vendor: 32,120 bytes, lines 1-1058
1(function() { 2 3 var debug = false; 4 5 var root = this; 6 7 var EXIF = function(obj) { 8 if (obj instanceof EXIF) return obj; 9 if (!(this instanceof EXIF)) return new EXIF(obj); 10 this.EXIFwrapped = obj; 11 }; 12 13 if (typeof exports !== 'undefined') { 14 if (typeof module !== 'undefined' && module.exports) { 15 exports = module.exports = EXIF; 16 } 17 exports.EXIF = EXIF; 18 } else { 19 root.EXIF = EXIF; 20 } 21 22 var ExifTags = EXIF.Tags = { 23 24 // version tags 25 0x9000 : "ExifVersion", // EXIF version 26 0xA000 : "FlashpixVersion", // Flashpix format version 27 28 // colorspace tags 29 0xA001 : "ColorSpace", // Color space information tag 30 31 // image configuration 32 0xA002 : "PixelXDimension", // Valid width of meaningful image 33 0xA003 : "PixelYDimension", // Valid height of meaningful image 34 0x9101 : "ComponentsConfiguration", // Information about channels 35 0x9102 : "CompressedBitsPerPixel", // Compressed bits per pixel 36 37 // user information 38 0x927C : "MakerNote", // Any desired information written by the manufacturer 39 0x9286 : "UserComment", // Comments by user 40 41 // related file 42 0xA004 : "RelatedSoundFile", // Name of related sound file 43 44 // date and time 45 0x9003 : "DateTimeOriginal", // Date and time when the original image was generated 46 0x9004 : "DateTimeDigitized", // Date and time when the image was stored digitally 47 0x9290 : "SubsecTime", // Fractions of seconds for DateTime 48 0x9291 : "SubsecTimeOriginal", // Fractions of seconds for DateTimeOriginal 49 0x9292 : "SubsecTimeDigitized", // Fractions of seconds for DateTimeDigitized 50 51 // picture-taking conditions 52 0x829A : "ExposureTime", // Exposure time (in seconds) 53 0x829D : "FNumber", // F number 54 0x8822 : "ExposureProgram", // Exposure program 55 0x8824 : "SpectralSensitivity", // Spectral sensitivity 56 0x8827 : "ISOSpeedRatings", // ISO speed rating 57 0x8828 : "OECF", // Optoelectric conversion factor 58 0x9201 : "ShutterSpeedValue", // Shutter speed 59 0x9202 : "ApertureValue", // Lens aperture 60 0x9203 : "BrightnessValue", // Value of brightness 61 0x9204 : "ExposureBias", // Exposure bias 62 0x9205 : "MaxApertureValue", // Smallest F number of lens 63 0x9206 : "SubjectDistance", // Distance to subject in meters 64 0x9207 : "MeteringMode", // Metering mode 65 0x9208 : "LightSource", // Kind of light source 66 0x9209 : "Flash", // Flash status 67 0x9214 : "SubjectArea", // Location and area of main subject 68 0x920A : "FocalLength", // Focal length of the lens in mm 69 0xA20B : "FlashEnergy", // Strobe energy in BCPS 70 0xA20C : "SpatialFrequencyResponse", // 71 0xA20E : "FocalPlaneXResolution", // Number of pixels in width direction per FocalPlaneResolutionUnit 72 0xA20F : "FocalPlaneYResolution", // Number of pixels in height direction per FocalPlaneResolutionUnit 73 0xA210 : "FocalPlaneResolutionUnit", // Unit for measuring FocalPlaneXResolution and FocalPlaneYResolution 74 0xA214 : "SubjectLocation", // Location of subject in image 75 0xA215 : "ExposureIndex", // Exposure index selected on camera 76 0xA217 : "SensingMethod", // Image sensor type 77 0xA300 : "FileSource", // Image source (3 == DSC) 78 0xA301 : "SceneType", // Scene type (1 == directly photographed) 79 0xA302 : "CFAPattern", // Color filter array geometric pattern 80 0xA401 : "CustomRendered", // Special processing 81 0xA402 : "ExposureMode", // Exposure mode 82 0xA403 : "WhiteBalance", // 1 = auto white balance, 2 = manual 83 0xA404 : "DigitalZoomRation", // Digital zoom ratio 84 0xA405 : "FocalLengthIn35mmFilm", // Equivalent foacl length assuming 35mm film