Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 140:c878ea574c29
Servlet Version 1.12b2
- fixed small error in XML config parser
- improved high quality scaling with minSubsample parameter
| author | robcast |
|---|---|
| date | Fri, 15 Aug 2003 23:52:20 +0200 |
| parents | 11cfe4c89fdc |
| children | f52a7664a807 |
| 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) |
| 140 | 61 public static final String dlVersion = "1.12b2"; |
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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(); | |
| 140 | 93 System.out.println("***** Digital Image Library Servlet (version "+dlVersion+") *****"); |
| 1 | 94 |
| 73 | 95 // get our ServletContext |
| 96 ServletContext context = config.getServletContext(); | |
| 97 // see if there is a Configuration instance | |
| 98 dlConfig = | |
| 99 (DigilibConfiguration) context.getAttribute( | |
| 86 | 100 "digilib.servlet.configuration"); |
| 73 | 101 if (dlConfig == null) { |
| 102 // create new Configuration | |
| 103 try { | |
| 104 dlConfig = new DigilibConfiguration(config); | |
| 86 | 105 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 106 } catch (Exception e) { |
| 107 throw new ServletException(e); | |
| 108 } | |
| 109 } | |
| 110 // set the servlet version | |
| 111 dlConfig.setServletVersion(dlVersion); | |
| 112 // first we need an Utils | |
| 113 util = dlConfig.getUtil(); | |
| 114 // set our AuthOps | |
| 115 useAuthentication = dlConfig.isUseAuthentication(); | |
| 116 authOp = dlConfig.getAuthOp(); | |
| 117 // FileOps instance | |
| 118 fileOp = new FileOps(util); | |
| 119 // AuthOps instance | |
| 120 servletOp = new ServletOps(util); | |
| 86 | 121 // DocuDirCache instance |
| 122 dirCache = dlConfig.getDirCache(); | |
| 73 | 123 } |
| 1 | 124 |
| 73 | 125 /** Process the HTTP Get request*/ |
| 126 public void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 127 throws ServletException, IOException { | |
| 128 util.dprintln(1, "The servlet has received a GET!"); | |
| 129 // create new request with defaults | |
| 130 DigilibRequest dlReq = new DigilibRequest(); | |
| 131 // set with request parameters | |
| 132 dlReq.setWithRequest(request); | |
| 133 // add DigilibRequest to ServletRequest | |
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134 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 135 // do the processing |
| 136 processRequest(request, response); | |
| 137 } | |
| 1 | 138 |
| 73 | 139 /**Process the HTTP Post request*/ |
| 140 public void doPost( | |
| 141 HttpServletRequest request, | |
| 142 HttpServletResponse response) | |
| 143 throws ServletException, IOException { | |
| 144 util.dprintln(1, "The servlet has received a POST!"); | |
| 145 // create new request with defaults | |
| 146 DigilibRequest dlReq = new DigilibRequest(); | |
| 147 // set with request parameters | |
| 148 dlReq.setWithRequest(request); | |
| 149 // add DigilibRequest to ServletRequest | |
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150 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 151 // do the processing |
| 152 processRequest(request, response); | |
| 153 } | |
| 154 | |
| 155 /** main request handler. */ | |
| 156 void processRequest( | |
| 157 HttpServletRequest request, | |
| 158 HttpServletResponse response) | |
| 159 throws ServletException, IOException { | |
| 1 | 160 |
| 73 | 161 // time for benchmarking |
| 162 long startTime = System.currentTimeMillis(); | |
| 163 // output mime/type | |
| 164 String mimeType = "image/png"; | |
| 1 | 165 |
| 73 | 166 /* |
| 167 * parameters for a session | |
| 168 */ | |
| 1 | 169 |
| 73 | 170 // scale the image file to fit window size i.e. respect dw,dh |
| 171 boolean scaleToFit = true; | |
| 100 | 172 // scale the image by a fixed factor only |
| 173 boolean absoluteScale = false; | |
| 122 | 174 // only crop the image to fit |
| 175 boolean cropToFit = false; | |
