Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 148:837a633a0407
fixed bugs when using lots of prescaled images
| author | robcast |
|---|---|
| date | Fri, 22 Aug 2003 21:12:24 +0200 |
| parents | bdd6789d21e0 |
| children | 04ad64b2137a |
| 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) |
| 148 | 61 public static final String dlVersion = "1.13a2"; |
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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; | |
| 179 // try different resolution images automatically | |
| 180 boolean autoRes = true; | |
| 181 // use hires images (if autoRes == false) | |
| 182 boolean hiresOnly = false; | |
| 73 | 183 // interpolation to use for scaling |
| 142 | 184 int scaleQual = 1; |
| 73 | 185 // send html error message (or image file) |
| 186 boolean errorMsgHtml = false; | |
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187 // mirror the image |
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188 boolean doMirror = false; |
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189 // angle of mirror axis |
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190 double mirrorAngle = 0; |
| 130 | 191 // original (hires) image resolution |
| 192 double origResX = 0; | |
| 193 double origResY = 0; | |
| 1 | 194 |
| 73 | 195 /* |
| 196 * request parameters | |
| 197 */ | |
| 198 | |
| 199 DigilibRequest dlRequest = | |
| 200 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 201 |
| 73 | 202 // destination image width |
| 203 int paramDW = dlRequest.getDw(); | |
| 204 // destination image height | |
| 205 int paramDH = dlRequest.getDh(); | |
| 122 | 206 // dw and dh shouldn't be empty, if they are, set dw=dh |
| 207 if (paramDW <= 0) { | |
| 208 paramDW = paramDH; | |
| 209 } | |
| 210 if (paramDH <= 0) { | |
| 211 paramDH = paramDW; | |
| 212 } | |
| 73 | 213 // relative area x_offset (0..1) |
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214 double paramWX = dlRequest.getWx(); |
| 73 | 215 // relative area y_offset |
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216 double paramWY = dlRequest.getWy(); |
| 73 | 217 // relative area width (0..1) |
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218 double paramWW = dlRequest.getWw(); |
| 73 | 219 // relative area height |
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220 double paramWH = dlRequest.getWh(); |
| 73 | 221 // scale factor (additional to dw/width, dh/height) |
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222 double paramWS = dlRequest.getWs(); |
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223 // rotation angle |
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224 double paramROT = dlRequest.getRot(); |
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225 // contrast enhancement |
| 86 | 226 float paramCONT = dlRequest.getCont(); |
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227 // brightness enhancement |
| 86 | 228 float paramBRGT = dlRequest.getBrgt(); |
| 229 // color modification | |
| 230 float[] paramRGBM = dlRequest.getRgbm(); | |
| 231 float[] paramRGBA = dlRequest.getRgba(); | |
| 130 | 232 // destination resolution (DPI) |
| 233 float paramDDPIX = dlRequest.getDdpix(); | |
| 234 float paramDDPIY = dlRequest.getDdpiy(); | |
| 235 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
| 236 // if X or Y resolution isn't set, use DDPI | |
| 237 paramDDPIX = dlRequest.getDdpi(); | |
| 238 paramDDPIY = dlRequest.getDdpi(); | |
| 239 } | |
| 1 | 240 |
| 73 | 241 /* operation mode: "fit": always fit to page, |
| 242 * "clip": send original resolution cropped, "file": send whole file (if | |
| 243 * allowed) | |
| 244 */ | |
| 245 if (dlRequest.isOption("clip")) { | |
| 246 scaleToFit = false; | |
| 100 | 247 absoluteScale = false; |
| 73 | 248 cropToFit = true; |
| 122 | 249 autoRes = true; |
| 73 | 250 } else if (dlRequest.isOption("fit")) { |