camera (in mm) 85 0xA406 : "SceneCaptureType", // Type of scene 86 0xA407 : "GainControl", // Degree of overall image gain adjustment 87 0xA408 : "Contrast", // Direction of contrast processing applied by camera 88 0xA409 : "Saturation", // Direction of saturation processing applied by camera 89 0xA40A : "Sharpness", // Direction of sharpness processing applied by camera 90 0xA40B : "DeviceSettingDescription", // 91 0xA40C : "SubjectDistanceRange", // Distance to subject 92 93 // other tags 94 0xA005 : "InteroperabilityIFDPointer", 95 0xA420 : "ImageUniqueID" // Identifier assigned uniquely to each image 96 }; 97 98 var TiffTags = EXIF.TiffTags = { 99 0x0100 : "ImageWidth", 100 0x0101 : "ImageHeight", 101 0x8769 : "ExifIFDPointer", 102 0x8825 : "GPSInfoIFDPointer", 103 0xA005 : "InteroperabilityIFDPointer", 104 0x0102 : "BitsPerSample", 105 0x0103 : "Compression", 106 0x0106 : "PhotometricInterpretation", 107 0x0112 : "Orientation", 108 0x0115 : "SamplesPerPixel", 109 0x011C : "PlanarConfiguration", 110 0x0212 : "YCbCrSubSampling", 111 0x0213 : "YCbCrPositioning", 112 0x011A : "XResolution", 113 0x011B : "YResolution", 114 0x0128 : "ResolutionUnit", 115 0x0111 : "StripOffsets", 116 0x0116 : "RowsPerStrip", 117 0x0117 : "StripByteCounts", 118 0x0201 : "JPEGInterchangeFormat", 119 0x0202 : "JPEGInterchangeFormatLength", 120 0x012D : "TransferFunction", 121 0x013E : "WhitePoint", 122 0x013F : "PrimaryChromaticities", 123 0x0211 : "YCbCrCoefficients", 124 0x0214 : "ReferenceBlackWhite", 125 0x0132 : "DateTime", 126 0x010E : "ImageDescription", 127 0x010F : "Make", 128 0x0110 : "Model", 129 0x0131 : "Software", 130 0x013B : "Artist", 131 0x8298 : "Copyright" 132 }; 133 134 var GPSTags = EXIF.GPSTags = { 135 0x0000 : "GPSVersionID", 136 0x0001 : "GPSLatitudeRef", 137 0x0002 : "GPSLatitude", 138 0x0003 : "GPSLongitudeRef", 139 0x0004 : "GPSLongitude", 140 0x0005 : "GPSAltitudeRef", 141 0x0006 : "GPSAltitude", 142 0x0007 : "GPSTimeStamp", 143 0x0008 : "GPSSatellites", 144 0x0009 : "GPSStatus", 145 0x000A : "GPSMeasureMode", 146 0x000B : "GPSDOP", 147 0x000C : "GPSSpeedRef", 148 0x000D : "GPSSpeed", 149 0x000E : "GPSTrackRef", 150 0x000F : "GPSTrack", 151 0x0010 : "GPSImgDirectionRef", 152 0x0011 : "GPSImgDirection", 153 0x0012 : "GPSMapDatum", 154 0x0013 : "GPSDestLatitudeRef", 155 0x0014 : "GPSDestLatitude", 156 0x0015 : "GPSDestLongitudeRef", 157 0x0016 : "GPSDestLongitude", 158 0x0017 : "GPSDestBearingRef", 159 0x0018 : "GPSDestBearing", 160 0x0019 : "GPSDestDistanceRef", 161 0x001A : "GPSDestDistance", 162 0x001B : "GPSProcessingMethod", 163 0x001C : "GPSAreaInformation", 164 0x001D : "GPSDateStamp", 165 0x001E : "GPSDifferential" 166 }; 167 168 // EXIF 2.3 Spec 169 var IFD1Tags = EXIF.IFD1Tags = { 170 0x0100: "ImageWidth", 171 0x0101: "ImageHeight", 172 0x0102: "BitsPerSample", 173 0x0103: "Compression", 174 0x0106: "PhotometricInterpretation", 175 0x0111: "StripOffsets", 176 0x0112: "Orientation", 177 0x0115: "SamplesPerPixel", 178 0x0116: "RowsPerStrip", 179 0x0117: "StripByteCounts", 180 0x011A: "XResolution", 181 0x011B: "YResolution", 182 0x011C: "PlanarConfiguration", 183 0x0128: "ResolutionUnit", 184 0x0201: "JpegIFOffset", // When image format is JPEG, this value show offset to JPEG data stored.