Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 253:2adfb8bea870
servlet version 1.19b5
- filename and dpi in request
- filename and dpi in dlInfo-*
| author | robcast |
|---|---|
| date | Wed, 25 Aug 2004 01:06:30 +0200 |
| parents | aaf6eace011d |
| children | e16d132aa6f6 |
| rev | line source |
|---|---|
| 181 | 1 /* |
| 2 * Scaler -- Scaler servlet main class | |
| 3 * | |
| 4 * Digital Image Library servlet components | |
| 5 * | |
| 6 * Copyright (C) 2001, 2002, 2003 Robert Casties (robcast@mail.berlios.de) | |
| 7 * | |
| 8 * This program is free software; you can redistribute it and/or modify it | |
| 9 * under the terms of the GNU General Public License as published by the Free | |
| 10 * Software Foundation; either version 2 of the License, or (at your option) | |
| 11 * any later version. | |
| 12 * | |
| 13 * Please read license.txt for the full details. A copy of the GPL may be found | |
| 14 * at http://www.gnu.org/copyleft/lgpl.html | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License along with | |
| 17 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
| 18 * Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 * | |
| 20 */ | |
| 1 | 21 |
| 22 package digilib.servlet; | |
| 23 | |
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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 |
| 181 | 38 import org.apache.log4j.Logger; |
| 39 | |
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40 import digilib.auth.AuthOpException; |
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41 import digilib.auth.AuthOps; |
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42 import digilib.image.DocuImage; |
| 122 | 43 import digilib.image.DocuInfo; |
| 149 | 44 import digilib.image.ImageLoaderImageInfoDocuInfo; |
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45 import digilib.image.ImageOpException; |
| 149 | 46 import digilib.image.ImageSize; |
| 86 | 47 import digilib.io.DocuDirCache; |
| 181 | 48 import digilib.io.FileOpException; |
| 49 import digilib.io.FileOps; | |
| 161 | 50 import digilib.io.ImageFile; |
| 51 import digilib.io.ImageFileset; | |
| 1 | 52 |
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53 //import tilecachetool.*; |
| 1 | 54 |
| 73 | 55 /** |
| 181 | 56 * @author casties |
| 57 */ | |
| 1 | 58 //public class Scaler extends HttpServlet implements SingleThreadModel { |
| 59 public class Scaler extends HttpServlet { | |
| 60 | |
| 73 | 61 // digilib servlet version (for all components) |
| 253 | 62 public static final String dlVersion = "1.19b5"; |
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63 |
| 181 | 64 // logger for accounting requests |
| 65 Logger accountlog = Logger.getLogger("account.request"); | |
| 66 // gengeral logger for this class | |
| 67 Logger logger = Logger.getLogger("digilib.servlet"); | |
| 68 // logger for authentication related | |
| 69 Logger authlog = Logger.getLogger("digilib.auth"); | |
| 70 | |
| 71 | |
| 73 | 72 // AuthOps instance |
| 73 AuthOps authOp; | |
| 86 | 74 // DocuDirCache instance |
| 75 DocuDirCache dirCache; | |
| 161 | 76 |
| 153 | 77 // deny image file |
| 78 File denyImgFile; | |
| 79 // error image file | |
| 80 File errorImgFile; | |
| 81 // subsampling before scaling | |
| 82 float minSubsample = 2f; | |
| 83 // send files as is? | |
| 84 boolean sendFileAllowed = true; | |
| 85 // default scaling quality | |
| 86 int defaultQuality = 1; | |
| 1 | 87 |
| 94 | 88 // DigilibConfiguration instance |
| 73 | 89 DigilibConfiguration dlConfig; |
| 1 | 90 |
| 73 | 91 // use authorization database |
| 92 boolean useAuthentication = true; | |
| 1 | 93 |
| 100 | 94 // EXPRIMENTAL |
| 95 // try to enlarge cropping area for "oblique" angles | |
| 96 boolean wholeRotArea = false; | |
| 97 | |
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98 /** |
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99 * Initialisation on first run. |
| 73 | 100 * |
| 101 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
| 102 */ | |
| 103 public void init(ServletConfig config) throws ServletException { | |
| 104 super.init(config); | |
| 1 | 105 |
| 73 | 106 // Debuggin! |
| 107 //TCTool tctool = new TCTool(); | |
| 153 | 108 |
| 147 | 109 System.out.println( |
| 189 | 110 "***** Digital Image Library Image Scaler Servlet (version " |
| 147 | 111 + dlVersion |
| 112 + ") *****"); | |
| 1 | 113 |
| 73 | 114 // get our ServletContext |
| 115 ServletContext context = config.getServletContext(); | |
