Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 86:997ba69afb81
New version 1.8b1.
With directory and file information cache.
With enhanceRGB method for color correction.
| author | robcast |
|---|---|
| date | Sun, 09 Mar 2003 21:37:27 +0100 |
| parents | 4e6757e8ccd4 |
| children | d9bfec4f046e |
| 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; |
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25 import java.awt.geom.Point2D; |
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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; |
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42 import digilib.image.ImageOpException; |
| 86 | 43 import digilib.io.DocuDirCache; |
| 44 import digilib.io.DocuFile; | |
| 45 import digilib.io.DocuFileset; | |
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46 import digilib.io.FileOpException; |
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47 import digilib.io.FileOps; |
| 1 | 48 |
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49 //import tilecachetool.*; |
| 1 | 50 |
| 73 | 51 /** |
| 52 * @author casties | |
| 53 * | |
| 54 */ | |
| 1 | 55 //public class Scaler extends HttpServlet implements SingleThreadModel { |
| 56 public class Scaler extends HttpServlet { | |
| 57 | |
| 73 | 58 // digilib servlet version (for all components) |
| 86 | 59 public static final String dlVersion = "1.8b1"; |
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60 |
| 73 | 61 // Utils instance with debuglevel |
| 62 Utils util; | |
| 63 // FileOps instance | |
| 64 FileOps fileOp; | |
| 65 // AuthOps instance | |
| 66 AuthOps authOp; | |
| 67 // ServletOps instance | |
| 68 ServletOps servletOp; | |
| 86 | 69 // DocuDirCache instance |
| 70 DocuDirCache dirCache; | |
| 1 | 71 |
| 73 | 72 // DigilibParameters instance |
| 73 DigilibConfiguration dlConfig; | |
| 1 | 74 |
| 73 | 75 // use authorization database |
| 76 boolean useAuthentication = true; | |
| 1 | 77 |
| 73 | 78 /** Initialisation on first run. |
| 79 * | |
| 80 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
| 81 */ | |
| 82 public void init(ServletConfig config) throws ServletException { | |
| 83 super.init(config); | |
| 1 | 84 |
| 73 | 85 // Debuggin! |
| 86 //TCTool tctool = new TCTool(); | |
| 1 | 87 |
| 73 | 88 // get our ServletContext |
| 89 ServletContext context = config.getServletContext(); | |
| 90 // see if there is a Configuration instance | |
| 91 dlConfig = | |
| 92 (DigilibConfiguration) context.getAttribute( | |
| 86 | 93 "digilib.servlet.configuration"); |
| 73 | 94 if (dlConfig == null) { |
| 95 // create new Configuration | |
| 96 try { | |
| 97 dlConfig = new DigilibConfiguration(config); | |
| 86 | 98 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 99 } catch (Exception e) { |
| 100 throw new ServletException(e); | |
| 101 } | |
| 102 } | |
| 103 // set the servlet version | |
| 104 dlConfig.setServletVersion(dlVersion); | |
| 105 // first we need an Utils | |
| 106 util = dlConfig.getUtil(); | |
| 107 // set our AuthOps | |
| 108 useAuthentication = dlConfig.isUseAuthentication(); | |
| 109 authOp = dlConfig.getAuthOp(); | |
| 110 // FileOps instance | |
| 111 fileOp = new FileOps(util); | |
| 112 // AuthOps instance | |
| 113 servletOp = new ServletOps(util); | |
| 86 | 114 // DocuDirCache instance |
| 115 dirCache = dlConfig.getDirCache(); | |
| 73 | 116 } |
| 1 | 117 |
| 73 | 118 /** Process the HTTP Get request*/ |
| 119 public void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 120 throws ServletException, IOException { | |
| 121 util.dprintln(1, "The servlet has received a GET!"); | |
| 122 // create new request with defaults | |
| 123 DigilibRequest dlReq = new DigilibRequest(); | |
| 124 // set with request parameters | |
| 125 dlReq.setWithRequest(request); | |
| 126 // add DigilibRequest to ServletRequest | |
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127 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 128 // do the processing |
| 129 processRequest(request, response); | |
| 130 } | |
| 1 | 131 |
| 73 | 132 /**Process the HTTP Post request*/ |
| 133 public void doPost( | |
| 134 HttpServletRequest request, | |
| 135 HttpServletResponse response) | |