| 176 // try different resolution images automatically | |
| 177 boolean autoRes = true; | |
| 178 // use hires images (if autoRes == false) | |
| 179 boolean hiresOnly = false; | |
| 73 | 180 // interpolation to use for scaling |
| 181 int scaleQual = 0; | |
| 182 // send html error message (or image file) | |
| 183 boolean errorMsgHtml = false; | |
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184 // mirror the image |
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185 boolean doMirror = false; |
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186 // angle of mirror axis |
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187 double mirrorAngle = 0; |
| 130 | 188 // original (hires) image resolution |
| 189 double origResX = 0; | |
| 190 double origResY = 0; | |
| 1 | 191 |
| 73 | 192 /* |
| 193 * request parameters | |
| 194 */ | |
| 195 | |
| 196 DigilibRequest dlRequest = | |
| 197 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 198 |
| 73 | 199 // destination image width |
| 200 int paramDW = dlRequest.getDw(); | |
| 201 // destination image height | |
| 202 int paramDH = dlRequest.getDh(); | |
| 122 | 203 // dw and dh shouldn't be empty, if they are, set dw=dh |
| 204 if (paramDW <= 0) { | |
| 205 paramDW = paramDH; | |
| 206 } | |
| 207 if (paramDH <= 0) { | |
| 208 paramDH = paramDW; | |
| 209 } | |
| 73 | 210 // relative area x_offset (0..1) |
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211 double paramWX = dlRequest.getWx(); |
| 73 | 212 // relative area y_offset |
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213 double paramWY = dlRequest.getWy(); |
| 73 | 214 // relative area width (0..1) |
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215 double paramWW = dlRequest.getWw(); |
| 73 | 216 // relative area height |
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217 double paramWH = dlRequest.getWh(); |
| 73 | 218 // scale factor (additional to dw/width, dh/height) |
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219 double paramWS = dlRequest.getWs(); |
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220 // rotation angle |
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221 double paramROT = dlRequest.getRot(); |
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222 // contrast enhancement |
| 86 | 223 float paramCONT = dlRequest.getCont(); |
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224 // brightness enhancement |
| 86 | 225 float paramBRGT = dlRequest.getBrgt(); |
| 226 // color modification | |
| 227 float[] paramRGBM = dlRequest.getRgbm(); | |
| 228 float[] paramRGBA = dlRequest.getRgba(); | |
| 130 | 229 // destination resolution (DPI) |
| 230 float paramDDPIX = dlRequest.getDdpix(); | |
| 231 float paramDDPIY = dlRequest.getDdpiy(); | |
| 232 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
| 233 // if X or Y resolution isn't set, use DDPI | |
| 234 paramDDPIX = dlRequest.getDdpi(); | |
| 235 paramDDPIY = dlRequest.getDdpi(); | |
| 236 } | |
| 1 | 237 |
| 73 | 238 /* operation mode: "fit": always fit to page, |
| 239 * "clip": send original resolution cropped, "file": send whole file (if | |
| 240 * allowed) | |
| 241 */ | |
| 242 if (dlRequest.isOption("clip")) { | |
| 243 scaleToFit = false; | |
| 100 | 244 absoluteScale = false; |
| 73 | 245 cropToFit = true; |
| 122 | 246 autoRes = true; |
| 73 | 247 } else if (dlRequest.isOption("fit")) { |
| 248 scaleToFit = true; | |
| 100 | 249 absoluteScale = false; |
| 122 | 250 cropToFit = false; |
| 251 autoRes = true; | |
| 130 | 252 } else if (dlRequest.isOption("osize")) { |
| 100 | 253 scaleToFit = false; |
| 254 absoluteScale = true; | |
| 122 | 255 cropToFit = false; |
| 256 autoRes = false; | |
| 257 hiresOnly = true; | |
| 73 | 258 } else if (dlRequest.isOption("file")) { |
| 259 scaleToFit = false; | |
| 100 | 260 absoluteScale = false; |
| 73 | 261 if (dlConfig.isSendFileAllowed()) { |
