Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 149:04ad64b2137a
Servlet version 1.14b1
- better performance with thumbnails (really, this time :-)
- new DocuInfo class
- new Directory class
- DocuFile uses String and Directory as data members
- parameter rearrangements
| author | robcast |
|---|---|
| date | Tue, 26 Aug 2003 22:28:43 +0200 |
| parents | 837a633a0407 |
| children | bc8df0133c04 |
| rev | line source |
|---|---|
| 1 | 1 /* Scaler -- Scaler servlet main class |
| 2 | |
| 3 Digital Image Library servlet components | |
| 4 | |
| 73 | 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 | |
| 149 | 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 1 | 18 |
| 19 */ | |
| 20 | |
| 21 package digilib.servlet; | |
| 22 | |
|
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23 import java.awt.geom.AffineTransform; |
| 100 | 24 import java.awt.geom.NoninvertibleTransformException; |
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25 import java.awt.geom.Rectangle2D; |
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26 import java.io.File; |
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27 import java.io.IOException; |
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28 import java.util.List; |
| 1 | 29 |
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30 import javax.servlet.ServletConfig; |
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31 import javax.servlet.ServletContext; |
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32 import javax.servlet.ServletException; |
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33 import javax.servlet.http.HttpServlet; |
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34 import javax.servlet.http.HttpServletRequest; |
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35 import javax.servlet.http.HttpServletResponse; |
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36 |
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37 import digilib.Utils; |
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38 import digilib.auth.AuthOpException; |
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39 import digilib.auth.AuthOps; |
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40 import digilib.image.DocuImage; |
| 122 | 41 import digilib.image.DocuInfo; |
| 149 | 42 import digilib.image.ImageLoaderImageInfoDocuInfo; |
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43 import digilib.image.ImageOpException; |
| 149 | 44 import digilib.image.ImageSize; |
| 86 | 45 import digilib.io.DocuDirCache; |
| 46 import digilib.io.DocuFile; | |
| 47 import digilib.io.DocuFileset; | |
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48 import digilib.io.FileOpException; |
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49 import digilib.io.FileOps; |
| 1 | 50 |
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51 //import tilecachetool.*; |
| 1 | 52 |
| 73 | 53 /** |
| 54 * @author casties | |
| 55 * | |
| 56 */ | |
| 1 | 57 //public class Scaler extends HttpServlet implements SingleThreadModel { |
| 58 public class Scaler extends HttpServlet { | |
| 59 | |
| 73 | 60 // digilib servlet version (for all components) |
| 149 | 61 public static final String dlVersion = "1.14b1"; |
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62 |
| 73 | 63 // Utils instance with debuglevel |
| 64 Utils util; | |
| 65 // FileOps instance | |
| 66 FileOps fileOp; | |
| 67 // AuthOps instance | |
| 68 AuthOps authOp; | |
| 69 // ServletOps instance | |
| 70 ServletOps servletOp; | |
| 86 | 71 // DocuDirCache instance |
| 72 DocuDirCache dirCache; | |
| 1 | 73 |
| 94 | 74 // DigilibConfiguration instance |
| 73 | 75 DigilibConfiguration dlConfig; |
| 1 | 76 |
| 73 | 77 // use authorization database |
| 78 boolean useAuthentication = true; | |
| 1 | 79 |
| 100 | 80 // EXPRIMENTAL |
| 81 // try to enlarge cropping area for "oblique" angles | |
