package util;

import java.awt.Toolkit;

import java.awt.image.BufferedImage;

import java.awt.image.ColorModel;

import java.awt.image.DataBuffer;

import java.awt.image.DataBufferInt;

import java.awt.image.DirectColorModel;

import java.awt.image.PixelGrabber;

import java.awt.image.Raster;

import java.awt.image.WritableRaster;

import java.io.File;

/*

 * 处理图片的工具类：

 * 定义了3个方法

 */

public class ImageUtil {

    //图片格式的转换，统一转换成.jpg格式

    public static BufferedImage change2jpg(File f) {

        try {

            java.awt.Image i = Toolkit.getDefaultToolkit().createImage(f.getAbsolutePath());

            PixelGrabber pg = new PixelGrabber(i, 0, 0, -1, -1, true);

            pg.grabPixels();

            int width = pg.getWidth(), height = pg.getHeight();

            final int[] RGB_MASKS = { 0xFF0000, 0xFF00, 0xFF };

            final ColorModel RGB_OPAQUE = new DirectColorModel(32, RGB_MASKS[0], RGB_MASKS[1], RGB_MASKS[2]);

            DataBuffer buffer = new DataBufferInt((int[]) pg.getPixels(), pg.getWidth() * pg.getHeight());

            WritableRaster raster = Raster.createPackedRaster(buffer, width, height, width, RGB_MASKS, null);

            BufferedImage img = new BufferedImage(RGB_OPAQUE, raster, false, null);

            return img;

        } catch (InterruptedException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

            return null;

        }

    }

}