(aka "ThumbnailOffset" or "JPEGInterchangeFormat") 185 0x0202: "JpegIFByteCount", // When image format is JPEG, this value shows data size of JPEG image (aka "ThumbnailLength" or "JPEGInterchangeFormatLength") 186 0x0211: "YCbCrCoefficients", 187 0x0212: "YCbCrSubSampling", 188 0x0213: "YCbCrPositioning", 189 0x0214: "ReferenceBlackWhite" 190 }; 191 192 var StringValues = EXIF.StringValues = { 193 ExposureProgram : { 194 0 : "Not defined", 195 1 : "Manual", 196 2 : "Normal program", 197 3 : "Aperture priority", 198 4 : "Shutter priority", 199 5 : "Creative program", 200 6 : "Action program", 201 7 : "Portrait mode", 202 8 : "Landscape mode" 203 }, 204 MeteringMode : { 205 0 : "Unknown", 206 1 : "Average", 207 2 : "CenterWeightedAverage", 208 3 : "Spot", 209 4 : "MultiSpot", 210 5 : "Pattern", 211 6 : "Partial", 212 255 : "Other" 213 }, 214 LightSource : { 215 0 : "Unknown", 216 1 : "Daylight", 217 2 : "Fluorescent", 218 3 : "Tungsten (incandescent light)", 219 4 : "Flash", 220 9 : "Fine weather", 221 10 : "Cloudy weather", 222 11 : "Shade", 223 12 : "Daylight fluorescent (D 5700 - 7100K)", 224 13 : "Day white fluorescent (N 4600 - 5400K)", 225 14 : "Cool white fluorescent (W 3900 - 4500K)", 226 15 : "White fluorescent (WW 3200 - 3700K)", 227 17 : "Standard light A", 228 18 : "Standard light B", 229 19 : "Standard light C", 230 20 : "D55", 231 21 : "D65", 232 22 : "D75", 233 23 : "D50", 234 24 : "ISO studio tungsten", 235 255 : "Other" 236 }, 237 Flash : { 238 0x0000 : "Flash did not fire", 239 0x0001 : "Flash fired", 240 0x0005 : "Strobe return light not detected", 241 0x0007 : "Strobe return light detected", 242 0x0009 : "Flash fired, compulsory flash mode", 243 0x000D : "Flash fired, compulsory flash mode, return light not detected", 244 0x000F : "Flash fired, compulsory flash mode, return light detected", 245 0x0010 : "Flash did not fire, compulsory flash mode", 246 0x0018 : "Flash did not fire, auto mode", 247 0x0019 : "Flash fired, auto mode", 248 0x001D : "Flash fired, auto mode, return light not detected", 249 0x001F : "Flash fired, auto mode, return light detected", 250 0x0020 : "No flash function", 251 0x0041 : "Flash fired, red-eye reduction mode", 252 0x0045 : "Flash fired, red-eye reduction mode, return light not detected", 253 0x0047 : "Flash fired, red-eye reduction mode, return light detected", 254 0x0049 : "Flash fired, compulsory flash mode, red-eye reduction mode", 255 0x004D : "Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected", 256 0x004F : "Flash fired, compulsory flash mode, red-eye reduction mode, return light detected", 257 0x0059 : "Flash fired, auto mode, red-eye reduction mode", 258 0x005D : "Flash fired, auto mode, return light not detected, red-eye reduction mode", 259 0x005F : "Flash fired, auto mode, return light detected, red-eye reduction mode" 260 }, 261 SensingMethod : { 262 1 : "Not defined", 263 2 : "One-chip color area sensor", 264 3 : "Two-chip color area sensor", 265 4 : "Three-chip color area sensor", 266 5 : "Color sequential area sensor", 267 7 : "Trilinear sensor", 268 8 : "Color sequential linear sensor" 269 }, 270 SceneCaptureType : { 271 0 : "Standard", 272 1 : "Landscape", 273 2 : "Portrait", 274 3 : "Night scene" 275 }, 276 SceneType : { 277 1 : "Directly photographed" 278 }, 279 CustomRendered : { 280 0 : "Normal process", 281 1 : "Custom process" 282 }, 283 WhiteBalance : { 284 0 : "Auto white balance", 285 1 : "Manual white balance" 286 }, 287 GainControl : { 288 0 : "None", 289 1 : "Low gain up", 290 2 : "High gain up", 291 3 : "Low gain down", 292 4 : "High gain down" 293 }, 294 Contrast : { 295 0 : "Normal", 296 1 : "Soft", 297 2 : "Hard" 298 }, 299 Saturation : { 300 0 : "Normal", 301 1 : "Low saturation", 302 2 : "High saturation" 303 }, 304 Sharpness : { 305 0 : "Normal", 306 1 : "Soft", 307 2 : "Hard" 308 }, 309 SubjectDistanceRange : { 310 0 : "Unknown", 311 1 : "Macro", 312 2 : "Close view", 313 3 : "Distant view" 314 }, 315 FileSource : { 316 3 : "DSC" 317 }, 318 319 Components : { 320 0 : "", 321 1 : "Y", 322 2 : "Cb", 323 3 : "Cr", 324 4 : "R", 325 5 : "G", 326 6 : "B" 327 } 328 }; 329 330 function addEvent(element, event, handler) { 331 if (element.addEventListener) { 332 element.addEventListener(event, handler, false); 333 } else if (element.attachEvent) { 334 element.attachEvent("on" + event, handler); 335 } 336 } 337 338 function imageHasData(img) { 339 return !!