Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 129:ed7c1e4dd177
Servlet Version 1.10b2
- with RDF infrastructure in DigilibRequest
| author | robcast |
|---|---|
| date | Mon, 30 Jun 2003 17:25:43 +0200 |
| parents | a32e8c80e2f2 |
| children | c36944be0b58 |
| 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 | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 */ | |
| 20 | |
| 21 package digilib.servlet; | |
| 22 | |
| 86 | 23 import java.awt.Dimension; |
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24 import java.awt.geom.AffineTransform; |
| 100 | 25 import java.awt.geom.NoninvertibleTransformException; |
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26 import java.awt.geom.Rectangle2D; |
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27 import java.io.File; |
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28 import java.io.IOException; |
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29 import java.util.List; |
| 1 | 30 |
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31 import javax.servlet.ServletConfig; |
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32 import javax.servlet.ServletContext; |
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33 import javax.servlet.ServletException; |
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34 import javax.servlet.http.HttpServlet; |
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35 import javax.servlet.http.HttpServletRequest; |
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36 import javax.servlet.http.HttpServletResponse; |
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37 |
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38 import digilib.Utils; |
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39 import digilib.auth.AuthOpException; |
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40 import digilib.auth.AuthOps; |
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41 import digilib.image.DocuImage; |
| 122 | 42 import digilib.image.DocuInfo; |
| 43 import digilib.image.ImageLoaderDocuInfo; | |
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44 import digilib.image.ImageOpException; |
| 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) |
| 129 | 61 public static final String dlVersion = "1.10b2"; |
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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(); | |
| 1 | 93 |
| 73 | 94 // get our ServletContext |
| 95 ServletContext context = config.getServletContext(); | |
| 96 // see if there is a Configuration instance | |
| 97 dlConfig = | |
| 98 (DigilibConfiguration) context.getAttribute( | |
| 86 | 99 "digilib.servlet.configuration"); |
| 73 | 100 if (dlConfig == null) { |
| 101 // create new Configuration | |
| 102 try { | |
| 103 dlConfig = new DigilibConfiguration(config); | |
| 86 | 104 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 105 } catch (Exception e) { |
| 106 throw new ServletException(e); | |
| 107 } | |
| 108 } | |
| 109 // set the servlet version | |
| 110 dlConfig.setServletVersion(dlVersion); | |
| 111 // first we need an Utils | |
| 112 util = dlConfig.getUtil(); | |
| 113 // set our AuthOps | |
| 114 useAuthentication = dlConfig.isUseAuthentication(); | |
| 115 authOp = dlConfig.getAuthOp(); | |
| 116 // FileOps instance | |
| 117 fileOp = new FileOps(util); | |
| 118 // AuthOps instance | |
| 119 servletOp = new ServletOps(util); | |
| 86 | 120 // DocuDirCache instance |
| 121 dirCache = dlConfig.getDirCache(); | |
| 73 | 122 } |
| 1 | 123 |
| 73 | 124 /** Process the HTTP Get request*/ |
| 125 public void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 126 throws ServletException, IOException { | |
| 127 util.dprintln(1, "The servlet has received a GET!"); | |
| 128 // create new request with defaults | |
| 129 DigilibRequest dlReq = new DigilibRequest(); | |
| 130 // set with request parameters | |
| 131 dlReq.setWithRequest(request); | |