| 251 scaleToFit = true; | |
| 100 | 252 absoluteScale = false; |
| 122 | 253 cropToFit = false; |
| 254 autoRes = true; | |
| 130 | 255 } else if (dlRequest.isOption("osize")) { |
| 100 | 256 scaleToFit = false; |
| 257 absoluteScale = true; | |
| 122 | 258 cropToFit = false; |
| 259 autoRes = false; | |
| 260 hiresOnly = true; | |
| 73 | 261 } else if (dlRequest.isOption("file")) { |
| 262 scaleToFit = false; | |
| 100 | 263 absoluteScale = false; |
| 73 | 264 if (dlConfig.isSendFileAllowed()) { |
| 265 cropToFit = false; | |
| 266 } else { | |
| 122 | 267 // crop to fit if send file not allowed |
| 73 | 268 cropToFit = true; |
| 269 } | |
| 122 | 270 autoRes = false; |
| 271 hiresOnly = true; | |
| 73 | 272 } |
| 273 // operation mode: "errtxt": error message in html, "errimg": error image | |
| 274 if (dlRequest.isOption("errtxt")) { | |
| 275 errorMsgHtml = true; | |
| 276 } else if (dlRequest.isOption("errimg")) { | |
| 277 errorMsgHtml = false; | |
| 278 } | |
| 279 // operation mode: "q0" - "q2": interpolation quality | |
| 280 if (dlRequest.isOption("q0")) { | |
| 281 scaleQual = 0; | |
| 282 } else if (dlRequest.isOption("q1")) { | |
| 283 scaleQual = 1; | |
| 284 } else if (dlRequest.isOption("q2")) { | |
| 285 scaleQual = 2; | |
| 286 } | |
| 287 // operation mode: "lores": try to use scaled image, "hires": use unscaled image | |
| 122 | 288 // "autores": try best fitting resolution |
| 73 | 289 if (dlRequest.isOption("lores")) { |
| 122 | 290 autoRes = false; |
| 291 hiresOnly = false; | |
| 73 | 292 } else if (dlRequest.isOption("hires")) { |
| 122 | 293 autoRes = false; |
| 294 hiresOnly = true; | |
| 295 } else if (dlRequest.isOption("autores")) { | |
| 296 autoRes = true; | |
| 73 | 297 } |
| 1 | 298 |
| 73 | 299 //"big" try for all file/image actions |
| 300 try { | |
| 301 | |
| 86 | 302 // new DocuImage instance |
| 73 | 303 DocuImage docuImage = dlConfig.getDocuImageInstance(); |
| 304 if (docuImage == null) { | |
| 305 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 306 } | |
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307 |
| 122 | 308 // new DocuInfo instance |
| 309 DocuInfo docuInfo = new ImageLoaderDocuInfo(); | |
| 310 | |
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311 // set interpolation quality |
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312 docuImage.setQuality(scaleQual); |
| 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; |
| 94 | 350 DocuFileset fileset = |
| 351 dirCache.getFileset(loadPathName, dlRequest.getPn()); | |
| 352 if (fileset == null) { | |
| 353 throw new FileOpException( | |
| 354 "File " | |
| 355 + loadPathName | |
| 356 + "(" | |
| 357 + dlRequest.getPn() | |
| 358 + ") not found."); | |
| 359 } | |
| 360 | |
| 122 | 361 /* |
| 362 * calculate expected source image size | |
| 363 * | |
| 364 */ | |
| 365 Dimension expectedSourceSize = new Dimension(); | |
| 366 if (scaleToFit) { | |
| 367 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 368 expectedSourceSize.setSize(paramDW * scale, paramDH * scale); | |
| 369 } else { | |
| 370 expectedSourceSize.setSize( | |
| 371 paramDW * paramWS, | |
| 372 paramDH * paramWS); | |
| 100 | 373 } |
| 374 | |
| 122 | 375 /* |
| 376 * select a resolution | |
| 377 */ | |
| 378 if (autoRes) { | |
| 130 | 379 // autores: use next higher resolution |
| 122 | 380 fileToLoad = |
| 381 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 382 if (fileToLoad == null) { | |
| 130 | 383 // this is the highest we have |
| 122 | 384 fileToLoad = fileset.get(0); |
| 385 } | |
| 86 | 386 } else { |
| 122 | 387 // enforced hires or lores |
| 388 if (hiresOnly) { | |
| 389 // get first element | |
| 390 fileToLoad = fileset.get(0); | |
| 391 } else { | |
| 392 // enforced lores uses next smaller resolution | |
| 393 fileToLoad = | |
| 394 fileset.getNextSmaller(expectedSourceSize, docuInfo); | |
