Mercurial > hg > digilib-old
annotate servlet/src/digilib/servlet/Scaler.java @ 177:830b0111a0c9
Servlet version 1.17b2
- new mapping file for "virtual directories"
- direct file URLs now work without extension (even with wrong ones)
| author | robcast |
|---|---|
| date | Mon, 10 Nov 2003 21:06:02 +0100 |
| parents | d40922628e4a |
| children | afe7ff98bb71 |
| 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; |
| 161 | 46 import digilib.io.ImageFile; |
| 47 import digilib.io.ImageFileset; | |
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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 /** |
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54 * @author casties */ |
| 1 | 55 //public class Scaler extends HttpServlet implements SingleThreadModel { |
| 56 public class Scaler extends HttpServlet { | |
| 57 | |
| 73 | 58 // digilib servlet version (for all components) |
| 177 | 59 public static final String dlVersion = "1.17b2"; |
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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; | |
| 161 | 71 |
| 153 | 72 // deny image file |
| 73 File denyImgFile; | |
| 74 // error image file | |
| 75 File errorImgFile; | |
| 76 // subsampling before scaling | |
| 77 float minSubsample = 2f; | |
| 78 // send files as is? | |
| 79 boolean sendFileAllowed = true; | |
| 80 // default scaling quality | |
| 81 int defaultQuality = 1; | |
| 1 | 82 |
| 94 | 83 // DigilibConfiguration instance |
| 73 | 84 DigilibConfiguration dlConfig; |
| 1 | 85 |
| 73 | 86 // use authorization database |
| 87 boolean useAuthentication = true; | |
| 1 | 88 |
| 100 | 89 // EXPRIMENTAL |
| 90 // try to enlarge cropping area for "oblique" angles | |
| 91 boolean wholeRotArea = false; | |
| 92 | |
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93 /** |
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94 * Initialisation on first run. |
| 73 | 95 * |
| 96 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig) | |
| 97 */ | |
| 98 public void init(ServletConfig config) throws ServletException { | |
| 99 super.init(config); | |
| 1 | 100 |
| 73 | 101 // Debuggin! |
| 102 //TCTool tctool = new TCTool(); | |
| 153 | 103 |
| 147 | 104 System.out.println( |
| 105 "***** Digital Image Library Servlet (version " | |
| 106 + dlVersion | |
| 107 + ") *****"); | |
| 1 | 108 |
| 73 | 109 // get our ServletContext |
| 110 ServletContext context = config.getServletContext(); | |
| 111 // see if there is a Configuration instance | |
| 112 dlConfig = | |
| 113 (DigilibConfiguration) context.getAttribute( | |
| 86 | 114 "digilib.servlet.configuration"); |
| 73 | 115 if (dlConfig == null) { |
| 116 // create new Configuration | |
| 117 try { | |
| 118 dlConfig = new DigilibConfiguration(config); | |
| 86 | 119 context.setAttribute("digilib.servlet.configuration", dlConfig); |
| 73 | 120 } catch (Exception e) { |
| 121 throw new ServletException(e); | |
| 122 } | |
| 123 } | |
| 124 // first we need an Utils | |
| 125 util = dlConfig.getUtil(); | |
| 126 // set our AuthOps | |
| 153 | 127 useAuthentication = dlConfig.getAsBoolean("use-authorization"); |
| 128 authOp = (AuthOps) dlConfig.getValue("servlet.auth.op"); | |
| 73 | 129 // FileOps instance |
| 130 fileOp = new FileOps(util); | |
| 131 // AuthOps instance | |
| 132 servletOp = new ServletOps(util); | |
| 86 | 133 // DocuDirCache instance |
| 153 | 134 dirCache = (DocuDirCache) dlConfig.getValue("servlet.dir.cache"); |
| 135 denyImgFile = new File(dlConfig.getAsString("denied-image")); | |
| 136 errorImgFile = new File(dlConfig.getAsString("error-image")); | |
| 137 sendFileAllowed = dlConfig.getAsBoolean("sendfile-allowed"); | |
| 138 minSubsample = dlConfig.getAsFloat("subsample-minimum"); | |
| 139 defaultQuality = dlConfig.getAsInt("default-quality"); | |
| 73 | 140 } |
| 1 | 141 |
| 73 | 142 /** Process the HTTP Get request*/ |
| 143 public void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 144 throws ServletException, IOException { | |
| 145 util.dprintln(1, "The servlet has received a GET!"); | |
