TransformUtils.java

/*************************************************************************
* Copyright (c) 2015 Lemberg Solutions
*
* 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.ls.widgets.map.utils;

import android.graphics.Matrix;
import android.graphics.Rect;

public class TransformUtils 
{
    private static final Matrix matrix = new Matrix();
    
	public static Rect scaleRect(Rect coords, float scale, int pivotX, int pivotY)
	{
	    matrix.reset();
		matrix.setScale(scale, scale, pivotX, pivotY);
		
		float[] result = {coords.left, coords.top, coords.right, coords.bottom};
		matrix.mapPoints(result);
		
		return new Rect((int)result[0], (int)result[1], (int)result[2], (int)result[3]);
	}
}