| 395 if (fileToLoad == null) { | |
| 396 // this is the smallest we have | |
| 397 fileToLoad = fileset.get(fileset.size() - 1); | |
| 398 } | |
| 399 } | |
| 86 | 400 } |
| 401 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 402 |
| 130 | 403 if (absoluteScale) { |
| 404 // get original resolution from metadata | |
| 405 fileset.checkMeta(); | |
| 406 origResX = fileset.getResX(); | |
| 407 origResY = fileset.getResY(); | |
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408 if ((origResX == 0) || (origResY == 0)) { |
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409 throw new ImageOpException("Missing image DPI information!"); |
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410 } |
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411 |
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412 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
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413 throw new ImageOpException("Missing display DPI information!"); |
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414 } |
| 130 | 415 } |
| 416 | |
| 86 | 417 // check the source image |
| 122 | 418 if (!fileToLoad.isChecked()) { |
| 419 fileToLoad.check(docuInfo); | |
| 420 } | |
| 86 | 421 // get the source image type |
| 422 mimeType = fileToLoad.getMimetype(); | |
| 130 | 423 // decide if the image can be sent as is |
| 424 boolean mimetypeSendable = | |
| 122 | 425 mimeType.equals("image/jpeg") |
| 426 || mimeType.equals("image/png") | |
| 427 || mimeType.equals("image/gif"); | |
| 130 | 428 boolean imagoOptions = |
| 429 dlRequest.isOption("hmir") | |
| 430 || dlRequest.isOption("vmir") | |
| 431 || (paramROT != 0) | |
| 432 || (paramRGBM != null) | |
| 433 || (paramRGBA != null) | |
| 434 || (paramCONT != 0) | |
| 435 || (paramBRGT != 0); | |
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436 boolean imageSendable = mimetypeSendable && !imagoOptions; |
| 73 | 437 |
| 122 | 438 /* if not autoRes and image smaller than requested |
| 147 | 439 * size then send as is. |
| 440 * if autoRes and image has requested size then send as is. | |
| 100 | 441 * if not autoScale and not scaleToFit nor cropToFit |
| 122 | 442 * then send as is (mo=file) |
| 73 | 443 */ |
| 122 | 444 if ((!autoRes |
| 445 && imageSendable | |
| 446 && (fileToLoad.getSize().width <= expectedSourceSize.width) | |
| 447 && (fileToLoad.getSize().height <= expectedSourceSize.height)) | |
| 147 | 448 || (autoRes |
| 449 && ((fileToLoad.getSize().width == expectedSourceSize.width) | |
| 148 | 450 && (fileToLoad.getSize().height <= expectedSourceSize.height))) |
| 147 | 451 || (autoRes |
| 452 && ((fileToLoad.getSize().width <= expectedSourceSize.width) | |
| 148 | 453 && (fileToLoad.getSize().height == expectedSourceSize.height))) |
| 130 | 454 || (!autoRes && !scaleToFit && !cropToFit && !absoluteScale)) { |
| 73 | 455 |
| 456 util.dprintln(1, "Sending File as is."); | |
| 1 | 457 |
| 86 | 458 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 459 |
| 73 | 460 util.dprintln( |
| 461 1, | |
| 462 "Done in " | |
| 463 + (System.currentTimeMillis() - startTime) | |
| 464 + "ms"); | |
| 465 return; | |
| 466 } | |
| 1 | 467 |
| 73 | 468 /* |
| 469 * crop and scale the image | |
| 470 */ | |
| 1 | 471 |
| 86 | 472 int imgWidth = 0; |
| 473 int imgHeight = 0; | |
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474 // get image size |
| 86 | 475 if (fileToLoad.getSize() == null) { |
| 476 // size unknown so far | |
| 477 imgWidth = docuImage.getWidth(); | |
| 478 imgHeight = docuImage.getHeight(); | |
| 479 // remember size | |
| 480 fileToLoad.setSize(new Dimension(imgWidth, imgHeight)); | |
| 481 } else { | |
| 482 imgWidth = fileToLoad.getSize().width; | |
| 483 imgHeight = fileToLoad.getSize().height; | |
| 484 } | |
| 94 | 485 |
| 73 | 486 util.dprintln(2, "IMG: " + imgWidth + "x" + imgHeight); |