| 132 // add DigilibRequest to ServletRequest | |
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133 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 134 // do the processing |
| 135 processRequest(request, response); | |
| 136 } | |
| 1 | 137 |
| 73 | 138 /**Process the HTTP Post request*/ |
| 139 public void doPost( | |
| 140 HttpServletRequest request, | |
| 141 HttpServletResponse response) | |
| 142 throws ServletException, IOException { | |
| 143 util.dprintln(1, "The servlet has received a POST!"); | |
| 144 // create new request with defaults | |
| 145 DigilibRequest dlReq = new DigilibRequest(); | |
| 146 // set with request parameters | |
| 147 dlReq.setWithRequest(request); | |
| 148 // add DigilibRequest to ServletRequest | |
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149 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 150 // do the processing |
| 151 processRequest(request, response); | |
| 152 } | |
| 153 | |
| 154 /** main request handler. */ | |
| 155 void processRequest( | |
| 156 HttpServletRequest request, | |
| 157 HttpServletResponse response) | |
| 158 throws ServletException, IOException { | |
| 1 | 159 |
| 73 | 160 // time for benchmarking |
| 161 long startTime = System.currentTimeMillis(); | |
| 162 // output mime/type | |
| 163 String mimeType = "image/png"; | |
| 1 | 164 |
| 73 | 165 /* |
| 166 * parameters for a session | |
| 167 */ | |
| 1 | 168 |
| 73 | 169 // scale the image file to fit window size i.e. respect dw,dh |
| 170 boolean scaleToFit = true; | |
| 100 | 171 // scale the image by a fixed factor only |
| 172 boolean absoluteScale = false; | |
| 122 | 173 // only crop the image to fit |
| 174 boolean cropToFit = false; | |
| 175 // try different resolution images automatically | |
| 176 boolean autoRes = true; | |
| 177 // use hires images (if autoRes == false) | |
| 178 boolean hiresOnly = false; | |
| 73 | 179 // interpolation to use for scaling |
| 180 int scaleQual = 0; | |
| 181 // send html error message (or image file) | |
| 182 boolean errorMsgHtml = false; | |
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183 // mirror the image |
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184 boolean doMirror = false; |
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185 // angle of mirror axis |
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186 double mirrorAngle = 0; |
| 1 | 187 |
| 73 | 188 /* |
| 189 * request parameters | |
| 190 */ | |
| 191 | |
| 192 DigilibRequest dlRequest = | |
| 193 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 194 |
| 73 | 195 // destination image width |
| 196 int paramDW = dlRequest.getDw(); | |
| 197 // destination image height | |
| 198 int paramDH = dlRequest.getDh(); | |
| 122 | 199 // dw and dh shouldn't be empty, if they are, set dw=dh |
| 200 if (paramDW <= 0) { | |
| 201 paramDW = paramDH; | |
| 202 } | |
| 203 if (paramDH <= 0) { | |
| 204 paramDH = paramDW; | |
| 205 } | |
| 73 | 206 // relative area x_offset (0..1) |
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207 double paramWX = dlRequest.getWx(); |
| 73 | 208 // relative area y_offset |
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209 double paramWY = dlRequest.getWy(); |
| 73 | 210 // relative area width (0..1) |
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211 double paramWW = dlRequest.getWw(); |
| 73 | 212 // relative area height |
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213 double paramWH = dlRequest.getWh(); |
| 73 | 214 // scale factor (additional to dw/width, dh/height) |
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215 double paramWS = dlRequest.getWs(); |
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216 // rotation angle |
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217 double paramROT = dlRequest.getRot(); |
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218 // contrast enhancement |
| 86 | 219 float paramCONT = dlRequest.getCont(); |