(img.exifdata); 340 } 341 342 343 function base64ToArrayBuffer(base64, contentType) { 344 contentType = contentType || base64.match(/^data\:([^\;]+)\;base64,/mi)[1] || ''; // e.g. 'data:image/jpeg;base64,...' => 'image/jpeg' 345 base64 = base64.replace(/^data\:([^\;]+)\;base64,/gmi, ''); 346 var binary = atob(base64); 347 var len = binary.length; 348 var buffer = new ArrayBuffer(len); 349 var view = new Uint8Array(buffer); 350 for (var i = 0; i < len; i++) { 351 view[i] = binary.charCodeAt(i); 352 } 353 return buffer; 354 } 355 356 function objectURLToBlob(url, callback) { 357 var http = new XMLHttpRequest(); 358 http.open("GET", url, true); 359 http.responseType = "blob"; 360 http.onload = function(e) { 361 if (this.status == 200 || this.status === 0) { 362 callback(this.response); 363 } 364 }; 365 http.send(); 366 } 367 368 function getImageData(img, callback) { 369 function handleBinaryFile(binFile) { 370 var data = findEXIFinJPEG(binFile); 371 img.exifdata = data || {}; 372 var iptcdata = findIPTCinJPEG(binFile); 373 img.iptcdata = iptcdata || {}; 374 if (EXIF.isXmpEnabled) { 375 var xmpdata= findXMPinJPEG(binFile); 376 img.xmpdata = xmpdata || {}; 377 } 378 if (callback) { 379 callback.call(img); 380 } 381 } 382 383 if (img.src) { 384 if (/^data\:/i.test(img.src)) { // Data URI 385 var arrayBuffer = base64ToArrayBuffer(img.src); 386 handleBinaryFile(arrayBuffer); 387 388 } else if (/^blob\:/i.test(img.src)) { // Object URL 389 var fileReader = new FileReader(); 390 fileReader.onload = function(e) { 391 handleBinaryFile(e.target.result); 392 }; 393 objectURLToBlob(img.src, function (blob) { 394 fileReader.readAsArrayBuffer(blob); 395 }); 396 } else { 397 var http = new XMLHttpRequest(); 398 http.onload = function() { 399 if (this.status == 200 || this.status === 0) { 400 handleBinaryFile(http.response); 401 } else { 402 throw "Could not load image"; 403 } 404 http = null; 405 }; 406 http.open("GET", img.src, true); 407 http.responseType = "arraybuffer"; 408 http.send(null); 409 } 410 } else if (self.FileReader && (img instanceof self.Blob || img instanceof self.File)) { 411 var fileReader = new FileReader(); 412 fileReader.onload = function(e) { 413 if (debug) console.log("Got file of length " + e.target.result.byteLength); 414 handleBinaryFile(e.target.result); 415 }; 416 417 fileReader.readAsArrayBuffer(img); 418 } 419 } 420 421 function findEXIFinJPEG(file) { 422 var dataView = new DataView(file); 423 424 if (debug) console.log("Got file of length " + file.byteLength); 425 if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) { 426 if (debug) console.log("Not a valid JPEG"); 427 return false; // not a valid jpeg 428 } 429 430 var offset = 2, 431 length = file.byteLength, 432 marker; 433 434 while (offset < length) { 435 if (dataView.getUint8(offset) != 0xFF) { 436 if (debug) console.log("Not a valid marker at offset " + offset + ", found: " + dataView.getUint8(offset)); 437 return false; // not a valid marker, something is wrong 438 } 439 440 marker = dataView.getUint8(offset + 1); 441 if (debug) console.log(marker); 442 443 // we could implement handling for other markers here, 444 // but we're only looking for 0xFFE1 for EXIF data 445 446 if (marker == 225) { 447 if (debug) console.log("Found 0xFFE1 marker"); 