1 /*
2 * Copyright (c) 2002-2021, City of Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.plugins.stock.utils;
35
36 import java.awt.image.BufferedImage;
37 import java.io.File;
38 import java.io.IOException;
39
40 import javax.imageio.ImageIO;
41
42 import org.apache.log4j.Logger;
43 import org.imgscalr.Scalr;
44
45 /**
46 * Class for manipulating images
47 *
48 * @author abataille
49 */
50 public final class ImageUtils
51 {
52 private static final String PARAMETER_JPG = "jpg";
53 private static final Logger LOGGER = Logger.getLogger( ImageUtils.class );
54
55 /**
56 *
57 * Creates a new ImageUtils.java object.
58 */
59 private ImageUtils( )
60 {
61
62 }
63
64 /**
65 * Create a thumbnail and write it into a new file prefixed by tb_ (images/lutece.jpg => images/lutece_tb.jpg)
66 *
67 * @param fImage
68 * source image file
69 * @param width
70 * max width of the thumbnail
71 * @param height
72 * the height
73 * @throws IOException
74 * Signals that an I/O exception has occurred.
75 */
76 public static File createThumbnail( File fImage, int width, int height ) throws IOException
77 {
78 File fThumb = resizeImage( fImage, width, height, "tb_" + fImage.getName( ) );
79
80 LOGGER.debug( "Thumbnail créé " + fThumb.getAbsolutePath( ) );
81 return fThumb;
82 }
83
84 /**
85 *
86 * @param fImage
87 * source image file
88 * @param width
89 * the max width for the image
90 * @param height
91 * the max height for the image
92 * @param newName
93 * the new name for the image, can be null to keep old name
94 * @return the image with limit dimensions
95 * @throws IOException
96 * Signals that an I/O exception has occurred.
97 */
98 public static File resizeImage( File fImage, int maxWidth, int maxHeight, String newName ) throws IOException
99 {
100 BufferedImage image = ImageIO.read( fImage );
101 BufferedImage resizedImage;
102
103 if ( image.getWidth( ) > maxWidth || image.getHeight( ) > maxHeight )
104 {
105 resizedImage = Scalr.resize( image, Scalr.Mode.AUTOMATIC, maxWidth, maxHeight );
106 }
107 else
108 {
109 LOGGER.debug( "Image " + fImage.getName( ) + " non redimensionnée car déjà plus petite que " + maxWidth + "x" + maxHeight );
110 resizedImage = image;
111 }
112
113 File fResized = new File( fImage.getParent( ), newName != null ? newName : fImage.getName( ) );
114 ImageIO.write( resizedImage, PARAMETER_JPG, fResized );
115
116 return fResized;
117 }
118 }