| 116 // see if there is a Configuration instance | |
| 117 dlConfig = | |
| 118 (DigilibConfiguration) context.getAttribute( | |
| 86 | 119 "digilib.servlet.configuration"); |
| 73 | 120 if (dlConfig == null) { |
| 121 // create new Configuration | |
| 122 try { | |
| 123 dlConfig = new DigilibConfiguration(config); | |
| 86 | 124 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 125 } catch (Exception e) { |
| 126 throw new ServletException(e); | |
| 127 } | |
| 128 } | |
| 181 | 129 // say hello in the log file |
| 189 | 130 logger.info("***** Digital Image Library Image Scaler Servlet (version " |
| 181 | 131 + dlVersion |
| 132 + ") *****"); | |
| 73 | 133 // set our AuthOps |
| 153 | 134 useAuthentication = dlConfig.getAsBoolean("use-authorization"); |
| 181 | 135 // AuthOps instance |
| 153 | 136 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op"); |
| 181 | 137 |
| 86 | 138 // DocuDirCache instance |
| 153 | 139 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache"); |
| 140 denyImgFile = new File(dlConfig.getAsString("denied-image")); | |
| 141 errorImgFile = new File(dlConfig.getAsString("error-image")); | |
| 142 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed"); | |
| 143 minSubsample = dlConfig.getAsFloat("subsample-minimum"); | |
| 144 defaultQuality = dlConfig.getAsInt("default-quality"); | |
| 73 | 145 } |
| 1 | 146 |
| 181 | 147 /** Process the HTTP Get request */ |
| 73 | 148 public void doGet(HttpServletRequest request, HttpServletResponse response) |
| 149 throws ServletException, IOException { | |
| 181 | 150 accountlog.info("GET from "+request.getRemoteAddr()); |
| 73 | 151 // create new request with defaults |
| 152 DigilibRequest dlReq = new DigilibRequest(); | |
| 153 // set with request parameters | |
| 154 dlReq.setWithRequest(request); | |
| 155 // add DigilibRequest to ServletRequest | |
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156 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 157 // do the processing |
| 158 processRequest(request, response); | |
| 159 } | |
| 1 | 160 |
| 181 | 161 /** Process the HTTP Post request */ |
| 73 | 162 public void doPost( |
| 163 HttpServletRequest request, | |
| 164 HttpServletResponse response) | |
| 165 throws ServletException, IOException { | |
| 181 | 166 accountlog.info("POST from "+request.getRemoteAddr()); |
| 73 | 167 // create new request with defaults |
| 168 DigilibRequest dlReq = new DigilibRequest(); | |
| 169 // set with request parameters | |
| 170 dlReq.setWithRequest(request); | |
| 171 // add DigilibRequest to ServletRequest | |
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172 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 173 // do the processing |
| 174 processRequest(request, response); | |
| 175 } | |
| 176 | |
| 177 /** main request handler. */ | |
| 178 void processRequest( | |
| 179 HttpServletRequest request, | |
| 180 HttpServletResponse response) | |
| 181 throws ServletException, IOException { | |
| 1 | 182 |
| 181 | 183 accountlog.debug("request: "+request.getQueryString()); |
| 189 | 184 logger.debug("request: "+request.getQueryString()); |
| 181 | 185 |
| 73 | 186 // time for benchmarking |
| 187 long startTime = System.currentTimeMillis(); | |
| 188 // output mime/type | |
| 189 String mimeType = "image/png"; | |
| 1 | 190 |
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191 /* parameters for a session */ |
| 1 | 192 |
| 73 | 193 // scale the image file to fit window size i.e. respect dw,dh |
| 194 boolean scaleToFit = true; | |
| 100 | 195 // scale the image by a fixed factor only |
| 196 boolean absoluteScale = false; | |
| 122 | 197 // only crop the image to fit |
| 198 boolean cropToFit = false; | |
| 149 | 199 // send the file as is |
| 200 boolean sendFile = false; | |
| 201 // use low resolution images only | |
| 202 boolean loresOnly = false; | |
| 203 // use hires images only | |
| 122 | 204 boolean hiresOnly = false; |
| 73 | 205 // interpolation to use for scaling |
| 153 | 206 int scaleQual = defaultQuality; |
| 73 | 207 // send html error message (or image file) |
| 208 boolean errorMsgHtml = false; | |
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209 // mirror the image |
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210 boolean doMirror = false; |
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211 // angle of mirror axis |
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212 double mirrorAngle = 0; |