448 449 return readEXIFData(dataView, offset + 4, dataView.getUint16(offset + 2) - 2); 450 451 // offset += 2 + file.getShortAt(offset+2, true); 452 453 } else { 454 offset += 2 + dataView.getUint16(offset+2); 455 } 456 457 } 458 459 } 460 461 function findIPTCinJPEG(file) { 462 var dataView = new DataView(file); 463 464 if (debug) console.log("Got file of length " + file.byteLength); 465 if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) { 466 if (debug) console.log("Not a valid JPEG"); 467 return false; // not a valid jpeg 468 } 469 470 var offset = 2, 471 length = file.byteLength; 472 473 474 var isFieldSegmentStart = function(dataView, offset){ 475 return ( 476 dataView.getUint8(offset) === 0x38 && 477 dataView.getUint8(offset+1) === 0x42 && 478 dataView.getUint8(offset+2) === 0x49 && 479 dataView.getUint8(offset+3) === 0x4D && 480 dataView.getUint8(offset+4) === 0x04 && 481 dataView.getUint8(offset+5) === 0x04 482 ); 483 }; 484 485 while (offset < length) { 486 487 if ( isFieldSegmentStart(dataView, offset )){ 488 489 // Get the length of the name header (which is padded to an even number of bytes) 490 var nameHeaderLength = dataView.getUint8(offset+7); 491 if(nameHeaderLength % 2 !== 0) nameHeaderLength += 1; 492 // Check for pre photoshop 6 format 493 if(nameHeaderLength === 0) { 494 // Always 4 495 nameHeaderLength = 4; 496 } 497 498 var startOffset = offset + 8 + nameHeaderLength; 499 var sectionLength = dataView.getUint16(offset + 6 + nameHeaderLength); 500 501 return readIPTCData(file, startOffset, sectionLength); 502 503 break; 504 505 } 506 507 508 // Not the marker, continue searching 509 offset++; 510 511 } 512 513 } 514 var IptcFieldMap = { 515 0x78 : 'caption', 516 0x6E : 'credit', 517 0x19 : 'keywords', 518 0x37 : 'dateCreated', 519 0x50 : 'byline', 520 0x55 : 'bylineTitle', 521 0x7A : 'captionWriter', 522 0x69 : 'headline', 523 0x74 : 'copyright', 524 0x0F : 'category' 525 }; 526 function readIPTCData(file, startOffset, sectionLength){ 527 var dataView = new DataView(file); 528 var data = {}; 529 var fieldValue, fieldName, dataSize, segmentType, segmentSize; 530 var segmentStartPos = startOffset; 531 while(segmentStartPos < startOffset+sectionLength) { 532 if(dataView.getUint8(segmentStartPos) === 0x1C && dataView.getUint8(segmentStartPos+1) === 0x02){ 533 segmentType = dataView.getUint8(segmentStartPos+2); 534 if(segmentType in IptcFieldMap) { 535 dataSize = dataView.getInt16(segmentStartPos+3); 536 segmentSize = dataSize + 5; 537 fieldName = IptcFieldMap[segmentType]; 538 fieldValue = getStringFromDB(dataView, segmentStartPos+5, dataSize); 539 // Check if we already stored a value with this name 540 if(data.hasOwnProperty(fieldName)) { 541 // Value already stored with this name, create multivalue field 542 if(data[fieldName] instanceof Array) { 543 data[fieldName].push(fieldValue); 544 } 545 else { 546 data[fieldName] = [data[fieldName], fieldValue]; 547 } 548 } 549 else { 550 data[fieldName] = fieldValue; 551 } 552 } 553 554 } 555 segmentStartPos++; 556 } 557 return data; 558 } 559 560 561 562 function readTags(file, tiffStart, dirStart, strings, bigEnd) { 563 var entries = file.getUint16(dirStart, !bigEnd), 564 tags = {}, 565 entryOffset, tag, 566 i; 567 568 for (i=0;i<entries;i++) { 569 entryOffset = dirStart + i*12 + 2; 570 tag = strings[file.getUint16(entryOffset, !bigEnd)]; 571 if (!tag && debug) console.log("Unknown tag: " + file.getUint16(entryOffset, !bigEnd)); 572 tags[tag] = readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd); 573 } 574 return tags; 575 } 576 577 578 function readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd) { 