| 146 // create new request with defaults | |
| 147 DigilibRequest dlReq = new DigilibRequest(); | |
| 148 // set with request parameters | |
| 149 dlReq.setWithRequest(request); | |
| 150 // add DigilibRequest to ServletRequest | |
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151 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 152 // do the processing |
| 153 processRequest(request, response); | |
| 154 } | |
| 1 | 155 |
| 73 | 156 /**Process the HTTP Post request*/ |
| 157 public void doPost( | |
| 158 HttpServletRequest request, | |
| 159 HttpServletResponse response) | |
| 160 throws ServletException, IOException { | |
| 161 util.dprintln(1, "The servlet has received a POST!"); | |
| 162 // create new request with defaults | |
| 163 DigilibRequest dlReq = new DigilibRequest(); | |
| 164 // set with request parameters | |
| 165 dlReq.setWithRequest(request); | |
| 166 // add DigilibRequest to ServletRequest | |
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167 request.setAttribute("digilib.servlet.request", dlReq); |
| 73 | 168 // do the processing |
| 169 processRequest(request, response); | |
| 170 } | |
| 171 | |
| 172 /** main request handler. */ | |
| 173 void processRequest( | |
| 174 HttpServletRequest request, | |
| 175 HttpServletResponse response) | |
| 176 throws ServletException, IOException { | |
| 1 | 177 |
| 73 | 178 // time for benchmarking |
| 179 long startTime = System.currentTimeMillis(); | |
| 180 // output mime/type | |
| 181 String mimeType = "image/png"; | |
| 1 | 182 |
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183 /* parameters for a session */ |
| 1 | 184 |
| 73 | 185 // scale the image file to fit window size i.e. respect dw,dh |
| 186 boolean scaleToFit = true; | |
| 100 | 187 // scale the image by a fixed factor only |
| 188 boolean absoluteScale = false; | |
| 122 | 189 // only crop the image to fit |
| 190 boolean cropToFit = false; | |
| 149 | 191 // send the file as is |
| 192 boolean sendFile = false; | |
| 193 // use low resolution images only | |
| 194 boolean loresOnly = false; | |
| 195 // use hires images only | |
| 122 | 196 boolean hiresOnly = false; |
| 73 | 197 // interpolation to use for scaling |
| 153 | 198 int scaleQual = defaultQuality; |
| 73 | 199 // send html error message (or image file) |
| 200 boolean errorMsgHtml = false; | |
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201 // mirror the image |
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202 boolean doMirror = false; |
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203 // angle of mirror axis |
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204 double mirrorAngle = 0; |
| 130 | 205 // original (hires) image resolution |
| 206 double origResX = 0; | |
| 207 double origResY = 0; | |
| 1 | 208 |
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209 /* request parameters */ |
| 73 | 210 |
| 211 DigilibRequest dlRequest = | |
| 212 (DigilibRequest) request.getAttribute("digilib.servlet.request"); | |
| 1 | 213 |
| 73 | 214 // destination image width |
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215 int paramDW = dlRequest.getAsInt("dw"); |
| 73 | 216 // destination image height |
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217 int paramDH = dlRequest.getAsInt("dh"); |
| 73 | 218 // relative area x_offset (0..1) |
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219 double paramWX = dlRequest.getAsFloat("wx"); |
| 73 | 220 // relative area y_offset |
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221 double paramWY = dlRequest.getAsFloat("wy"); |
| 73 | 222 // relative area width (0..1) |
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223 double paramWW = dlRequest.getAsFloat("ww"); |
| 73 | 224 // relative area height |
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225 double paramWH = dlRequest.getAsFloat("wh"); |
| 73 | 226 // scale factor (additional to dw/width, dh/height) |
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227 double paramWS = dlRequest.getAsFloat("ws"); |
