Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 156:688ad0b8b0fa
Servlet version 1.16a2
- fixed problem with tiff images in ImageInfo
| author | robcast |
|---|---|
| date | Wed, 03 Sep 2003 21:06:25 +0200 |
| parents | 4980c969be4c |
| children | ace2a4a0ba74 |
| rev | line source |
|---|---|
| 1 | 1 /* Scaler -- Scaler servlet main class |
| 2 | |
| 3 Digital Image Library servlet components | |
| 4 | |
| 73 | 5 Copyright (C) 2001, 2002, 2003 Robert Casties (robcast@mail.berlios.de) |
| 1 | 6 |
| 7 This program is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Please read license.txt for the full details. A copy of the GPL | |
| 13 may be found at http://www.gnu.org/copyleft/lgpl.html | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program; if not, write to the Free Software | |
| 149 | 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 1 | 18 |
| 19 */ | |
| 20 | |
| 21 package digilib.servlet; | |
| 22 | |
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23 import java.awt.geom.AffineTransform; |
| 100 | 24 import java.awt.geom.NoninvertibleTransformException; |
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25 import java.awt.geom.Rectangle2D; |
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26 import java.io.File; |
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27 import java.io.IOException; |
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28 import java.util.List; |
| 1 | 29 |
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30 import javax.servlet.ServletConfig; |
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31 import javax.servlet.ServletContext; |
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32 import javax.servlet.ServletException; |
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33 import javax.servlet.http.HttpServlet; |
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34 import javax.servlet.http.HttpServletRequest; |
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35 import javax.servlet.http.HttpServletResponse; |
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36 |
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37 import digilib.Utils; |
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38 import digilib.auth.AuthOpException; |
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39 import digilib.auth.AuthOps; |
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40 import digilib.image.DocuImage; |
| 122 | 41 import digilib.image.DocuInfo; |
| 149 | 42 import digilib.image.ImageLoaderImageInfoDocuInfo; |
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43 import digilib.image.ImageOpException; |
| 149 | 44 import digilib.image.ImageSize; |
| 86 | 45 import digilib.io.DocuDirCache; |
| 46 import digilib.io.DocuFile; | |
| 47 import digilib.io.DocuFileset; | |
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48 import digilib.io.FileOpException; |
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49 import digilib.io.FileOps; |
| 1 | 50 |
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51 //import tilecachetool.*; |
| 1 | 52 |
| 73 | 53 /** |
| 54 * @author casties | |
| 55 * | |
| 56 */ | |
| 1 | 57 //public class Scaler extends HttpServlet implements SingleThreadModel { |
| 58 public class Scaler extends HttpServlet { | |
| 59 | |
| 73 | 60 // digilib servlet version (for all components) |
| 156 | 61 public static final String dlVersion = "1.16a2"; |
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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; | |
| 153 | 73 |
| 74 // deny image file | |
| 75 File denyImgFile; | |
| 76 // error image file | |
| 77 File errorImgFile; | |
| 78 // subsampling before scaling | |
| 79 float minSubsample = 2f; | |
| 80 // send files as is? | |
| 81 boolean sendFileAllowed = true; | |
| 82 // default scaling quality | |
| 83 int defaultQuality = 1; | |
| 1 | 84 |
| 94 | 85 // DigilibConfiguration instance |
