Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2016 Peng fei Pan <sky@xiaopan.me>
 *
 * 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.
 */

import android.graphics.Rect;

public class Main {
    public static void mapping(int sourceWidth, int sourceHeight, int targetWidth, int targetHeight, Rect rect) {
        float widthScale = (float) sourceWidth / targetWidth;
        float heightScale = (float) sourceHeight / targetHeight;
        float finalScale = widthScale < heightScale ? widthScale : heightScale;
        int srcWidth = (int) (targetWidth * finalScale);
        int srcHeight = (int) (targetHeight * finalScale);
        int srcLeft = (sourceWidth - srcWidth) / 2;
        int srcTop = (sourceHeight - srcHeight) / 2;
        rect.set(srcLeft, srcTop, srcLeft + srcWidth, srcTop + srcHeight);
    }
}