| 130 | 213 // original (hires) image resolution |
| 214 double origResX = 0; | |
| 215 double origResY = 0; | |
| 1 | 216 |
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217 /* request parameters */ |
| 73 | 218 |
| 219 DigilibRequest dlRequest = | |
| 220 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 221 |
| 73 | 222 // destination image width |
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223 int paramDW = dlRequest.getAsInt("dw"); |
| 73 | 224 // destination image height |
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225 int paramDH = dlRequest.getAsInt("dh"); |
| 73 | 226 // relative area x_offset (0..1) |
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227 double paramWX = dlRequest.getAsFloat("wx"); |
| 73 | 228 // relative area y_offset |
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229 double paramWY = dlRequest.getAsFloat("wy"); |
| 73 | 230 // relative area width (0..1) |
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231 double paramWW = dlRequest.getAsFloat("ww"); |
| 73 | 232 // relative area height |
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233 double paramWH = dlRequest.getAsFloat("wh"); |
| 73 | 234 // scale factor (additional to dw/width, dh/height) |
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235 double paramWS = dlRequest.getAsFloat("ws"); |
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236 // rotation angle |
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237 double paramROT = dlRequest.getAsFloat("rot"); |
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238 // contrast enhancement |
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239 float paramCONT = dlRequest.getAsFloat("cont"); |
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240 // brightness enhancement |
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241 float paramBRGT = dlRequest.getAsFloat("brgt"); |
| 86 | 242 // color modification |
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243 float[] paramRGBM = null; |
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244 Parameter p = dlRequest.get("rgbm"); |
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245 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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246 paramRGBM = p.parseAsFloatArray("/"); |
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247 } |
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248 float[] paramRGBA = null; |
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249 p = dlRequest.get("rgba"); |
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250 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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251 paramRGBA = p.parseAsFloatArray("/"); |
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252 } |
| 130 | 253 // destination resolution (DPI) |
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254 float paramDDPIX = dlRequest.getAsFloat("ddpix"); |
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255 float paramDDPIY = dlRequest.getAsFloat("ddpiy"); |
| 130 | 256 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
| 257 // if X or Y resolution isn't set, use DDPI | |
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258 paramDDPIX = dlRequest.getAsFloat("ddpi"); |
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259 paramDDPIY = paramDDPIX; |
| 130 | 260 } |
| 1 | 261 |
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262 /* |
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263 * operation mode: "fit": always fit to page, "clip": send original |
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264 * resolution cropped, "file": send whole file (if allowed) |
| 73 | 265 */ |
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266 if (dlRequest.hasOption("mo", "clip")) { |
| 73 | 267 scaleToFit = false; |
| 100 | 268 absoluteScale = false; |
| 73 | 269 cropToFit = true; |
| 149 | 270 sendFile = false; |
| 271 hiresOnly = true; | |
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272 } else if (dlRequest.hasOption("mo", "fit")) { |
| 73 | 273 scaleToFit = true; |
| 100 | 274 absoluteScale = false; |
| 122 | 275 cropToFit = false; |
| 149 | 276 sendFile = false; |
| 277 hiresOnly = false; | |
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278 } else if (dlRequest.hasOption("mo", "osize")) { |
| 100 | 279 scaleToFit = false; |
| 280 absoluteScale = true; | |