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228 // rotation angle |
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229 double paramROT = dlRequest.getAsFloat("rot"); |
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230 // contrast enhancement |
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231 float paramCONT = dlRequest.getAsFloat("cont"); |
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232 // brightness enhancement |
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233 float paramBRGT = dlRequest.getAsFloat("brgt"); |
| 86 | 234 // color modification |
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235 float[] paramRGBM = null; |
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236 Parameter p = dlRequest.get("rgbm"); |
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237 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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238 paramRGBM = p.parseAsFloatArray("/"); |
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239 } |
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240 float[] paramRGBA = null; |
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241 p = dlRequest.get("rgba"); |
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242 if (p.hasValue() && (!p.getAsString().equals("0/0/0"))) { |
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243 paramRGBA = p.parseAsFloatArray("/"); |
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244 } |
| 130 | 245 // destination resolution (DPI) |
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246 float paramDDPIX = dlRequest.getAsFloat("ddpix"); |
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247 float paramDDPIY = dlRequest.getAsFloat("ddpiy"); |
| 130 | 248 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
| 249 // if X or Y resolution isn't set, use DDPI | |
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250 paramDDPIX = dlRequest.getAsFloat("ddpi"); |
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251 paramDDPIY = paramDDPIX; |
| 130 | 252 } |
| 1 | 253 |
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254 /* |
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255 * operation mode: "fit": always fit to page, "clip": send original |
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256 * resolution cropped, "file": send whole file (if allowed) |
| 73 | 257 */ |
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258 if (dlRequest.hasOption("mo", "clip")) { |
| 73 | 259 scaleToFit = false; |
| 100 | 260 absoluteScale = false; |
| 73 | 261 cropToFit = true; |
| 149 | 262 sendFile = false; |
| 263 hiresOnly = true; | |
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264 } else if (dlRequest.hasOption("mo", "fit")) { |
| 73 | 265 scaleToFit = true; |
| 100 | 266 absoluteScale = false; |
| 122 | 267 cropToFit = false; |
| 149 | 268 sendFile = false; |
| 269 hiresOnly = false; | |
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270 } else if (dlRequest.hasOption("mo", "osize")) { |
| 100 | 271 scaleToFit = false; |
| 272 absoluteScale = true; | |
| 122 | 273 cropToFit = false; |
| 149 | 274 sendFile = false; |
| 122 | 275 hiresOnly = true; |
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276 } else if (dlRequest.hasOption("mo", "file")) { |
| 73 | 277 scaleToFit = false; |
| 100 | 278 absoluteScale = false; |
| 153 | 279 if (sendFileAllowed) { |
| 73 | 280 cropToFit = false; |
| 149 | 281 sendFile = true; |
| 73 | 282 } else { |
| 122 | 283 // crop to fit if send file not allowed |
| 73 | 284 cropToFit = true; |
| 149 | 285 sendFile = false; |
| 73 | 286 } |
| 122 | 287 hiresOnly = true; |
| 73 | 288 } |
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289 // operation mode: "lores": try to use scaled image, "hires": use |
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290 // unscaled image |
| 149 | 291 // "autores": try best fitting resolution |
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292 if (dlRequest.hasOption("mo", "lores")) { |