| 73 | 86 DigilibConfiguration dlConfig; |
| 1 | 87 |
| 73 | 88 // use authorization database |
| 89 boolean useAuthentication = true; | |
| 1 | 90 |
| 100 | 91 // EXPRIMENTAL |
| 92 // try to enlarge cropping area for "oblique" angles | |
| 93 boolean wholeRotArea = false; | |
| 94 | |
| 73 | 95 /** Initialisation on first run. |
| 96 * | |
| 97 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
| 98 */ | |
| 99 public void init(ServletConfig config) throws ServletException { | |
| 100 super.init(config); | |
| 1 | 101 |
| 73 | 102 // Debuggin! |
| 103 //TCTool tctool = new TCTool(); | |
| 153 | 104 |
| 147 | 105 System.out.println( |
| 106 "***** Digital Image Library Servlet (version " | |
| 107 + dlVersion | |
| 108 + ") *****"); | |
| 1 | 109 |
| 73 | 110 // get our ServletContext |
| 111 ServletContext context = config.getServletContext(); | |
| 112 // see if there is a Configuration instance | |
| 113 dlConfig = | |
| 114 (DigilibConfiguration) context.getAttribute( | |
| 86 | 115 "digilib.servlet.configuration"); |
| 73 | 116 if (dlConfig == null) { |
| 117 // create new Configuration | |
| 118 try { | |
| 119 dlConfig = new DigilibConfiguration(config); | |
| 86 | 120 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 121 } catch (Exception e) { |
| 122 throw new ServletException(e); | |
| 123 } | |
| 124 } | |
| 125 // first we need an Utils | |
| 126 util = dlConfig.getUtil(); | |
| 127 // set our AuthOps | |
| 153 | 128 useAuthentication = dlConfig.getAsBoolean("use-authorization"); |
| 129 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op"); | |
| 73 | 130 // FileOps instance |
| 131 fileOp = new FileOps(util); | |
| 132 // AuthOps instance | |
| 133 servletOp = new ServletOps(util); | |
| 86 | 134 // DocuDirCache instance |
| 153 | 135 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache"); |
| 136 denyImgFile = new File(dlConfig.getAsString("denied-image")); | |
| 137 errorImgFile = new File(dlConfig.getAsString("error-image")); | |
| 138 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed"); | |
| 139 minSubsample = dlConfig.getAsFloat("subsample-minimum"); | |
| 140 defaultQuality = dlConfig.getAsInt("default-quality"); | |
| 73 | 141 } |
| 1 | 142 |
| 73 | 143 /** Process the HTTP Get request*/ |
| 144 public void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 145 throws ServletException, IOException { | |
| 146 util.dprintln(1, "The servlet has received a GET!"); | |
| 147 // create new request with defaults | |
| 148 DigilibRequest dlReq = new DigilibRequest(); | |
| 149 // set with request parameters | |
| 150 dlReq.setWithRequest(request); | |
| 151 // add DigilibRequest to ServletRequest | |
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152 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 153 // do the processing |
| 154 processRequest(request, response); | |
| 155 } | |
| 1 | 156 |
| 73 | 157 /**Process the HTTP Post request*/ |
| 158 public void doPost( | |
| 159 HttpServletRequest request, | |
| 160 HttpServletResponse response) | |
| 161 throws ServletException, IOException { | |
| 162 util.dprintln(1, "The servlet has received a POST!"); | |
| 163 // create new request with defaults | |
| 164 DigilibRequest dlReq = new DigilibRequest(); | |
| 165 // set with request parameters | |
| 166 dlReq.setWithRequest(request); | |
| 167 // add DigilibRequest to ServletRequest | |
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168 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 169 // do the processing |
| 170 processRequest(request, response); | |
| 171 } | |
| 172 | |
| 173 /** main request handler. */ | |
| 174 void processRequest( | |
| 175 HttpServletRequest request, | |
| 176 HttpServletResponse response) | |
| 177 throws ServletException, IOException { | |
| 1 | 178 |
| 73 | 179 // time for benchmarking |
| 180 long startTime = System.currentTimeMillis(); | |
| 181 // output mime/type | |
| 182 String mimeType = "image/png"; | |