| 122 | 281 cropToFit = false; |
| 149 | 282 sendFile = false; |
| 122 | 283 hiresOnly = true; |
| 73 | 284 } |
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285 // operation mode: "lores": try to use scaled image, "hires": use |
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286 // unscaled image |
| 149 | 287 // "autores": try best fitting resolution |
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288 if (dlRequest.hasOption("mo", "lores")) { |
| 149 | 289 loresOnly = true; |
| 290 hiresOnly = false; | |
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291 } else if (dlRequest.hasOption("mo", "hires")) { |
| 149 | 292 loresOnly = false; |
| 293 hiresOnly = true; | |
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294 } else if (dlRequest.hasOption("mo", "autores")) { |
| 149 | 295 loresOnly = false; |
| 296 hiresOnly = false; | |
| 297 } | |
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298 // operation mode: "errtxt": error message in html, "errimg": error |
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299 // image |
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300 if (dlRequest.hasOption("mo", "errtxt")) { |
| 73 | 301 errorMsgHtml = true; |
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302 } else if (dlRequest.hasOption("mo", "errimg")) { |
| 73 | 303 errorMsgHtml = false; |
| 304 } | |
| 305 // operation mode: "q0" - "q2": interpolation quality | |
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306 if (dlRequest.hasOption("mo", "q0")) { |
| 73 | 307 scaleQual = 0; |
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308 } else if (dlRequest.hasOption("mo", "q1")) { |
| 73 | 309 scaleQual = 1; |
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310 } else if (dlRequest.hasOption("mo", "q2")) { |
| 73 | 311 scaleQual = 2; |
| 312 } | |
| 1 | 313 |
| 185 | 314 // check with the maximum allowed size (if set) |
| 315 int maxImgSize = dlConfig.getAsInt("max-image-size"); | |
| 316 if (maxImgSize > 0) { | |
| 317 paramDW = (paramDW * paramWS > maxImgSize) ? (int)(maxImgSize / paramWS) : paramDW; | |
| 318 paramDH = (paramDH * paramWS > maxImgSize) ? (int)(maxImgSize / paramWS) : paramDH; | |
| 319 } | |
| 320 | |
| 73 | 321 //"big" try for all file/image actions |
| 322 try { | |
| 323 | |
| 161 | 324 // ImageFileset of the image to load |
| 325 ImageFileset fileset = null; | |
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326 |
| 122 | 327 // new DocuInfo instance |
| 149 | 328 DocuInfo docuInfo = new ImageLoaderImageInfoDocuInfo(); |
| 73 | 329 |
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330 /* find the file to load/send */ |
| 1 | 331 |
| 73 | 332 // get PathInfo |
| 333 String loadPathName = dlRequest.getFilePath(); | |
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334 |
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335 /* check permissions */ |
| 73 | 336 if (useAuthentication) { |
| 337 // get a list of required roles (empty if no restrictions) | |
| 338 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 339 if (rolesRequired != null) { | |
| 181 | 340 authlog.info("Role required: " + rolesRequired); |
| 341 authlog.info("User: " + request.getRemoteUser()); | |
| 73 | 342 // is the current request/user authorized? |
| 343 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 344 // send deny answer and abort | |
| 181 | 345 authlog.error("ERROR: access denied!"); |
| 73 | 346 if (errorMsgHtml) { |
| 347 ServletOps.htmlMessage( | |
| 348 "ERROR: Unauthorized access!", | |
| 349 response); | |
| 350 } else { | |
| 181 | 351 ServletOps.sendFile(denyImgFile, null, response); |
| 73 | 352 } |
| 353 return; | |
| 354 } | |
| 355 } | |
| 356 } | |
| 1 | 357 |
| 122 | 358 // find the file(set) |
| 161 | 359 ImageFile fileToLoad; |
| 360 fileset = | |
| 361 (ImageFileset) dirCache.getFile( | |
| 362 loadPathName, | |
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363 dlRequest.getAsInt("pn"), |
| 161 | 364 FileOps.CLASS_IMAGE); |
| 94 | 365 if (fileset == null) { |
| 366 throw new FileOpException( | |
| 367 "File " | |
| 368 + loadPathName | |
| 369 + "(" | |
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370 + dlRequest.getAsInt("pn") |
| 94 | 371 + ") not found."); |
| 372 } | |
| 181 | 373 |
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374 /* calculate expected source image size */ |
| 149 | 375 ImageSize expectedSourceSize = new ImageSize(); |