579 var type = file.getUint16(entryOffset+2, !bigEnd), 580 numValues = file.getUint32(entryOffset+4, !bigEnd), 581 valueOffset = file.getUint32(entryOffset+8, !bigEnd) + tiffStart, 582 offset, 583 vals, val, n, 584 numerator, denominator; 585 586 switch (type) { 587 case 1: // byte, 8-bit unsigned int 588 case 7: // undefined, 8-bit byte, value depending on field 589 if (numValues == 1) { 590 return file.getUint8(entryOffset + 8, !bigEnd); 591 } else { 592 offset = numValues > 4 ? valueOffset : (entryOffset + 8); 593 vals = []; 594 for (n=0;n<numValues;n++) { 595 vals[n] = file.getUint8(offset + n); 596 } 597 return vals; 598 } 599 600 case 2: // ascii, 8-bit byte 601 offset = numValues > 4 ? valueOffset : (entryOffset + 8); 602 return getStringFromDB(file, offset, numValues-1); 603 604 case 3: // short, 16 bit int 605 if (numValues == 1) { 606 return file.getUint16(entryOffset + 8, !bigEnd); 607 } else { 608 offset = numValues > 2 ? valueOffset : (entryOffset + 8); 609 vals = []; 610 for (n=0;n<numValues;n++) { 611 vals[n] = file.getUint16(offset + 2*n, !bigEnd); 612 } 613 return vals; 614 } 615 616 case 4: // long, 32 bit int 617 if (numValues == 1) { 618 return file.getUint32(entryOffset + 8, !bigEnd); 619 } else { 620 vals = []; 621 for (n=0;n<numValues;n++) { 622 vals[n] = file.getUint32(valueOffset + 4*n, !bigEnd); 623 } 624 return vals; 625 } 626 627 case 5: // rational = two long values, first is numerator, second is denominator 628 if (numValues == 1) { 629 numerator = file.getUint32(valueOffset, !bigEnd); 630 denominator = file.getUint32(valueOffset+4, !bigEnd); 631 val = new Number(numerator / denominator); 632 val.numerator = numerator; 633 val.denominator = denominator; 634 return val; 635 } else { 636 vals = []; 637 for (n=0;n<numValues;n++) { 638 numerator = file.getUint32(valueOffset + 8*n, !bigEnd); 639 denominator = file.getUint32(valueOffset+4 + 8*n, !bigEnd); 640 vals[n] = new Number(numerator / denominator); 641 vals[n].numerator = numerator; 642 vals[n].denominator = denominator; 643 } 644 return vals; 645 } 646 647 case 9: // slong, 32 bit signed int 648 if (numValues == 1) { 649 return file.getInt32(entryOffset + 8, !bigEnd); 650 } else { 651 vals = []; 652 for (n=0;n<numValues;n++) { 653 vals[n] = file.getInt32(valueOffset + 4*n, !bigEnd); 654 } 655 return vals; 656 } 657 658 case 10: // signed rational, two slongs, first is numerator, second is denominator 659 if (numValues == 1) { 660 return file.getInt32(valueOffset, !bigEnd) / file.getInt32(valueOffset+4, !bigEnd); 661 } else { 662 vals = []; 663 for (n=0;n<numValues;n++) { 664 vals[n] = file.getInt32(valueOffset + 8*n, !bigEnd) / file.getInt32(valueOffset+4 + 8*n, !bigEnd); 665 } 666 return vals; 667 } 668 } 669 } 670 671 /** 672 * Given an IFD (Image File Directory) start offset 673 * returns an offset to next IFD or 0 if it's the last IFD. 674 */ 675 function getNextIFDOffset(dataView, dirStart, bigEnd){ 676 //the first 2bytes means the number of directory entries contains in this IFD 677 var entries = dataView.getUint16(dirStart, !bigEnd); 678 679 // After last directory entry, there is a 4bytes of data, 680 // it means an offset to next IFD. 681 // If its value is '0x00000000', it means this is the last IFD and there is no linked IFD. 682 683 return dataView.getUint32(dirStart + 2 + entries * 12, !bigEnd); // each entry is 12 bytes long 684 } 685 686 function readThumbnailImage(dataView, tiffStart, firstIFDOffset, bigEnd){ 687 // get the IFD1 offset 688 var IFD1OffsetPointer = getNextIFDOffset(dataView, tiffStart+firstIFDOffset, bigEnd); 689 690 if (!IFD1OffsetPointer) { 691 // console.log('******** IFD1Offset