| 136 throws ServletException, IOException { | |
| 137 util.dprintln(1, "The servlet has received a POST!"); | |
| 138 // create new request with defaults | |
| 139 DigilibRequest dlReq = new DigilibRequest(); | |
| 140 // set with request parameters | |
| 141 dlReq.setWithRequest(request); | |
| 142 // add DigilibRequest to ServletRequest | |
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143 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 144 // do the processing |
| 145 processRequest(request, response); | |
| 146 } | |
| 147 | |
| 148 /** main request handler. */ | |
| 149 void processRequest( | |
| 150 HttpServletRequest request, | |
| 151 HttpServletResponse response) | |
| 152 throws ServletException, IOException { | |
| 1 | 153 |
| 73 | 154 // time for benchmarking |
| 155 long startTime = System.currentTimeMillis(); | |
| 156 // output mime/type | |
| 157 String mimeType = "image/png"; | |
| 1 | 158 |
| 73 | 159 /* |
| 160 * parameters for a session | |
| 161 */ | |
| 1 | 162 |
| 73 | 163 // scale the image file to fit window size i.e. respect dw,dh |
| 164 boolean scaleToFit = true; | |
| 165 // crop the image if needed | |
| 166 boolean cropToFit = true; | |
| 167 // use heuristics (GIF?) to scale or send as is | |
| 168 boolean autoScale = true; | |
| 169 // try prescaled images first | |
| 170 boolean preScaledFirst = true; | |
| 171 // interpolation to use for scaling | |
| 172 int scaleQual = 0; | |
| 173 // send html error message (or image file) | |
| 174 boolean errorMsgHtml = false; | |
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175 // mirror the image |
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176 boolean doMirror = false; |
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177 // angle of mirror axis |
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178 double mirrorAngle = 0; |
| 1 | 179 |
| 73 | 180 /* |
| 181 * request parameters | |
| 182 */ | |
| 183 | |
| 184 DigilibRequest dlRequest = | |
| 185 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 186 |
| 73 | 187 // destination image width |
| 188 int paramDW = dlRequest.getDw(); | |
| 189 // destination image height | |
| 190 int paramDH = dlRequest.getDh(); | |
| 191 // relative area x_offset (0..1) | |
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192 double paramWX = dlRequest.getWx(); |
| 73 | 193 // relative area y_offset |
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194 double paramWY = dlRequest.getWy(); |
| 73 | 195 // relative area width (0..1) |
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196 double paramWW = dlRequest.getWw(); |
| 73 | 197 // relative area height |
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198 double paramWH = dlRequest.getWh(); |
| 73 | 199 // scale factor (additional to dw/width, dh/height) |
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200 double paramWS = dlRequest.getWs(); |
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201 // rotation angle |
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202 double paramROT = dlRequest.getRot(); |
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203 // contrast enhancement |
| 86 | 204 float paramCONT = dlRequest.getCont(); |
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205 // brightness enhancement |
| 86 | 206 float paramBRGT = dlRequest.getBrgt(); |
| 207 // color modification | |
| 208 float[] paramRGBM = dlRequest.getRgbm(); | |
| 209 float[] paramRGBA = dlRequest.getRgba(); | |
| 1 | 210 |
| 73 | 211 /* operation mode: "fit": always fit to page, |
| 212 * "clip": send original resolution cropped, "file": send whole file (if | |
| 213 * allowed) | |
| 214 */ | |
| 215 if (dlRequest.isOption("clip")) { | |
| 216 scaleToFit = false; | |
| 217 cropToFit = true; | |
| 218 autoScale = false; | |
| 219 } else if (dlRequest.isOption("fit")) { | |
| 220 scaleToFit = true; | |
| 221 cropToFit = true; | |
| 222 autoScale = false; | |
| 223 } else if (dlRequest.isOption("file")) { | |
| 224 scaleToFit = false; | |
| 225 if (dlConfig.isSendFileAllowed()) { | |
| 226 cropToFit = false; | |
| 227 } else { | |
| 228 cropToFit = true; | |
| 229 } | |
| 230 autoScale = false; | |
| 231 } | |