| 149 | 293 loresOnly = true; |
| 294 hiresOnly = false; | |
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295 } else if (dlRequest.hasOption("mo", "hires")) { |
| 149 | 296 loresOnly = false; |
| 297 hiresOnly = true; | |
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298 } else if (dlRequest.hasOption("mo", "autores")) { |
| 149 | 299 loresOnly = false; |
| 300 hiresOnly = false; | |
| 301 } | |
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302 // operation mode: "errtxt": error message in html, "errimg": error |
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303 // image |
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304 if (dlRequest.hasOption("mo", "errtxt")) { |
| 73 | 305 errorMsgHtml = true; |
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306 } else if (dlRequest.hasOption("mo", "errimg")) { |
| 73 | 307 errorMsgHtml = false; |
| 308 } | |
| 309 // operation mode: "q0" - "q2": interpolation quality | |
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310 if (dlRequest.hasOption("mo", "q0")) { |
| 73 | 311 scaleQual = 0; |
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312 } else if (dlRequest.hasOption("mo", "q1")) { |
| 73 | 313 scaleQual = 1; |
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314 } else if (dlRequest.hasOption("mo", "q2")) { |
| 73 | 315 scaleQual = 2; |
| 316 } | |
| 1 | 317 |
| 73 | 318 //"big" try for all file/image actions |
| 319 try { | |
| 320 | |
| 161 | 321 // ImageFileset of the image to load |
| 322 ImageFileset fileset = null; | |
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323 |
| 122 | 324 // new DocuInfo instance |
| 149 | 325 DocuInfo docuInfo = new ImageLoaderImageInfoDocuInfo(); |
| 73 | 326 |
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327 /* find the file to load/send */ |
| 1 | 328 |
| 73 | 329 // get PathInfo |
| 330 String loadPathName = dlRequest.getFilePath(); | |
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331 |
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332 /* check permissions */ |
| 73 | 333 if (useAuthentication) { |
| 334 // get a list of required roles (empty if no restrictions) | |
| 335 List rolesRequired = authOp.rolesForPath(loadPathName, request); | |
| 336 if (rolesRequired != null) { | |
| 337 util.dprintln(1, "Role required: " + rolesRequired); | |
| 338 util.dprintln(2, "User: " + request.getRemoteUser()); | |
| 339 // is the current request/user authorized? | |
| 340 if (!authOp.isRoleAuthorized(rolesRequired, request)) { | |
| 341 // send deny answer and abort | |
| 342 util.dprintln(1, "ERROR: access denied!"); | |
| 343 if (errorMsgHtml) { | |
| 344 ServletOps.htmlMessage( | |
| 345 "ERROR: Unauthorized access!", | |
| 346 response); | |
| 347 } else { | |
| 153 | 348 servletOp.sendFile(denyImgFile, response); |
| 73 | 349 } |
| 350 return; | |
| 351 } | |
| 352 } | |
| 353 } | |
| 1 | 354 |
| 122 | 355 // find the file(set) |
| 161 | 356 ImageFile fileToLoad; |
| 357 fileset = | |
| 358 (ImageFileset) dirCache.getFile( | |
| 359 loadPathName, | |
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360 dlRequest.getAsInt("pn"), |
| 161 | 361 FileOps.CLASS_IMAGE); |
| 94 | 362 if (fileset == null) { |
| 363 throw new FileOpException( | |
| 364 "File " | |
| 365 + loadPathName | |
| 366 + "(" | |
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367 + dlRequest.getAsInt("pn") |
| 94 | 368 + ") not found."); |
| 369 } | |
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370 |
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371 /* calculate expected source image size */ |
| 149 | 372 ImageSize expectedSourceSize = new ImageSize(); |
| 122 | 373 if (scaleToFit) { |
| 374 double scale = (1 / Math.min(paramWW, paramWH)) * paramWS; | |
| 149 | 375 expectedSourceSize.setSize( |
| 376 (int) (paramDW * scale), | |
| 377 (int) (paramDH * scale)); | |
| 122 | 378 } else { |
| 379 expectedSourceSize.setSize( | |
| 149 | 380 (int) (paramDW * paramWS), |
| 381 (int) (paramDH * paramWS)); | |
| 100 | 382 } |
| 383 | |