| 82 boolean wholeRotArea = false; | |
| 83 | |
| 73 | 84 /** Initialisation on first run. |
| 85 * | |
| 86 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
| 87 */ | |
| 88 public void init(ServletConfig config) throws ServletException { | |
| 89 super.init(config); | |
| 1 | 90 |
| 73 | 91 // Debuggin! |
| 92 //TCTool tctool = new TCTool(); | |
| 147 | 93 System.out.println( |
| 94 "***** Digital Image Library Servlet (version " | |
| 95 + dlVersion | |
| 96 + ") *****"); | |
| 1 | 97 |
| 73 | 98 // get our ServletContext |
| 99 ServletContext context = config.getServletContext(); | |
| 100 // see if there is a Configuration instance | |
| 101 dlConfig = | |
| 102 (DigilibConfiguration) context.getAttribute( | |
| 86 | 103 "digilib.servlet.configuration"); |
| 73 | 104 if (dlConfig == null) { |
| 105 // create new Configuration | |
| 106 try { | |
| 107 dlConfig = new DigilibConfiguration(config); | |
| 86 | 108 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 109 } catch (Exception e) { |
| 110 throw new ServletException(e); | |
| 111 } | |
| 112 } | |
| 113 // set the servlet version | |
| 114 dlConfig.setServletVersion(dlVersion); | |
| 115 // first we need an Utils | |
| 116 util = dlConfig.getUtil(); | |
| 117 // set our AuthOps | |
| 118 useAuthentication = dlConfig.isUseAuthentication(); | |
| 119 authOp = dlConfig.getAuthOp(); | |
| 120 // FileOps instance | |
| 121 fileOp = new FileOps(util); | |
| 122 // AuthOps instance | |
| 123 servletOp = new ServletOps(util); | |
| 86 | 124 // DocuDirCache instance |
| 125 dirCache = dlConfig.getDirCache(); | |
| 73 | 126 } |
| 1 | 127 |
| 73 | 128 /** Process the HTTP Get request*/ |
| 129 public void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 130 throws ServletException, IOException { | |
| 131 util.dprintln(1, "The servlet has received a GET!"); | |
| 132 // create new request with defaults | |
| 133 DigilibRequest dlReq = new DigilibRequest(); | |
| 134 // set with request parameters | |
| 135 dlReq.setWithRequest(request); | |
| 136 // add DigilibRequest to ServletRequest | |
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137 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 138 // do the processing |
| 139 processRequest(request, response); | |
| 140 } | |
| 1 | 141 |
| 73 | 142 /**Process the HTTP Post request*/ |
| 143 public void doPost( | |
| 144 HttpServletRequest request, | |
| 145 HttpServletResponse response) | |
| 146 throws ServletException, IOException { | |
| 147 util.dprintln(1, "The servlet has received a POST!"); | |
| 148 // create new request with defaults | |
| 149 DigilibRequest dlReq = new DigilibRequest(); | |
| 150 // set with request parameters | |
| 151 dlReq.setWithRequest(request); | |
| 152 // add DigilibRequest to ServletRequest | |
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153 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 154 // do the processing |
| 155 processRequest(request, response); | |
| 156 } | |
| 157 | |
| 158 /** main request handler. */ | |
| 159 void processRequest( | |
| 160 HttpServletRequest request, | |
| 161 HttpServletResponse response) | |
| 162 throws ServletException, IOException { | |
| 1 | 163 |
| 73 | 164 // time for benchmarking |
| 165 long startTime = System.currentTimeMillis(); | |
| 166 // output mime/type | |
| 167 String mimeType = "image/png"; | |
| 1 | 168 |
| 73 | 169 /* |
| 170 * parameters for a session | |
| 171 */ | |
| 1 | 172 |
| 73 | 173 // scale the image file to fit window size i.e. respect dw,dh |
| 174 boolean scaleToFit = true; | |
| 100 | 175 // scale the image by a fixed factor only |
| 176 boolean absoluteScale = false; | |
| 122 | 177 // only crop the image to fit |
| 178 boolean cropToFit = false; | |
| 149 | 179 // send the file as is |
| 180 boolean sendFile = false; | |
| 181 // use low resolution images only | |