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220 // brightness enhancement |
| 86 | 221 float paramBRGT = dlRequest.getBrgt(); |
| 222 // color modification | |
| 223 float[] paramRGBM = dlRequest.getRgbm(); | |
| 224 float[] paramRGBA = dlRequest.getRgba(); | |
| 1 | 225 |
| 73 | 226 /* operation mode: "fit": always fit to page, |
| 227 * "clip": send original resolution cropped, "file": send whole file (if | |
| 228 * allowed) | |
| 229 */ | |
| 230 if (dlRequest.isOption("clip")) { | |
| 231 scaleToFit = false; | |
| 100 | 232 absoluteScale = false; |
| 73 | 233 cropToFit = true; |
| 122 | 234 autoRes = true; |
| 73 | 235 } else if (dlRequest.isOption("fit")) { |
| 236 scaleToFit = true; | |
| 100 | 237 absoluteScale = false; |
| 122 | 238 cropToFit = false; |
| 239 autoRes = true; | |
| 100 | 240 } else if (dlRequest.isOption("scale")) { |
| 241 scaleToFit = false; | |
| 242 absoluteScale = true; | |
| 122 | 243 cropToFit = false; |
| 244 autoRes = false; | |
| 245 hiresOnly = true; | |
| 73 | 246 } else if (dlRequest.isOption("file")) { |
| 247 scaleToFit = false; | |
| 100 | 248 absoluteScale = false; |
| 73 | 249 if (dlConfig.isSendFileAllowed()) { |
| 250 cropToFit = false; | |
| 251 } else { | |
| 122 | 252 // crop to fit if send file not allowed |
| 73 | 253 cropToFit = true; |
| 254 } | |
| 122 | 255 autoRes = false; |
| 256 hiresOnly = true; | |
| 73 | 257 } |
| 258 // operation mode: "errtxt": error message in html, "errimg": error image | |
| 259 if (dlRequest.isOption("errtxt")) { | |
| 260 errorMsgHtml = true; | |
| 261 } else if (dlRequest.isOption("errimg")) { | |
| 262 errorMsgHtml = false; | |
| 263 } | |
| 264 // operation mode: "q0" - "q2": interpolation quality | |
| 265 if (dlRequest.isOption("q0")) { | |
| 266 scaleQual = 0; | |
| 267 } else if (dlRequest.isOption("q1")) { | |
| 268 scaleQual = 1; | |
| 269 } else if (dlRequest.isOption("q2")) { | |
| 270 scaleQual = 2; | |
| 271 } | |
| 272 // operation mode: "lores": try to use scaled image, "hires": use unscaled image | |
| 122 | 273 // "autores": try best fitting resolution |
| 73 | 274 if (dlRequest.isOption("lores")) { |
| 122 | 275 autoRes = false; |
| 276 hiresOnly = false; | |
| 73 | 277 } else if (dlRequest.isOption("hires")) { |
| 122 | 278 autoRes = false; |
| 279 hiresOnly = true; | |
| 280 } else if (dlRequest.isOption("autores")) { | |
| 281 autoRes = true; | |
| 73 | 282 } |
| 1 | 283 |
| 73 | 284 //"big" try for all file/image actions |
| 285 try { | |
| 286 | |
| 86 | 287 // new DocuImage instance |
| 73 | 288 DocuImage docuImage = dlConfig.getDocuImageInstance(); |
| 289 if (docuImage == null) { | |
| 290 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 291 } | |
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292 |
| 122 | 293 // new DocuInfo instance |
| 294 DocuInfo docuInfo = new ImageLoaderDocuInfo(); | |
| 295 | |
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296 // set interpolation quality |
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297 docuImage.setQuality(scaleQual); |
| 73 | 298 |
| 299 /* | |
| 300 * find the file to load/send | |
| 301 */ | |
| 1 | 302 |
| 73 | 303 // get PathInfo |
| 304 String loadPathName = dlRequest.getFilePath(); | |
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305 |
| 73 | 306 /* |
| 307 * check permissions | |
| 308 */ | |
| 309 if (useAuthentication) { | |
| 310 // get a list of required roles (empty if no restrictions) | |
| 311 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 312 if (rolesRequired != null) { | |
| 313 util.dprintln(1, "Role required: " + rolesRequired); | |
| 314 util.dprintln(2, "User: " + request.getRemoteUser()); | |
| 315 // is the current request/user authorized? | |
| 316 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 317 // send deny answer and abort | |
| 318 util.dprintln(1, "ERROR: access denied!"); | |
| 319 if (errorMsgHtml) { | |
| 320 ServletOps.htmlMessage( | |