| 122 | 376 if (scaleToFit) { |
| 377 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 149 | 378 expectedSourceSize.setSize( |
| 379 (int) (paramDW * scale), | |
| 380 (int) (paramDH * scale)); | |
| 122 | 381 } else { |
| 382 expectedSourceSize.setSize( | |
| 149 | 383 (int) (paramDW * paramWS), |
| 384 (int) (paramDH * paramWS)); | |
| 100 | 385 } |
| 386 | |
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387 /* select a resolution */ |
| 149 | 388 if (hiresOnly) { |
| 389 // get first element (= highest resolution) | |
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390 fileToLoad = fileset.getBiggest(); |
| 149 | 391 } else if (loresOnly) { |
| 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 | |
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397 fileToLoad = fileset.getSmallest(); |
| 149 | 398 } |
| 399 } else { | |
| 130 | 400 // autores: use next higher resolution |
| 122 | 401 fileToLoad = |
| 402 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 403 if (fileToLoad == null) { | |
| 130 | 404 // this is the highest we have |
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405 fileToLoad = fileset.getBiggest(); |
| 122 | 406 } |
| 86 | 407 } |
| 181 | 408 logger.info("Loading: " + fileToLoad.getFile()); |
| 73 | 409 |
| 181 | 410 /* |
| 411 * send the image if its mo=(raw)file | |
| 412 */ | |
| 413 if (dlRequest.hasOption("mo", "file") | |
| 414 || dlRequest.hasOption("mo", "rawfile")) { | |
| 415 if (sendFileAllowed) { | |
| 416 String mt = null; | |
| 417 if (dlRequest.hasOption("mo", "rawfile")) { | |
| 418 mt = "application/octet-stream"; | |
| 419 } | |
| 420 ServletOps.sendFile(fileToLoad.getFile(), mt, response); | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 /* | |
| 425 * prepare resolution for original size | |
| 426 */ | |
| 130 | 427 if (absoluteScale) { |
| 428 // get original resolution from metadata | |
| 429 fileset.checkMeta(); | |
| 430 origResX = fileset.getResX(); | |
| 431 origResY = fileset.getResY(); | |
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432 if ((origResX == 0) || (origResY == 0)) { |
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433 throw new ImageOpException("Missing image DPI information!"); |
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434 } |
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435 |
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436 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
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437 throw new ImageOpException("Missing display DPI information!"); |
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438 } |
| 130 | 439 } |
| 440 | |
| 86 | 441 // check the source image |
| 122 | 442 if (!fileToLoad.isChecked()) { |
| 149 | 443 docuInfo.checkFile(fileToLoad); |
| 122 | 444 } |
| 86 | 445 // get the source image type |
| 446 mimeType = fileToLoad.getMimetype(); | |
| 149 | 447 // get the source image size |
| 448 ImageSize imgSize = fileToLoad.getSize(); | |
| 449 | |
| 130 | 450 // decide if the image can be sent as is |
| 451 boolean mimetypeSendable = | |
| 122 | 452 mimeType.equals("image/jpeg") |
| 453 || mimeType.equals("image/png") | |
| 454 || mimeType.equals("image/gif"); | |
| 130 | 455 boolean imagoOptions = |
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456 dlRequest.hasOption("mo", "hmir") |
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457 || dlRequest.hasOption("mo", "vmir") |
| 130 | 458 || (paramROT != 0) |
| 459 || (paramRGBM != null) | |
| 460 || (paramRGBA != null) | |
| 461 || (paramCONT != 0) | |
| 462 || (paramBRGT != 0); | |
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463 boolean imageSendable = mimetypeSendable && !imagoOptions; |
| 73 | 464 |
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465 /* |
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466 * if not autoRes and image smaller than requested size then send |
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467 * as is. if autoRes and image has requested size then send as is. |
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468 * if not autoScale and not scaleToFit nor cropToFit then send as |
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469 * is (mo=file) |
| 73 | 470 */ |
| 181 | 471 if (imageSendable |
| 472 && ((loresOnly | |
| 473 && fileToLoad.getSize().isSmallerThan(expectedSourceSize)) | |
| 474 || (!(loresOnly || hiresOnly) | |
| 475 && fileToLoad.getSize().fitsIn(expectedSourceSize)))) { | |
