이미지 돌리면서 배경 투명 이미지로 만들기

이미지 돌리면서 배경 투명 이미지로 만들기

1. 배경용 투명 이미지 필요

2. 돌리려는 이미지 필요

3. 이 예제는 화살표를 360도 모두 만드려고 생성한 소스

import java.awt.Font;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.imageio.ImageWriteParam;

import javax.imageio.ImageWriter;

import javax.imageio.stream.ImageOutputStream;

import javax.swing.text.html.HTMLDocument.Iterator;

import android.R.color;

public class ImageRotate {

public static void main(String[] args) throws IOException{

System.out.println("## START");

File oldFile = new File("c:/testdata/image/arrow.png");

BufferedImage oldImage = ImageIO.read(new FileInputStream(oldFile));

BufferedImage emptyIm = ImageIO.read(new File("c:/testdata/image/back.png"));

int width = 35;

int height = 35;

for(double degree=0; degree < 360; degree++){

File newFile = new File("c:/testdata/image/arrow/arrow_" + ((int)degree) + ".png");

BufferedImage im = ImageIO.read(oldFile);

BufferedImage bd = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

Graphics2D g2 = (Graphics2D) bd.getGraphics();

//background set

g2.drawImage(emptyIm, null, 0, 0);

//im draw in background

BufferedImage newImage = new BufferedImage(oldImage.getHeight(), oldImage.getWidth(), oldImage.getType());

g2.rotate(Math.toRadians(degree), newImage.getWidth() / 2, newImage.getHeight() / 2);

g2.drawImage(oldImage, 0, 0, oldImage.getWidth(), oldImage.getHeight(), null);

//g2.drawImage(im, 0, 0, 6, 50, null);

//image to byte

ByteArrayOutputStream baos = new ByteArrayOutputStream();

ImageIO.write(bd, "png", new FileOutputStream(newFile));

}

        

System.out.println("## END");

}

}