| 487 util.dprintln( | |
| 488 2, | |
| 489 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 490 |
| 73 | 491 // coordinates and scaling |
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492 double areaXoff; |
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493 double areaYoff; |
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494 double areaWidth; |
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495 double areaHeight; |
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496 double scaleX; |
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497 double scaleY; |
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498 double scaleXY; |
| 1 | 499 |
| 100 | 500 // coordinates using Java2D |
| 501 // image size in pixels | |
| 502 Rectangle2D imgBounds = | |
| 503 new Rectangle2D.Double(0, 0, imgWidth, imgHeight); | |
| 504 // user window area in [0,1] coordinates | |
| 505 Rectangle2D relUserArea = | |
| 506 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 507 // transform from relative [0,1] to image coordinates. | |
| 508 AffineTransform imgTrafo = | |
| 509 AffineTransform.getScaleInstance(imgWidth, imgHeight); | |
| 85 | 510 // transform user coordinate area to image coordinate area |
| 100 | 511 Rectangle2D userImgArea = |
| 512 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 513 | |
| 514 // calculate scaling factors based on inner user area | |
| 73 | 515 if (scaleToFit) { |
| 100 | 516 areaWidth = userImgArea.getWidth(); |
| 517 areaHeight = userImgArea.getHeight(); | |
| 73 | 518 scaleX = paramDW / areaWidth * paramWS; |
| 519 scaleY = paramDH / areaHeight * paramWS; | |
| 520 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 521 } else if (absoluteScale) { |
| 522 // absolute scale | |
| 130 | 523 scaleX = paramDDPIX / origResX; |
| 524 scaleY = paramDDPIY / origResY; | |
| 525 // currently only same scale :-( | |
| 526 scaleXY = scaleX; | |
| 527 areaWidth = paramDW / scaleXY * paramWS; | |
| 528 areaHeight = paramDH / scaleXY * paramWS; | |
| 100 | 529 // reset user area size |
| 530 userImgArea.setRect( | |
| 531 userImgArea.getX(), | |
| 532 userImgArea.getY(), | |
| 533 areaWidth, | |
| 534 areaHeight); | |
| 73 | 535 } else { |
| 536 // crop to fit | |
| 85 | 537 areaWidth = paramDW * paramWS; |
| 538 areaHeight = paramDH * paramWS; | |
| 100 | 539 // reset user area size |
| 540 userImgArea.setRect( | |
| 541 userImgArea.getX(), | |
| 542 userImgArea.getY(), | |
| 543 areaWidth, | |
| 544 areaHeight); | |
| 73 | 545 scaleX = 1f; |
| 546 scaleY = 1f; | |
| 547 scaleXY = 1f; | |
| 100 | 548 } |
| 85 | 549 |
| 100 | 550 // enlarge image area for rotations to cover additional pixels |
| 551 Rectangle2D outerUserImgArea = userImgArea; | |
| 552 Rectangle2D innerUserImgArea = userImgArea; | |
| 553 if (wholeRotArea) { | |
| 554 if (paramROT != 0) { | |
| 555 try { | |
| 556 // rotate user area coordinates around center of user area | |
| 557 AffineTransform rotTrafo = | |
| 558 AffineTransform.getRotateInstance( | |
| 559 Math.toRadians(paramROT), | |
| 560 userImgArea.getCenterX(), | |
| 561 userImgArea.getCenterY()); | |
| 562 // get bounds from rotated end position | |
| 563 innerUserImgArea = | |
| 564 rotTrafo | |
| 565 .createTransformedShape(userImgArea) | |
| 566 .getBounds2D(); | |
| 567 // get bounds from back-rotated bounds | |
| 568 outerUserImgArea = | |
| 569 rotTrafo | |
| 570 .createInverse() | |
| 571 .createTransformedShape(innerUserImgArea) | |
| 572 .getBounds2D(); | |
| 573 } catch (NoninvertibleTransformException e1) { | |
| 574 // this shouldn't happen anyway | |
| 575 e1.printStackTrace(); | |
| 576 } | |
| 577 } | |
| 73 | 578 } |
| 1 | 579 |
| 73 | 580 util.dprintln( |
| 581 1, | |
| 582 "Scale " | |
| 583 + scaleXY | |
| 584 + "(" | |
| 585 + scaleX | |
| 586 + "," | |
| 587 + scaleY | |
| 588 + ") on " | |
| 100 | 589 + outerUserImgArea); |