| 182 boolean loresOnly = false; | |
| 183 // use hires images only | |
| 122 | 184 boolean hiresOnly = false; |
| 73 | 185 // interpolation to use for scaling |
| 142 | 186 int scaleQual = 1; |
| 73 | 187 // send html error message (or image file) |
| 188 boolean errorMsgHtml = false; | |
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189 // mirror the image |
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190 boolean doMirror = false; |
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191 // angle of mirror axis |
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192 double mirrorAngle = 0; |
| 130 | 193 // original (hires) image resolution |
| 194 double origResX = 0; | |
| 195 double origResY = 0; | |
| 1 | 196 |
| 73 | 197 /* |
| 198 * request parameters | |
| 199 */ | |
| 200 | |
| 201 DigilibRequest dlRequest = | |
| 202 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 203 |
| 73 | 204 // destination image width |
| 205 int paramDW = dlRequest.getDw(); | |
| 206 // destination image height | |
| 207 int paramDH = dlRequest.getDh(); | |
| 122 | 208 // dw and dh shouldn't be empty, if they are, set dw=dh |
| 209 if (paramDW <= 0) { | |
| 210 paramDW = paramDH; | |
| 211 } | |
| 212 if (paramDH <= 0) { | |
| 213 paramDH = paramDW; | |
| 214 } | |
| 73 | 215 // relative area x_offset (0..1) |
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216 double paramWX = dlRequest.getWx(); |
| 73 | 217 // relative area y_offset |
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218 double paramWY = dlRequest.getWy(); |
| 73 | 219 // relative area width (0..1) |
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220 double paramWW = dlRequest.getWw(); |
| 73 | 221 // relative area height |
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222 double paramWH = dlRequest.getWh(); |
| 73 | 223 // scale factor (additional to dw/width, dh/height) |
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224 double paramWS = dlRequest.getWs(); |
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225 // rotation angle |
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226 double paramROT = dlRequest.getRot(); |
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227 // contrast enhancement |
| 86 | 228 float paramCONT = dlRequest.getCont(); |
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229 // brightness enhancement |
| 86 | 230 float paramBRGT = dlRequest.getBrgt(); |
| 231 // color modification | |
| 232 float[] paramRGBM = dlRequest.getRgbm(); | |
| 233 float[] paramRGBA = dlRequest.getRgba(); | |
| 130 | 234 // destination resolution (DPI) |
| 235 float paramDDPIX = dlRequest.getDdpix(); | |
| 236 float paramDDPIY = dlRequest.getDdpiy(); | |
| 237 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
| 238 // if X or Y resolution isn't set, use DDPI | |
| 239 paramDDPIX = dlRequest.getDdpi(); | |
| 240 paramDDPIY = dlRequest.getDdpi(); | |
| 241 } | |
| 1 | 242 |
| 73 | 243 /* operation mode: "fit": always fit to page, |
| 244 * "clip": send original resolution cropped, "file": send whole file (if | |
| 245 * allowed) | |
| 246 */ | |
| 247 if (dlRequest.isOption("clip")) { | |
| 248 scaleToFit = false; | |
| 100 | 249 absoluteScale = false; |
| 73 | 250 cropToFit = true; |
| 149 | 251 sendFile = false; |
| 252 hiresOnly = true; | |
| 73 | 253 } else if (dlRequest.isOption("fit")) { |
| 254 scaleToFit = true; | |
| 100 | 255 absoluteScale = false; |
| 122 | 256 cropToFit = false; |
| 149 | 257 sendFile = false; |
| 258 hiresOnly = false; | |
| 130 | 259 } else if (dlRequest.isOption("osize")) { |
| 100 | 260 scaleToFit = false; |
| 261 absoluteScale = true; | |
| 122 | 262 cropToFit = false; |
| 149 | 263 sendFile = false; |
| 122 | 264 hiresOnly = true; |
| 73 | 265 } else if (dlRequest.isOption("file")) { |
| 266 scaleToFit = false; | |
| 100 | 267 absoluteScale = false; |
| 73 | 268 if (dlConfig.isSendFileAllowed()) { |
