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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 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.
*/
package android.graphics;
import dalvik.annotation.optimization.CriticalNative;
import dalvik.annotation.optimization.FastNative;
import libcore.util.NativeAllocationRegistry;
import java.io.PrintWriter;
/**
* The Matrix class holds a 3x3 matrix for transforming coordinates.
*/
public class Matrix {
public static final int MSCALE_X = 0; //!< use with getValues/setValues
public static final int MSKEW_X = 1; //!< use with getValues/setValues
public static final int MTRANS_X = 2; //!< use with getValues/setValues
public static final int MSKEW_Y = 3; //!< use with getValues/setValues
public static final int MSCALE_Y = 4; //!< use with getValues/setValues
public static final int MTRANS_Y = 5; //!< use with getValues/setValues
public static final int MPERSP_0 = 6; //!< use with getValues/setValues
public static final int MPERSP_1 = 7; //!< use with getValues/setValues
public static final int MPERSP_2 = 8; //!< use with getValues/setValues
/** @hide */
public final static Matrix IDENTITY_MATRIX = new Matrix() {
void oops() {
throw new IllegalStateException("Matrix can not be modified");
}
@Override
public void set(Matrix src) {
oops();
}
@Override
public void reset() {
oops();
}
@Override
public void setTranslate(float dx, float dy) {
oops();
}
@Override
public void setScale(float sx, float sy, float px, float py) {
oops();
}
@Override
public void setScale(float sx, float sy) {
oops();
}
@Override
public void setRotate(float degrees, float px, float py) {
oops();
}
@Override
public void setRotate(float degrees) {
oops();
}
@Override
public void setSinCos(float sinValue, float cosValue, float px, float py) {
oops();
}
@Override
public void setSinCos(float sinValue, float cosValue) {
oops();
}
@Override
public void setSkew(float kx, float ky, float px, float py) {
oops();
}
@Override
public void setSkew(float kx, float ky) {
oops();
}
@Override
public boolean setConcat(Matrix a, Matrix b) {
oops();
return false;
}
@Override
public boolean preTranslate(float dx, float dy) {
oops();
return false;
}
@Override
public boolean preScale(float sx, float sy, float px, float py) {
oops();
return false;
}
@Override
public boolean preScale(float sx, float sy) {
oops();
return false;
}
@Override
public boolean preRotate(float degrees, float px, float py) {
oops();
return false;
}
@Override
public boolean preRotate(float degrees) {
oops();
return false;
}
@Override
public boolean preSkew(float kx, float ky, float px, float py) {
oops();
return false;
}
@Override
public boolean preSkew(float kx, float ky) {
oops();
return false;
}
@Override
public boolean preConcat(Matrix other) {
oops();
return false;
}
@Override
public boolean postTranslate(float dx, float dy) {
oops();
return false;
}
@Override
public boolean postScale(float sx, float sy, float px, float py) {
oops();
return false;
}
@Override
public boolean postScale(float sx, float sy) {
oops();
return false;
}
@Override
public boolean postRotate(float degrees, float px, float py) {
oops();
return false;
}
@Override
public boolean postRotate(float degrees) {
oops();
return false;
}
@Override
public boolean postSkew(float kx, float ky, float px, float py) {
oops();
return false;
}
@Override
public boolean postSkew(float kx, float ky) {
oops();
return false;
}
@Override
public boolean postConcat(Matrix other) {
oops();
return false;
}
@Override
public boolean setRectToRect(RectF src, RectF dst, ScaleToFit stf) {
oops();
return false;
}
@Override
public boolean setPolyToPoly(float[] src, int srcIndex, float[] dst, int dstIndex,
int pointCount) {
oops();
return false;
}
@Override
public void setValues(float[] values) {
oops();
}
};
// sizeof(SkMatrix) is 9 * sizeof(float) + uint32_t
private static final long NATIVE_ALLOCATION_SIZE = 40;
private static class NoImagePreloadHolder {
public static final NativeAllocationRegistry sRegistry = new NativeAllocationRegistry(
Matrix.class.getClassLoader(), nGetNativeFinalizer(), NATIVE_ALLOCATION_SIZE);
}
/**
* @hide
*/
public final long native_instance;
/**
* Create an identity matrix
*/
public Matrix() {
native_instance = nCreate(0);
NoImagePreloadHolder.sRegistry.registerNativeAllocation(this, native_instance);
}
/**
* Create a matrix that is a (deep) copy of src
*
* @param src The matrix to copy into this matrix
*/
public Matrix(Matrix src) {
native_instance = nCreate(src != null ? src.native_instance : 0);
NoImagePreloadHolder.sRegistry.registerNativeAllocation(this, native_instance);
}
/**
* Returns true if the matrix is identity. This maybe faster than testing if (getType() == 0)
*/
public boolean isIdentity() {
return nIsIdentity(native_instance);
}
/**
* Gets whether this matrix is affine. An affine matrix preserves straight lines and has no
* perspective.