| 262 cropToFit = false; | |
| 263 } else { | |
| 122 | 264 // crop to fit if send file not allowed |
| 73 | 265 cropToFit = true; |
| 266 } | |
| 122 | 267 autoRes = false; |
| 268 hiresOnly = true; | |
| 73 | 269 } |
| 270 // operation mode: "errtxt": error message in html, "errimg": error image | |
| 271 if (dlRequest.isOption("errtxt")) { | |
| 272 errorMsgHtml = true; | |
| 273 } else if (dlRequest.isOption("errimg")) { | |
| 274 errorMsgHtml = false; | |
| 275 } | |
| 276 // operation mode: "q0" - "q2": interpolation quality | |
| 277 if (dlRequest.isOption("q0")) { | |
| 278 scaleQual = 0; | |
| 279 } else if (dlRequest.isOption("q1")) { | |
| 280 scaleQual = 1; | |
| 281 } else if (dlRequest.isOption("q2")) { | |
| 282 scaleQual = 2; | |
| 283 } | |
| 284 // operation mode: "lores": try to use scaled image, "hires": use unscaled image | |
| 122 | 285 // "autores": try best fitting resolution |
| 73 | 286 if (dlRequest.isOption("lores")) { |
| 122 | 287 autoRes = false; |
| 288 hiresOnly = false; | |
| 73 | 289 } else if (dlRequest.isOption("hires")) { |
| 122 | 290 autoRes = false; |
| 291 hiresOnly = true; | |
| 292 } else if (dlRequest.isOption("autores")) { | |
| 293 autoRes = true; | |
| 73 | 294 } |
| 1 | 295 |
| 73 | 296 //"big" try for all file/image actions |
| 297 try { | |
| 298 | |
| 86 | 299 // new DocuImage instance |
| 73 | 300 DocuImage docuImage = dlConfig.getDocuImageInstance(); |
| 301 if (docuImage == null) { | |
| 302 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 303 } | |
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304 |
| 122 | 305 // new DocuInfo instance |
| 306 DocuInfo docuInfo = new ImageLoaderDocuInfo(); | |
| 307 | |
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308 // set interpolation quality |
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309 docuImage.setQuality(scaleQual); |
| 73 | 310 |
| 311 /* | |
| 312 * find the file to load/send | |
| 313 */ | |
| 1 | 314 |
| 73 | 315 // get PathInfo |
| 316 String loadPathName = dlRequest.getFilePath(); | |
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317 |
| 73 | 318 /* |
| 319 * check permissions | |
| 320 */ | |
| 321 if (useAuthentication) { | |
| 322 // get a list of required roles (empty if no restrictions) | |
| 323 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 324 if (rolesRequired != null) { | |
| 325 util.dprintln(1, "Role required: " + rolesRequired); | |
| 326 util.dprintln(2, "User: " + request.getRemoteUser()); | |
| 327 // is the current request/user authorized? | |
| 328 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 329 // send deny answer and abort | |
| 330 util.dprintln(1, "ERROR: access denied!"); | |
| 331 if (errorMsgHtml) { | |
| 332 ServletOps.htmlMessage( | |
| 333 "ERROR: Unauthorized access!", | |
| 334 response); | |
| 335 } else { | |
| 336 servletOp.sendFile( | |
| 337 new File(dlConfig.getDenyImgFileName()), | |
| 338 response); | |
| 339 } | |
| 340 return; | |
| 341 } | |
| 342 } | |
| 343 } | |
| 1 | 344 |
| 122 | 345 // find the file(set) |
| 86 | 346 DocuFile fileToLoad; |
| 94 | 347 DocuFileset fileset = |
| 348 dirCache.getFileset(loadPathName, dlRequest.getPn()); | |
| 349 if (fileset == null) { | |
| 350 throw new FileOpException( | |
| 351 "File " | |
| 352 + loadPathName | |
| 353 + "(" | |
| 354 + dlRequest.getPn() | |
| 355 + ") not found."); | |
| 356 } | |
| 357 | |
| 122 | 358 /* |
| 359 * calculate expected source image size | |
| 360 * | |
| 361 */ | |
| 362 Dimension expectedSourceSize = new Dimension(); | |
| 363 if (scaleToFit) { | |
| 364 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 365 expectedSourceSize.setSize(paramDW * scale, paramDH * scale); | |
| 366 } else { | |
| 367 expectedSourceSize.setSize( | |
| 368 paramDW * paramWS, | |
| 369 paramDH * paramWS); | |
| 100 | 370 } |
| 371 | |
| 122 | 372 /* |
| 373 * select a resolution | |
| 374 */ | |
| 375 if (autoRes) { | |