| 1 | 183 |
| 73 | 184 /* |
| 185 * parameters for a session | |
| 186 */ | |
| 1 | 187 |
| 73 | 188 // scale the image file to fit window size i.e. respect dw,dh |
| 189 boolean scaleToFit = true; | |
| 100 | 190 // scale the image by a fixed factor only |
| 191 boolean absoluteScale = false; | |
| 122 | 192 // only crop the image to fit |
| 193 boolean cropToFit = false; | |
| 149 | 194 // send the file as is |
| 195 boolean sendFile = false; | |
| 196 // use low resolution images only | |
| 197 boolean loresOnly = false; | |
| 198 // use hires images only | |
| 122 | 199 boolean hiresOnly = false; |
| 73 | 200 // interpolation to use for scaling |
| 153 | 201 int scaleQual = defaultQuality; |
| 73 | 202 // send html error message (or image file) |
| 203 boolean errorMsgHtml = false; | |
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204 // mirror the image |
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205 boolean doMirror = false; |
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206 // angle of mirror axis |
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207 double mirrorAngle = 0; |
| 130 | 208 // original (hires) image resolution |
| 209 double origResX = 0; | |
| 210 double origResY = 0; | |
| 1 | 211 |
| 73 | 212 /* |
| 213 * request parameters | |
| 214 */ | |
| 215 | |
| 216 DigilibRequest dlRequest = | |
| 217 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 218 |
| 73 | 219 // destination image width |
| 220 int paramDW = dlRequest.getDw(); | |
| 221 // destination image height | |
| 222 int paramDH = dlRequest.getDh(); | |
| 122 | 223 // dw and dh shouldn't be empty, if they are, set dw=dh |
| 224 if (paramDW <= 0) { | |
| 225 paramDW = paramDH; | |
| 226 } | |
| 227 if (paramDH <= 0) { | |
| 228 paramDH = paramDW; | |
| 229 } | |
| 73 | 230 // relative area x_offset (0..1) |
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231 double paramWX = dlRequest.getWx(); |
| 73 | 232 // relative area y_offset |
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233 double paramWY = dlRequest.getWy(); |
| 73 | 234 // relative area width (0..1) |
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235 double paramWW = dlRequest.getWw(); |
| 73 | 236 // relative area height |
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237 double paramWH = dlRequest.getWh(); |
| 73 | 238 // scale factor (additional to dw/width, dh/height) |
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239 double paramWS = dlRequest.getWs(); |
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240 // rotation angle |
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241 double paramROT = dlRequest.getRot(); |
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242 // contrast enhancement |
| 86 | 243 float paramCONT = dlRequest.getCont(); |
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244 // brightness enhancement |
| 86 | 245 float paramBRGT = dlRequest.getBrgt(); |
| 246 // color modification | |
| 247 float[] paramRGBM = dlRequest.getRgbm(); | |
| 248 float[] paramRGBA = dlRequest.getRgba(); | |
| 130 | 249 // destination resolution (DPI) |
| 250 float paramDDPIX = dlRequest.getDdpix(); | |
| 251 float paramDDPIY = dlRequest.getDdpiy(); | |
| 252 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { | |
| 253 // if X or Y resolution isn't set, use DDPI | |
| 254 paramDDPIX = dlRequest.getDdpi(); | |
| 255 paramDDPIY = dlRequest.getDdpi(); | |
| 256 } | |
| 1 | 257 |
| 73 | 258 /* operation mode: "fit": always fit to page, |
| 259 * "clip": send original resolution cropped, "file": send whole file (if | |
| 260 * allowed) | |
| 261 */ | |
| 262 if (dlRequest.isOption("clip")) { | |
| 263 scaleToFit = false; | |
| 100 | 264 absoluteScale = false; |
| 73 | 265 cropToFit = true; |
| 149 | 266 sendFile = false; |
| 267 hiresOnly = true; | |
| 73 | 268 } else if (dlRequest.isOption("fit")) { |
| 269 scaleToFit = true; | |
