a[4] + b[8] * a[7];
+        dest[8] = b[6] * a[2] + b[7] * a[5] + b[8] * a[8];
+    }
+
+    /**
+     * Returns a matrix that represents a given translate
+     * @param dx
+     * @param dy
+     * @return
+     */
+    private static float[] getTranslate(float dx, float dy) {
+        return setTranslate(new float[9], dx, dy);
+    }
+
+    private static float[] setTranslate(float[] dest, float dx, float dy) {
+        dest[0] = 1;
+        dest[1] = 0;
+        dest[2] = dx;
+        dest[3] = 0;
+        dest[4] = 1;
+        dest[5] = dy;
+        dest[6] = 0;
+        dest[7] = 0;
+        dest[8] = 1;
+        return dest;
+    }
+
+    private static float[] getScale(float sx, float sy) {
+        return new float[] { sx, 0, 0, 0, sy, 0, 0, 0, 1 };
+    }
+
+    /**
+     * Returns a matrix that represents the given scale info.
+     * @param sx
+     * @param sy
+     * @param px
+     * @param py
+     */
+    private static float[] getScale(float sx, float sy, float px, float py) {
+        float[] tmp = new float[9];
+        float[] tmp2 = new float[9];
+
+        // TODO: do it in one pass
+
+        // translate tmp so that the pivot is in 0,0
+        setTranslate(tmp, -px, -py);
+
+        // scale into tmp2
+        multiply(tmp2, tmp, getScale(sx, sy));
+
+        // translate back the pivot back into tmp
+        multiply(tmp, tmp2, getTranslate(px, py));
+
+        return tmp;
+    }
+
+
+    private static float[] getRotate(float degrees) {
+        double rad = Math.toRadians(degrees);
+        float sin = (float)Math.sin(rad);
+        float cos = (float)Math.cos(rad);
+
+        return getRotate(sin, cos);
+    }
+
+    private static float[] getRotate(float sin, float cos) {
+        return setRotate(new float[9], sin, cos);
+    }
+
+    private static float[] setRotate(float[] dest, float degrees) {
+        double rad = Math.toRadians(degrees);
+        float sin = (float)Math.sin(rad);
+        float cos = (float)Math.cos(rad);
+
+        return setRotate(dest, sin, cos);
+    }
+
+    private static float[] setRotate(float[] dest, float sin, float cos) {
+        dest[0] = cos;
+        dest[1] = -sin;
+        dest[2] = 0;
+        dest[3] = sin;
+        dest[4] = cos;
+        dest[5] = 0;
+        dest[6] = 0;
+        dest[7] = 0;
+        dest[8] = 1;
+        return dest;
+    }
+
+    private static float[] getRotate(float degrees, float px, float py) {
+        float[] tmp = new float[9];
+        float[] tmp2 = new float[9];
+
+        // TODO: do it in one pass
+
+        // translate so that the pivot is in 0,0
+        setTranslate(tmp, -px, -py);
+
+        // rotate into tmp2
+        double rad = Math.toRadians(degrees);
+        float cos = (float)Math.cos(rad);
+        float sin = (float)Math.sin(rad);
+        multiply(tmp2, tmp, getRotate(sin, cos));
+
+        // translate back the pivot back into tmp
+        multiply(tmp, tmp2, getTranslate(px, py));
+
+        return tmp;
+    }
+
+    private static float[] getSkew(float kx, float ky) {
+        return new float[] { 1, kx, 0, ky, 1, 0, 0, 0, 1 };
+    }
+
+    private static float[] getSkew(float kx, float ky, float px, float py) {
+        float[] tmp = new float[9];
+        float[] tmp2 = new float[9];
+
+        // TODO: do it in one pass
+
+        // translate so that the pivot is in 0,0
+        setTranslate(tmp, -px, -py);
+
+        // skew into tmp2
+        multiply(tmp2, tmp, new float[] { 1, kx, 0, ky, 1, 0, 0, 0, 1 });
+        // translate back the pivot back into tmp
+        multiply(tmp, tmp2, getTranslate(px, py));
+
+        return tmp;
+    }
+
+
+}
diff --git a/tools/layoutlib/bridge/src/android/graphics/Path.java b/tools/layoutlib/bridge/src/android/graphics/Path.java
index 12d2cde..c0bc005 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Path.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Path.java
@@ -31,13 +31,13 @@
  * text on a path.
  */
 public class Path {
-    
+
     private FillType mFillType = FillType.WINDING;
     private GeneralPath mPath = new GeneralPath();
-    
+
     private float mLastX = 0;
     private float mLastY = 0;
-    
+
     //---------- Custom methods ----------
 