| 232 // operation mode: "errtxt": error message in html, "errimg": error image | |
| 233 if (dlRequest.isOption("errtxt")) { | |
| 234 errorMsgHtml = true; | |
| 235 } else if (dlRequest.isOption("errimg")) { | |
| 236 errorMsgHtml = false; | |
| 237 } | |
| 238 // operation mode: "q0" - "q2": interpolation quality | |
| 239 if (dlRequest.isOption("q0")) { | |
| 240 scaleQual = 0; | |
| 241 } else if (dlRequest.isOption("q1")) { | |
| 242 scaleQual = 1; | |
| 243 } else if (dlRequest.isOption("q2")) { | |
| 244 scaleQual = 2; | |
| 245 } | |
| 246 // operation mode: "lores": try to use scaled image, "hires": use unscaled image | |
| 247 if (dlRequest.isOption("lores")) { | |
| 248 preScaledFirst = true; | |
| 249 } else if (dlRequest.isOption("hires")) { | |
| 250 preScaledFirst = false; | |
| 251 } | |
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252 // operation mode: "hmir": mirror horizontally, "vmir": mirror vertically |
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253 if (dlRequest.isOption("hmir")) { |
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254 doMirror = true; |
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255 mirrorAngle = 0; |
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256 } else if (dlRequest.isOption("vmir")) { |
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257 doMirror = true; |
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258 mirrorAngle = 90; |
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259 } |
| 1 | 260 |
| 73 | 261 //"big" try for all file/image actions |
| 262 try { | |
| 263 | |
| 86 | 264 // new DocuImage instance |
| 73 | 265 DocuImage docuImage = dlConfig.getDocuImageInstance(); |
| 266 if (docuImage == null) { | |
| 267 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 268 } | |
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269 |
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270 // set interpolation quality |
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271 docuImage.setQuality(scaleQual); |
| 73 | 272 |
| 273 /* | |
| 274 * find the file to load/send | |
| 275 */ | |
| 1 | 276 |
| 73 | 277 // get PathInfo |
| 278 String loadPathName = dlRequest.getFilePath(); | |
| 279 // if it's zoomed, try hires version (to be optimized...) | |
| 280 if ((paramWW < 1f) || (paramWH < 1f)) { | |
| 281 preScaledFirst = false; | |
| 282 } | |
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283 |
| 73 | 284 /* |
| 285 * check permissions | |
| 286 */ | |
| 287 if (useAuthentication) { | |
| 288 // get a list of required roles (empty if no restrictions) | |
| 289 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 290 if (rolesRequired != null) { | |
| 291 util.dprintln(1, "Role required: " + rolesRequired); | |
| 292 util.dprintln(2, "User: " + request.getRemoteUser()); | |
| 293 // is the current request/user authorized? | |
| 294 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 295 // send deny answer and abort | |
| 296 util.dprintln(1, "ERROR: access denied!"); | |
| 297 if (errorMsgHtml) { | |
| 298 ServletOps.htmlMessage( | |
| 299 "ERROR: Unauthorized access!", | |
| 300 response); | |
| 301 } else { | |
| 302 servletOp.sendFile( | |
| 303 new File(dlConfig.getDenyImgFileName()), | |
| 304 response); | |
| 305 } | |
| 306 return; | |
| 307 } | |
| 308 } | |
| 309 } | |
| 1 | 310 |
| 73 | 311 // find the file |
| 86 | 312 DocuFile fileToLoad; |
| 313 DocuFileset fileset = dirCache.getFileset(loadPathName, dlRequest.getPn()); | |
| 314 // simplistic selection of resolution | |
| 315 if (preScaledFirst) { | |
| 316 fileToLoad = (DocuFile)fileset.lastElement(); | |
| 317 } else { | |
| 318 fileToLoad = (DocuFile)fileset.firstElement(); | |
| 319 } | |
| 320 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 321 |
| 86 | 322 // check the source image |
| 323 docuImage.checkFile(fileToLoad); | |
| 324 // get the source image type | |
| 325 mimeType = fileToLoad.getMimetype(); | |
| 73 | 326 |
| 327 /* if autoScale and not zoomed and source is GIF/PNG | |
| 328 * then send as is. | |
| 329 */ | |
| 330 if ((autoScale | |
| 331 && (mimeType == "image/gif" || mimeType == "image/png") | |
| 332 && (paramWW == 1f) | |
| 333 && (paramWH == 1f)) | |