| 100 | 270 absoluteScale = false; |
| 122 | 271 cropToFit = false; |
| 149 | 272 sendFile = false; |
| 273 hiresOnly = false; | |
| 130 | 274 } else if (dlRequest.isOption("osize")) { |
| 100 | 275 scaleToFit = false; |
| 276 absoluteScale = true; | |
| 122 | 277 cropToFit = false; |
| 149 | 278 sendFile = false; |
| 122 | 279 hiresOnly = true; |
| 73 | 280 } else if (dlRequest.isOption("file")) { |
| 281 scaleToFit = false; | |
| 100 | 282 absoluteScale = false; |
| 153 | 283 if (sendFileAllowed) { |
| 73 | 284 cropToFit = false; |
| 149 | 285 sendFile = true; |
| 73 | 286 } else { |
| 122 | 287 // crop to fit if send file not allowed |
| 73 | 288 cropToFit = true; |
| 149 | 289 sendFile = false; |
| 73 | 290 } |
| 122 | 291 hiresOnly = true; |
| 73 | 292 } |
| 149 | 293 // operation mode: "lores": try to use scaled image, "hires": use unscaled image |
| 294 // "autores": try best fitting resolution | |
| 295 if (dlRequest.isOption("lores")) { | |
| 296 loresOnly = true; | |
| 297 hiresOnly = false; | |
| 298 } else if (dlRequest.isOption("hires")) { | |
| 299 loresOnly = false; | |
| 300 hiresOnly = true; | |
| 301 } else if (dlRequest.isOption("autores")) { | |
| 302 loresOnly = false; | |
| 303 hiresOnly = false; | |
| 304 } | |
| 73 | 305 // operation mode: "errtxt": error message in html, "errimg": error image |
| 306 if (dlRequest.isOption("errtxt")) { | |
| 307 errorMsgHtml = true; | |
| 308 } else if (dlRequest.isOption("errimg")) { | |
| 309 errorMsgHtml = false; | |
| 310 } | |
| 311 // operation mode: "q0" - "q2": interpolation quality | |
| 312 if (dlRequest.isOption("q0")) { | |
| 313 scaleQual = 0; | |
| 314 } else if (dlRequest.isOption("q1")) { | |
| 315 scaleQual = 1; | |
| 316 } else if (dlRequest.isOption("q2")) { | |
| 317 scaleQual = 2; | |
| 318 } | |
| 1 | 319 |
| 73 | 320 //"big" try for all file/image actions |
| 321 try { | |
| 322 | |
| 149 | 323 // DocuFileset of the image to load |
| 324 DocuFileset fileset = null; | |
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325 |
| 122 | 326 // new DocuInfo instance |
| 149 | 327 DocuInfo docuInfo = new ImageLoaderImageInfoDocuInfo(); |
| 73 | 328 |
| 329 /* | |
| 330 * find the file to load/send | |
| 331 */ | |
| 1 | 332 |
| 73 | 333 // get PathInfo |
| 334 String loadPathName = dlRequest.getFilePath(); | |
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335 |
| 73 | 336 /* |
| 337 * check permissions | |
| 338 */ | |
| 339 if (useAuthentication) { | |
| 340 // get a list of required roles (empty if no restrictions) | |
| 341 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 342 if (rolesRequired != null) { | |
| 343 util.dprintln(1, "Role required: " + rolesRequired); | |
| 344 util.dprintln(2, "User: " + request.getRemoteUser()); | |
| 345 // is the current request/user authorized? | |
| 346 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 347 // send deny answer and abort | |
| 348 util.dprintln(1, "ERROR: access denied!"); | |
| 349 if (errorMsgHtml) { | |
| 350 ServletOps.htmlMessage( | |
| 351 "ERROR: Unauthorized access!", | |
| 352 response); | |
| 353 } else { | |
| 153 | 354 servletOp.sendFile(denyImgFile, response); |
| 73 | 355 } |
| 356 return; | |
| 357 } | |
| 358 } | |
| 359 } | |
| 1 | 360 |
| 122 | 361 // find the file(set) |
| 86 | 362 DocuFile fileToLoad; |
| 149 | 363 fileset = dirCache.getFileset(loadPathName, dlRequest.getPn()); |
| 94 | 364 if (fileset == null) { |
| 365 throw new FileOpException( | |
| 366 "File " | |
| 367 + loadPathName | |
| 368 + "(" | |
| 369 + dlRequest.getPn() | |
| 370 + ") not found."); | |
| 371 } | |
| 372 | |
| 122 | 373 /* |
| 374 * calculate expected source image size | |
| 375 * | |
| 376 */ | |
| 149 | 377 ImageSize expectedSourceSize = new ImageSize(); |
| 122 | 378 if (scaleToFit) { |
| 379 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 149 | 380 expectedSourceSize.setSize( |
| 381 (int) (paramDW * scale), | |
| 382 (int) (paramDH * scale)); | |