     public Shape getAwtShape() {
@@ -60,7 +60,7 @@
     public Path(Path src) {
         mPath.append(src.mPath, false /* connect */);
     }
-    
+
     /**
      * Clear any lines and curves from the path, making it empty.
      * This does NOT change the fill-type setting.
@@ -92,7 +92,7 @@
         EVEN_ODD        (GeneralPath.WIND_EVEN_ODD, false),
         INVERSE_WINDING (GeneralPath.WIND_NON_ZERO, true),
         INVERSE_EVEN_ODD(GeneralPath.WIND_EVEN_ODD, true);
-        
+
         FillType(int rule, boolean inverse) {
             this.rule = rule;
             this.inverse = inverse;
@@ -101,7 +101,7 @@
         final int rule;
         final boolean inverse;
     }
-    
+
     /**
      * Return the path's fill type. This defines how "inside" is
      * computed. The default value is WINDING.
@@ -121,7 +121,7 @@
         mFillType = ft;
         mPath.setWindingRule(ft.rule);
     }
-    
+
     /**
      * Returns true if the filltype is one of the INVERSE variants
      *
@@ -130,7 +130,7 @@
     public boolean isInverseFillType() {
         return mFillType.inverse;
     }
-    
+
     /**
      * Toggles the INVERSE state of the filltype
      */
@@ -150,7 +150,7 @@
                 break;
         }
     }
-    
+
     /**
      * Returns true if the path is empty (contains no lines or curves)
      *
@@ -350,7 +350,7 @@
                       boolean forceMoveTo) {
         throw new UnsupportedOperationException();
     }
-    
+
     /**
      * Append the specified arc to the path as a new contour. If the start of
      * the path is different from the path's current last point, then an
@@ -365,7 +365,7 @@
     public void arcTo(RectF oval, float startAngle, float sweepAngle) {
         throw new UnsupportedOperationException();
     }
-    
+
     /**
      * Close the current contour. If the current point is not equal to the
      * first point of the contour, a line segment is automatically added.
@@ -383,13 +383,13 @@
         CW  (0),    // must match enum in SkPath.h
         /** counter-clockwise */
         CCW (1);    // must match enum in SkPath.h
-        
+
         Direction(int ni) {
             nativeInt = ni;
         }
         final int nativeInt;
     }
-    
+
     /**
      * Add a closed rectangle contour to the path
      *
@@ -400,7 +400,7 @@
         if (rect == null) {
             throw new NullPointerException("need rect parameter");
         }
-        
+
         addRect(rect.left, rect.top, rect.right, rect.bottom, dir);
     }
 
@@ -446,7 +446,7 @@
 
         // FIXME Need to support direction
         Ellipse2D ovalShape = new Ellipse2D.Float(oval.left, oval.top, oval.width(), oval.height());
-        
+
         mPath.append(ovalShape, false /* connect */);
     }
 