| 130 | 376 // autores: use next higher resolution |
| 122 | 377 fileToLoad = |
| 378 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 379 if (fileToLoad == null) { | |
| 130 | 380 // this is the highest we have |
| 122 | 381 fileToLoad = fileset.get(0); |
| 382 } | |
| 86 | 383 } else { |
| 122 | 384 // enforced hires or lores |
| 385 if (hiresOnly) { | |
| 386 // get first element | |
| 387 fileToLoad = fileset.get(0); | |
| 388 } else { | |
| 389 // enforced lores uses next smaller resolution | |
| 390 fileToLoad = | |
| 391 fileset.getNextSmaller(expectedSourceSize, docuInfo); | |
| 392 if (fileToLoad == null) { | |
| 393 // this is the smallest we have | |
| 394 fileToLoad = fileset.get(fileset.size() - 1); | |
| 395 } | |
| 396 } | |
| 86 | 397 } |
| 398 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 399 |
| 130 | 400 if (absoluteScale) { |
| 401 // get original resolution from metadata | |
| 402 fileset.checkMeta(); | |
| 403 origResX = fileset.getResX(); | |
| 404 origResY = fileset.getResY(); | |
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405 if ((origResX == 0) || (origResY == 0)) { |
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406 throw new ImageOpException("Missing image DPI information!"); |
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407 } |
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408 |
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409 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
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410 throw new ImageOpException("Missing display DPI information!"); |
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411 } |
| 130 | 412 } |
| 413 | |
| 86 | 414 // check the source image |
| 122 | 415 if (!fileToLoad.isChecked()) { |
| 416 fileToLoad.check(docuInfo); | |
| 417 } | |
| 86 | 418 // get the source image type |
| 419 mimeType = fileToLoad.getMimetype(); | |
| 130 | 420 // decide if the image can be sent as is |
| 421 boolean mimetypeSendable = | |
| 122 | 422 mimeType.equals("image/jpeg") |
| 423 || mimeType.equals("image/png") | |
| 424 || mimeType.equals("image/gif"); | |
| 130 | 425 boolean imagoOptions = |
| 426 dlRequest.isOption("hmir") | |
| 427 || dlRequest.isOption("vmir") | |
| 428 || (paramROT != 0) | |
| 429 || (paramRGBM != null) | |
| 430 || (paramRGBA != null) | |
| 431 || (paramCONT != 0) | |
| 432 || (paramBRGT != 0); | |
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433 boolean imageSendable = mimetypeSendable && !imagoOptions; |
| 73 | 434 |
| 122 | 435 /* if not autoRes and image smaller than requested |
| 436 * size then send as is. | |
| 100 | 437 * if not autoScale and not scaleToFit nor cropToFit |
| 122 | 438 * then send as is (mo=file) |
| 73 | 439 */ |
| 122 | 440 if ((!autoRes |
| 441 && imageSendable | |
| 442 && (fileToLoad.getSize().width <= expectedSourceSize.width) | |
| 443 && (fileToLoad.getSize().height <= expectedSourceSize.height)) | |
| 130 | 444 || (!autoRes && !scaleToFit && !cropToFit && !absoluteScale)) { |
| 73 | 445 |
| 446 util.dprintln(1, "Sending File as is."); | |
| 1 | 447 |
| 86 | 448 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 449 |
| 73 | 450 util.dprintln( |
| 451 1, | |
| 452 "Done in " | |
| 453 + (System.currentTimeMillis() - startTime) | |
| 454 + "ms"); | |
| 455 return; | |
| 456 } | |
| 1 | 457 |
| 73 | 458 /* |
| 459 * crop and scale the image | |
| 460 */ | |
| 1 | 461 |
| 86 | 462 int imgWidth = 0; |
| 463 int imgHeight = 0; | |
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464 // get image size |
| 86 | 465 if (fileToLoad.getSize() == null) { |
| 466 // size unknown so far | |
| 467 imgWidth = docuImage.getWidth(); | |
| 468 imgHeight = docuImage.getHeight(); | |
| 469 // remember size | |
| 470 fileToLoad.setSize(new Dimension(imgWidth, imgHeight)); | |
| 471 } else { | |
| 472 imgWidth = fileToLoad.getSize().width; | |