is empty, image thumb not found ********'); 692 return {}; 693 } 694 else if (IFD1OffsetPointer > dataView.byteLength) { // this should not happen 695 // console.log('******** IFD1Offset is outside the bounds of the DataView ********'); 696 return {}; 697 } 698 // console.log('******* thumbnail IFD offset (IFD1) is: %s', IFD1OffsetPointer); 699 700 var thumbTags = readTags(dataView, tiffStart, tiffStart + IFD1OffsetPointer, IFD1Tags, bigEnd) 701 702 // EXIF 2.3 specification for JPEG format thumbnail 703 704 // If the value of Compression(0x0103) Tag in IFD1 is '6', thumbnail image format is JPEG. 705 // Most of Exif image uses JPEG format for thumbnail. In that case, you can get offset of thumbnail 706 // by JpegIFOffset(0x0201) Tag in IFD1, size of thumbnail by JpegIFByteCount(0x0202) Tag. 707 // Data format is ordinary JPEG format, starts from 0xFFD8 and ends by 0xFFD9. It seems that 708 // JPEG format and 160x120pixels of size are recommended thumbnail format for Exif2.1 or later. 709 710 if (thumbTags['Compression']) { 711 // console.log('Thumbnail image found!'); 712 713 switch (thumbTags['Compression']) { 714 case 6: 715 // console.log('Thumbnail image format is JPEG'); 716 if (thumbTags.JpegIFOffset && thumbTags.JpegIFByteCount) { 717 // extract the thumbnail 718 var tOffset = tiffStart + thumbTags.JpegIFOffset; 719 var tLength = thumbTags.JpegIFByteCount; 720 thumbTags['blob'] = new Blob([new Uint8Array(dataView.buffer, tOffset, tLength)], { 721 type: 'image/jpeg' 722 }); 723 } 724 break; 725 726 case 1: 727 console.log("Thumbnail image format is TIFF, which is not implemented."); 728 break; 729 default: 730 console.log("Unknown thumbnail image format '%s'", thumbTags['Compression']); 731 } 732 } 733 else if (thumbTags['PhotometricInterpretation'] == 2) { 734 console.log("Thumbnail image format is RGB, which is not implemented."); 735 } 736 return thumbTags; 737 } 738 739 function getStringFromDB(buffer, start, length) { 740 var outstr = ""; 741 for (var n = start; n < start+length; n++) { 742 outstr += String.fromCharCode(buffer.getUint8(n)); 743 } 744 return outstr; 745 } 746 747 function readEXIFData(file, start) { 748 if (getStringFromDB(file, start, 4) != "Exif") { 749 if (debug) console.log("Not valid EXIF data! " + getStringFromDB(file, start, 4)); 750 return false; 751 } 752 753 var bigEnd, 754 tags, tag, 755 exifData, gpsData, 756 tiffOffset = start + 6; 757 758 // test for TIFF validity and endianness 759 if (file.getUint16(tiffOffset) == 0x4949) { 760 bigEnd = false; 761 } else if (file.getUint16(tiffOffset) == 0x4D4D) { 762 bigEnd = true; 763 } else { 764 if (debug) console.log("Not valid TIFF data! (no 0x4949 or 0x4D4D)"); 765 return false; 766 } 767 768 if (file.getUint16(tiffOffset+2, !bigEnd) != 0x002A) { 769 if (debug) console.log("Not valid TIFF data! (no 0x002A)"); 770 return false; 771 } 772 773 var firstIFDOffset = file.getUint32(tiffOffset+4, !bigEnd); 774 775 if (firstIFDOffset < 0x00000008) { 776 if (debug) console.log("Not valid TIFF data! (First offset less than 8)", file.getUint32(tiffOffset+4, !bigEnd)); 777 return false; 778 } 779 780 tags = readTags(file, tiffOffset, tiffOffset + firstIFDOffset, TiffTags, bigEnd); 781 782 if (tags.ExifIFDPointer) { 783 exifData = readTags(file, tiffOffset, tiffOffset + tags.ExifIFDPointer, ExifTags, bigEnd); 784 for (tag in exifData) { 785 switch (tag) { 786 case "LightSource" : 787 case "Flash" : 788 case "MeteringMode" : 789 case "ExposureProgram" : 790 case "SensingMethod" : 791 case "SceneCaptureType" : 792 case "SceneType" : 793 case "CustomRendered" : 794 case "WhiteBalance" : 795 case "GainControl" : 