| 269 cropToFit = false; | |
| 149 | 270 sendFile = true; |
| 73 | 271 } else { |
| 122 | 272 // crop to fit if send file not allowed |
| 73 | 273 cropToFit = true; |
| 149 | 274 sendFile = false; |
| 73 | 275 } |
| 122 | 276 hiresOnly = true; |
| 73 | 277 } |
| 149 | 278 // operation mode: "lores": try to use scaled image, "hires": use unscaled image |
| 279 // "autores": try best fitting resolution | |
| 280 if (dlRequest.isOption("lores")) { | |
| 281 loresOnly = true; | |
| 282 hiresOnly = false; | |
| 283 } else if (dlRequest.isOption("hires")) { | |
| 284 loresOnly = false; | |
| 285 hiresOnly = true; | |
| 286 } else if (dlRequest.isOption("autores")) { | |
| 287 loresOnly = false; | |
| 288 hiresOnly = false; | |
| 289 } | |
| 73 | 290 // operation mode: "errtxt": error message in html, "errimg": error image |
| 291 if (dlRequest.isOption("errtxt")) { | |
| 292 errorMsgHtml = true; | |
| 293 } else if (dlRequest.isOption("errimg")) { | |
| 294 errorMsgHtml = false; | |
| 295 } | |
| 296 // operation mode: "q0" - "q2": interpolation quality | |
| 297 if (dlRequest.isOption("q0")) { | |
| 298 scaleQual = 0; | |
| 299 } else if (dlRequest.isOption("q1")) { | |
| 300 scaleQual = 1; | |
| 301 } else if (dlRequest.isOption("q2")) { | |
| 302 scaleQual = 2; | |
| 303 } | |
| 1 | 304 |
| 73 | 305 //"big" try for all file/image actions |
| 306 try { | |
| 307 | |
| 149 | 308 // DocuFileset of the image to load |
| 309 DocuFileset fileset = null; | |
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310 |
| 122 | 311 // new DocuInfo instance |
| 149 | 312 DocuInfo docuInfo = new ImageLoaderImageInfoDocuInfo(); |
| 73 | 313 |
| 314 /* | |
| 315 * find the file to load/send | |
| 316 */ | |
| 1 | 317 |
| 73 | 318 // get PathInfo |
| 319 String loadPathName = dlRequest.getFilePath(); | |
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320 |
| 73 | 321 /* |
| 322 * check permissions | |
| 323 */ | |
| 324 if (useAuthentication) { | |
| 325 // get a list of required roles (empty if no restrictions) | |
| 326 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 327 if (rolesRequired != null) { | |
| 328 util.dprintln(1, "Role required: " + rolesRequired); | |
| 329 util.dprintln(2, "User: " + request.getRemoteUser()); | |
| 330 // is the current request/user authorized? | |
| 331 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 332 // send deny answer and abort | |
| 333 util.dprintln(1, "ERROR: access denied!"); | |
| 334 if (errorMsgHtml) { | |
| 335 ServletOps.htmlMessage( | |
| 336 "ERROR: Unauthorized access!", | |
| 337 response); | |
| 338 } else { | |
| 339 servletOp.sendFile( | |
| 340 new File(dlConfig.getDenyImgFileName()), | |
| 341 response); | |
| 342 } | |
| 343 return; | |
| 344 } | |
| 345 } | |
| 346 } | |
| 1 | 347 |
| 122 | 348 // find the file(set) |
| 86 | 349 DocuFile fileToLoad; |
| 149 | 350 fileset = dirCache.getFileset(loadPathName, dlRequest.getPn()); |
| 94 | 351 if (fileset == null) { |
| 352 throw new FileOpException( | |
| 353 "File " | |
| 354 + loadPathName | |
| 355 + "(" | |
| 356 + dlRequest.getPn() | |
| 357 + ") not found."); | |
| 358 } | |
| 359 | |
| 122 | 360 /* |
| 361 * calculate expected source image size | |
| 362 * | |
| 363 */ | |
| 149 | 364 ImageSize expectedSourceSize = new ImageSize(); |
| 122 | 365 if (scaleToFit) { |
| 366 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 149 | 367 expectedSourceSize.setSize( |
| 368 (int) (paramDW * scale), | |
| 369 (int) (paramDH * scale)); | |
| 122 | 370 } else { |
| 371 expectedSourceSize.setSize( | |
| 149 | 372 (int) (paramDW * paramWS), |
| 373 (int) (paramDH * paramWS)); | |
| 100 | 374 } |
| 375 | |
| 122 | 376 /* |
| 377 * select a resolution | |
| 378 */ | |
| 149 | 379 if (hiresOnly) { |
| 380 // get first element (= highest resolution) | |
| 381 fileToLoad = fileset.get(0); | |
| 382 } else if (loresOnly) { | |
