Java tutorial
/** * OpenKM, Open Document Management System (http://www.openkm.com) * Copyright (c) 2006-2015 Paco Avila & Josep Llort * * No bytes were intentionally harmed during the development of this application. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ package com.openkm.util; import java.awt.Graphics; import java.awt.Point; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.HashMap; import javax.imageio.ImageIO; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.openkm.bean.ExecutionResult; import com.openkm.core.Config; import com.openkm.core.DatabaseException; import com.openkm.core.MimeTypeConfig; import de.schlichtherle.io.FileInputStream; import freemarker.template.TemplateException; /** * ImageUtil * * @author jllort * * @see http://www.thebuzzmedia.com/software/imgscalr-java-image-scaling-library/ * @see http://marvinproject.sourceforge.net/en/index.html */ public class ImageUtils { private static Logger log = LoggerFactory.getLogger(ImageUtils.class); /** * cloneImage */ public static BufferedImage clone(BufferedImage source) { BufferedImage img = new BufferedImage(source.getWidth(), source.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics g = img.getGraphics(); g.drawImage(source, 0, 0, null); g.dispose(); return img; } /** * pointWithinRange */ public static boolean pointWithinRange(Point p, BufferedImage img) { return !(p.x < 0 || p.y < 0 || p.x >= img.getWidth() || p.y >= img.getHeight()); } /** * crop */ public static byte[] crop(byte[] img, int x, int y, int width, int height) throws RuntimeException { log.debug("crop({}, {}, {}, {}, {})", new Object[] { img.length, x, y, width, height }); ByteArrayInputStream bais = new ByteArrayInputStream(img); byte[] imageInByte; try { BufferedImage image = ImageIO.read(bais); BufferedImage croppedImage = image.getSubimage(x, y, width, height); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write(croppedImage, "png", baos); baos.flush(); imageInByte = baos.toByteArray(); IOUtils.closeQuietly(baos); } catch (IOException e) { log.error(e.getMessage()); throw new RuntimeException("IOException: " + e.getMessage(), e); } finally { IOUtils.closeQuietly(bais); } log.debug("crop: {}", imageInByte.length); return imageInByte; } /** * Rotate an image. * * @param input Image to rotate. * @param output Image rotated. * @param angle Rotation angle. */ public static void rotate(File input, File output, double angle) throws RuntimeException { log.debug("rotate({}, {}, {})", new Object[] { input, output, angle }); String params = "-rotate " + angle + " ${fileIn} ${fileOut}"; ImageMagickConvert(input, output, params); } /** * Rotate an image. * * @param img Image to rotate. * @param angle Rotation angle. * @return the image rotated. */ public static byte[] rotate(byte[] img, double angle) throws RuntimeException { log.debug("rotate({}, {})", new Object[] { img.length, angle }); ByteArrayOutputStream baos = new ByteArrayOutputStream(); FileOutputStream fos = null; FileInputStream fis = null; byte[] ret = new byte[] {}; File tmpFileIn = null; try { // Save to disk tmpFileIn = FileUtils.createTempFileFromMime(MimeTypeConfig.MIME_PNG); fos = new FileOutputStream(tmpFileIn); IOUtils.write(img, fos); IOUtils.closeQuietly(fos); // Rotate rotate(tmpFileIn, tmpFileIn, angle); // Read from disk fis = new FileInputStream(tmpFileIn); IOUtils.copy(fis, baos); IOUtils.closeQuietly(fis); ret = baos.toByteArray(); } catch (DatabaseException e) { throw new RuntimeException(e.getMessage(), e); } catch (IOException e) { throw new RuntimeException(e.getMessage(), e); } finally { FileUtils.deleteQuietly(tmpFileIn); IOUtils.closeQuietly(baos); IOUtils.closeQuietly(fos); IOUtils.closeQuietly(fis); } log.debug("crop: {}", ret.length); return ret; } /** * Create image thumbnail. */ public static void createThumbnail(File input, String size, File output) throws RuntimeException { log.debug("createThumbnail({}, {}, {})", new Object[] { input, size, output }); String params = "-thumbnail " + size + " -background white -flatten ${fileIn} ${fileOut}"; ImageMagickConvert(input, output, params); } /** * Resize image. */ public static void resize(File input, String size, File output) throws RuntimeException { log.debug("resize({}, {}, {})", new Object[] { input, size, output }); String params = "-resize " + size + " ${fileIn} ${fileOut}"; ImageMagickConvert(input, output, params); } /** * Execute ImageMagick convert with parameters. */ public static void ImageMagickConvert(File input, File output, String params) { ImageMagickConvert(input.getPath(), output.getPath(), params); } /** * Execute ImageMagick convert with parameters. */ public static void ImageMagickConvert(String input, String output, String params) { log.debug("ImageMagickConvert({}, {}, {})", new Object[] { input, output, params }); String cmd = null; try { HashMap<String, Object> hm = new HashMap<String, Object>(); hm.put("fileIn", input); hm.put("fileOut", output); String tpl = Config.SYSTEM_IMAGEMAGICK_CONVERT + " " + params; cmd = TemplateUtils.replace("IMAGE_CONVERT", tpl, hm); ExecutionResult er = ExecutionUtils.runCmd(cmd); if (er.getExitValue() != 0) { throw new RuntimeException(er.getStderr()); } } catch (SecurityException e) { throw new RuntimeException("Security exception executing command: " + cmd, e); } catch (InterruptedException e) { throw new RuntimeException("Interrupted exception executing command: " + cmd, e); } catch (IOException e) { throw new RuntimeException("IO exception executing command: " + cmd, e); } catch (TemplateException e) { throw new RuntimeException("Template exception", e); } } }