| 122 | 383 } else { |
| 384 expectedSourceSize.setSize( | |
| 149 | 385 (int) (paramDW * paramWS), |
| 386 (int) (paramDH * paramWS)); | |
| 100 | 387 } |
| 388 | |
| 122 | 389 /* |
| 390 * select a resolution | |
| 391 */ | |
| 149 | 392 if (hiresOnly) { |
| 393 // get first element (= highest resolution) | |
| 394 fileToLoad = fileset.get(0); | |
| 395 } else if (loresOnly) { | |
| 396 // enforced lores uses next smaller resolution | |
| 397 fileToLoad = | |
| 398 fileset.getNextSmaller(expectedSourceSize, docuInfo); | |
| 399 if (fileToLoad == null) { | |
| 400 // this is the smallest we have | |
| 401 fileToLoad = fileset.get(fileset.size() - 1); | |
| 402 } | |
| 403 } else { | |
| 130 | 404 // autores: use next higher resolution |
| 122 | 405 fileToLoad = |
| 406 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 407 if (fileToLoad == null) { | |
| 130 | 408 // this is the highest we have |
| 122 | 409 fileToLoad = fileset.get(0); |
| 410 } | |
| 86 | 411 } |
| 412 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 413 |
| 130 | 414 if (absoluteScale) { |
| 415 // get original resolution from metadata | |
| 416 fileset.checkMeta(); | |
| 417 origResX = fileset.getResX(); | |
| 418 origResY = fileset.getResY(); | |
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419 if ((origResX == 0) || (origResY == 0)) { |
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420 throw new ImageOpException("Missing image DPI information!"); |
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421 } |
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422 |
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423 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
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424 throw new ImageOpException("Missing display DPI information!"); |
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425 } |
| 130 | 426 } |
| 427 | |
| 86 | 428 // check the source image |
| 122 | 429 if (!fileToLoad.isChecked()) { |
| 149 | 430 docuInfo.checkFile(fileToLoad); |
| 122 | 431 } |
| 86 | 432 // get the source image type |
| 433 mimeType = fileToLoad.getMimetype(); | |
| 149 | 434 // get the source image size |
| 435 ImageSize imgSize = fileToLoad.getSize(); | |
| 436 | |
| 130 | 437 // decide if the image can be sent as is |
| 438 boolean mimetypeSendable = | |
| 122 | 439 mimeType.equals("image/jpeg") |
| 440 || mimeType.equals("image/png") | |
| 441 || mimeType.equals("image/gif"); | |
| 130 | 442 boolean imagoOptions = |
| 443 dlRequest.isOption("hmir") | |
| 444 || dlRequest.isOption("vmir") | |
| 445 || (paramROT != 0) | |
| 446 || (paramRGBM != null) | |
| 447 || (paramRGBA != null) | |
| 448 || (paramCONT != 0) | |
| 449 || (paramBRGT != 0); | |
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450 boolean imageSendable = mimetypeSendable && !imagoOptions; |
| 73 | 451 |
| 122 | 452 /* if not autoRes and image smaller than requested |
| 147 | 453 * size then send as is. |
| 454 * if autoRes and image has requested size then send as is. | |
| 100 | 455 * if not autoScale and not scaleToFit nor cropToFit |
| 122 | 456 * then send as is (mo=file) |
| 73 | 457 */ |
| 149 | 458 if ((loresOnly |
| 122 | 459 && imageSendable |
| 149 | 460 && fileToLoad.getSize().isSmallerThan(expectedSourceSize)) |
| 153 | 461 || (!(loresOnly || hiresOnly) |
| 462 && fileToLoad.getSize().fitsIn(expectedSourceSize)) | |
| 149 | 463 || sendFile) { |
| 73 | 464 |
| 465 util.dprintln(1, "Sending File as is."); | |
| 1 | 466 |
| 86 | 467 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 468 |
| 73 | 469 util.dprintln( |
| 470 1, | |
| 471 "Done in " | |
| 472 + (System.currentTimeMillis() - startTime) | |
| 473 + "ms"); | |
| 474 return; | |
| 475 } | |
| 1 | 476 |
| 149 | 477 // new DocuImage instance |
| 478 DocuImage docuImage = dlConfig.getDocuImageInstance(); | |
| 479 if (docuImage == null) { | |
| 480 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 481 } | |