| 334 || (autoScale && !(scaleToFit || cropToFit))) { | |
| 335 | |
| 336 util.dprintln(1, "Sending File as is."); | |
| 1 | 337 |
| 86 | 338 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 339 |
| 73 | 340 util.dprintln( |
| 341 1, | |
| 342 "Done in " | |
| 343 + (System.currentTimeMillis() - startTime) | |
| 344 + "ms"); | |
| 345 return; | |
| 346 } | |
| 1 | 347 |
| 73 | 348 /* |
| 349 * crop and scale the image | |
| 350 */ | |
| 1 | 351 |
| 86 | 352 int imgWidth = 0; |
| 353 int imgHeight = 0; | |
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354 // get image size |
| 86 | 355 if (fileToLoad.getSize() == null) { |
| 356 // size unknown so far | |
| 357 imgWidth = docuImage.getWidth(); | |
| 358 imgHeight = docuImage.getHeight(); | |
| 359 // remember size | |
| 360 fileToLoad.setSize(new Dimension(imgWidth, imgHeight)); | |
| 361 } else { | |
| 362 imgWidth = fileToLoad.getSize().width; | |
| 363 imgHeight = fileToLoad.getSize().height; | |
| 364 } | |
| 365 | |
| 73 | 366 util.dprintln(2, "IMG: " + imgWidth + "x" + imgHeight); |
| 367 util.dprintln( | |
| 368 2, | |
| 369 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 370 |
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371 // coordinates using Java2D |
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372 // image size |
| 85 | 373 Rectangle2D imgBounds = |
| 374 new Rectangle2D.Double(0, 0, imgWidth, imgHeight); | |
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375 // user window area in 4-point form (ul, ur, ll, lr) |
| 85 | 376 Point2D[] userAreaC = |
| 377 { | |
| 378 new Point2D.Double(paramWX, paramWY), | |
| 379 new Point2D.Double(paramWX + paramWW, paramWY), | |
| 380 new Point2D.Double(paramWX, paramWY + paramWH), | |
| 381 new Point2D.Double(paramWX + paramWW, paramWY + paramWH)}; | |
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382 // transformation from relative [0,1] to image coordinates. |
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383 AffineTransform imgTrafo = new AffineTransform(); |
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384 imgTrafo.scale(imgWidth, imgHeight); |
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385 // rotate coordinates |
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386 //imgTrafo.rotate(Math.toRadians(-paramROT)); |
| 85 | 387 |
| 73 | 388 // coordinates and scaling |
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389 double areaXoff; |
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390 double areaYoff; |
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391 double areaWidth; |
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392 double areaHeight; |
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393 double scaleX; |
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394 double scaleY; |
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395 double scaleXY; |
| 1 | 396 |
| 85 | 397 /* if (scaleToFit) { |
| 398 // calculate absolute from relative coordinates | |
| 399 areaXoff = paramWX * imgWidth; | |
| 400 areaYoff = paramWY * imgHeight; | |
| 401 areaWidth = paramWW * imgWidth; | |
| 402 areaHeight = paramWH * imgHeight; | |
| 403 // calculate scaling factors | |
| 404 scaleX = paramDW / areaWidth * paramWS; | |
| 405 scaleY = paramDH / areaHeight * paramWS; | |
| 406 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 407 } else { | |
| 408 // crop to fit | |
| 409 // calculate absolute from relative coordinates | |
| 410 areaXoff = paramWX * imgWidth; | |
| 411 areaYoff = paramWY * imgHeight; | |
| 412 areaWidth = paramDW; | |
| 413 areaHeight = paramDH; | |
| 414 // calculate scaling factors | |
| 415 scaleX = 1f; | |
| 416 scaleY = 1f; | |
| 417 scaleXY = 1f; | |
| 418 } | |
| 419 | |
| 420 util.dprintln( | |
| 421 1, | |
| 422 "Scale " | |
| 423 + scaleXY | |
| 424 + "(" | |
| 425 + scaleX | |
| 426 + "," | |
| 427 + scaleY | |
| 428 + ") on " | |
| 429 + areaXoff | |
| 430 + "," | |
| 431 + areaYoff | |
| 432 + " " | |
| 433 + areaWidth | |
| 434 + "x" | |
| 435 + areaHeight); | |
| 436 */ | |
| 437 // Java2D | |
| 438 // area in image pixel coordinates | |
| 439 Point2D[] imgAreaC = { null, null, null, null }; | |
| 440 // transform user coordinate area to image coordinate area | |