| 383 // enforced lores uses next smaller resolution | |
| 384 fileToLoad = | |
| 385 fileset.getNextSmaller(expectedSourceSize, docuInfo); | |
| 386 if (fileToLoad == null) { | |
| 387 // this is the smallest we have | |
| 388 fileToLoad = fileset.get(fileset.size() - 1); | |
| 389 } | |
| 390 } else { | |
| 130 | 391 // autores: use next higher resolution |
| 122 | 392 fileToLoad = |
| 393 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 394 if (fileToLoad == null) { | |
| 130 | 395 // this is the highest we have |
| 122 | 396 fileToLoad = fileset.get(0); |
| 397 } | |
| 86 | 398 } |
| 399 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 400 |
| 130 | 401 if (absoluteScale) { |
| 402 // get original resolution from metadata | |
| 403 fileset.checkMeta(); | |
| 404 origResX = fileset.getResX(); | |
| 405 origResY = fileset.getResY(); | |
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406 if ((origResX == 0) || (origResY == 0)) { |
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407 throw new ImageOpException("Missing image DPI information!"); |
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408 } |
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409 |
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410 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
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411 throw new ImageOpException("Missing display DPI information!"); |
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412 } |
| 130 | 413 } |
| 414 | |
| 86 | 415 // check the source image |
| 122 | 416 if (!fileToLoad.isChecked()) { |
| 149 | 417 docuInfo.checkFile(fileToLoad); |
| 122 | 418 } |
| 86 | 419 // get the source image type |
| 420 mimeType = fileToLoad.getMimetype(); | |
| 149 | 421 // get the source image size |
| 422 ImageSize imgSize = fileToLoad.getSize(); | |
| 423 | |
| 130 | 424 // decide if the image can be sent as is |
| 425 boolean mimetypeSendable = | |
| 122 | 426 mimeType.equals("image/jpeg") |
| 427 || mimeType.equals("image/png") | |
| 428 || mimeType.equals("image/gif"); | |
| 130 | 429 boolean imagoOptions = |
| 430 dlRequest.isOption("hmir") | |
| 431 || dlRequest.isOption("vmir") | |
| 432 || (paramROT != 0) | |
| 433 || (paramRGBM != null) | |
| 434 || (paramRGBA != null) | |
| 435 || (paramCONT != 0) | |
| 436 || (paramBRGT != 0); | |
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437 boolean imageSendable = mimetypeSendable && !imagoOptions; |
| 73 | 438 |
| 122 | 439 /* if not autoRes and image smaller than requested |
| 147 | 440 * size then send as is. |
| 441 * if autoRes and image has requested size then send as is. | |
| 100 | 442 * if not autoScale and not scaleToFit nor cropToFit |
| 122 | 443 * then send as is (mo=file) |
| 73 | 444 */ |
| 149 | 445 if ((loresOnly |
| 122 | 446 && imageSendable |
| 149 | 447 && fileToLoad.getSize().isSmallerThan(expectedSourceSize)) |
| 448 || (!(loresOnly || hiresOnly) && fileToLoad.getSize().fitsIn(expectedSourceSize)) | |
| 449 || sendFile) { | |
| 73 | 450 |
| 451 util.dprintln(1, "Sending File as is."); | |
| 1 | 452 |
| 86 | 453 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 454 |
| 73 | 455 util.dprintln( |
| 456 1, | |
| 457 "Done in " | |
| 458 + (System.currentTimeMillis() - startTime) | |
| 459 + "ms"); | |
| 460 return; | |
| 461 } | |
| 1 | 462 |
| 149 | 463 // new DocuImage instance |
| 464 DocuImage docuImage = dlConfig.getDocuImageInstance(); | |
| 465 if (docuImage == null) { | |
| 466 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 467 } | |
| 468 | |
| 469 // set interpolation quality | |
| 470 docuImage.setQuality(scaleQual); | |
| 471 | |
| 73 | 472 /* |
| 473 * crop and scale the image | |
| 474 */ | |
| 1 | 475 |
| 149 | 476 util.dprintln( |
| 477 2, | |
| 478 "IMG: " + imgSize.getWidth() + "x" + imgSize.getHeight()); | |
| 73 | 479 util.dprintln( |
| 480 2, | |