| 1 | 590 |
| 73 | 591 // clip area at the image border |
| 100 | 592 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
| 85 | 593 |
| 100 | 594 areaWidth = outerUserImgArea.getWidth(); |
| 595 areaHeight = outerUserImgArea.getHeight(); | |
| 596 areaXoff = outerUserImgArea.getX(); | |
| 597 areaYoff = outerUserImgArea.getY(); | |
| 1 | 598 |
| 73 | 599 util.dprintln( |
| 600 2, | |
| 85 | 601 "crop: " |
| 73 | 602 + areaXoff |
| 603 + "," | |
| 604 + areaYoff | |
| 605 + " " | |
| 606 + areaWidth | |
| 607 + "x" | |
| 608 + areaHeight); | |
| 1 | 609 |
| 73 | 610 // check image parameters sanity |
| 611 if ((areaWidth < 1) | |
| 612 || (areaHeight < 1) | |
| 613 || (scaleXY * areaWidth < 2) | |
| 614 || (scaleXY * areaHeight < 2)) { | |
| 615 util.dprintln(1, "ERROR: invalid scale parameter set!"); | |
| 616 throw new ImageOpException("Invalid scale parameter set!"); | |
| 617 } | |
| 1 | 618 |
| 85 | 619 /* |
| 620 * crop and scale image | |
| 621 */ | |
| 622 | |
| 623 // use subimage loading if possible | |
| 624 if (docuImage.isSubimageSupported()) { | |
| 625 System.out.println( | |
| 626 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 627 double subf = 1d; | |
| 628 double subsamp = 1d; | |
| 629 if (scaleXY < 1) { | |
| 630 subf = 1 / scaleXY; | |
| 140 | 631 // for higher quality reduce subsample factor by minSubsample |
| 632 if (scaleQual > 0) { | |
| 633 subsamp = | |
| 634 Math.max( | |
| 635 Math.floor(subf / dlConfig.getMinSubsample()), | |
| 636 1d); | |
| 637 } else { | |
| 638 subsamp = Math.floor(subf); | |
| 639 } | |
| 85 | 640 scaleXY = subsamp / subf; |
| 641 System.out.println( | |
| 642 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 643 } | |
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644 |
| 85 | 645 docuImage.loadSubimage( |
| 86 | 646 fileToLoad.getFile(), |
| 100 | 647 outerUserImgArea.getBounds(), |
| 85 | 648 (int) subsamp); |
| 649 | |
| 650 System.out.println( | |
| 651 "SUBSAMP: " | |
| 652 + subsamp | |
| 653 + " -> " | |
| 654 + docuImage.getWidth() | |
| 655 + "x" | |
| 656 + docuImage.getHeight()); | |
| 657 | |
| 658 docuImage.scale(scaleXY); | |
| 659 | |
| 660 } else { | |
| 100 | 661 // else load and crop the whole file |
| 86 | 662 docuImage.loadImage(fileToLoad.getFile()); |
| 85 | 663 docuImage.crop( |
| 664 (int) areaXoff, | |
| 665 (int) areaYoff, | |
| 666 (int) areaWidth, | |
| 667 (int) areaHeight); | |
| 668 | |
| 669 docuImage.scale(scaleXY); | |
| 670 } | |
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671 |
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672 // mirror image |
| 100 | 673 // operation mode: "hmir": mirror horizontally, "vmir": mirror vertically |
| 674 if (dlRequest.isOption("hmir")) { | |
| 675 docuImage.mirror(0); | |
| 676 } | |
| 677 if (dlRequest.isOption("vmir")) { | |
| 678 docuImage.mirror(90); | |
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679 } |
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680 |
| 100 | 681 // rotate image |
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682 if (paramROT != 0) { |
| 94 | 683 docuImage.rotate(paramROT); |
| 100 | 684 if (wholeRotArea) { |
| 685 // crop to the inner bounding box | |
| 686 double xcrop = | |
| 687 docuImage.getWidth() | |
| 688 - innerUserImgArea.getWidth() * scaleXY; | |
| 689 double ycrop = | |
| 690 docuImage.getHeight() | |
| 691 - innerUserImgArea.getHeight() * scaleXY; | |
| 692 if ((xcrop > 0) || (ycrop > 0)) { | |
| 693 // only crop smaller | |
| 694 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 695 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 696 // crop image | |
| 697 docuImage.crop( | |
| 698 (int) (xcrop / 2), | |
| 699 (int) (ycrop / 2), | |
| 700 (int) (docuImage.getWidth() - xcrop), | |
| 701 (int) (docuImage.getHeight() - ycrop)); | |
| 702 } | |
| 703 } | |
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704 |