| 482 | |
| 483 // set interpolation quality | |
| 484 docuImage.setQuality(scaleQual); | |
| 485 | |
| 73 | 486 /* |
| 487 * crop and scale the image | |
| 488 */ | |
| 1 | 489 |
| 149 | 490 util.dprintln( |
| 491 2, | |
| 492 "IMG: " + imgSize.getWidth() + "x" + imgSize.getHeight()); | |
| 73 | 493 util.dprintln( |
| 494 2, | |
| 495 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 496 |
| 73 | 497 // coordinates and scaling |
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498 double areaXoff; |
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499 double areaYoff; |
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500 double areaWidth; |
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501 double areaHeight; |
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502 double scaleX; |
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503 double scaleY; |
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504 double scaleXY; |
| 1 | 505 |
| 100 | 506 // coordinates using Java2D |
| 507 // image size in pixels | |
| 508 Rectangle2D imgBounds = | |
| 149 | 509 new Rectangle2D.Double( |
| 510 0, | |
| 511 0, | |
| 512 imgSize.getWidth(), | |
| 513 imgSize.getHeight()); | |
| 100 | 514 // user window area in [0,1] coordinates |
| 515 Rectangle2D relUserArea = | |
| 516 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 517 // transform from relative [0,1] to image coordinates. | |
| 518 AffineTransform imgTrafo = | |
| 149 | 519 AffineTransform.getScaleInstance( |
| 520 imgSize.getWidth(), | |
| 521 imgSize.getHeight()); | |
| 85 | 522 // transform user coordinate area to image coordinate area |
| 100 | 523 Rectangle2D userImgArea = |
| 524 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 525 | |
| 526 // calculate scaling factors based on inner user area | |
| 73 | 527 if (scaleToFit) { |
| 100 | 528 areaWidth = userImgArea.getWidth(); |
| 529 areaHeight = userImgArea.getHeight(); | |
| 73 | 530 scaleX = paramDW / areaWidth * paramWS; |
| 531 scaleY = paramDH / areaHeight * paramWS; | |
| 532 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 533 } else if (absoluteScale) { |
| 534 // absolute scale | |
| 130 | 535 scaleX = paramDDPIX / origResX; |
| 536 scaleY = paramDDPIY / origResY; | |
| 537 // currently only same scale :-( | |
| 538 scaleXY = scaleX; | |
| 539 areaWidth = paramDW / scaleXY * paramWS; | |
| 540 areaHeight = paramDH / scaleXY * paramWS; | |
| 100 | 541 // reset user area size |
| 542 userImgArea.setRect( | |
| 543 userImgArea.getX(), | |
| 544 userImgArea.getY(), | |
| 545 areaWidth, | |
| 546 areaHeight); | |
| 73 | 547 } else { |
| 548 // crop to fit | |
| 85 | 549 areaWidth = paramDW * paramWS; |
| 550 areaHeight = paramDH * paramWS; | |
| 100 | 551 // reset user area size |
| 552 userImgArea.setRect( | |
| 553 userImgArea.getX(), | |
| 554 userImgArea.getY(), | |
| 555 areaWidth, | |
| 556 areaHeight); | |
| 73 | 557 scaleX = 1f; |
| 558 scaleY = 1f; | |
| 559 scaleXY = 1f; | |
| 100 | 560 } |
| 85 | 561 |
| 100 | 562 // enlarge image area for rotations to cover additional pixels |
| 563 Rectangle2D outerUserImgArea = userImgArea; | |
| 564 Rectangle2D innerUserImgArea = userImgArea; | |
| 565 if (wholeRotArea) { | |
| 566 if (paramROT != 0) { | |
| 567 try { | |
| 568 // rotate user area coordinates around center of user area | |
| 569 AffineTransform rotTrafo = | |
| 570 AffineTransform.getRotateInstance( | |
| 571 Math.toRadians(paramROT), | |
| 572 userImgArea.getCenterX(), | |
| 573 userImgArea.getCenterY()); | |
| 574 // get bounds from rotated end position | |
| 575 innerUserImgArea = | |
| 576 rotTrafo | |
| 577 .createTransformedShape(userImgArea) | |
| 578 .getBounds2D(); | |
| 579 // get bounds from back-rotated bounds | |
| 580 outerUserImgArea = | |
| 581 rotTrafo | |
| 582 .createInverse() | |
| 583 .createTransformedShape(innerUserImgArea) | |
| 584 .getBounds2D(); | |
| 585 } catch (NoninvertibleTransformException e1) { | |