| 441 imgTrafo.transform(userAreaC, 0, imgAreaC, 0, 4); | |
| 442 areaXoff = imgAreaC[0].getX(); | |
| 443 areaYoff = imgAreaC[0].getY(); | |
| 444 // calculate scaling factors | |
| 73 | 445 if (scaleToFit) { |
| 85 | 446 areaWidth = imgAreaC[0].distance(imgAreaC[1]); |
| 447 areaHeight = imgAreaC[0].distance(imgAreaC[2]); | |
| 73 | 448 scaleX = paramDW / areaWidth * paramWS; |
| 449 scaleY = paramDH / areaHeight * paramWS; | |
| 450 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 451 } else { | |
| 452 // crop to fit | |
| 85 | 453 areaWidth = paramDW * paramWS; |
| 454 areaHeight = paramDH * paramWS; | |
| 73 | 455 scaleX = 1f; |
| 456 scaleY = 1f; | |
| 457 scaleXY = 1f; | |
| 85 | 458 |
| 73 | 459 } |
| 1 | 460 |
| 73 | 461 util.dprintln( |
| 462 1, | |
| 463 "Scale " | |
| 464 + scaleXY | |
| 465 + "(" | |
| 466 + scaleX | |
| 467 + "," | |
| 468 + scaleY | |
| 469 + ") on " | |
| 470 + areaXoff | |
| 471 + "," | |
| 472 + areaYoff | |
| 473 + " " | |
| 474 + areaWidth | |
| 475 + "x" | |
| 476 + areaHeight); | |
| 1 | 477 |
| 73 | 478 // clip area at the image border |
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479 /* areaWidth = |
| 73 | 480 (areaXoff + areaWidth > imgWidth) |
| 481 ? imgWidth - areaXoff | |
| 482 : areaWidth; | |
| 483 areaHeight = | |
| 484 (areaYoff + areaHeight > imgHeight) | |
| 485 ? imgHeight - areaYoff | |
| 486 : areaHeight; | |
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487 */ |
| 85 | 488 |
| 489 // create new rectangle from coordinates | |
| 490 Rectangle2D imgArea = | |
| 491 new Rectangle2D.Double( | |
| 492 areaXoff, | |
| 493 areaYoff, | |
| 494 areaWidth, | |
| 495 areaHeight); | |
| 496 // clip area at the image border | |
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497 imgArea = imgArea.createIntersection(imgBounds); |
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498 areaWidth = imgArea.getWidth(); |
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499 areaHeight = imgArea.getHeight(); |
| 1 | 500 |
| 73 | 501 util.dprintln( |
| 502 2, | |
| 85 | 503 "crop: " |
| 73 | 504 + areaXoff |
| 505 + "," | |
| 506 + areaYoff | |
| 507 + " " | |
| 508 + areaWidth | |
| 509 + "x" | |
| 510 + areaHeight); | |
| 1 | 511 |
| 73 | 512 // check image parameters sanity |
| 513 if ((areaWidth < 1) | |
| 514 || (areaHeight < 1) | |
| 515 || (scaleXY * areaWidth < 2) | |
| 516 || (scaleXY * areaHeight < 2)) { | |
| 517 util.dprintln(1, "ERROR: invalid scale parameter set!"); | |
| 518 throw new ImageOpException("Invalid scale parameter set!"); | |
| 519 } | |
| 1 | 520 |
| 85 | 521 /* |
| 522 * crop and scale image | |
| 523 */ | |
| 524 | |
| 525 // use subimage loading if possible | |
| 526 if (docuImage.isSubimageSupported()) { | |
| 527 System.out.println( | |
| 528 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 529 double subf = 1d; | |
| 530 double subsamp = 1d; | |
| 531 if (scaleXY < 1) { | |
| 532 subf = 1 / scaleXY; | |
| 533 subsamp = Math.floor(subf); | |
| 534 scaleXY = subsamp / subf; | |
| 535 System.out.println( | |
| 536 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 537 } | |
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538 |
| 85 | 539 docuImage.loadSubimage( |
| 86 | 540 fileToLoad.getFile(), |
| 85 | 541 imgArea.getBounds(), |
| 542 (int) subsamp); | |
| 543 | |
| 544 System.out.println( | |
| 545 "SUBSAMP: " | |
| 546 + subsamp | |
| 547 + " -> " | |
| 548 + docuImage.getWidth() | |
| 549 + "x" | |
| 550 + docuImage.getHeight()); | |
| 551 | |
| 552 docuImage.scale(scaleXY); | |
| 553 | |
| 554 } else { | |
| 86 | 555 // else load the whole file |
| 556 docuImage.loadImage(fileToLoad.getFile()); | |
| 85 | 557 docuImage.crop( |
| 558 (int) areaXoff, | |
| 559 (int) areaYoff, | |
| 560 (int) areaWidth, | |
| 561 (int) areaHeight); | |
| 562 | |
| 563 docuImage.scale(scaleXY); | |
| 564 } | |
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565 |
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566 // mirror image |
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567 if (doMirror) { |
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568 docuImage.mirror(mirrorAngle); |
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569 } |