| 73 | 476 |
| 181 | 477 logger.debug("Sending File as is."); |
| 1 | 478 |
| 181 | 479 ServletOps.sendFile(fileToLoad.getFile(), null, response); |
| 480 | |
| 481 logger.info("Done in " | |
| 73 | 482 + (System.currentTimeMillis() - startTime) |
| 483 + "ms"); | |
| 484 return; | |
| 485 } | |
| 1 | 486 |
| 149 | 487 // new DocuImage instance |
| 488 DocuImage docuImage = dlConfig.getDocuImageInstance(); | |
| 489 if (docuImage == null) { | |
| 490 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 491 } | |
| 492 | |
| 493 // set interpolation quality | |
| 494 docuImage.setQuality(scaleQual); | |
| 181 | 495 |
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496 // set missing dw or dh from aspect ratio |
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497 double imgAspect = fileToLoad.getAspect(); |
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498 if (paramDW == 0) { |
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499 paramDW = (int) Math.round(paramDH * imgAspect); |
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500 } else if (paramDH == 0) { |
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501 paramDH = (int) Math.round(paramDW / imgAspect); |
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502 } |
| 149 | 503 |
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504 /* crop and scale the image */ |
| 1 | 505 |
| 181 | 506 logger.debug("IMG: " + imgSize.getWidth() + "x" + imgSize.getHeight()); |
| 507 logger.debug("time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 508 |
| 73 | 509 // coordinates and scaling |
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510 double areaXoff; |
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511 double areaYoff; |
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512 double areaWidth; |
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513 double areaHeight; |
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514 double scaleX; |
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515 double scaleY; |
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516 double scaleXY; |
| 1 | 517 |
| 100 | 518 // coordinates using Java2D |
| 519 // image size in pixels | |
| 520 Rectangle2D imgBounds = | |
| 149 | 521 new Rectangle2D.Double( |
| 522 0, | |
| 523 0, | |
| 524 imgSize.getWidth(), | |
| 525 imgSize.getHeight()); | |
| 100 | 526 // user window area in [0,1] coordinates |
| 527 Rectangle2D relUserArea = | |
| 528 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 529 // transform from relative [0,1] to image coordinates. | |
| 530 AffineTransform imgTrafo = | |
| 149 | 531 AffineTransform.getScaleInstance( |
| 532 imgSize.getWidth(), | |
| 533 imgSize.getHeight()); | |
| 85 | 534 // transform user coordinate area to image coordinate area |
| 100 | 535 Rectangle2D userImgArea = |
| 536 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 537 | |
| 538 // calculate scaling factors based on inner user area | |
| 73 | 539 if (scaleToFit) { |
| 100 | 540 areaWidth = userImgArea.getWidth(); |
| 541 areaHeight = userImgArea.getHeight(); | |
| 73 | 542 scaleX = paramDW / areaWidth * paramWS; |
| 543 scaleY = paramDH / areaHeight * paramWS; | |
| 544 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 545 } else if (absoluteScale) { |
| 546 // absolute scale | |
| 130 | 547 scaleX = paramDDPIX / origResX; |
| 548 scaleY = paramDDPIY / origResY; | |
| 549 // currently only same scale :-( | |
| 550 scaleXY = scaleX; | |
| 551 areaWidth = paramDW / scaleXY * paramWS; | |
| 552 areaHeight = paramDH / scaleXY * paramWS; | |
| 100 | 553 // reset user area size |
| 554 userImgArea.setRect( | |
| 555 userImgArea.getX(), | |
| 556 userImgArea.getY(), | |
| 557 areaWidth, | |
| 558 areaHeight); | |
| 73 | 559 } else { |
| 560 // crop to fit | |
| 85 | 561 areaWidth = paramDW * paramWS; |
| 562 areaHeight = paramDH * paramWS; | |
| 100 | 563 // reset user area size |
| 564 userImgArea.setRect( | |
| 565 userImgArea.getX(), | |
| 566 userImgArea.getY(), | |
| 567 areaWidth, | |
| 568 areaHeight); | |
| 73 | 569 scaleX = 1f; |
| 570 scaleY = 1f; | |
| 571 scaleXY = 1f; | |
| 100 | 572 } |
| 85 | 573 |
| 100 | 574 // enlarge image area for rotations to cover additional pixels |
| 575 Rectangle2D outerUserImgArea = userImgArea; | |
| 576 Rectangle2D innerUserImgArea = userImgArea; | |
| 577 if (wholeRotArea) { | |
| 578 if (paramROT != 0) { | |
| 579 try { | |
