Mercurial > hg > digilib-old
annotate servlet/src/digilib/image/DocuImageImpl.java @ 833:8ee72433bb8f stream
logs more request and response headers.
unsure about last-modified response.
author | robcast |
---|---|
date | Tue, 01 Mar 2011 10:14:29 +0100 |
parents | a630d0303cce |
children | 83e747b2a98f |
rev | line source |
---|---|
1 | 1 /* DocuImage -- General image interface class implementation |
2 | |
3 Digital Image Library servlet components | |
4 | |
85 | 5 Copyright (C) 2001, 2002, 2003 Robert Casties (robcast@mail.berlios.de) |
1 | 6 |
7 This program is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
9 Free Software Foundation; either version 2 of the License, or (at your | |
10 option) any later version. | |
11 | |
12 Please read license.txt for the full details. A copy of the GPL | |
13 may be found at http://www.gnu.org/copyleft/lgpl.html | |
14 | |
15 You should have received a copy of the GNU General Public License | |
16 along with this program; if not, write to the Free Software | |
73 | 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1 | 18 |
19 */ | |
20 | |
21 package digilib.image; | |
22 | |
533 | 23 import java.awt.Image; |
85 | 24 import java.awt.Rectangle; |
462
03ff7238c9d4
second try for flashpix support (doesn't work currently...)
robcast
parents:
278
diff
changeset
|
25 import java.io.IOException; |
533 | 26 import java.io.OutputStream; |
464 | 27 import java.util.Iterator; |
28 import java.util.LinkedList; | |
29 import java.util.List; | |
85 | 30 |
570 | 31 import javax.servlet.ServletException; |
32 | |
181 | 33 import org.apache.log4j.Logger; |
34 | |
35 import digilib.io.FileOpException; | |
566 | 36 import digilib.io.ImageInput; |
596 | 37 import digilib.util.ImageSize; |
1 | 38 |
73 | 39 /** Simple abstract implementation of the <code>DocuImage</code> interface. |
40 * | |
41 * This implementation provides basic functionality for the utility methods like | |
562 | 42 * <code>getKnownFileTypes</code>. Image methods like |
73 | 43 * <code>loadImage</code>, <code>writeImage</code>, <code>getWidth</code>, |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
44 * <code>getHeight</code>, <code>crop</code> and <code>scale</code> must be |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
45 * implemented by derived classes. |
73 | 46 */ |
1 | 47 public abstract class DocuImageImpl implements DocuImage { |
48 | |
181 | 49 /** logger */ |
469
11e11fe4d680
Improved performance of JAIDocuImage for large images
robcast
parents:
464
diff
changeset
|
50 protected static final Logger logger = Logger.getLogger(DocuImage.class); |
181 | 51 |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
52 /** Interpolation quality. */ |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
53 protected int quality = 0; |
85 | 54 |
86 | 55 /** epsilon for float comparisons. */ |
85 | 56 public final double epsilon = 1e-5; |
1 | 57 |
570 | 58 /** image size */ |
59 protected ImageSize imgSize = null; | |
60 | |
588 | 61 /** ImageInput that was read */ |
62 protected ImageInput input; | |
63 | |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
64 /** |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
65 * Returns the quality. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
66 * @return int |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
67 */ |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
68 public int getQuality() { |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
69 return quality; |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
70 } |
1 | 71 |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
72 /** |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
73 * Sets the quality. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
74 * @param quality The quality to set |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
75 */ |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
76 public void setQuality(int quality) { |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
77 this.quality = quality; |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
78 } |
1 | 79 |
564 | 80 /** Crop and scale the current image. |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
81 * |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
82 * The current image is cropped to a rectangle of width, height at position |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
83 * x_off, y_off. The resulting image is scaled by the factor scale using the |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
84 * interpolation quality qual (0=worst). |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
85 * |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
86 * @param x_off X offset of the crop rectangle in pixel. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