*
* @return Whether the matrix is affine.
*/
public boolean isAffine() {
return nIsAffine(native_instance);
}
/**
* 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.
*/
public boolean rectStaysRect() {
return nRectStaysRect(native_instance);
}
/**
* (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 {
nSet(native_instance, src.native_instance);
}
}
/**
* Returns true iff obj is a Matrix and its values equal our values.
*/
@Override
public boolean equals(Object obj) {
// if (obj == this) return true; -- NaN value would mean matrix != itself
if (!(obj instanceof Matrix)) {
return false;
}
return nEquals(native_instance, ((Matrix) obj).native_instance);
}
@Override
public int hashCode() {
// This should generate the hash code by performing some arithmetic operation on all
// the matrix elements -- our equals() does an element-by-element comparison, and we
// need to ensure that the hash code for two equal objects is the same. We're not
// really using this at the moment, so we take the easy way out.
return 44;
}
/** Set the matrix to identity */
public void reset() {
nReset(native_instance);
}
/** Set the matrix to translate by (dx, dy). */
public void setTranslate(float dx, float dy) {
nSetTranslate(native_instance, dx, dy);
}
/**
* 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.
*/
public void setScale(float sx, float sy, float px, float py) {
nSetScale(native_instance, sx, sy, px, py);
}
/** Set the matrix to scale by sx and sy. */
public void setScale(float sx, float sy) {
nSetScale(native_instance, sx, sy);
}
/**
* 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.
*/
public void setRotate(float degrees, float px, float py) {
nSetRotate(native_instance, degrees, px, py);
}
/**
* Set the matrix to rotate about (0,0) by the specified number of degrees.
*/
public void setRotate(float degrees) {
nSetRotate(native_instance, degrees);
}
/**
* 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.
*/
public void setSinCos(float sinValue, float cosValue, float px, float py) {
nSetSinCos(native_instance, sinValue, cosValue, px, py);
}
/** Set the matrix to rotate by the specified sine and cosine values. */
public void setSinCos(float sinValue, float cosValue) {
nSetSinCos(native_instance, sinValue, cosValue);
}
/**
* 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.
*/
public void setSkew(float kx, float ky, float px, float py) {
nSetSkew(native_instance, kx, ky, px, py);
}
/** Set the matrix to skew by sx and sy. */
public void setSkew(float kx, float ky) {
nSetSkew(native_instance, kx, ky);
}
/**
* Set the matrix to the concatenation of the two specified matrices and return true.
*
* Either of the two matrices may also be the target matrix, that is
* matrixA.setConcat(matrixA, matrixB); is valid.
*
*
* In {@link android.os.Build.VERSION_CODES#GINGERBREAD_MR1} and below, this function returns
* true only if the result can be represented. In
* {@link android.os.Build.VERSION_CODES#HONEYCOMB} and above, it always returns true.
