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comparison servlet/src/digilib/image/JAIDocuImage.java @ 85:4e6757e8ccd4

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New enhanced ImageLoader stuff. Now uses Subsampling and image regions on read. Now implements enhance, rotate and mirror for ImageLoader/Java2D
author robcast
date Thu, 27 Feb 2003 15:07:29 +0100
parents 63c8186455c1
children 997ba69afb81
comparison
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84:ed1b698b4f0a 85:4e6757e8ccd4
1 /* JAIDocuImage -- Image class implementation using JAI (Java Advanced Imaging) 1 /* JAIDocuImage -- Image class implementation using JAI (Java Advanced Imaging)
2 2
3 Digital Image Library servlet components 3 Digital Image Library servlet components
4 4
5 Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de) 5 Copyright (C) 2001, 2002, 2003 Robert Casties (robcast@mail.berlios.de)
6 6
7 This program is free software; you can redistribute it and/or modify it 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 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 9 Free Software Foundation; either version 2 of the License, or (at your
10 option) any later version. 10 option) any later version.
37 /** A DocuImage implementation using Java Advanced Imaging Library. */ 37 /** A DocuImage implementation using Java Advanced Imaging Library. */
38 public class JAIDocuImage extends DocuImageImpl { 38 public class JAIDocuImage extends DocuImageImpl {
39 39
40 protected RenderedImage img; 40 protected RenderedImage img;
41 protected Interpolation interpol = null; 41 protected Interpolation interpol = null;
42
43 // epsilon for float comparisons
44 public final double epsilon = 1e-5;
45 42
46 /** Default constructor. */ 43 /** Default constructor. */
47 public JAIDocuImage() { 44 public JAIDocuImage() {
48 } 45 }
49 46
201 /* rotates the current image */ 198 /* rotates the current image */
202 public void rotate(double angle) throws ImageOpException { 199 public void rotate(double angle) throws ImageOpException {
203 RenderedImage rotImg; 200 RenderedImage rotImg;
204 // convert degrees to radians 201 // convert degrees to radians
205 double rangle = Math.toRadians(angle); 202 double rangle = Math.toRadians(angle);
206 // rotate about the image center 203 float x = getWidth()/2;
207 double xoff = img.getWidth() / 2; 204 float y = getHeight()/2;
208 double yoff = img.getHeight() / 2;
209 205
210 // optimize rotation by right angles 206 // optimize rotation by right angles
211 TransposeType rotOp = null; 207 TransposeType rotOp = null;
212 if (Math.abs(angle - 0) < epsilon) { 208 if (Math.abs(angle - 0) < epsilon) {
213 // 0 degree 209 // 0 degree
233 rotImg = JAI.create("transpose", pb); 229 rotImg = JAI.create("transpose", pb);
234 } else { 230 } else {
235 // setup "normal" rotation 231 // setup "normal" rotation
236 ParameterBlock param = new ParameterBlock(); 232 ParameterBlock param = new ParameterBlock();
237 param.addSource(img); 233 param.addSource(img);
238 param.add((float) xoff); 234 param.add(x);
239 param.add((float) yoff); 235 param.add(y);
240 param.add((float) rangle); 236 param.add((float) rangle);
241 param.add(interpol); 237 param.add(interpol);
242 // hint with border extender 238 // hint with border extender
243 RenderingHints hint = 239 RenderingHints hint =
244 new RenderingHints( 240 new RenderingHints(
249 } 245 }
250 246
251 util.dprintln( 247 util.dprintln(
252 3, 248 3,
253 "ROTATE: " 249 "ROTATE: "
254 + xoff 250 + x
255 + "," 251 + ","
256 + yoff 252 + y
257 + ", " 253 + ", "
258 + angle 254 + angle
259 + " (" 255 + " ("
260 + rangle 256 + rangle
261 + ")" 257 + ")"