| 481 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 482 |
| 73 | 483 // coordinates and scaling |
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484 double areaXoff; |
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485 double areaYoff; |
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486 double areaWidth; |
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487 double areaHeight; |
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488 double scaleX; |
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489 double scaleY; |
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490 double scaleXY; |
| 1 | 491 |
| 100 | 492 // coordinates using Java2D |
| 493 // image size in pixels | |
| 494 Rectangle2D imgBounds = | |
| 149 | 495 new Rectangle2D.Double( |
| 496 0, | |
| 497 0, | |
| 498 imgSize.getWidth(), | |
| 499 imgSize.getHeight()); | |
| 100 | 500 // user window area in [0,1] coordinates |
| 501 Rectangle2D relUserArea = | |
| 502 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 503 // transform from relative [0,1] to image coordinates. | |
| 504 AffineTransform imgTrafo = | |
| 149 | 505 AffineTransform.getScaleInstance( |
| 506 imgSize.getWidth(), | |
| 507 imgSize.getHeight()); | |
| 85 | 508 // transform user coordinate area to image coordinate area |
| 100 | 509 Rectangle2D userImgArea = |
| 510 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 511 | |
| 512 // calculate scaling factors based on inner user area | |
| 73 | 513 if (scaleToFit) { |
| 100 | 514 areaWidth = userImgArea.getWidth(); |
| 515 areaHeight = userImgArea.getHeight(); | |
| 73 | 516 scaleX = paramDW / areaWidth * paramWS; |
| 517 scaleY = paramDH / areaHeight * paramWS; | |
| 518 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 519 } else if (absoluteScale) { |
| 520 // absolute scale | |
| 130 | 521 scaleX = paramDDPIX / origResX; |
| 522 scaleY = paramDDPIY / origResY; | |
| 523 // currently only same scale :-( | |
| 524 scaleXY = scaleX; | |
| 525 areaWidth = paramDW / scaleXY * paramWS; | |
| 526 areaHeight = paramDH / scaleXY * paramWS; | |
| 100 | 527 // reset user area size |
| 528 userImgArea.setRect( | |
| 529 userImgArea.getX(), | |
| 530 userImgArea.getY(), | |
| 531 areaWidth, | |
| 532 areaHeight); | |
| 73 | 533 } else { |
| 534 // crop to fit | |
| 85 | 535 areaWidth = paramDW * paramWS; |
| 536 areaHeight = paramDH * paramWS; | |
| 100 | 537 // reset user area size |
| 538 userImgArea.setRect( | |
| 539 userImgArea.getX(), | |
| 540 userImgArea.getY(), | |
| 541 areaWidth, | |
| 542 areaHeight); | |
| 73 | 543 scaleX = 1f; |
| 544 scaleY = 1f; | |
| 545 scaleXY = 1f; | |
| 100 | 546 } |
| 85 | 547 |
| 100 | 548 // enlarge image area for rotations to cover additional pixels |
| 549 Rectangle2D outerUserImgArea = userImgArea; | |
| 550 Rectangle2D innerUserImgArea = userImgArea; | |
| 551 if (wholeRotArea) { | |
| 552 if (paramROT != 0) { | |
| 553 try { | |
| 554 // rotate user area coordinates around center of user area | |
| 555 AffineTransform rotTrafo = | |
| 556 AffineTransform.getRotateInstance( | |
| 557 Math.toRadians(paramROT), | |
| 558 userImgArea.getCenterX(), | |
| 559 userImgArea.getCenterY()); | |
| 560 // get bounds from rotated end position | |
| 561 innerUserImgArea = | |
| 562 rotTrafo | |
| 563 .createTransformedShape(userImgArea) | |
| 564 .getBounds2D(); | |
| 565 // get bounds from back-rotated bounds | |
| 566 outerUserImgArea = | |
| 567 rotTrafo | |
| 568 .createInverse() | |
| 569 .createTransformedShape(innerUserImgArea) | |
| 570 .getBounds2D(); | |
| 571 } catch (NoninvertibleTransformException e1) { | |
| 572 // this shouldn't happen anyway | |
| 573 e1.printStackTrace(); | |
| 574 } | |
| 575 } | |
| 73 | 576 } |
| 1 | 577 |
| 73 | 578 util.dprintln( |
| 579 1, | |
| 580 "Scale " | |
| 581 + scaleXY | |
| 582 + "(" | |
| 583 + scaleX | |
| 584 + "," | |