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580 // rotate user area coordinates around center of user |
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581 // area |
| 100 | 582 AffineTransform rotTrafo = |
| 583 AffineTransform.getRotateInstance( | |
| 584 Math.toRadians(paramROT), | |
| 585 userImgArea.getCenterX(), | |
| 586 userImgArea.getCenterY()); | |
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587 // get bounds from rotated end position |
| 100 | 588 innerUserImgArea = |
| 589 rotTrafo | |
| 590 .createTransformedShape(userImgArea) | |
| 591 .getBounds2D(); | |
| 592 // get bounds from back-rotated bounds | |
| 593 outerUserImgArea = | |
| 594 rotTrafo | |
| 595 .createInverse() | |
| 596 .createTransformedShape(innerUserImgArea) | |
| 597 .getBounds2D(); | |
| 598 } catch (NoninvertibleTransformException e1) { | |
| 599 // this shouldn't happen anyway | |
| 600 e1.printStackTrace(); | |
| 601 } | |
| 602 } | |
| 73 | 603 } |
| 1 | 604 |
| 181 | 605 logger.debug("Scale " |
| 73 | 606 + scaleXY |
| 607 + "(" | |
| 608 + scaleX | |
| 609 + "," | |
| 610 + scaleY | |
| 611 + ") on " | |
| 100 | 612 + outerUserImgArea); |
| 1 | 613 |
| 73 | 614 // clip area at the image border |
| 100 | 615 outerUserImgArea = outerUserImgArea.createIntersection(imgBounds); |
| 85 | 616 |
| 100 | 617 areaWidth = outerUserImgArea.getWidth(); |
| 618 areaHeight = outerUserImgArea.getHeight(); | |
| 619 areaXoff = outerUserImgArea.getX(); | |
| 620 areaYoff = outerUserImgArea.getY(); | |
| 1 | 621 |
| 181 | 622 logger.debug("crop: " |
| 73 | 623 + areaXoff |
| 624 + "," | |
| 625 + areaYoff | |
| 626 + " " | |
| 627 + areaWidth | |
| 628 + "x" | |
| 629 + areaHeight); | |
| 1 | 630 |
| 73 | 631 // check image parameters sanity |
| 632 if ((areaWidth < 1) | |
| 633 || (areaHeight < 1) | |
| 634 || (scaleXY * areaWidth < 2) | |
| 635 || (scaleXY * areaHeight < 2)) { | |
| 181 | 636 logger.error("ERROR: invalid scale parameter set!"); |
| 73 | 637 throw new ImageOpException("Invalid scale parameter set!"); |
| 638 } | |
| 1 | 639 |
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640 /* crop and scale image */ |
| 85 | 641 |
| 642 // use subimage loading if possible | |
| 643 if (docuImage.isSubimageSupported()) { | |
| 181 | 644 logger.debug("Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); |
| 85 | 645 double subf = 1d; |
| 646 double subsamp = 1d; | |
| 647 if (scaleXY < 1) { | |
| 648 subf = 1 / scaleXY; | |
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649 // for higher quality reduce subsample factor by |
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650 // minSubsample |
| 140 | 651 if (scaleQual > 0) { |
| 161 | 652 subsamp = Math.max(Math.floor(subf / minSubsample), 1d); |
| 140 | 653 } else { |
| 654 subsamp = Math.floor(subf); | |
| 655 } | |
| 85 | 656 scaleXY = subsamp / subf; |
| 181 | 657 logger.debug("Using subsampling: " + subsamp + " rest " + scaleXY); |
| 85 | 658 } |
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659 |
| 85 | 660 docuImage.loadSubimage( |
| 149 | 661 fileToLoad, |
| 100 | 662 outerUserImgArea.getBounds(), |
| 85 | 663 (int) subsamp); |
| 664 | |
| 181 | 665 logger.debug("SUBSAMP: " |
| 85 | 666 + subsamp |
| 667 + " -> " | |
| 668 + docuImage.getWidth() | |
| 669 + "x" | |
| 670 + docuImage.getHeight()); | |
| 671 | |
| 149 | 672 docuImage.scale(scaleXY, scaleXY); |
| 85 | 673 |
| 674 } else { | |
| 100 | 675 // else load and crop the whole file |
| 149 | 676 docuImage.loadImage(fileToLoad); |
| 85 | 677 docuImage.crop( |
| 678 (int) areaXoff, | |
| 679 (int) areaYoff, | |
| 680 (int) areaWidth, | |
| 681 (int) areaHeight); | |
| 682 | |
| 149 | 683 docuImage.scale(scaleXY, scaleXY); |
| 85 | 684 } |
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685 |
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686 // mirror image |
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687 // operation mode: "hmir": mirror horizontally, "vmir": mirror |
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688 // vertically |
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689 if (dlRequest.hasOption("mo", "hmir")) { |
| 100 | 690 docuImage.mirror(0); |
| 691 } | |
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692 if (dlRequest.hasOption("mo", "vmir")) { |
| 100 | 693 docuImage.mirror(90); |
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694 } |
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695 |
