|
1 package info.magnolia.module.admininterface.dialogpages;
2
3 import info.magnolia.cms.core.HierarchyManager;
4 import info.magnolia.cms.core.NodeData;
5 import info.magnolia.cms.security.SessionAccessControl;
6
7 import java.awt.Graphics2D  ;
8 import java.awt.Image ;
9 import java.awt.image.BufferedImage ;
10 import java.io.BufferedOutputStream ;
11 import java.io.IOException ;
12 import java.io.InputStream ;
13
14 import javax.imageio.ImageIO ;
15 import javax.servlet.ServletOutputStream ;
16 import javax.servlet.http.HttpServlet ;
17 import javax.servlet.http.HttpServletRequest ;
18 import javax.servlet.http.HttpServletResponse ;
19
20 import org.apache.log4j.Logger;
21
22 import com.sun.image.codec.jpeg.JPEGCodec;
23 import com.sun.image.codec.jpeg.JPEGEncodeParam;
24 import com.sun.image.codec.jpeg.JPEGImageEncoder;
25
26
27
31 public class FileThumbnailDialogPage extends HttpServlet {
32
33
36 private static final long serialVersionUID = 222L;
37
38
41 private static Logger log = Logger.getLogger(FileThumbnailDialogPage.class);
42
43
46 public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
47 response.setContentType("image/jpeg");
49 String src = request.getParameter("src"); String size = request.getParameter("size");
52 HierarchyManager hm = SessionAccessControl.getHierarchyManager(request);
53
54 InputStream in = null;
55
56 NodeData data;
57 try {
58 data = hm.getNodeData(src);
59 in = data.getValue().getStream();
60 }
61 catch (Exception e) {
62 log.error(e.getMessage(), e);
63 return;
64 }
65
66 Image image = ImageIO.read(in);
67
68 int thumbHeight;
69 int thumbWidth;
70 if (size != null) {
71 thumbHeight = image.getHeight(null);
72 thumbWidth = image.getWidth(null);
73 }
74 else {
75 thumbWidth = 150;
76 int w = image.getWidth(null);
77 int h = image.getHeight(null);
78 if (w == 0) {
79 w = 1;
80 }
81 if (h == 0) {
82 h = 1;
83 }
84
85 if (w > thumbWidth) {
86 thumbHeight = thumbWidth * h / w;
87 }
88 else {
89 thumbWidth = w;
90 thumbHeight = h;
91 }
92
93 if (thumbHeight > 120) {
94 thumbHeight = 100;
95 thumbWidth = thumbHeight * w / h;
96 }
97
98 }
99
100 BufferedImage thumbImage = new BufferedImage (thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
102 Graphics2D graphics2D = thumbImage.createGraphics();
103 graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);
105
106 ServletOutputStream sout = response.getOutputStream();
107 BufferedOutputStream output = new BufferedOutputStream (sout);
108 JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(output);
109 JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbImage);
110 param.setQuality(0.8f, false);
111
112 encoder.setJPEGEncodeParam(param);
113 encoder.encode(thumbImage);
114
115 }
116
117 }
118 |
Popular Tags |
Java API By Example, From Geeks To Geeks.