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384 /* select a resolution */ |
| 149 | 385 if (hiresOnly) { |
| 386 // get first element (= highest resolution) | |
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387 fileToLoad = fileset.getBiggest(); |
| 149 | 388 } else if (loresOnly) { |
| 389 // enforced lores uses next smaller resolution | |
| 390 fileToLoad = | |
| 391 fileset.getNextSmaller(expectedSourceSize, docuInfo); | |
| 392 if (fileToLoad == null) { | |
| 393 // this is the smallest we have | |
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394 fileToLoad = fileset.getSmallest(); |
| 149 | 395 } |
| 396 } else { | |
| 130 | 397 // autores: use next higher resolution |
| 122 | 398 fileToLoad = |
| 399 fileset.getNextBigger(expectedSourceSize, docuInfo); | |
| 400 if (fileToLoad == null) { | |
| 130 | 401 // this is the highest we have |
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402 fileToLoad = fileset.getBiggest(); |
| 122 | 403 } |
| 86 | 404 } |
| 405 util.dprintln(1, "Loading: " + fileToLoad.getFile()); | |
| 73 | 406 |
| 130 | 407 if (absoluteScale) { |
| 408 // get original resolution from metadata | |
| 409 fileset.checkMeta(); | |
| 410 origResX = fileset.getResX(); | |
| 411 origResY = fileset.getResY(); | |
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412 if ((origResX == 0) || (origResY == 0)) { |
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413 throw new ImageOpException("Missing image DPI information!"); |
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414 } |
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415 |
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416 if ((paramDDPIX == 0) || (paramDDPIY == 0)) { |
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417 throw new ImageOpException("Missing display DPI information!"); |
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418 } |
| 130 | 419 } |
| 420 | |
| 86 | 421 // check the source image |
| 122 | 422 if (!fileToLoad.isChecked()) { |
| 149 | 423 docuInfo.checkFile(fileToLoad); |
| 122 | 424 } |
| 86 | 425 // get the source image type |
| 426 mimeType = fileToLoad.getMimetype(); | |
| 149 | 427 // get the source image size |
| 428 ImageSize imgSize = fileToLoad.getSize(); | |
| 429 | |
| 130 | 430 // decide if the image can be sent as is |
| 431 boolean mimetypeSendable = | |
| 122 | 432 mimeType.equals("image/jpeg") |
| 433 || mimeType.equals("image/png") | |
| 434 || mimeType.equals("image/gif"); | |
| 130 | 435 boolean imagoOptions = |
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436 dlRequest.hasOption("mo", "hmir") |
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437 || dlRequest.hasOption("mo", "vmir") |
| 130 | 438 || (paramROT != 0) |
| 439 || (paramRGBM != null) | |
| 440 || (paramRGBA != null) | |
| 441 || (paramCONT != 0) | |
| 442 || (paramBRGT != 0); | |
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443 boolean imageSendable = mimetypeSendable && !imagoOptions; |
| 73 | 444 |
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445 /* |
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446 * if not autoRes and image smaller than requested size then send |
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447 * as is. if autoRes and image has requested size then send as is. |
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448 * if not autoScale and not scaleToFit nor cropToFit then send as |
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449 * is (mo=file) |
| 73 | 450 */ |
| 149 | 451 if ((loresOnly |
| 122 | 452 && imageSendable |
| 149 | 453 && fileToLoad.getSize().isSmallerThan(expectedSourceSize)) |
| 153 | 454 || (!(loresOnly || hiresOnly) |
| 455 && fileToLoad.getSize().fitsIn(expectedSourceSize)) | |
| 149 | 456 || sendFile) { |
| 73 | 457 |
| 458 util.dprintln(1, "Sending File as is."); | |
| 1 | 459 |
| 86 | 460 servletOp.sendFile(fileToLoad.getFile(), response); |
| 1 | 461 |
| 73 | 462 util.dprintln( |
| 463 1, | |
| 464 "Done in " | |
| 465 + (System.currentTimeMillis() - startTime) | |