*
*/
public boolean setConcat(Matrix a, Matrix b) {
nSetConcat(native_instance, a.native_instance, b.native_instance);
return true;
}
/**
* Preconcats the matrix with the specified translation. M' = M * T(dx, dy)
*/
public boolean preTranslate(float dx, float dy) {
nPreTranslate(native_instance, dx, dy);
return true;
}
/**
* Preconcats the matrix with the specified scale. M' = M * S(sx, sy, px, py)
*/
public boolean preScale(float sx, float sy, float px, float py) {
nPreScale(native_instance, sx, sy, px, py);
return true;
}
/**
* Preconcats the matrix with the specified scale. M' = M * S(sx, sy)
*/
public boolean preScale(float sx, float sy) {
nPreScale(native_instance, sx, sy);
return true;
}
/**
* Preconcats the matrix with the specified rotation. M' = M * R(degrees, px, py)
*/
public boolean preRotate(float degrees, float px, float py) {
nPreRotate(native_instance, degrees, px, py);
return true;
}
/**
* Preconcats the matrix with the specified rotation. M' = M * R(degrees)
*/
public boolean preRotate(float degrees) {
nPreRotate(native_instance, degrees);
return true;
}
/**
* Preconcats the matrix with the specified skew. M' = M * K(kx, ky, px, py)
*/
public boolean preSkew(float kx, float ky, float px, float py) {
nPreSkew(native_instance, kx, ky, px, py);
return true;
}
/**
* Preconcats the matrix with the specified skew. M' = M * K(kx, ky)
*/
public boolean preSkew(float kx, float ky) {
nPreSkew(native_instance, kx, ky);
return true;
}
/**
* Preconcats the matrix with the specified matrix. M' = M * other
*/
public boolean preConcat(Matrix other) {
nPreConcat(native_instance, other.native_instance);
return true;
}
/**
* Postconcats the matrix with the specified translation. M' = T(dx, dy) * M
*/
public boolean postTranslate(float dx, float dy) {
nPostTranslate(native_instance, dx, dy);
return true;
}
/**
* Postconcats the matrix with the specified scale. M' = S(sx, sy, px, py) * M
*/
public boolean postScale(float sx, float sy, float px, float py) {
nPostScale(native_instance, sx, sy, px, py);
return true;
}
/**
* Postconcats the matrix with the specified scale. M' = S(sx, sy) * M
*/
public boolean postScale(float sx, float sy) {
nPostScale(native_instance, sx, sy);
return true;
}
/**
* Postconcats the matrix with the specified rotation. M' = R(degrees, px, py) * M
*/
public boolean postRotate(float degrees, float px, float py) {
nPostRotate(native_instance, degrees, px, py);
return true;
}
/**
* Postconcats the matrix with the specified rotation. M' = R(degrees) * M
*/
public boolean postRotate(float degrees) {
nPostRotate(native_instance, degrees);
return true;
}
/**
* Postconcats the matrix with the specified skew. M' = K(kx, ky, px, py) * M
*/
public boolean postSkew(float kx, float ky, float px, float py) {
nPostSkew(native_instance, kx, ky, px, py);
return true;
}
/**
* Postconcats the matrix with the specified skew. M' = K(kx, ky) * M
*/
public boolean postSkew(float kx, float ky) {
nPostSkew(native_instance, kx, ky);
return true;
}
/**
* Postconcats the matrix with the specified matrix. M' = other * M
*/
public boolean postConcat(Matrix other) {
nPostConcat(native_instance, other.native_instance);
return true;
}
/**
* 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 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();
}
return nSetRectToRect(native_instance, src, dst, stf.nativeInt);
}
// private helper to perform range checks on arrays of "points"
private static void checkPointArrays(float[] src, int srcIndex,
float[] dst, int dstIndex,
int pointCount) {
// check for too-small and too-big indices
int srcStop = srcIndex + (pointCount << 1);
int dstStop = dstIndex + (pointCount << 1);
if ((pointCount | srcIndex | dstIndex | srcStop | dstStop) < 0 ||
srcStop > src.length || dstStop > dst.length) {
throw new ArrayIndexOutOfBoundsException();
}
}
/**
* 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
*/
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);
return nSetPolyToPoly(native_instance, src, srcIndex,
dst, dstIndex, pointCount);
}
/**
* 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) {
return nInvert(native_instance, inverse.native_instance);
}
/**
* 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
*/
public void mapPoints(float[] dst, int dstIndex, float[] src, int srcIndex,
int pointCount) {
checkPointArrays(src, srcIndex, dst, dstIndex, pointCount);
nMapPoints(native_instance, dst, dstIndex, src, srcIndex,
pointCount, true);
}
/**
* 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]. Note: this method does not apply the translation associated with
* the matrix. Use {@link Matrix#mapPoints(float[], int, float[], int, int)} if you want the
* translation to be applied.