@@ -493,7 +493,7 @@
         // FIXME
         throw new UnsupportedOperationException();
     }
-    
+
     /**
      * Add a closed round-rectangle contour to the path. Each corner receives
      * two radius values [X, Y]. The corners are ordered top-left, top-right,
@@ -513,7 +513,7 @@
         // FIXME
         throw new UnsupportedOperationException();
     }
-    
+
     /**
      * Add a copy of src to the path, offset by (dx,dy)
      *
@@ -554,11 +554,11 @@
      */
     public void offset(float dx, float dy, Path dst) {
         GeneralPath newPath = new GeneralPath();
-        
+
         PathIterator iterator = mPath.getPathIterator(new AffineTransform(0, 0, dx, 0, 0, dy));
-        
+
         newPath.append(iterator, false /* connect */);
-        
+
         if (dst != null) {
             dst.mPath = newPath;
         } else {
diff --git a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/DelegateManager.java b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/DelegateManager.java
new file mode 100644
index 0000000..3d9f960
--- /dev/null
+++ b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/DelegateManager.java
@@ -0,0 +1,89 @@
+/*
+ * 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.
+ */
+
+package com.android.layoutlib.bridge;
+
+import android.util.SparseArray;
+
+/**
+ * Manages native delegates.
+ *
+ * This is used in conjunction with layoublib_create: certain Android java classes are mere
+ * wrappers around a heavily native based implementation, and we need a way to run these classes
+ * in our Eclipse rendering framework without bringing all the native code from the Android
+ * platform.
+ *
+ * Thus we instruct layoutlib_create to modify the bytecode of these classes to replace their
+ * native methods by "delegate calls".
+ *
+ * For example, a native method android.graphics.Matrix.init(...) will actually become
+ * a call to android.graphics.Matrix_Delegate.init(...).
+ *
+ * The Android java classes that use native code uses an int (Java side) to reference native
+ * objects. This int is generally directly the pointer to the C structure counterpart.
+ * Typically a creation method will return such an int, and then this int will be passed later
+ * to a Java method to identify the C object to manipulate.
+ *
+ * Since we cannot use the Java object reference as the int directly, DelegateManager manages the
+ * int -> Delegate class link.
+ *
+ * Native methods usually always have the int as parameters. The first thing the delegate method
+ * will do is call {@link #getDelegate(int)} to get the Java object matching the int.
+ *
+ * Typical native init methods are returning a new int back to the Java class, so
+ * {@link #addDelegate(Object)} does the same.
+ *
+ * @param <T> the delegate class to manage
+ */
+public final class DelegateManager<T> {
+
+    private final SparseArray<T> mDelegates = new SparseArray<T>();
+    private int mDelegateCounter = 0;
+
+    /**
+     * Returns the delegate from the given native int.
+     * @param native_object the native int.
+     * @return the delegate or null if not found.
+     */
+    public T getDelegate(int native_object) {
+        synchronized (mDelegates) {
+            return mDelegates.get(native_object);
+        }
+    }
+
+    /**
+     * Adds a delegate to the manager and returns the native int used to identify it.
+     * @param newDelegate the delegate to add
+     * @return a unique native int to identify the delegate
+     */
+    public int addDelegate(T newDelegate) {
+        synchronized (mDelegates) {
+            int native_object = ++mDelegateCounter;
+            mDelegates.put(native_object, newDelegate);
+            return native_object;
+        }
+    }
+
+    /**
+     * Removes the delegate matching the given native int.
+     * @param native_object the native int.
+     */
+    public void removeDelegate(int native_object) {
+        synchronized (mDelegates) {
+            mDelegates.remove(native_object);
+        }
+    }
+}
diff --git a/tools/layoutlib/bridge/tests/com/android/layoutlib/bridge/TestNativeDelegate.java b/tools/layoutlib/bridge/tests/com/android/layoutlib/bridge/TestNativeDelegate.java
new file mode 100644
index 0000000..6eed8ba
--- /dev/null
+++ b/tools/layoutlib/bridge/tests/com/android/layoutlib/bridge/TestNativeDelegate.java
@@ -0,0 +1,115 @@
+/*
+ * 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.
+ */
+
+package com.android.layoutlib.bridge;
+
+import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
+import com.android.tools.layoutlib.create.CreateInfo;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+import junit.framework.TestCase;
+
+/**
+ * Tests that native delegate classes implement all the required methods.
+ *
+ * This looks at {@link CreateInfo#DELEGATE_CLASS_NATIVES} to get the list of classes that
+ * have their native methods reimplemented through a delegate.
+ *
+ * Since the reimplemented methods are not native anymore, we look for the annotation
+ * {@link LayoutlibDelegate}, and look for a matching method in the delegate (named the same
+ * as the modified class with _Delegate added as a suffix).
+ * If the original native method is not static, then we make sure the delegate method also
+ * include the original class as first parameter (to access "this").
+ *
+ */
+public class TestNativeDelegate extends TestCase {
+
+    public void  testNativeDelegates() {
+
+        final String[] classes = CreateInfo.DELEGATE_CLASS_NATIVES;
+        final int count = classes.length;
+        for (int i = 0 ; i < count ; i++) {
+            loadAndCompareClasses(classes[i], classes[i] + "_Delegate");
+        }
+    }
+
+    private void loadAndCompareClasses(String originalClassName, String delegateClassName) {
+        // load the classes
+        try {
+            ClassLoader classLoader = TestNativeDelegate.class.getClassLoader();
+            Class<?> originalClass = classLoader.loadClass(originalClassName);
+            Class<?> delegateClass = classLoader.loadClass(delegateClassName);
+
+            compare(originalClass, delegateClass);
+        } catch (ClassNotFoundException e) {
+           fail("Failed to load class: " + e.getMessage());
+        } catch (SecurityException e) {
+            fail("Failed to load class: " + e.getMessage());
+        }
+    }
+
+    private void compare(Class<?> originalClass, Class<?> delegateClass) throws SecurityException {
+        Method[] originalMethods = originalClass.getDeclaredMethods();
+
+        for (Method originalMethod : originalMethods) {
+            // look for methods that were native: they have the LayoutlibDelegate annotation
+            if (originalMethod.getAnnotation(LayoutlibDelegate.class) == null) {
+                continue;
+            }
+
+            // get the signature.
+            Class<?>[] parameters = originalMethod.getParameterTypes();
+
+            // if the method is not static, then the class is added as the first parameter
+            // (for "this")
+            if ((originalMethod.getModifiers() & Modifier.STATIC) == 0) {
+
+                Class<?>[] newParameters = new Class<?>[parameters.length + 1];
+                newParameters[0] = originalClass;
+                System.arraycopy(parameters, 0, newParameters, 1, parameters.length);
+                parameters = newParameters;
+            }
+
+            try {
+                // try to load the method with the given parameter types.
+                delegateClass.getMethod(originalMethod.getName(), parameters);
+            } catch (NoSuchMethodException e) {
+                // compute a full class name that's long but not too long.
+                StringBuilder sb = new StringBuilder(originalMethod.getName() + "(");
+                for (int j = 0; j < parameters.length; j++) {
+                    Class<?> theClass = parameters[j];
+                    sb.append(theClass.getName());
+                    int dimensions = 0;
+                    while (theClass.isArray()) {
+                        dimensions++;
+                        theClass = theClass.getComponentType();
+                    }
+                    for (int i = 0; i < dimensions; i++) {
+                        sb.append("[]");
+                    }
+                    if (j < (parameters.length - 1)) {
+                        sb.append(",");
+                    }
+                }
+                sb.append(")");
+
+                fail(String.format("Missing %1$s.%2$s", delegateClass.getName(), sb.toString()));
+            }
+        }
+    }
+}
diff --git a/tools/layoutlib/create/src/com/android/tools/layoutlib/create/CreateInfo.java b/tools/layoutlib/create/src/com/android/tools/layoutlib/create/CreateInfo.java
index 92892784..2d0ee6d 100644
--- a/tools/layoutlib/create/src/com/android/tools/layoutlib/create/CreateInfo.java
+++ b/tools/layoutlib/create/src/com/android/tools/layoutlib/create/CreateInfo.java
@@ -16,6 +16,8 @@
 