| 585 + scaleY | |
| 586 + ") on " | |
| 100 | 587 + outerUserImgArea); |
| 1 | 588 |
| 73 | 589 // clip area at the image border |
| 100 | 590 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
| 85 | 591 |
| 100 | 592 areaWidth = outerUserImgArea.getWidth(); |
| 593 areaHeight = outerUserImgArea.getHeight(); | |
| 594 areaXoff = outerUserImgArea.getX(); | |
| 595 areaYoff = outerUserImgArea.getY(); | |
| 1 | 596 |
| 73 | 597 util.dprintln( |
| 598 2, | |
| 85 | 599 "crop: " |
| 73 | 600 + areaXoff |
| 601 + "," | |
| 602 + areaYoff | |
| 603 + " " | |
| 604 + areaWidth | |
| 605 + "x" | |
| 606 + areaHeight); | |
| 1 | 607 |
| 73 | 608 // check image parameters sanity |
| 609 if ((areaWidth < 1) | |
| 610 || (areaHeight < 1) | |
| 611 || (scaleXY * areaWidth < 2) | |
| 612 || (scaleXY * areaHeight < 2)) { | |
| 613 util.dprintln(1, "ERROR: invalid scale parameter set!"); | |
| 614 throw new ImageOpException("Invalid scale parameter set!"); | |
| 615 } | |
| 1 | 616 |
| 85 | 617 /* |
| 618 * crop and scale image | |
| 619 */ | |
| 620 | |
| 621 // use subimage loading if possible | |
| 622 if (docuImage.isSubimageSupported()) { | |
| 623 System.out.println( | |
| 624 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 625 double subf = 1d; | |
| 626 double subsamp = 1d; | |
| 627 if (scaleXY < 1) { | |
| 628 subf = 1 / scaleXY; | |
| 140 | 629 // for higher quality reduce subsample factor by minSubsample |
| 630 if (scaleQual > 0) { | |
| 631 subsamp = | |
| 632 Math.max( | |
| 633 Math.floor(subf / dlConfig.getMinSubsample()), | |
| 634 1d); | |
| 635 } else { | |
| 636 subsamp = Math.floor(subf); | |
| 637 } | |
| 85 | 638 scaleXY = subsamp / subf; |
| 639 System.out.println( | |
| 640 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 641 } | |
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642 |
| 85 | 643 docuImage.loadSubimage( |
| 149 | 644 fileToLoad, |
| 100 | 645 outerUserImgArea.getBounds(), |
| 85 | 646 (int) subsamp); |
| 647 | |
| 648 System.out.println( | |
| 649 "SUBSAMP: " | |
| 650 + subsamp | |
| 651 + " -> " | |
| 652 + docuImage.getWidth() | |
| 653 + "x" | |
| 654 + docuImage.getHeight()); | |
| 655 | |
| 149 | 656 docuImage.scale(scaleXY, scaleXY); |
| 85 | 657 |
| 658 } else { | |
| 100 | 659 // else load and crop the whole file |
| 149 | 660 docuImage.loadImage(fileToLoad); |
| 85 | 661 docuImage.crop( |
| 662 (int) areaXoff, | |
| 663 (int) areaYoff, | |
| 664 (int) areaWidth, | |
| 665 (int) areaHeight); | |
| 666 | |
| 149 | 667 docuImage.scale(scaleXY, scaleXY); |
| 85 | 668 } |
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669 |
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670 // mirror image |
| 100 | 671 // operation mode: "hmir": mirror horizontally, "vmir": mirror vertically |
| 672 if (dlRequest.isOption("hmir")) { | |
| 673 docuImage.mirror(0); | |
| 674 } | |
| 675 if (dlRequest.isOption("vmir")) { | |
| 676 docuImage.mirror(90); | |
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677 } |
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678 |
| 100 | 679 // rotate image |
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680 if (paramROT != 0) { |
| 94 | 681 docuImage.rotate(paramROT); |
| 100 | 682 if (wholeRotArea) { |
| 683 // crop to the inner bounding box | |
| 684 double xcrop = | |
| 685 docuImage.getWidth() | |
| 686 - innerUserImgArea.getWidth() * scaleXY; | |
| 687 double ycrop = | |
| 688 docuImage.getHeight() | |
| 689 - innerUserImgArea.getHeight() * scaleXY; | |
| 690 if ((xcrop > 0) || (ycrop > 0)) { | |
| 691 // only crop smaller | |
| 692 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 693 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 694 // crop image | |
| 695 docuImage.crop( | |
| 696 (int) (xcrop / 2), | |
| 697 (int) (ycrop / 2), | |
| 698 (int) (docuImage.getWidth() - xcrop), | |
| 699 (int) (docuImage.getHeight() - ycrop)); | |