| 473 imgHeight = fileToLoad.getSize().height; | |
| 474 } | |
| 94 | 475 |
| 73 | 476 util.dprintln(2, "IMG: " + imgWidth + "x" + imgHeight); |
| 477 util.dprintln( | |
| 478 2, | |
| 479 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 480 |
| 73 | 481 // coordinates and scaling |
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482 double areaXoff; |
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483 double areaYoff; |
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484 double areaWidth; |
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485 double areaHeight; |
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486 double scaleX; |
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487 double scaleY; |
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488 double scaleXY; |
| 1 | 489 |
| 100 | 490 // coordinates using Java2D |
| 491 // image size in pixels | |
| 492 Rectangle2D imgBounds = | |
| 493 new Rectangle2D.Double(0, 0, imgWidth, imgHeight); | |
| 494 // user window area in [0,1] coordinates | |
| 495 Rectangle2D relUserArea = | |
| 496 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 497 // transform from relative [0,1] to image coordinates. | |
| 498 AffineTransform imgTrafo = | |
| 499 AffineTransform.getScaleInstance(imgWidth, imgHeight); | |
| 85 | 500 // transform user coordinate area to image coordinate area |
| 100 | 501 Rectangle2D userImgArea = |
| 502 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 503 | |
| 504 // calculate scaling factors based on inner user area | |
| 73 | 505 if (scaleToFit) { |
| 100 | 506 areaWidth = userImgArea.getWidth(); |
| 507 areaHeight = userImgArea.getHeight(); | |
| 73 | 508 scaleX = paramDW / areaWidth * paramWS; |
| 509 scaleY = paramDH / areaHeight * paramWS; | |
| 510 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 511 } else if (absoluteScale) { |
| 512 // absolute scale | |
| 130 | 513 scaleX = paramDDPIX / origResX; |
| 514 scaleY = paramDDPIY / origResY; | |
| 515 // currently only same scale :-( | |
| 516 scaleXY = scaleX; | |
| 517 areaWidth = paramDW / scaleXY * paramWS; | |
| 518 areaHeight = paramDH / scaleXY * paramWS; | |
| 100 | 519 // reset user area size |
| 520 userImgArea.setRect( | |
| 521 userImgArea.getX(), | |
| 522 userImgArea.getY(), | |
| 523 areaWidth, | |
| 524 areaHeight); | |
| 73 | 525 } else { |
| 526 // crop to fit | |
| 85 | 527 areaWidth = paramDW * paramWS; |
| 528 areaHeight = paramDH * paramWS; | |
| 100 | 529 // reset user area size |
| 530 userImgArea.setRect( | |
| 531 userImgArea.getX(), | |
| 532 userImgArea.getY(), | |
| 533 areaWidth, | |
| 534 areaHeight); | |
| 73 | 535 scaleX = 1f; |
| 536 scaleY = 1f; | |
| 537 scaleXY = 1f; | |
| 100 | 538 } |
| 85 | 539 |
| 100 | 540 // enlarge image area for rotations to cover additional pixels |
| 541 Rectangle2D outerUserImgArea = userImgArea; | |
| 542 Rectangle2D innerUserImgArea = userImgArea; | |
| 543 if (wholeRotArea) { | |
| 544 if (paramROT != 0) { | |
| 545 try { | |
| 546 // rotate user area coordinates around center of user area | |
| 547 AffineTransform rotTrafo = | |
| 548 AffineTransform.getRotateInstance( | |
| 549 Math.toRadians(paramROT), | |
| 550 userImgArea.getCenterX(), | |
| 551 userImgArea.getCenterY()); | |
| 552 // get bounds from rotated end position | |
| 553 innerUserImgArea = | |
| 554 rotTrafo | |
| 555 .createTransformedShape(userImgArea) | |
| 556 .getBounds2D(); | |
| 557 // get bounds from back-rotated bounds | |
| 558 outerUserImgArea = | |
| 559 rotTrafo | |
| 560 .createInverse() | |
| 561 .createTransformedShape(innerUserImgArea) | |
| 562 .getBounds2D(); | |
| 563 } catch (NoninvertibleTransformException e1) { | |
| 564 // this shouldn't happen anyway | |
| 565 e1.printStackTrace(); | |
| 566 } | |
| 567 } | |
| 73 | 568 } |
| 1 | 569 |
| 73 | 570 util.dprintln( |
| 571 1, | |
| 572 "Scale " | |
| 573 + scaleXY | |
| 574 + "(" | |
| 575 + scaleX | |
