get Calculate Real Scale from matrix - Android android.graphics

Android examples for android.graphics:Matrix

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Description

get Calculate Real Scale from matrix

Demo Code

/*//from  www .  ja  v  a  2  s  .c o  m
 * Copyright (C) 2012 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.java2s;

import android.graphics.Matrix;

public class Main {
    public static float getCalculateRealScale(Matrix matrix) {
        float[] v = new float[9];
        matrix.getValues(v);
        float scalex = v[Matrix.MSCALE_X];
        float skewy = v[Matrix.MSKEW_Y];
        float rScale = (float) Math.sqrt(scalex * scalex + skewy * skewy);

        return rScale;
    }
}

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