| 466 + "ms"); | |
| 467 return; | |
| 468 } | |
| 1 | 469 |
| 149 | 470 // new DocuImage instance |
| 471 DocuImage docuImage = dlConfig.getDocuImageInstance(); | |
| 472 if (docuImage == null) { | |
| 473 throw new ImageOpException("Unable to load DocuImage class!"); | |
| 474 } | |
| 475 | |
| 476 // set interpolation quality | |
| 477 docuImage.setQuality(scaleQual); | |
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478 |
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479 // set missing dw or dh from aspect ratio |
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480 double imgAspect = fileToLoad.getAspect(); |
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481 if (paramDW == 0) { |
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482 paramDW = (int) Math.round(paramDH * imgAspect); |
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483 } else if (paramDH == 0) { |
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484 paramDH = (int) Math.round(paramDW / imgAspect); |
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485 } |
| 149 | 486 |
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487 /* crop and scale the image */ |
| 1 | 488 |
| 149 | 489 util.dprintln( |
| 490 2, | |
| 491 "IMG: " + imgSize.getWidth() + "x" + imgSize.getHeight()); | |
| 73 | 492 util.dprintln( |
| 493 2, | |
| 494 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 1 | 495 |
| 73 | 496 // coordinates and scaling |
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497 double areaXoff; |
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498 double areaYoff; |
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499 double areaWidth; |
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500 double areaHeight; |
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501 double scaleX; |
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502 double scaleY; |
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503 double scaleXY; |
| 1 | 504 |
| 100 | 505 // coordinates using Java2D |
| 506 // image size in pixels | |
| 507 Rectangle2D imgBounds = | |
| 149 | 508 new Rectangle2D.Double( |
| 509 0, | |
| 510 0, | |
| 511 imgSize.getWidth(), | |
| 512 imgSize.getHeight()); | |
| 100 | 513 // user window area in [0,1] coordinates |
| 514 Rectangle2D relUserArea = | |
| 515 new Rectangle2D.Double(paramWX, paramWY, paramWW, paramWH); | |
| 516 // transform from relative [0,1] to image coordinates. | |
| 517 AffineTransform imgTrafo = | |
| 149 | 518 AffineTransform.getScaleInstance( |
| 519 imgSize.getWidth(), | |
| 520 imgSize.getHeight()); | |
| 85 | 521 // transform user coordinate area to image coordinate area |
| 100 | 522 Rectangle2D userImgArea = |
| 523 imgTrafo.createTransformedShape(relUserArea).getBounds2D(); | |
| 524 | |
| 525 // calculate scaling factors based on inner user area | |
| 73 | 526 if (scaleToFit) { |
| 100 | 527 areaWidth = userImgArea.getWidth(); |
| 528 areaHeight = userImgArea.getHeight(); | |
| 73 | 529 scaleX = paramDW / areaWidth * paramWS; |
| 530 scaleY = paramDH / areaHeight * paramWS; | |
| 531 scaleXY = (scaleX > scaleY) ? scaleY : scaleX; | |
| 100 | 532 } else if (absoluteScale) { |
| 533 // absolute scale | |
| 130 | 534 scaleX = paramDDPIX / origResX; |
| 535 scaleY = paramDDPIY / origResY; | |
| 536 // currently only same scale :-( | |
| 537 scaleXY = scaleX; | |
| 538 areaWidth = paramDW / scaleXY * paramWS; | |
| 539 areaHeight = paramDH / scaleXY * paramWS; | |
| 100 | 540 // reset user area size |
| 541 userImgArea.setRect( | |
| 542 userImgArea.getX(), | |
| 543 userImgArea.getY(), | |
| 544 areaWidth, | |
| 545 areaHeight); | |
| 73 | 546 } else { |
| 547 // crop to fit | |
| 85 | 548 areaWidth = paramDW * paramWS; |
| 549 areaHeight = paramDH * paramWS; | |
| 100 | 550 // reset user area size |
| 551 userImgArea.setRect( | |
| 552 userImgArea.getX(), | |
| 553 userImgArea.getY(), | |
| 554 areaWidth, | |
| 555 areaHeight); | |
| 73 | 556 scaleX = 1f; |
| 557 scaleY = 1f; | |
| 558 scaleXY = 1f; | |
