save scaled smaller Photo - Java 2D Graphics

Java examples for 2D Graphics:Image File

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Description

save scaled smaller Photo

Demo Code


//package com.java2s;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class Main {


    public static void saveMinPhoto(String srcURL, String deskURL,
            double comBase, double scale) throws Exception {
        File srcFile = new java.io.File(srcURL);
        Image src = ImageIO.read(srcFile);
        int srcHeight = src.getHeight(null);
        int srcWidth = src.getWidth(null);
        int deskHeight = 0;// 
        int deskWidth = 0;// 
        double srcScale = (double) srcHeight / srcWidth;
        /** ? *///from w w w .jav a 2s.c o m
        if ((double) srcHeight > comBase || (double) srcWidth > comBase) {
            if (srcScale >= scale || 1 / srcScale > scale) {
                if (srcScale >= scale) {
                    deskHeight = (int) comBase;
                    deskWidth = srcWidth * deskHeight / srcHeight;
                } else {
                    deskWidth = (int) comBase;
                    deskHeight = srcHeight * deskWidth / srcWidth;
                }
            } else {
                if ((double) srcHeight > comBase) {
                    deskHeight = (int) comBase;
                    deskWidth = srcWidth * deskHeight / srcHeight;
                } else {
                    deskWidth = (int) comBase;
                    deskHeight = srcHeight * deskWidth / srcWidth;
                }
            }
        } else {
            deskHeight = srcHeight;
            deskWidth = srcWidth;
        }
        BufferedImage tag = new BufferedImage(deskWidth, deskHeight,
                BufferedImage.TYPE_3BYTE_BGR);
        tag.getGraphics().drawImage(src, 0, 0, deskWidth, deskHeight, null); // 
        String formatName = deskURL.substring(deskURL.lastIndexOf(".") + 1);
        ImageIO.write(tag, formatName, new File(deskURL));
    }
}

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