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570 |
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571 // rotate image (first shot :-) |
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572 if (paramROT != 0) { |
| 85 | 573 docuImage.rotate( |
| 574 paramROT); | |
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575 } |
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576 |
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577 // contrast and brightness enhancement |
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578 if ((paramCONT != 0) || (paramBRGT != 0)) { |
| 85 | 579 double mult = Math.pow(2, paramCONT); |
| 86 | 580 docuImage.enhance((float)mult, (float)paramBRGT); |
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581 } |
| 1 | 582 |
| 86 | 583 // color modification |
| 584 if ((paramRGBM != null) || (paramRGBA != null)) { | |
| 585 // make shure we actually have two arrays | |
| 586 if (paramRGBM == null) { | |
| 587 paramRGBM = new float[3]; | |
| 588 } | |
| 589 if (paramRGBA == null) { | |
| 590 paramRGBA = new float[3]; | |
| 591 } | |
| 592 // calculate "contrast" values | |
| 593 float[] mult = new float[3]; | |
| 594 for (int i = 0; i < 3; i++) { | |
| 595 mult[i] = (float)Math.pow(2, (double)paramRGBM[i]); | |
| 596 } | |
| 597 docuImage.enhanceRGB(mult, paramRGBA); | |
| 598 } | |
| 599 | |
| 73 | 600 util.dprintln( |
| 601 2, | |
| 602 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 603 | |
| 604 /* | |
| 605 * write the resulting image | |
| 606 */ | |
| 1 | 607 |
| 73 | 608 // setup output -- if source is JPG then dest will be JPG else it's PNG |
| 609 if (mimeType != "image/jpeg") { | |
| 610 mimeType = "image/png"; | |
| 611 } | |
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612 response.setContentType(mimeType); |
| 1 | 613 |
| 73 | 614 // write the image |
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615 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 616 |
| 73 | 617 util.dprintln( |
| 618 1, | |
| 619 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 620 | |
| 621 /* | |
| 622 * error handling | |
| 623 */ | |
| 1 | 624 |
| 73 | 625 } // end of "big" try |
| 626 catch (FileOpException e) { | |
| 627 util.dprintln(1, "ERROR: File IO Error: " + e); | |
| 628 try { | |
| 629 if (errorMsgHtml) { | |
| 630 ServletOps.htmlMessage( | |
| 631 "ERROR: File IO Error: " + e, | |
| 632 response); | |
| 633 } else { | |
| 634 servletOp.sendFile( | |
| 635 new File(dlConfig.getErrorImgFileName()), | |
| 636 response); | |
| 637 } | |
| 638 } catch (FileOpException ex) { | |
| 639 } // so we don't get a loop | |
| 640 return; | |
| 641 } catch (AuthOpException e) { | |
| 642 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 643 try { | |
| 644 if (errorMsgHtml) { | |
| 645 ServletOps.htmlMessage( | |
| 646 "ERROR: Authorization error: " + e, | |
| 647 response); | |
| 648 } else { | |
| 649 servletOp.sendFile( | |
| 650 new File(dlConfig.getErrorImgFileName()), | |
| 651 response); | |
| 652 } | |
| 653 } catch (FileOpException ex) { | |
| 654 } // so we don't get a loop | |
| 655 return; | |
| 656 } catch (ImageOpException e) { | |
| 657 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 658 try { | |
| 659 if (errorMsgHtml) { | |
| 660 ServletOps.htmlMessage( | |
| 661 "ERROR: Image Operation Error: " + e, | |
| 662 response); | |
| 663 } else { | |
| 664 servletOp.sendFile( | |
| 665 new File(dlConfig.getErrorImgFileName()), | |
| 666 response); | |
| 667 } | |
| 668 } catch (FileOpException ex) { | |
| 669 } // so we don't get a loop | |
| 670 return; | |
| 671 } catch (RuntimeException e) { | |
| 672 // JAI likes to throw RuntimeExceptions ;-( | |
| 673 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 674 try { | |
| 675 if (errorMsgHtml) { | |
| 676 ServletOps.htmlMessage( | |
| 677 "ERROR: Other Image Operation Error: " + e, | |
| 678 response); | |
| 679 } else { | |
| 680 servletOp.sendFile( | |
| 681 new File(dlConfig.getErrorImgFileName()), | |
| 682 response); | |
| 683 } | |
| 684 } catch (FileOpException ex) { | |
| 685 } // so we don't get a loop | |
| 686 return; | |
| 687 } | |
| 688 } | |
| 1 | 689 |
| 73 | 690 } //Scaler class |