/**
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* Copyright (c) 2015-2016, Michael Yang 杨福海 (fuhai999@gmail.com).
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* <p>
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* Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.gnu.org/licenses/lgpl-3.0.txt
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.terra.proxy.util;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageReadParam;
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import javax.imageio.ImageReader;
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import javax.imageio.stream.ImageInputStream;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Iterator;
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/**
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* @author lanbase
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* @Description: TODO(图片处理)
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* @date 2017-6-23 15:07
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*/
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public class ImageUtils {
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public static int[] ratio(String src) throws IOException {
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BufferedImage bufferedImage = ImageIO.read(new File(src));
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int width = bufferedImage.getWidth();
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int height = bufferedImage.getHeight();
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return new int[]{width, height};
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}
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public static String ratioAsString(String src) throws IOException {
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File file = new File(src);
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if (!file.exists()) {
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return null;
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}
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BufferedImage bufferedImage = ImageIO.read(file);
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int width = bufferedImage.getWidth();
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int height = bufferedImage.getHeight();
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return String.format("%s x %s", width, height);
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}
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public static String scale(String src, int w, int h) throws IOException {
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int inserTo = src.lastIndexOf(".");
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String dest = src.substring(0, inserTo) + String.format("_%sx%s", w, h) + src.substring(inserTo, src.length());
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scale(src, dest, w, h);
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return dest;
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}
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/**
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* 图片大小压缩
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*
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* @param src
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* @throws IOException
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*/
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public static void scale(String src) throws IOException {
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File file = new File(src);
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if (!file.exists()) {
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return;
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}
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BufferedImage bufferedImage = ImageIO.read(file);
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int w = bufferedImage.getWidth();
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int h = bufferedImage.getHeight();
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String srcSuffix = src.substring(src.lastIndexOf(".") + 1);
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Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName(srcSuffix);
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ImageReader reader = (ImageReader) iterator.next();
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InputStream in = new FileInputStream(src);
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ImageInputStream iis = ImageIO.createImageInputStream(in);
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reader.setInput(iis);
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BufferedImage srcBuffered = readBuffereImage(reader, w, h);
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BufferedImage targetBuffered = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
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Graphics graphics = targetBuffered.getGraphics();
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graphics.drawImage(srcBuffered.getScaledInstance(w, h, Image.SCALE_DEFAULT), 0, 0, null); // 绘制缩小后的图
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graphics.dispose();
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srcBuffered.flush();
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in.close();
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iis.close();
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ImageIO.write(targetBuffered, srcSuffix, file);
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targetBuffered.flush();
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}
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/**
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* 等比缩放，居中剪切
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*
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* @param src
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* @param dest
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* @param w
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* @param h
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* @throws IOException
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*/
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public static void scale(String src, String dest, int w, int h) throws IOException {
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String srcSuffix = src.substring(src.lastIndexOf(".") + 1);
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Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName(srcSuffix);
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ImageReader reader = (ImageReader) iterator.next();
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InputStream in = new FileInputStream(src);
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ImageInputStream iis = ImageIO.createImageInputStream(in);
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reader.setInput(iis);
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BufferedImage srcBuffered = readBuffereImage(reader, w, h);
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BufferedImage targetBuffered = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
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Graphics graphics = targetBuffered.getGraphics();
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graphics.drawImage(srcBuffered.getScaledInstance(w, h, Image.SCALE_DEFAULT), 0, 0, null); // 绘制缩小后的图
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graphics.dispose();
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srcBuffered.flush();
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in.close();
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iis.close();
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ImageIO.write(targetBuffered, srcSuffix, new File(dest));
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targetBuffered.flush();
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}
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private static BufferedImage readBuffereImage(ImageReader reader, int w, int h) throws IOException {