| 100 | 559 } |
| 85 | 560 |
| 100 | 561 // enlarge image area for rotations to cover additional pixels |
| 562 Rectangle2D outerUserImgArea = userImgArea; | |
| 563 Rectangle2D innerUserImgArea = userImgArea; | |
| 564 if (wholeRotArea) { | |
| 565 if (paramROT != 0) { | |
| 566 try { | |
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567 // rotate user area coordinates around center of user |
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568 // area |
| 100 | 569 AffineTransform rotTrafo = |
| 570 AffineTransform.getRotateInstance( | |
| 571 Math.toRadians(paramROT), | |
| 572 userImgArea.getCenterX(), | |
| 573 userImgArea.getCenterY()); | |
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574 // get bounds from rotated end position |
| 100 | 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 |
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631 /* crop and scale image */ |
| 85 | 632 |
| 633 // use subimage loading if possible | |
| 634 if (docuImage.isSubimageSupported()) { | |
| 635 System.out.println( | |
| 636 "Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); | |
| 637 double subf = 1d; | |
| 638 double subsamp = 1d; | |
| 639 if (scaleXY < 1) { | |
| 640 subf = 1 / scaleXY; | |
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641 // for higher quality reduce subsample factor by |
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642 // minSubsample |
| 140 | 643 if (scaleQual > 0) { |
| 161 | 644 subsamp = Math.max(Math.floor(subf / minSubsample), 1d); |
| 140 | 645 } else { |
| 646 subsamp = Math.floor(subf); | |
| 647 } | |
| 85 | 648 scaleXY = subsamp / subf; |
| 649 System.out.println( | |
| 650 "Using subsampling: " + subsamp + " rest " + scaleXY); | |
| 651 } | |
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652 |
| 85 | 653 docuImage.loadSubimage( |
| 149 | 654 fileToLoad, |
| 100 | 655 outerUserImgArea.getBounds(), |
| 85 | 656 (int) subsamp); |
| 657 | |
| 658 System.out.println( | |
| 659 "SUBSAMP: " | |
| 660 + subsamp | |
| 661 + " -> " | |
| 662 + docuImage.getWidth() | |
| 663 + "x" | |
| 664 + docuImage.getHeight()); | |
| 665 | |
| 149 | 666 docuImage.scale(scaleXY, scaleXY); |
| 85 | 667 |
| 668 } else { | |
| 100 | 669 // else load and crop the whole file |
| 149 | 670 docuImage.loadImage(fileToLoad); |
| 85 | 671 docuImage.crop( |
| 672 (int) areaXoff, | |
| 673 (int) areaYoff, | |
| 674 (int) areaWidth, | |
| 675 (int) areaHeight); | |
| 676 | |
| 149 | 677 docuImage.scale(scaleXY, scaleXY); |
| 85 | 678 } |
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679 |
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680 // mirror image |
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681 // operation mode: "hmir": mirror horizontally, "vmir": mirror |
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682 // vertically |
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683 if (dlRequest.hasOption("mo", "hmir")) { |
| 100 | 684 docuImage.mirror(0); |
| 685 } | |
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686 if (dlRequest.hasOption("mo", "vmir")) { |
| 100 | 687 docuImage.mirror(90); |
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688 } |
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689 |
| 100 | 690 // rotate image |
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691 if (paramROT != 0d) { |
| 94 | 692 docuImage.rotate(paramROT); |
| 100 | 693 if (wholeRotArea) { |
| 694 // crop to the inner bounding box | |
| 695 double xcrop = | |
| 696 docuImage.getWidth() | |
| 697 - innerUserImgArea.getWidth() * scaleXY; | |
| 698 double ycrop = | |
| 699 docuImage.getHeight() | |
| 700 - innerUserImgArea.getHeight() * scaleXY; | |
| 701 if ((xcrop > 0) || (ycrop > 0)) { | |
| 702 // only crop smaller | |
| 703 xcrop = (xcrop > 0) ? xcrop : 0; | |
| 704 ycrop = (ycrop > 0) ? ycrop : 0; | |
| 705 // crop image | |
| 706 docuImage.crop( | |
| 707 (int) (xcrop / 2), | |
| 708 (int) (ycrop / 2), | |
| 709 (int) (docuImage.getWidth() - xcrop), | |
| 710 (int) (docuImage.getHeight() - ycrop)); | |