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705 } |
| 1 | 706 |
| 86 | 707 // color modification |
| 708 if ((paramRGBM != null) || (paramRGBA != null)) { | |
| 709 // make shure we actually have two arrays | |
| 710 if (paramRGBM == null) { | |
| 711 paramRGBM = new float[3]; | |
| 712 } | |
| 713 if (paramRGBA == null) { | |
| 714 paramRGBA = new float[3]; | |
| 715 } | |
| 100 | 716 // calculate "contrast" values (c=2^x) |
| 86 | 717 float[] mult = new float[3]; |
| 718 for (int i = 0; i < 3; i++) { | |
| 94 | 719 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 720 } |
| 721 docuImage.enhanceRGB(mult, paramRGBA); | |
| 722 } | |
| 94 | 723 |
| 100 | 724 // contrast and brightness enhancement |
| 725 if ((paramCONT != 0) || (paramBRGT != 0)) { | |
| 726 double mult = Math.pow(2, paramCONT); | |
| 727 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 728 } | |
| 729 | |
| 73 | 730 util.dprintln( |
| 731 2, | |
| 732 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 733 | |
| 734 /* | |
| 735 * write the resulting image | |
| 736 */ | |
| 1 | 737 |
| 73 | 738 // setup output -- if source is JPG then dest will be JPG else it's PNG |
| 100 | 739 if (mimeType.equals("image/jpeg") |
| 740 || mimeType.equals("image/jp2")) { | |
| 741 mimeType = "image/jpeg"; | |
| 742 } else { | |
| 73 | 743 mimeType = "image/png"; |
| 744 } | |
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745 response.setContentType(mimeType); |
| 1 | 746 |
| 73 | 747 // write the image |
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748 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 749 |
| 73 | 750 util.dprintln( |
| 751 1, | |
| 752 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 753 | |
| 754 /* | |
| 755 * error handling | |
| 756 */ | |
| 1 | 757 |
| 73 | 758 } // end of "big" try |
| 759 catch (FileOpException e) { | |
| 760 util.dprintln(1, "ERROR: File IO Error: " + e); | |
| 761 try { | |
| 762 if (errorMsgHtml) { | |
| 763 ServletOps.htmlMessage( | |
| 764 "ERROR: File IO Error: " + e, | |
| 765 response); | |
| 766 } else { | |
| 767 servletOp.sendFile( | |
| 768 new File(dlConfig.getErrorImgFileName()), | |
| 769 response); | |
| 770 } | |
| 771 } catch (FileOpException ex) { | |
| 772 } // so we don't get a loop | |
| 773 return; | |
| 774 } catch (AuthOpException e) { | |
| 775 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 776 try { | |
| 777 if (errorMsgHtml) { | |
| 778 ServletOps.htmlMessage( | |
| 779 "ERROR: Authorization error: " + e, | |
| 780 response); | |
| 781 } else { | |
| 782 servletOp.sendFile( | |
| 783 new File(dlConfig.getErrorImgFileName()), | |
| 784 response); | |
| 785 } | |
| 786 } catch (FileOpException ex) { | |
| 787 } // so we don't get a loop | |
| 788 return; | |
| 789 } catch (ImageOpException e) { | |
| 790 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 791 try { | |
| 792 if (errorMsgHtml) { | |
| 793 ServletOps.htmlMessage( | |
| 794 "ERROR: Image Operation Error: " + e, | |
| 795 response); | |
| 796 } else { | |
| 797 servletOp.sendFile( | |
| 798 new File(dlConfig.getErrorImgFileName()), | |
| 799 response); | |
| 800 } | |
| 801 } catch (FileOpException ex) { | |
| 802 } // so we don't get a loop | |
| 803 return; | |
| 804 } catch (RuntimeException e) { | |
| 805 // JAI likes to throw RuntimeExceptions ;-( | |
| 806 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 807 try { | |
| 808 if (errorMsgHtml) { | |
| 809 ServletOps.htmlMessage( | |
| 810 "ERROR: Other Image Operation Error: " + e, | |
| 811 response); | |
| 812 } else { | |
| 813 servletOp.sendFile( | |
| 814 new File(dlConfig.getErrorImgFileName()), | |
| 815 response); | |
| 816 } | |
| 817 } catch (FileOpException ex) { | |
| 818 } // so we don't get a loop | |
| 819 return; | |
| 820 } | |
| 821 } | |
| 1 | 822 |
| 73 | 823 } //Scaler class |