Mercurial > hg > digilib-old
annotate servlet/src/digilib/image/DocuImageImpl.java @ 464:f1f710ff14ad
Servlet version 1.10b
- JAIDocuImage loads Flashpix
- refactored image detection code into DocuImage
- DocuImage has new methods identify() and getSupportedFormats()
author | robcast |
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date | Mon, 13 Feb 2006 20:57:18 +0100 |
parents | 03ff7238c9d4 |
children | 11e11fe4d680 |
rev | line source |
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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 | |
85 | 23 import java.awt.Rectangle; |
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24 import java.io.File; |
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25 import java.io.IOException; |
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26 import java.io.RandomAccessFile; |
464 | 27 import java.util.Iterator; |
28 import java.util.LinkedList; | |
29 import java.util.List; | |
85 | 30 |
181 | 31 import org.apache.log4j.Logger; |
464 | 32 import org.marcoschmidt.image.ImageInfo; |
181 | 33 |
34 import digilib.io.FileOpException; | |
159 | 35 import digilib.io.ImageFile; |
1 | 36 |
73 | 37 /** Simple abstract implementation of the <code>DocuImage</code> interface. |
38 * | |
39 * This implementation provides basic functionality for the utility methods like | |
40 * <code>SetUtils</code>, and <code>getKnownFileTypes</code>. Image methods like | |
41 * <code>loadImage</code>, <code>writeImage</code>, <code>getWidth</code>, | |
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42 * <code>getHeight</code>, <code>crop</code> and <code>scale</code> must be |
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43 * implemented by derived classes. |
73 | 44 */ |
1 | 45 public abstract class DocuImageImpl implements DocuImage { |
46 | |
181 | 47 /** logger */ |
278 | 48 protected static Logger logger = Logger.getLogger(DocuImage.class); |
181 | 49 |
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50 /** Interpolation quality. */ |
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51 protected int quality = 0; |
85 | 52 |
86 | 53 /** epsilon for float comparisons. */ |
85 | 54 public final double epsilon = 1e-5; |
86 | 55 |
56 /** image mime-type */ | |
57 protected String mimeType = null; | |
1 | 58 |
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59 /** |
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60 * Returns the quality. |
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61 * @return int |
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62 */ |
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63 public int getQuality() { |
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64 return quality; |
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65 } |
1 | 66 |
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67 /** |
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68 * Sets the quality. |
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69 * @param quality The quality to set |
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70 */ |
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71 public void setQuality(int quality) { |
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72 this.quality = quality; |
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73 } |
1 | 74 |
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75 /** Check image size and type and store in ImageFile f */ |
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76 public boolean identify(ImageFile imgf) throws IOException { |
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77 // fileset to store the information |
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78 File f = imgf.getFile(); |
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79 if (f == null) { |
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80 throw new IOException("File not found!"); |
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81 } |
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82 RandomAccessFile raf = new RandomAccessFile(f, "r"); |
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83 // set up ImageInfo object |
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84 ImageInfo iif = new ImageInfo(); |
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85 iif.setInput(raf); |
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86 iif.setCollectComments(false); |
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87 iif.setDetermineImageNumber(false); |
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88 logger.debug("identifying (ImageInfo) " + f); |
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89 // try with ImageInfo first |
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90 if (iif.check()) { |
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91 ImageSize d = new ImageSize(iif.getWidth(), iif.getHeight()); |
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92 imgf.setSize(d); |
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93 imgf.setMimetype(iif.getMimeType()); |
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94 //logger.debug(" format:"+iif.getFormatName()); |
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95 raf.close(); |
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96 logger.debug("image size: " + imgf.getSize()); |
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97 return true; |
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98 } |
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99 return false; |
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100 } |
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101 |
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102 /** Crop and scale the current image. |
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103 * |
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104 * The current image is cropped to a rectangle of width, height at position |
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105 * x_off, y_off. The resulting image is scaled by the factor scale using the |
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106 * interpolation quality qual (0=worst). |
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107 * |
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108 * @param x_off X offset of the crop rectangle in pixel. |
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109 * @param y_off Y offset of the crop rectangle in pixel. |
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110 * @param width Width of the crop rectangle in pixel. |
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111 * @param height Height of the crop rectangle in pixel. |
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112 * @param scale Scaling factor. |
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113 * @param qual Interpolation quality (0=worst). |
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114 * @throws ImageOpException Exception thrown on any error. |
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115 */ |
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116 public void cropAndScale( |
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117 int x_off, int y_off, int width, int height, double scale, int qual) |
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118 throws ImageOpException { |
1 | 119 |
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120 setQuality(qual); |
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121 crop(x_off, y_off, width, height); |
149 | 122 scale(scale, scale); |
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123 } |
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124 |
86 | 125 public String getMimetype() { |
126 return mimeType; | |
127 } | |
128 | |
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129 public void rotate(double angle) throws ImageOpException { |
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130 // just a do-nothing implementation |
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131 } |
1 | 132 |
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133 public void mirror(double angle) throws ImageOpException { |
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134 // just a do-nothing implementation |
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135 } |
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136 |
86 | 137 public void enhance(float mult, float add) throws ImageOpException { |
85 | 138 // just a do-nothing implementation |
139 } | |
140 | |
141 public boolean isSubimageSupported() { | |
86 | 142 // partial loading not supported per default |
85 | 143 return false; |
144 } | |
145 | |
159 | 146 public void loadSubimage(ImageFile f, Rectangle region, int subsample) |
85 | 147 throws FileOpException { |
148 // empty implementation | |
149 } | |
150 | |
86 | 151 public void enhanceRGB(float[] rgbm, float[] rgba) |
152 throws ImageOpException { | |
153 // emtpy implementation | |
154 } | |
155 | |
207 | 156 public void dispose() { |
464 | 157 // emtpy implementation |
158 } | |
159 | |
160 public Iterator getSupportedFormats() { | |
161 List empty = new LinkedList(); | |
162 return empty.iterator(); | |
207 | 163 } |
164 | |
1 | 165 } |