| 711 } | |
| 712 } | |
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713 |
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714 } |
| 1 | 715 |
| 86 | 716 // color modification |
| 717 if ((paramRGBM != null) || (paramRGBA != null)) { | |
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718 // make shure we actually have two arrays |
| 86 | 719 if (paramRGBM == null) { |
| 720 paramRGBM = new float[3]; | |
| 721 } | |
| 722 if (paramRGBA == null) { | |
| 723 paramRGBA = new float[3]; | |
| 724 } | |
| 100 | 725 // calculate "contrast" values (c=2^x) |
| 86 | 726 float[] mult = new float[3]; |
| 727 for (int i = 0; i < 3; i++) { | |
| 94 | 728 mult[i] = (float) Math.pow(2, (double) paramRGBM[i]); |
| 86 | 729 } |
| 730 docuImage.enhanceRGB(mult, paramRGBA); | |
| 731 } | |
| 94 | 732 |
| 100 | 733 // contrast and brightness enhancement |
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734 if ((paramCONT != 0f) || (paramBRGT != 0f)) { |
| 100 | 735 double mult = Math.pow(2, paramCONT); |
| 736 docuImage.enhance((float) mult, (float) paramBRGT); | |
| 737 } | |
| 738 | |
| 73 | 739 util.dprintln( |
| 740 2, | |
| 741 "time " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 742 | |
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743 /* write the resulting image */ |
| 1 | 744 |
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745 // setup output -- if source is JPG then dest will be JPG else it's |
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746 // PNG |
| 100 | 747 if (mimeType.equals("image/jpeg") |
| 748 || mimeType.equals("image/jp2")) { | |
| 749 mimeType = "image/jpeg"; | |
| 750 } else { | |
| 73 | 751 mimeType = "image/png"; |
| 752 } | |
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753 response.setContentType(mimeType); |
| 1 | 754 |
| 73 | 755 // write the image |
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756 docuImage.writeImage(mimeType, response.getOutputStream()); |
| 1 | 757 |
| 73 | 758 util.dprintln( |
| 759 1, | |
| 760 "Done in " + (System.currentTimeMillis() - startTime) + "ms"); | |
| 761 | |
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762 /* error handling */ |
| 1 | 763 |
| 73 | 764 } // end of "big" try |
| 156 | 765 catch (IOException e) { |
| 73 | 766 util.dprintln(1, "ERROR: File IO Error: " + e); |
| 767 try { | |
| 768 if (errorMsgHtml) { | |
| 769 ServletOps.htmlMessage( | |
| 770 "ERROR: File IO Error: " + e, | |
| 771 response); | |
| 772 } else { | |
| 153 | 773 servletOp.sendFile(errorImgFile, response); |
| 73 | 774 } |
| 775 } catch (FileOpException ex) { | |
| 776 } // so we don't get a loop | |
| 777 } catch (AuthOpException e) { | |
| 778 util.dprintln(1, "ERROR: Authorization error: " + e); | |
| 779 try { | |
| 780 if (errorMsgHtml) { | |
| 781 ServletOps.htmlMessage( | |
| 782 "ERROR: Authorization error: " + e, | |
| 783 response); | |
| 784 } else { | |
| 153 | 785 servletOp.sendFile(errorImgFile, response); |
| 73 | 786 } |
| 787 } catch (FileOpException ex) { | |
| 788 } // so we don't get a loop | |
| 789 } catch (ImageOpException e) { | |
| 790 util.dprintln(1, "ERROR: Image Error: " + e); | |
| 791 try { | |
| 792 if (errorMsgHtml) { | |
| 793 ServletOps.htmlMessage( | |
| 794 "ERROR: Image Operation Error: " + e, | |
| 795 response); | |
| 796 } else { | |
| 153 | 797 servletOp.sendFile(errorImgFile, response); |
| 73 | 798 } |
| 799 } catch (FileOpException ex) { | |
| 800 } // so we don't get a loop | |
| 801 } catch (RuntimeException e) { | |
| 802 // JAI likes to throw RuntimeExceptions ;-( | |
| 803 util.dprintln(1, "ERROR: Other Image Error: " + e); | |
| 804 try { | |
| 805 if (errorMsgHtml) { | |
| 806 ServletOps.htmlMessage( | |
| 807 "ERROR: Other Image Operation Error: " + e, | |
| 808 response); | |
| 809 } else { | |
| 153 | 810 servletOp.sendFile(errorImgFile, response); |
| 73 | 811 } |
| 812 } catch (FileOpException ex) { | |
| 813 } // so we don't get a loop | |
| 149 | 814 |
| 73 | 815 } |
| 816 } | |
| 1 | 817 |
| 73 | 818 } //Scaler class |