 package com.android.tools.layoutlib.create;
 
+import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
+
 /**
  * Describes the work to be done by {@link AsmGenerator}.
  */
@@ -83,7 +85,9 @@
             OverrideMethod.class,
             MethodListener.class,
             MethodAdapter.class,
-            CreateInfo.class
+            ICreateInfo.class,
+            CreateInfo.class,
+            LayoutlibDelegate.class
         };
 
     /**
@@ -99,8 +103,7 @@
      * The list of classes on which to delegate all native methods.
      */
     private final static String[] DELEGATE_CLASS_NATIVES = new String[] {
-        // TODO: comment out once DelegateClass is working
-        // "android.graphics.Paint"
+        "android.graphics.Matrix",
     };
 
     /**
@@ -126,7 +129,6 @@
             "android.graphics.ComposeShader",       "android.graphics._Original_ComposeShader",
             "android.graphics.DashPathEffect",       "android.graphics._Original_DashPathEffect",
             "android.graphics.LinearGradient",      "android.graphics._Original_LinearGradient",
-            "android.graphics.Matrix",              "android.graphics._Original_Matrix",
             "android.graphics.Paint",               "android.graphics._Original_Paint",
             "android.graphics.Path",                "android.graphics._Original_Path",
             "android.graphics.PorterDuffXfermode",  "android.graphics._Original_PorterDuffXfermode",