*
* @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
*/
public void mapVectors(float[] dst, int dstIndex, float[] src, int srcIndex,
int vectorCount) {
checkPointArrays(src, srcIndex, dst, dstIndex, vectorCount);
nMapPoints(native_instance, dst, dstIndex, src, srcIndex,
vectorCount, false);
}
/**
* 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)
*/
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]. Note: this method does not apply the translation associated with
* the matrix. Use {@link Matrix#mapPoints(float[], float[])} if you want the translation to be
* applied.
*
* @param dst The array of dst vectors (x,y pairs)
* @param src The array of src vectors (x,y pairs)
*/
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.
*/
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. Note: this method does not apply the translation associated with the matrix. Use
* {@link Matrix#mapPoints(float[])} if you want the translation to be applied.
*
* @param vecs The array [x0, y0, x1, y1, ...] of vectors to transform.
*/
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()
*/
public boolean mapRect(RectF dst, RectF src) {
if (dst == null || src == null) {
throw new NullPointerException();
}
return nMapRect(native_instance, dst, src);
}
/**
* 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()
*/
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.
*/
public float mapRadius(float radius) {
return nMapRadius(native_instance, radius);
}
/**
* Copy 9 values from the matrix into the array.
*/
public void getValues(float[] values) {
if (values.length < 9) {
throw new ArrayIndexOutOfBoundsException();
}
nGetValues(native_instance, values);
}
/**
* 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.
*/
public void setValues(float[] values) {
if (values.length < 9) {
throw new ArrayIndexOutOfBoundsException();
}
nSetValues(native_instance, values);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(64);
sb.append("Matrix{");
toShortString(sb);
sb.append('}');
return sb.toString();
}
public String toShortString() {
StringBuilder sb = new StringBuilder(64);
toShortString(sb);
return sb.toString();
}
/**
* @hide
*/
public void toShortString(StringBuilder sb) {
float[] values = new float[9];
getValues(values);
sb.append('[');
sb.append(values[0]);
sb.append(", ");
sb.append(values[1]);
sb.append(", ");
sb.append(values[2]);
sb.append("][");
sb.append(values[3]);
sb.append(", ");
sb.append(values[4]);
sb.append(", ");
sb.append(values[5]);
sb.append("][");
sb.append(values[6]);
sb.append(", ");
sb.append(values[7]);
sb.append(", ");
sb.append(values[8]);
sb.append(']');
}
/**
* Print short string, to optimize dumping.
