Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2014 zzl09
 *
 * 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.
 */

public class Main {
    private static int calculateInSampleSize(float outWidth, float outHeight, float reqWidth, float reqHeight) {
        int inSampleSize = 1;
        if (reqHeight == 0 || reqWidth == 0) {
            return inSampleSize;
        }
        if (outHeight > reqHeight || outWidth > reqWidth) {
            final int heightRatio = Math.round(outHeight / reqHeight);
            final int widthRatio = Math.round(outWidth / reqWidth);
            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
        }

        final float totalPixels = outWidth * outHeight;
        final float totalReqPixelsCap = reqWidth * reqHeight * 2;

        while (totalPixels / (inSampleSize * inSampleSize) > totalReqPixelsCap) {
            inSampleSize++;
        }

        return inSampleSize;
    }
}