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ImageReadParam param = reader.getDefaultReadParam();
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int srcWidth = reader.getWidth(0);
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int srcHeight = reader.getHeight(0);
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Rectangle rect = null;
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if ((float) w / h > (float) srcWidth / srcHeight) {
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h = h * srcWidth / w;
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w = srcWidth;
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rect = new Rectangle(0, (srcHeight - h) / 2, w, h);
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} else {
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w = w * srcHeight / h;
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h = srcHeight;
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rect = new Rectangle((srcWidth - w) / 2, 0, w, h);
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}
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param.setSourceRegion(rect);
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BufferedImage srcBuffered = reader.read(0, param);
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return srcBuffered;
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}
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public final static void pressImage(String watermarkImg, String srcImageFile) {
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pressImage(watermarkImg, srcImageFile, srcImageFile, 5, -1, -1, 0.2f, 1);
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}
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public final static void pressImage(String watermarkImg, String srcImageFile, String destImageFile) {
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pressImage(watermarkImg, srcImageFile, destImageFile, 5, -1, -1, 0.2f, 1);
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}
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public final static void pressImage(String watermarkImg, String srcImageFile, String destImageFile, int position,
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float alpha) {
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pressImage(watermarkImg, srcImageFile, destImageFile, position, -1, -1, 0.2f, alpha);
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}
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/**
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* @param watermarkImg
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* 水印图片位置
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* @param srcImageFile
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* 源图片位置
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* @param destImageFile
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* 生成的图片位置
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* @param position
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* 水印打印的位置： 1->左上角，2->右上角，1->居中，1->左下角，1->右下角
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* @param xOffset
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* x轴偏移量，xOffset小于0，自动偏移
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* @param yOffset
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* y轴偏移量，yOffset小于0，自动偏移
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* @param radio
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* 默认为原图的 1/4
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* @param alpha
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* 透明度（0~1），PNG图片建议设置为1
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*/
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public final static void pressImage(String watermarkImg, String srcImageFile, String destImageFile, int position,
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int xOffset, int yOffset, float radio, float alpha) {
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try {
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File img = new File(srcImageFile);
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Image src = ImageIO.read(img);
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int srcWidth = src.getWidth(null);
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int srcHeight = src.getHeight(null);
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BufferedImage image = new BufferedImage(srcWidth, srcHeight, BufferedImage.TYPE_INT_RGB);
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Graphics2D graphics = image.createGraphics();
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graphics.drawImage(src, 0, 0, srcWidth, srcHeight, null);
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// 水印文件
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Image wmImage = ImageIO.read(new File(watermarkImg));
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int wmWidth = wmImage.getWidth(null);
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int wmHeight = wmImage.getHeight(null);
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radio = radio <= 0 ? 0.2f : radio;
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int newWidth = (int) (srcWidth * radio);
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int newHeight = (int) (wmHeight * (newWidth / (float) wmWidth));
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xOffset = (xOffset < 0) ? (int) (newWidth * 0.1f) : xOffset;
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yOffset = (yOffset < 0) ? (int) (newHeight * 0.1f) : yOffset;
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int xPostion = 0;
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int yPostion = 0;
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switch (position) {
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case 1:
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xPostion = xOffset;
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yPostion = yOffset;
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break;
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case 2:
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xPostion = (int) (srcWidth * (1 - radio) - xOffset);
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yPostion = yOffset;
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break;
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case 3:
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xPostion = (int) (srcWidth - newWidth) / 2;
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yPostion = (int) (srcHeight - newHeight) / 2;
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break;
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case 4:
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xPostion = xOffset;
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yPostion = (int) (srcHeight - newHeight - yOffset);
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break;
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case 5:
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xPostion = (int) (srcWidth * (1 - radio) - xOffset);
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yPostion = (int) (srcHeight - newHeight - yOffset);
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break;
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default:
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xPostion = xOffset;
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yPostion = yOffset;
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break;
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}
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graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
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graphics.drawImage(wmImage, xPostion, yPostion, newWidth, newHeight, null);
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// 水印文件结束
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graphics.dispose();
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ImageIO.write((BufferedImage) image, "JPEG", new File(destImageFile));
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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