*
* @hide
*/
public void printShortString(PrintWriter pw) {
float[] values = new float[9];
getValues(values);
pw.print('[');
pw.print(values[0]);
pw.print(", ");
pw.print(values[1]);
pw.print(", ");
pw.print(values[2]);
pw.print("][");
pw.print(values[3]);
pw.print(", ");
pw.print(values[4]);
pw.print(", ");
pw.print(values[5]);
pw.print("][");
pw.print(values[6]);
pw.print(", ");
pw.print(values[7]);
pw.print(", ");
pw.print(values[8]);
pw.print(']');
}
/** @hide */
public final long ni() {
return native_instance;
}
// ------------------ Regular JNI ------------------------
private static native long nCreate(long nSrc_or_zero);
private static native long nGetNativeFinalizer();
// ------------------ Fast JNI ------------------------
@FastNative
private static native boolean nSetRectToRect(long nObject,
RectF src, RectF dst, int stf);
@FastNative
private static native boolean nSetPolyToPoly(long nObject,
float[] src, int srcIndex, float[] dst, int dstIndex, int pointCount);
@FastNative
private static native void nMapPoints(long nObject,
float[] dst, int dstIndex, float[] src, int srcIndex,
int ptCount, boolean isPts);
@FastNative
private static native boolean nMapRect(long nObject, RectF dst, RectF src);
@FastNative
private static native void nGetValues(long nObject, float[] values);
@FastNative
private static native void nSetValues(long nObject, float[] values);
// ------------------ Critical JNI ------------------------
@CriticalNative
private static native boolean nIsIdentity(long nObject);
@CriticalNative
private static native boolean nIsAffine(long nObject);
@CriticalNative
private static native boolean nRectStaysRect(long nObject);
@CriticalNative
private static native void nReset(long nObject);
@CriticalNative
private static native void nSet(long nObject, long nOther);
@CriticalNative
private static native void nSetTranslate(long nObject, float dx, float dy);
@CriticalNative
private static native void nSetScale(long nObject, float sx, float sy, float px, float py);
@CriticalNative
private static native void nSetScale(long nObject, float sx, float sy);
@CriticalNative
private static native void nSetRotate(long nObject, float degrees, float px, float py);
@CriticalNative
private static native void nSetRotate(long nObject, float degrees);
@CriticalNative
private static native void nSetSinCos(long nObject, float sinValue, float cosValue,
float px, float py);
@CriticalNative
private static native void nSetSinCos(long nObject, float sinValue, float cosValue);
@CriticalNative
private static native void nSetSkew(long nObject, float kx, float ky, float px, float py);
@CriticalNative
private static native void nSetSkew(long nObject, float kx, float ky);
@CriticalNative
private static native void nSetConcat(long nObject, long nA, long nB);
@CriticalNative
private static native void nPreTranslate(long nObject, float dx, float dy);
@CriticalNative
private static native void nPreScale(long nObject, float sx, float sy, float px, float py);
@CriticalNative
private static native void nPreScale(long nObject, float sx, float sy);
@CriticalNative
private static native void nPreRotate(long nObject, float degrees, float px, float py);
@CriticalNative
private static native void nPreRotate(long nObject, float degrees);
@CriticalNative
private static native void nPreSkew(long nObject, float kx, float ky, float px, float py);
@CriticalNative
private static native void nPreSkew(long nObject, float kx, float ky);
@CriticalNative
private static native void nPreConcat(long nObject, long nOther_matrix);
@CriticalNative
private static native void nPostTranslate(long nObject, float dx, float dy);
@CriticalNative
private static native void nPostScale(long nObject, float sx, float sy, float px, float py);
@CriticalNative
private static native void nPostScale(long nObject, float sx, float sy);
@CriticalNative
private static native void nPostRotate(long nObject, float degrees, float px, float py);
@CriticalNative
private static native void nPostRotate(long nObject, float degrees);
@CriticalNative
private static native void nPostSkew(long nObject, float kx, float ky, float px, float py);
@CriticalNative
private static native void nPostSkew(long nObject, float kx, float ky);
@CriticalNative
private static native void nPostConcat(long nObject, long nOther_matrix);
@CriticalNative
private static native boolean nInvert(long nObject, long nInverse);
@CriticalNative
private static native float nMapRadius(long nObject, float radius);
@CriticalNative
private static native boolean nEquals(long nA, long nB);
}