87 * @param y_off Y offset of the crop rectangle in pixel. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
88 * @param width Width of the crop rectangle in pixel. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
89 * @param height Height of the crop rectangle in pixel. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
90 * @param scale Scaling factor. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
91 * @param qual Interpolation quality (0=worst). |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
92 * @throws ImageOpException Exception thrown on any error. |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
93 */ |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
94 public void cropAndScale( |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
95 int x_off, int y_off, int width, int height, double scale, int qual) |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
96 throws ImageOpException { |
562 | 97 // default implementation: first crop, then scale |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
98 setQuality(qual); |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
99 crop(x_off, y_off, width, height); |
149 | 100 scale(scale, scale); |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
101 } |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
102 |
588 | 103 /* (non-Javadoc) |
104 * @see digilib.image.DocuImage#getMimetype() | |
105 */ | |
86 | 106 public String getMimetype() { |
588 | 107 if (input != null) { |
108 return input.getMimetype(); | |
109 } | |
110 return null; | |
86 | 111 } |
112 | |
564 | 113 /* (non-Javadoc) |
114 * @see digilib.image.DocuImage#identify(digilib.io.ImageFile) | |
115 */ | |
588 | 116 public ImageInput identify(ImageInput ii) throws IOException { |
564 | 117 // just a do-nothing implementation |
118 return null; | |
119 } | |
120 | |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
121 public void rotate(double angle) throws ImageOpException { |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
122 // just a do-nothing implementation |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
123 } |
1 | 124 |
79
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
125 public void mirror(double angle) throws ImageOpException { |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
126 // just a do-nothing implementation |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
127 } |
63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
|
128 |
86 | 129 public void enhance(float mult, float add) throws ImageOpException { |
85 | 130 // just a do-nothing implementation |
131 } | |
132 | |
133 public boolean isSubimageSupported() { | |
86 | 134 // partial loading not supported per default |
85 | 135 return false; |
136 } | |
137 | |
588 | 138 public void loadSubimage(ImageInput ii, Rectangle region, int subsample) |
85 | 139 throws FileOpException { |
140 // empty implementation | |
141 } | |
142 | |
86 | 143 public void enhanceRGB(float[] rgbm, float[] rgba) |
144 throws ImageOpException { | |
145 // emtpy implementation | |
146 } | |
147 | |
829 | 148 public void colorOp(ColorOp op) throws ImageOpException { |
149 // emtpy implementation | |
150 } | |
151 | |
207 | 152 public void dispose() { |
464 | 153 // emtpy implementation |
154 } | |
155 | |
531 | 156 public Iterator<String> getSupportedFormats() { |
157 List<String> empty = new LinkedList<String>(); | |
464 | 158 return empty.iterator(); |
207 | 159 } |
533 | 160 |
161 public void crop(int xoff, int yoff, int width, int height) | |
162 throws ImageOpException { | |
819
a23c4c15a6a8
clean up possible resource leaks. better behaviour with unknown image types.
robcast
parents:
596
diff
changeset
|
163 // emtpy implementation |
533 | 164 } |
165 | |
166 public Image getAwtImage() { | |
819
a23c4c15a6a8
clean up possible resource leaks. better behaviour with unknown image types.
robcast
parents:
596
diff
changeset
|
167 // emtpy implementation |
533 | 168 return null; |
169 } | |
170 | |
171 public int getHeight() { | |
570 | 172 ImageSize is = getSize(); |
173 if (is != null) { | |
174 return is.getHeight(); | |
175 } | |
533 | 176 return 0; |
177 } | |
207 | 178 |
533 | 179 public int getWidth() { |
570 | 180 ImageSize is = getSize(); |
181 if (is != null) { | |
182 return is.getWidth(); | |
183 } | |
533 | 184 return 0; |
185 } | |
186 | |
570 | 187 public ImageSize getSize() { |
188 return imgSize; | |
189 } | |
190 | |
588 | 191 public abstract void loadImage(ImageInput ii) throws FileOpException; |
533 | 192 |
588 | 193 public abstract void scale(double scaleX, double scaleY) throws ImageOpException; |
533 | 194 |
588 | 195 public abstract void writeImage(String mt, OutputStream ostream) |
196 throws ServletException, ImageOpException; | |
829 | 197 |
533 | 198 |
1 | 199 } |