| 321 "ERROR: Unauthorized access!", | |
| 322 response); | |
| 323 } else { | |
| 324 servletOp.sendFile( | |
| 325 new File(dlConfig.getDenyImgFileName()), | |
| 326 response); | |
| 327 } | |
| 328 return; | |
| 329 } | |
| 330 } | |
| 331 } | |
| 1 | 332 |
| 122 | 333 // find the file(set) |
| 86 | 334 DocuFile fileToLoad; |
| 94 | 335 DocuFileset fileset = |
| 336 dirCache.getFileset(loadPathName, dlRequest.getPn()); | |
| 337 if (fileset == null) { | |
| 338 throw new FileOpException( | |
| 339 "File " | |
| 340 + loadPathName | |
| 341 + "(" | |
| 342 + dlRequest.getPn() | |
| 343 + ") not found."); | |
| 344 } | |
| 345 | |
| 122 | 346 /* |
| 347 * calculate expected source image size | |
| 348 * | |
| 349 */ | |
| 350 Dimension expectedSourceSize = new Dimension(); | |
| 351 if (scaleToFit) { | |
| 352 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 353 expectedSourceSize.setSize(paramDW * scale, paramDH * scale); | |
| 354 } else { | |
| 355 expectedSourceSize.setSize( | |
| 356 paramDW * paramWS, | |
| 357 paramDH * paramWS); | |
| 100 | 358 } |
| 359 | |
| 122 | 360 /* |
| 361 * select a resolution | |
| 362 */ | |
| 363 if (autoRes) { | |
| 364 // autores: use next bigger resolution | |
| 365 fileToLoad = | |
| 366 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 367 if (fileToLoad == null) { | |
| 368 // this is the biggest we have | |
| 369 fileToLoad = fileset.get(0); | |
| 370 } | |
| 86 | 371 } else { |
| 122 | 372 // enforced hires or lores |
| 373 if (hiresOnly) { | |
| 374 // get first element | |
| 375 fileToLoad = fileset.get(0); | |
| 376 } else { | |
| 377 // enforced lores uses next smaller resolution | |
| 378 fileToLoad = | |
| 379 fileset.getNextSmaller(expectedSourceSize, docuInfo); | |
| 380 if (fileToLoad == null) { | |
| 381 // this is the smallest we have | |
| 382 fileToLoad = fileset.get(fileset.size() - 1); | |
| 383 } | |
| 384 } | |
| 86 | 385 } |
| 386 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 387 |
| 86 | 388 // check the source image |
| 122 | 389 if (!fileToLoad.isChecked()) { |
| 390 fileToLoad.check(docuInfo); | |
| 391 } | |
| 86 | 392 // get the source image type |
| 393 mimeType = fileToLoad.getMimetype(); | |
| 122 | 394 boolean imageSendable = |
| 395 mimeType.equals("image/jpeg") | |
| 396 || mimeType.equals("image/png") | |
| 397 || mimeType.equals("image/gif"); | |
| 73 | 398 |
| 122 | 399 /* if not autoRes and image smaller than requested |
| 400 * size then send as is. | |
| 100 | 401 * if not autoScale and not scaleToFit nor cropToFit |
| 122 | 402 * then send as is (mo=file) |
| 73 | 403 */ |
| 122 | 404 if ((!autoRes |
| 405 && imageSendable | |
| 406 && (fileToLoad.getSize().width <= expectedSourceSize.width) | |
| 407 && (fileToLoad.getSize().height <= expectedSourceSize.height)) | |
| 408 || (!autoRes && !scaleToFit && !cropToFit)) { | |
| 73 | 409 |
| 410 util.dprintln(1, "Sending File as is."); | |
| 1 | 411 |
| 86 | 412 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 413 |
| 73 | 414 util.dprintln( |
| 415 1, | |
| 416 "Done in " | |
| 417 + (System.currentTimeMillis() - startTime) | |
| 418 + "ms"); | |
| 419 return; | |
| 420 } | |
| 1 | 421 |
| 73 | 422 /* |
| 423 * crop and scale the image | |
| 424 */ | |
| 1 | 425 |
| 86 | 426 int imgWidth = 0; |
| 427 int imgHeight = 0; | |
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428 // get image size |
| 86 | 429 if (fileToLoad.getSize() == null) { |
| 430 // size unknown so far | |
| 431 imgWidth = docuImage.getWidth(); | |
| 432 imgHeight = docuImage.getHeight(); | |
| 433 // remember size | |
| 434 fileToLoad.setSize(new Dimension(imgWidth, imgHeight)); | |
| 435 } else { | |
| 436 imgWidth = fileToLoad.getSize().width; | |
| 437 imgHeight = fileToLoad.getSize().height; | |
| 438 } | |
| 94 | 439 |
| 73 | 440 util.dprintln(2, "IMG: " + imgWidth + "x" + imgHeight); |
| 441 util.dprintln( | |
| 442 2, | |
| 443 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 444 |