| 700 } | |
| 701 } | |
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702 |
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703 } |
| 1 | 704 |
| 86 | 705 // color modification |
| 706 if ((paramRGBM != null) || (paramRGBA != null)) { | |
| 707 // make shure we actually have two arrays | |
| 708 if (paramRGBM == null) { | |
| 709 paramRGBM = new float[3]; | |
| 710 } | |
| 711 if (paramRGBA == null) { | |
| 712 paramRGBA = new float[3]; | |
| 713 } | |
| 100 | 714 // calculate "contrast" values (c=2^x) |
| 86 | 715 float[] mult = new float[3]; |
| 716 for (int i = 0; i < 3; i++) { | |
| 94 | 717 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 718 } |
| 719 docuImage.enhanceRGB(mult, paramRGBA); | |
| 720 } | |
| 94 | 721 |
| 100 | 722 // contrast and brightness enhancement |
| 723 if ((paramCONT != 0) || (paramBRGT != 0)) { | |
| 724 double mult = Math.pow(2, paramCONT); | |
| 725 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 726 } | |
| 727 | |
| 73 | 728 util.dprintln( |
| 729 2, | |
| 730 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 731 | |
| 732 /* | |
| 733 * write the resulting image | |
| 734 */ | |
| 1 | 735 |
| 73 | 736 // setup output -- if source is JPG then dest will be JPG else it's PNG |
| 100 | 737 if (mimeType.equals("image/jpeg") |
| 738 || mimeType.equals("image/jp2")) { | |
| 739 mimeType = "image/jpeg"; | |
| 740 } else { | |
| 73 | 741 mimeType = "image/png"; |
| 742 } | |
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743 response.setContentType(mimeType); |
| 1 | 744 |
| 73 | 745 // write the image |
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746 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 747 |
| 73 | 748 util.dprintln( |
| 749 1, | |
| 750 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 751 | |
| 752 /* | |
| 753 * error handling | |
| 754 */ | |
| 1 | 755 |
| 73 | 756 } // end of "big" try |
| 757 catch (FileOpException e) { | |
| 758 util.dprintln(1, "ERROR: File IO Error: " + e); | |
| 759 try { | |
| 760 if (errorMsgHtml) { | |
| 761 ServletOps.htmlMessage( | |
| 762 "ERROR: File IO Error: " + e, | |
| 763 response); | |
| 764 } else { | |
| 765 servletOp.sendFile( | |
| 766 new File(dlConfig.getErrorImgFileName()), | |
| 767 response); | |
| 768 } | |
| 769 } catch (FileOpException ex) { | |
| 770 } // so we don't get a loop | |
| 771 } catch (AuthOpException e) { | |
| 772 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 773 try { | |
| 774 if (errorMsgHtml) { | |
| 775 ServletOps.htmlMessage( | |
| 776 "ERROR: Authorization error: " + e, | |
| 777 response); | |
| 778 } else { | |
| 779 servletOp.sendFile( | |
| 780 new File(dlConfig.getErrorImgFileName()), | |
| 781 response); | |
| 782 } | |
| 783 } catch (FileOpException ex) { | |
| 784 } // so we don't get a loop | |
| 785 } catch (ImageOpException e) { | |
| 786 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 787 try { | |
| 788 if (errorMsgHtml) { | |
| 789 ServletOps.htmlMessage( | |
| 790 "ERROR: Image Operation Error: " + e, | |
| 791 response); | |
| 792 } else { | |
| 793 servletOp.sendFile( | |
| 794 new File(dlConfig.getErrorImgFileName()), | |
| 795 response); | |
| 796 } | |
| 797 } catch (FileOpException ex) { | |
| 798 } // so we don't get a loop | |
| 799 } catch (RuntimeException e) { | |
| 800 // JAI likes to throw RuntimeExceptions ;-( | |
| 801 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 802 try { | |
| 803 if (errorMsgHtml) { | |
| 804 ServletOps.htmlMessage( | |
| 805 "ERROR: Other Image Operation Error: " + e, | |
| 806 response); | |
| 807 } else { | |
| 808 servletOp.sendFile( | |
| 809 new File(dlConfig.getErrorImgFileName()), | |
| 810 response); | |
| 811 } | |
| 812 } catch (FileOpException ex) { | |
| 813 } // so we don't get a loop | |
| 149 | 814 |
| 73 | 815 } |
| 816 } | |
| 1 | 817 |
| 73 | 818 } //Scaler class |