| 586 // this shouldn't happen anyway | |
| 587 e1.printStackTrace(); | |
| 588 } | |
| 589 } | |
| 73 | 590 } |
| 1 | 591 |
| 73 | 592 util.dprintln( |
| 593 1, | |
| 594 "Scale " | |
| 595 + scaleXY | |
| 596 + "(" | |
| 597 + scaleX | |
| 598 + "," | |
| 599 + scaleY | |
| 600 + ") on " | |
| 100 | 601 + outerUserImgArea); |
| 1 | 602 |
| 73 | 603 // clip area at the image border |
| 100 | 604 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
| 85 | 605 |
| 100 | 606 areaWidth = outerUserImgArea.getWidth(); |
| 607 areaHeight = outerUserImgArea.getHeight(); | |
| 608 areaXoff = outerUserImgArea.getX(); | |
| 609 areaYoff = outerUserImgArea.getY(); | |
| 1 | 610 |
| 73 | 611 util.dprintln( |
| 612 2, | |
| 85 | 613 "crop: " |
| 73 | 614 + areaXoff |
| 615 + "," | |
| 616 + areaYoff | |
| 617 + " " | |
| 618 + areaWidth | |
| 619 + "x" | |
| 620 + areaHeight); | |
| 1 | 621 |
| 73 | 622 // check image parameters sanity |
| 623 if ((areaWidth < 1) | |
| 624 || (areaHeight < 1) | |
| 625 || (scaleXY * areaWidth < 2) | |
| 626 || (scaleXY * areaHeight < 2)) { | |
| 627 util.dprintln(1, "ERROR: invalid scale parameter set!"); | |
| 628 throw new ImageOpException("Invalid scale parameter set!"); | |
| 629 } | |
| 1 | 630 |
| 85 | 631 /* |
| 632 * crop and scale image | |
| 633 */ | |
| 634 | |
| 635 // use subimage loading if possible | |
| 636 if (docuImage.isSubimageSupported()) { | |
| 637 System.out.println( | |
| 638 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 639 double subf = 1d; | |
| 640 double subsamp = 1d; | |
| 641 if (scaleXY < 1) { | |
| 642 subf = 1 / scaleXY; | |
| 140 | 643 // for higher quality reduce subsample factor by minSubsample |
| 644 if (scaleQual > 0) { | |
| 645 subsamp = | |
| 646 Math.max( | |
| 153 | 647 Math.floor(subf / minSubsample), |
| 140 | 648 1d); |
| 649 } else { | |
| 650 subsamp = Math.floor(subf); | |
| 651 } | |
| 85 | 652 scaleXY = subsamp / subf; |
| 653 System.out.println( | |
| 654 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 655 } | |
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656 |
| 85 | 657 docuImage.loadSubimage( |
| 149 | 658 fileToLoad, |
| 100 | 659 outerUserImgArea.getBounds(), |
| 85 | 660 (int) subsamp); |
| 661 | |
| 662 System.out.println( | |
| 663 "SUBSAMP: " | |
| 664 + subsamp | |
| 665 + " -> " | |
| 666 + docuImage.getWidth() | |
| 667 + "x" | |
| 668 + docuImage.getHeight()); | |
| 669 | |
| 149 | 670 docuImage.scale(scaleXY, scaleXY); |
| 85 | 671 |
| 672 } else { | |
| 100 | 673 // else load and crop the whole file |
| 149 | 674 docuImage.loadImage(fileToLoad); |
| 85 | 675 docuImage.crop( |
| 676 (int) areaXoff, | |
| 677 (int) areaYoff, | |
| 678 (int) areaWidth, | |
| 679 (int) areaHeight); | |
| 680 | |
| 149 | 681 docuImage.scale(scaleXY, scaleXY); |
| 85 | 682 } |
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683 |
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684 // mirror image |
| 100 | 685 // operation mode: "hmir": mirror horizontally, "vmir": mirror vertically |
| 686 if (dlRequest.isOption("hmir")) { | |
| 687 docuImage.mirror(0); | |
| 688 } | |
| 689 if (dlRequest.isOption("vmir")) { | |
| 690 docuImage.mirror(90); | |
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691 } |
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692 |
| 100 | 693 // rotate image |
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694 if (paramROT != 0) { |
| 94 | 695 docuImage.rotate(paramROT); |
| 100 | 696 if (wholeRotArea) { |
| 697 // crop to the inner bounding box | |
| 698 double xcrop = | |
| 699 docuImage.getWidth() | |
| 700 - innerUserImgArea.getWidth() * scaleXY; | |
| 701 double ycrop = | |
| 702 docuImage.getHeight() | |
| 703 - innerUserImgArea.getHeight() * scaleXY; | |
| 704 if ((xcrop > 0) || (ycrop > 0)) { | |
| 705 // only crop smaller | |
| 706 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 707 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 708 // crop image | |