| 100 | 696 // rotate image |
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697 if (paramROT != 0d) { |
| 94 | 698 docuImage.rotate(paramROT); |
| 100 | 699 if (wholeRotArea) { |
| 700 // crop to the inner bounding box | |
| 701 double xcrop = | |
| 702 docuImage.getWidth() | |
| 703 - innerUserImgArea.getWidth() * scaleXY; | |
| 704 double ycrop = | |
| 705 docuImage.getHeight() | |
| 706 - innerUserImgArea.getHeight() * scaleXY; | |
| 707 if ((xcrop > 0) || (ycrop > 0)) { | |
| 708 // only crop smaller | |
| 709 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 710 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 711 // crop image | |
| 712 docuImage.crop( | |
| 713 (int) (xcrop / 2), | |
| 714 (int) (ycrop / 2), | |
| 715 (int) (docuImage.getWidth() - xcrop), | |
| 716 (int) (docuImage.getHeight() - ycrop)); | |
| 717 } | |
| 718 } | |
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719 |
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720 } |
| 1 | 721 |
| 86 | 722 // color modification |
| 723 if ((paramRGBM != null) || (paramRGBA != null)) { | |
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724 // make shure we actually have two arrays |
| 86 | 725 if (paramRGBM == null) { |
| 726 paramRGBM = new float[3]; | |
| 727 } | |
| 728 if (paramRGBA == null) { | |
| 729 paramRGBA = new float[3]; | |
| 730 } | |
| 100 | 731 // calculate "contrast" values (c=2^x) |
| 86 | 732 float[] mult = new float[3]; |
| 733 for (int i = 0; i < 3; i++) { | |
| 94 | 734 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 735 } |
| 736 docuImage.enhanceRGB(mult, paramRGBA); | |
| 737 } | |
| 94 | 738 |
| 100 | 739 // contrast and brightness enhancement |
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740 if ((paramCONT != 0f) || (paramBRGT != 0f)) { |
| 100 | 741 double mult = Math.pow(2, paramCONT); |
| 742 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 743 } | |
| 744 | |
| 181 | 745 logger.debug("time " + (System.currentTimeMillis() - startTime) + "ms"); |
| 73 | 746 |
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747 /* write the resulting image */ |
| 1 | 748 |
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749 // setup output -- if source is JPG then dest will be JPG else it's |
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750 // 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 |
| 181 | 762 logger.info("Done in " + (System.currentTimeMillis() - startTime) + "ms"); |
| 209 | 763 |
| 764 docuImage.dispose(); | |
| 73 | 765 |
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766 /* error handling */ |
| 1 | 767 |
| 73 | 768 } // end of "big" try |
| 156 | 769 catch (IOException e) { |
| 197 | 770 logger.fatal("ERROR: File IO Error: "+e); |
| 73 | 771 try { |
| 772 if (errorMsgHtml) { | |
| 773 ServletOps.htmlMessage( | |
| 774 "ERROR: File IO Error: " + e, | |
| 775 response); | |
| 776 } else { | |
| 181 | 777 ServletOps.sendFile(errorImgFile, null, response); |
| 73 | 778 } |
| 779 } catch (FileOpException ex) { | |
| 780 } // so we don't get a loop | |
| 781 } catch (AuthOpException e) { | |
| 197 | 782 logger.fatal("ERROR: Authorization error: "+e); |
| 73 | 783 try { |
| 784 if (errorMsgHtml) { | |
| 785 ServletOps.htmlMessage( | |
| 786 "ERROR: Authorization error: " + e, | |
| 787 response); | |
| 788 } else { | |
| 181 | 789 ServletOps.sendFile(errorImgFile, null, response); |
| 73 | 790 } |
| 791 } catch (FileOpException ex) { | |
| 792 } // so we don't get a loop | |
| 793 } catch (ImageOpException e) { | |
| 197 | 794 logger.fatal("ERROR: Image Error: "+e); |
| 73 | 795 try { |
| 796 if (errorMsgHtml) { | |
| 797 ServletOps.htmlMessage( | |
| 798 "ERROR: Image Operation Error: " + e, | |
| 799 response); | |
| 800 } else { | |
| 181 | 801 ServletOps.sendFile(errorImgFile, null, response); |
| 73 | 802 } |
| 803 } catch (FileOpException ex) { | |
| 804 } // so we don't get a loop | |
| 805 } catch (RuntimeException e) { | |
| 806 // JAI likes to throw RuntimeExceptions ;-( | |
| 197 | 807 logger.fatal("ERROR: Other Image Error: "+e); |
| 73 | 808 try { |
| 809 if (errorMsgHtml) { | |
| 810 ServletOps.htmlMessage( | |
| 811 "ERROR: Other Image Operation Error: " + e, | |
| 812 response); | |
| 813 } else { | |
| 181 | 814 ServletOps.sendFile(errorImgFile, null, response); |
| 73 | 815 } |
| 816 } catch (FileOpException ex) { | |
| 817 } // so we don't get a loop | |
| 818 } | |
| 819 } | |
| 1 | 820 |
| 73 | 821 } //Scaler class |