| 576 + "," | |
| 577 + scaleY | |
| 578 + ") on " | |
| 100 | 579 + outerUserImgArea); |
| 1 | 580 |
| 73 | 581 // clip area at the image border |
| 100 | 582 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
| 85 | 583 |
| 100 | 584 areaWidth = outerUserImgArea.getWidth(); |
| 585 areaHeight = outerUserImgArea.getHeight(); | |
| 586 areaXoff = outerUserImgArea.getX(); | |
| 587 areaYoff = outerUserImgArea.getY(); | |
| 1 | 588 |
| 73 | 589 util.dprintln( |
| 590 2, | |
| 85 | 591 "crop: " |
| 73 | 592 + areaXoff |
| 593 + "," | |
| 594 + areaYoff | |
| 595 + " " | |
| 596 + areaWidth | |
| 597 + "x" | |
| 598 + areaHeight); | |
| 1 | 599 |
| 73 | 600 // check image parameters sanity |
| 601 if ((areaWidth < 1) | |
| 602 || (areaHeight < 1) | |
| 603 || (scaleXY * areaWidth < 2) | |
| 604 || (scaleXY * areaHeight < 2)) { | |
| 605 util.dprintln(1, "ERROR: invalid scale parameter set!"); | |
| 606 throw new ImageOpException("Invalid scale parameter set!"); | |
| 607 } | |
| 1 | 608 |
| 85 | 609 /* |
| 610 * crop and scale image | |
| 611 */ | |
| 612 | |
| 613 // use subimage loading if possible | |
| 614 if (docuImage.isSubimageSupported()) { | |
| 615 System.out.println( | |
| 616 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 617 double subf = 1d; | |
| 618 double subsamp = 1d; | |
| 619 if (scaleXY < 1) { | |
| 620 subf = 1 / scaleXY; | |
| 140 | 621 // for higher quality reduce subsample factor by minSubsample |
| 622 if (scaleQual > 0) { | |
| 623 subsamp = | |
| 624 Math.max( | |
| 625 Math.floor(subf / dlConfig.getMinSubsample()), | |
| 626 1d); | |
| 627 } else { | |
| 628 subsamp = Math.floor(subf); | |
| 629 } | |
| 85 | 630 scaleXY = subsamp / subf; |
| 631 System.out.println( | |
| 632 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 633 } | |
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634 |
| 85 | 635 docuImage.loadSubimage( |
| 86 | 636 fileToLoad.getFile(), |
| 100 | 637 outerUserImgArea.getBounds(), |
| 85 | 638 (int) subsamp); |
| 639 | |
| 640 System.out.println( | |
| 641 "SUBSAMP: " | |
| 642 + subsamp | |
| 643 + " -> " | |
| 644 + docuImage.getWidth() | |
| 645 + "x" | |
| 646 + docuImage.getHeight()); | |
| 647 | |
| 648 docuImage.scale(scaleXY); | |
| 649 | |
| 650 } else { | |
| 100 | 651 // else load and crop the whole file |
| 86 | 652 docuImage.loadImage(fileToLoad.getFile()); |
| 85 | 653 docuImage.crop( |
| 654 (int) areaXoff, | |
| 655 (int) areaYoff, | |
| 656 (int) areaWidth, | |
| 657 (int) areaHeight); | |
| 658 | |
| 659 docuImage.scale(scaleXY); | |
| 660 } | |
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661 |
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662 // mirror image |
| 100 | 663 // operation mode: "hmir": mirror horizontally, "vmir": mirror vertically |
| 664 if (dlRequest.isOption("hmir")) { | |
| 665 docuImage.mirror(0); | |
| 666 } | |
| 667 if (dlRequest.isOption("vmir")) { | |
| 668 docuImage.mirror(90); | |
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669 } |
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670 |
| 100 | 671 // rotate image |
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672 if (paramROT != 0) { |
| 94 | 673 docuImage.rotate(paramROT); |
| 100 | 674 if (wholeRotArea) { |
| 675 // crop to the inner bounding box | |
| 676 double xcrop = | |
| 677 docuImage.getWidth() | |
| 678 - innerUserImgArea.getWidth() * scaleXY; | |
| 679 double ycrop = | |
| 680 docuImage.getHeight() | |
| 681 - innerUserImgArea.getHeight() * scaleXY; | |
| 682 if ((xcrop > 0) || (ycrop > 0)) { | |
| 683 // only crop smaller | |
| 684 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 685 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 686 // crop image | |
| 687 docuImage.crop( | |
| 688 (int) (xcrop / 2), | |
| 689 (int) (ycrop / 2), | |
| 690 (int) (docuImage.getWidth() - xcrop), | |
| 691 (int) (docuImage.getHeight() - ycrop)); | |
| 692 } | |