| 73 | 445 // coordinates and scaling |
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446 double areaXoff; |
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447 double areaYoff; |
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448 double areaWidth; |
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449 double areaHeight; |
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450 double scaleX; |
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451 double scaleY; |
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452 double scaleXY; |
| 1 | 453 |
| 100 | 454 // coordinates using Java2D |
| 455 // image size in pixels | |
| 456 Rectangle2D imgBounds = | |
| 457 new Rectangle2D.Double(0, 0, imgWidth, imgHeight); | |
| 458 // user window area in [0,1] coordinates | |
| 459 Rectangle2D relUserArea = | |
| 460 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 461 // transform from relative [0,1] to image coordinates. | |
| 462 AffineTransform imgTrafo = | |
| 463 AffineTransform.getScaleInstance(imgWidth, imgHeight); | |
| 85 | 464 // transform user coordinate area to image coordinate area |
| 100 | 465 Rectangle2D userImgArea = |
| 466 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 467 | |
| 468 // calculate scaling factors based on inner user area | |
| 73 | 469 if (scaleToFit) { |
| 100 | 470 areaWidth = userImgArea.getWidth(); |
| 471 areaHeight = userImgArea.getHeight(); | |
| 73 | 472 scaleX = paramDW / areaWidth * paramWS; |
| 473 scaleY = paramDH / areaHeight * paramWS; | |
| 474 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 475 } else if (absoluteScale) { |
| 476 // absolute scale | |
| 477 areaWidth = paramDW * paramWS; | |
| 478 areaHeight = paramDH * paramWS; | |
| 479 // reset user area size | |
| 480 userImgArea.setRect( | |
| 481 userImgArea.getX(), | |
| 482 userImgArea.getY(), | |
| 483 areaWidth, | |
| 484 areaHeight); | |
| 485 scaleX = 1f; | |
| 486 scaleY = 1f; | |
| 487 scaleXY = 1f; | |
| 73 | 488 } else { |
| 489 // crop to fit | |
| 85 | 490 areaWidth = paramDW * paramWS; |
| 491 areaHeight = paramDH * paramWS; | |
| 100 | 492 // reset user area size |
| 493 userImgArea.setRect( | |
| 494 userImgArea.getX(), | |
| 495 userImgArea.getY(), | |
| 496 areaWidth, | |
| 497 areaHeight); | |
| 73 | 498 scaleX = 1f; |
| 499 scaleY = 1f; | |
| 500 scaleXY = 1f; | |
| 100 | 501 } |
| 85 | 502 |
| 100 | 503 // enlarge image area for rotations to cover additional pixels |
| 504 Rectangle2D outerUserImgArea = userImgArea; | |
| 505 Rectangle2D innerUserImgArea = userImgArea; | |
| 506 if (wholeRotArea) { | |
| 507 if (paramROT != 0) { | |
| 508 try { | |
| 509 // rotate user area coordinates around center of user area | |
| 510 AffineTransform rotTrafo = | |
| 511 AffineTransform.getRotateInstance( | |
| 512 Math.toRadians(paramROT), | |
| 513 userImgArea.getCenterX(), | |
| 514 userImgArea.getCenterY()); | |
| 515 // get bounds from rotated end position | |
| 516 innerUserImgArea = | |
| 517 rotTrafo | |
| 518 .createTransformedShape(userImgArea) | |
| 519 .getBounds2D(); | |
| 520 // get bounds from back-rotated bounds | |
| 521 outerUserImgArea = | |
| 522 rotTrafo | |
| 523 .createInverse() | |
| 524 .createTransformedShape(innerUserImgArea) | |
| 525 .getBounds2D(); | |
| 526 } catch (NoninvertibleTransformException e1) { | |
| 527 // this shouldn't happen anyway | |
| 528 e1.printStackTrace(); | |
| 529 } | |
| 530 } | |
| 73 | 531 } |
| 1 | 532 |
| 73 | 533 util.dprintln( |
| 534 1, | |
| 535 "Scale " | |
| 536 + scaleXY | |
| 537 + "(" | |
| 538 + scaleX | |
| 539 + "," | |
| 540 + scaleY | |
| 541 + ") on " | |
| 100 | 542 + outerUserImgArea); |
| 1 | 543 |
| 73 | 544 // clip area at the image border |
| 100 | 545 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
| 85 | 546 |
| 100 | 547 areaWidth = outerUserImgArea.getWidth(); |
| 548 areaHeight = outerUserImgArea.getHeight(); | |