| 709 docuImage.crop( | |
| 710 (int) (xcrop / 2), | |
| 711 (int) (ycrop / 2), | |
| 712 (int) (docuImage.getWidth() - xcrop), | |
| 713 (int) (docuImage.getHeight() - ycrop)); | |
| 714 } | |
| 715 } | |
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716 |
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717 } |
| 1 | 718 |
| 86 | 719 // color modification |
| 720 if ((paramRGBM != null) || (paramRGBA != null)) { | |
| 721 // make shure we actually have two arrays | |
| 722 if (paramRGBM == null) { | |
| 723 paramRGBM = new float[3]; | |
| 724 } | |
| 725 if (paramRGBA == null) { | |
| 726 paramRGBA = new float[3]; | |
| 727 } | |
| 100 | 728 // calculate "contrast" values (c=2^x) |
| 86 | 729 float[] mult = new float[3]; |
| 730 for (int i = 0; i < 3; i++) { | |
| 94 | 731 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 732 } |
| 733 docuImage.enhanceRGB(mult, paramRGBA); | |
| 734 } | |
| 94 | 735 |
| 100 | 736 // contrast and brightness enhancement |
| 737 if ((paramCONT != 0) || (paramBRGT != 0)) { | |
| 738 double mult = Math.pow(2, paramCONT); | |
| 739 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 740 } | |
| 741 | |
| 73 | 742 util.dprintln( |
| 743 2, | |
| 744 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 745 | |
| 746 /* | |
| 747 * write the resulting image | |
| 748 */ | |
| 1 | 749 |
| 73 | 750 // setup output -- if source is JPG then dest will be JPG else it's PNG |
| 100 | 751 if (mimeType.equals("image/jpeg") |
| 752 || mimeType.equals("image/jp2")) { | |
| 753 mimeType = "image/jpeg"; | |
| 754 } else { | |
| 73 | 755 mimeType = "image/png"; |
| 756 } | |
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757 response.setContentType(mimeType); |
| 1 | 758 |
| 73 | 759 // write the image |
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760 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 761 |
| 73 | 762 util.dprintln( |
| 763 1, | |
| 764 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 765 | |
| 766 /* | |
| 767 * error handling | |
| 768 */ | |
| 1 | 769 |
| 73 | 770 } // end of "big" try |
| 156 | 771 catch (IOException e) { |
| 73 | 772 util.dprintln(1, "ERROR: File IO Error: " + e); |
| 773 try { | |
| 774 if (errorMsgHtml) { | |
| 775 ServletOps.htmlMessage( | |
| 776 "ERROR: File IO Error: " + e, | |
| 777 response); | |
| 778 } else { | |
| 153 | 779 servletOp.sendFile(errorImgFile, response); |
| 73 | 780 } |
| 781 } catch (FileOpException ex) { | |
| 782 } // so we don't get a loop | |
| 783 } catch (AuthOpException e) { | |
| 784 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 785 try { | |
| 786 if (errorMsgHtml) { | |
| 787 ServletOps.htmlMessage( | |
| 788 "ERROR: Authorization error: " + e, | |
| 789 response); | |
| 790 } else { | |
| 153 | 791 servletOp.sendFile(errorImgFile, response); |
| 73 | 792 } |
| 793 } catch (FileOpException ex) { | |
| 794 } // so we don't get a loop | |
| 795 } catch (ImageOpException e) { | |
| 796 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 797 try { | |
| 798 if (errorMsgHtml) { | |
| 799 ServletOps.htmlMessage( | |
| 800 "ERROR: Image Operation Error: " + e, | |
| 801 response); | |
| 802 } else { | |
| 153 | 803 servletOp.sendFile(errorImgFile, response); |
| 73 | 804 } |
| 805 } catch (FileOpException ex) { | |
| 806 } // so we don't get a loop | |
| 807 } catch (RuntimeException e) { | |
| 808 // JAI likes to throw RuntimeExceptions ;-( | |
| 809 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 810 try { | |
| 811 if (errorMsgHtml) { | |
| 812 ServletOps.htmlMessage( | |
| 813 "ERROR: Other Image Operation Error: " + e, | |
| 814 response); | |
| 815 } else { | |
| 153 | 816 servletOp.sendFile(errorImgFile, response); |
| 73 | 817 } |
| 818 } catch (FileOpException ex) { | |
| 819 } // so we don't get a loop | |
| 149 | 820 |
| 73 | 821 } |
| 822 } | |
| 1 | 823 |
| 73 | 824 } //Scaler class |