| 693 } | |
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694 |
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695 } |
| 1 | 696 |
| 86 | 697 // color modification |
| 698 if ((paramRGBM != null) || (paramRGBA != null)) { | |
| 699 // make shure we actually have two arrays | |
| 700 if (paramRGBM == null) { | |
| 701 paramRGBM = new float[3]; | |
| 702 } | |
| 703 if (paramRGBA == null) { | |
| 704 paramRGBA = new float[3]; | |
| 705 } | |
| 100 | 706 // calculate "contrast" values (c=2^x) |
| 86 | 707 float[] mult = new float[3]; |
| 708 for (int i = 0; i < 3; i++) { | |
| 94 | 709 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 710 } |
| 711 docuImage.enhanceRGB(mult, paramRGBA); | |
| 712 } | |
| 94 | 713 |
| 100 | 714 // contrast and brightness enhancement |
| 715 if ((paramCONT != 0) || (paramBRGT != 0)) { | |
| 716 double mult = Math.pow(2, paramCONT); | |
| 717 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 718 } | |
| 719 | |
| 73 | 720 util.dprintln( |
| 721 2, | |
| 722 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 723 | |
| 724 /* | |
| 725 * write the resulting image | |
| 726 */ | |
| 1 | 727 |
| 73 | 728 // setup output -- if source is JPG then dest will be JPG else it's PNG |
| 100 | 729 if (mimeType.equals("image/jpeg") |
| 730 || mimeType.equals("image/jp2")) { | |
| 731 mimeType = "image/jpeg"; | |
| 732 } else { | |
| 73 | 733 mimeType = "image/png"; |
| 734 } | |
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735 response.setContentType(mimeType); |
| 1 | 736 |
| 73 | 737 // write the image |
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738 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 739 |
| 73 | 740 util.dprintln( |
| 741 1, | |
| 742 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 743 | |
| 744 /* | |
| 745 * error handling | |
| 746 */ | |
| 1 | 747 |
| 73 | 748 } // end of "big" try |
| 749 catch (FileOpException e) { | |
| 750 util.dprintln(1, "ERROR: File IO Error: " + e); | |
| 751 try { | |
| 752 if (errorMsgHtml) { | |
| 753 ServletOps.htmlMessage( | |
| 754 "ERROR: File IO Error: " + e, | |
| 755 response); | |
| 756 } else { | |
| 757 servletOp.sendFile( | |
| 758 new File(dlConfig.getErrorImgFileName()), | |
| 759 response); | |
| 760 } | |
| 761 } catch (FileOpException ex) { | |
| 762 } // so we don't get a loop | |
| 763 return; | |
| 764 } catch (AuthOpException e) { | |
| 765 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 766 try { | |
| 767 if (errorMsgHtml) { | |
| 768 ServletOps.htmlMessage( | |
| 769 "ERROR: Authorization error: " + e, | |
| 770 response); | |
| 771 } else { | |
| 772 servletOp.sendFile( | |
| 773 new File(dlConfig.getErrorImgFileName()), | |
| 774 response); | |
| 775 } | |
| 776 } catch (FileOpException ex) { | |
| 777 } // so we don't get a loop | |
| 778 return; | |
| 779 } catch (ImageOpException e) { | |
| 780 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 781 try { | |
| 782 if (errorMsgHtml) { | |
| 783 ServletOps.htmlMessage( | |
| 784 "ERROR: Image Operation Error: " + e, | |
| 785 response); | |
| 786 } else { | |
| 787 servletOp.sendFile( | |
| 788 new File(dlConfig.getErrorImgFileName()), | |
| 789 response); | |
| 790 } | |
| 791 } catch (FileOpException ex) { | |
| 792 } // so we don't get a loop | |
| 793 return; | |
| 794 } catch (RuntimeException e) { | |
| 795 // JAI likes to throw RuntimeExceptions ;-( | |
| 796 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 797 try { | |
| 798 if (errorMsgHtml) { | |
| 799 ServletOps.htmlMessage( | |
| 800 "ERROR: Other Image Operation Error: " + e, | |
| 801 response); | |
| 802 } else { | |
| 803 servletOp.sendFile( | |
| 804 new File(dlConfig.getErrorImgFileName()), | |
| 805 response); | |
| 806 } | |
| 807 } catch (FileOpException ex) { | |
| 808 } // so we don't get a loop | |
| 809 return; | |
| 810 } | |
| 811 } | |
| 1 | 812 |
| 73 | 813 } //Scaler class |