| 549 areaXoff = outerUserImgArea.getX(); | |
| 550 areaYoff = outerUserImgArea.getY(); | |
| 1 | 551 |
| 73 | 552 util.dprintln( |
| 553 2, | |
| 85 | 554 "crop: " |
| 73 | 555 + areaXoff |
| 556 + "," | |
| 557 + areaYoff | |
| 558 + " " | |
| 559 + areaWidth | |
| 560 + "x" | |
| 561 + areaHeight); | |
| 1 | 562 |
| 73 | 563 // check image parameters sanity |
| 564 if ((areaWidth < 1) | |
| 565 || (areaHeight < 1) | |
| 566 || (scaleXY * areaWidth < 2) | |
| 567 || (scaleXY * areaHeight < 2)) { | |
| 568 util.dprintln(1, "ERROR: invalid scale parameter set!"); | |
| 569 throw new ImageOpException("Invalid scale parameter set!"); | |
| 570 } | |
| 1 | 571 |
| 85 | 572 /* |
| 573 * crop and scale image | |
| 574 */ | |
| 575 | |
| 576 // use subimage loading if possible | |
| 577 if (docuImage.isSubimageSupported()) { | |
| 578 System.out.println( | |
| 579 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 580 double subf = 1d; | |
| 581 double subsamp = 1d; | |
| 582 if (scaleXY < 1) { | |
| 583 subf = 1 / scaleXY; | |
| 584 subsamp = Math.floor(subf); | |
| 585 scaleXY = subsamp / subf; | |
| 586 System.out.println( | |
| 587 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 588 } | |
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589 |
| 85 | 590 docuImage.loadSubimage( |
| 86 | 591 fileToLoad.getFile(), |
| 100 | 592 outerUserImgArea.getBounds(), |
| 85 | 593 (int) subsamp); |
| 594 | |
| 595 System.out.println( | |
| 596 "SUBSAMP: " | |
| 597 + subsamp | |
| 598 + " -> " | |
| 599 + docuImage.getWidth() | |
| 600 + "x" | |
| 601 + docuImage.getHeight()); | |
| 602 | |
| 603 docuImage.scale(scaleXY); | |
| 604 | |
| 605 } else { | |
| 100 | 606 // else load and crop the whole file |
| 86 | 607 docuImage.loadImage(fileToLoad.getFile()); |
| 85 | 608 docuImage.crop( |
| 609 (int) areaXoff, | |
| 610 (int) areaYoff, | |
| 611 (int) areaWidth, | |
| 612 (int) areaHeight); | |
| 613 | |
| 614 docuImage.scale(scaleXY); | |
| 615 } | |
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616 |
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63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
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changeset
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617 // mirror image |
| 100 | 618 // operation mode: "hmir": mirror horizontally, "vmir": mirror vertically |
| 619 if (dlRequest.isOption("hmir")) { | |
| 620 docuImage.mirror(0); | |
| 621 } | |
| 622 if (dlRequest.isOption("vmir")) { | |
| 623 docuImage.mirror(90); | |
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624 } |
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73
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625 |
| 100 | 626 // rotate image |
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Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
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627 if (paramROT != 0) { |
| 94 | 628 docuImage.rotate(paramROT); |
| 100 | 629 if (wholeRotArea) { |
| 630 // crop to the inner bounding box | |
| 631 double xcrop = | |
| 632 docuImage.getWidth() | |
| 633 - innerUserImgArea.getWidth() * scaleXY; | |
| 634 double ycrop = | |
| 635 docuImage.getHeight() | |
| 636 - innerUserImgArea.getHeight() * scaleXY; | |
| 637 if ((xcrop > 0) || (ycrop > 0)) { | |
| 638 // only crop smaller | |
| 639 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 640 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 641 // crop image | |
| 642 docuImage.crop( | |
| 643 (int) (xcrop / 2), | |
| 644 (int) (ycrop / 2), | |
| 645 (int) (docuImage.getWidth() - xcrop), | |
| 646 (int) (docuImage.getHeight() - ycrop)); | |
| 647 } | |
| 648 } | |
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63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
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649 |
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63c8186455c1
Servlet version 1.6b. Further cleanup and new functionality:
robcast
parents:
73
diff
changeset
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650 } |
| 1 | 651 |
| 86 | 652 // color modification |
| 653 if ((paramRGBM != null) || (paramRGBA != null)) { | |
| 654 // make shure we actually have two arrays | |
| 655 if (paramRGBM == null) { | |
| 656 paramRGBM = new float[3]; | |
| 657 } | |
| 658 if (paramRGBA == null) { | |
| 659 paramRGBA = new float[3]; | |
| 660 } | |
| 100 | 661 // calculate "contrast" values (c=2^x) |
| 86 | 662 float[] mult = new float[3]; |
| 663 for (int i = 0; i < 3; i++) { | |
| 94 | 664 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 665 } |
| 666 docuImage.enhanceRGB(mult, paramRGBA); | |
| 667 } | |
| 94 | 668 |
| 100 | 669 // contrast and brightness enhancement |
| 670 if ((paramCONT != 0) || (paramBRGT != 0)) { | |
| 671 double mult = Math.pow(2, paramCONT); | |
| 672 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 673 } | |
| 674 | |
| 73 | 675 util.dprintln( |
| 676 2, | |
| 677 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 678 | |
| 679 /* | |
| 680 * write the resulting image | |
| 681 */ | |
| 1 | 682 |
| 73 | 683 // setup output -- if source is JPG then dest will be JPG else it's PNG |
| 100 | 684 if (mimeType.equals("image/jpeg") |
| 685 || mimeType.equals("image/jp2")) { | |
| 686 mimeType = "image/jpeg"; | |
| 687 } else { | |
| 73 | 688 mimeType = "image/png"; |
| 689 } | |
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690 response.setContentType(mimeType); |
| 1 | 691 |
| 73 | 692 // write the image |
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73
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693 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 694 |
| 73 | 695 util.dprintln( |
| 696 1, | |
| 697 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 698 | |
| 699 /* | |
| 700 * error handling | |
| 701 */ | |
| 1 | 702 |
| 73 | 703 } // end of "big" try |
| 704 catch (FileOpException e) { | |
| 705 util.dprintln(1, "ERROR: File IO Error: " + e); | |
| 706 try { | |
| 707 if (errorMsgHtml) { | |
| 708 ServletOps.htmlMessage( | |
| 709 "ERROR: File IO Error: " + e, | |
| 710 response); | |
| 711 } else { | |
| 712 servletOp.sendFile( | |
| 713 new File(dlConfig.getErrorImgFileName()), | |
| 714 response); | |
| 715 } | |
| 716 } catch (FileOpException ex) { | |
| 717 } // so we don't get a loop | |
| 718 return; | |
| 719 } catch (AuthOpException e) { | |
| 720 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 721 try { | |
| 722 if (errorMsgHtml) { | |
| 723 ServletOps.htmlMessage( | |
| 724 "ERROR: Authorization error: " + e, | |
| 725 response); | |
| 726 } else { | |
| 727 servletOp.sendFile( | |
| 728 new File(dlConfig.getErrorImgFileName()), | |
| 729 response); | |
| 730 } | |
| 731 } catch (FileOpException ex) { | |
| 732 } // so we don't get a loop | |
| 733 return; | |
| 734 } catch (ImageOpException e) { | |
| 735 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 736 try { | |
| 737 if (errorMsgHtml) { | |
| 738 ServletOps.htmlMessage( | |
| 739 "ERROR: Image Operation Error: " + e, | |
| 740 response); | |
| 741 } else { | |
| 742 servletOp.sendFile( | |
| 743 new File(dlConfig.getErrorImgFileName()), | |
| 744 response); | |
| 745 } | |
| 746 } catch (FileOpException ex) { | |
| 747 } // so we don't get a loop | |
| 748 return; | |
| 749 } catch (RuntimeException e) { | |
| 750 // JAI likes to throw RuntimeExceptions ;-( | |
| 751 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 752 try { | |
| 753 if (errorMsgHtml) { | |
| 754 ServletOps.htmlMessage( | |
| 755 "ERROR: Other Image Operation Error: " + e, | |
| 756 response); | |
| 757 } else { | |
| 758 servletOp.sendFile( | |
| 759 new File(dlConfig.getErrorImgFileName()), | |
| 760 response); | |
| 761 } | |
| 762 } catch (FileOpException ex) { | |
| 763 } // so we don't get a loop | |
| 764 return; | |
| 765 } | |
| 766 } | |
| 1 | 767 |
| 73 | 768 } //Scaler class |