796 case "Contrast" : 797 case "Saturation" : 798 case "Sharpness" : 799 case "SubjectDistanceRange" : 800 case "FileSource" : 801 exifData[tag] = StringValues[tag][exifData[tag]]; 802 break; 803 804 case "ExifVersion" : 805 case "FlashpixVersion" : 806 exifData[tag] = String.fromCharCode(exifData[tag][0], exifData[tag][1], exifData[tag][2], exifData[tag][3]); 807 break; 808 809 case "ComponentsConfiguration" : 810 exifData[tag] = 811 StringValues.Components[exifData[tag][0]] + 812 StringValues.Components[exifData[tag][1]] + 813 StringValues.Components[exifData[tag][2]] + 814 StringValues.Components[exifData[tag][3]]; 815 break; 816 } 817 tags[tag] = exifData[tag]; 818 } 819 } 820 821 if (tags.GPSInfoIFDPointer) { 822 gpsData = readTags(file, tiffOffset, tiffOffset + tags.GPSInfoIFDPointer, GPSTags, bigEnd); 823 for (tag in gpsData) { 824 switch (tag) { 825 case "GPSVersionID" : 826 gpsData[tag] = gpsData[tag][0] + 827 "." + gpsData[tag][1] + 828 "." + gpsData[tag][2] + 829 "." + gpsData[tag][3]; 830 break; 831 } 832 tags[tag] = gpsData[tag]; 833 } 834 } 835 836 // extract thumbnail 837 tags['thumbnail'] = readThumbnailImage(file, tiffOffset, firstIFDOffset, bigEnd); 838 839 return tags; 840 } 841 842 function findXMPinJPEG(file) { 843 844 if (!('DOMParser' in self)) { 845 // console.warn('XML parsing not supported without DOMParser'); 846 return; 847 } 848 var dataView = new DataView(file); 849 850 if (debug) console.log("Got file of length " + file.byteLength); 851 if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) { 852 if (debug) console.log("Not a valid JPEG"); 853 return false; // not a valid jpeg 854 } 855 856 var offset = 2, 857 length = file.byteLength, 858 dom = new DOMParser(); 859 860 while (offset < (length-4)) { 861 if (getStringFromDB(dataView, offset, 4) == "http") { 862 var startOffset = offset - 1; 863 var sectionLength = dataView.getUint16(offset - 2) - 1; 864 var xmpString = getStringFromDB(dataView, startOffset, sectionLength) 865 var xmpEndIndex = xmpString.indexOf('xmpmeta>') + 8; 866 xmpString = xmpString.substring( xmpString.indexOf( '<x:xmpmeta' ), xmpEndIndex ); 867 868 var indexOfXmp = xmpString.indexOf('x:xmpmeta') + 10 869 //Many custom written programs embed xmp/xml without any namespace. Following are some of them. 870 //Without these namespaces, XML is thought to be invalid by parsers 871 xmpString = xmpString.slice(0, indexOfXmp) 872 + 'xmlns:Iptc4xmpCore="http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/" ' 873 + 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ' 874 + 'xmlns:tiff="http://ns.adobe.com/tiff/1.0/" ' 875 + 'xmlns:plus="http://schemas.android.com/apk/lib/com.google.android.gms.plus" ' 876 + 'xmlns:ext="http://www.gettyimages.com/xsltExtension/1.0" ' 877 + 'xmlns:exif="http://ns.adobe.com/exif/1.0/" ' 878 + 'xmlns:stEvt="http://ns.adobe.com/xap/1.0/sType/ResourceEvent#" ' 879 + 'xmlns:stRef="http://ns.adobe.com/xap/1.0/sType/ResourceRef#" ' 880 + 'xmlns:crs="http://ns.adobe.com/camera-raw-settings/1.0/" ' 881 + 'xmlns:xapGImg="http://ns.adobe.com/xap/1.0/g/img/" ' 882 + 'xmlns:Iptc4xmpExt="http://iptc.org/std/Iptc4xmpExt/2008-02-29/" ' 883 + xmpString.slice(indexOfXmp) 884 885 var domDocument = dom.parseFromString( xmpString, 'text/xml' ); 886 return xml2Object(domDocument); 887 } else{ 888 offset++; 889 } 890 } 891 } 892 893 function xml2json(xml) { 894 var json = {}; 895 896 if (xml.nodeType == 1) { // element node 897 if (xml.attributes.length > 0) { 898 json['@attributes'] = {}; 899 for (var j = 0; j < xml.attributes.length; j++) { 900 var attribute = xml.attributes.item(j); 901 json['@attributes'][attribute.nodeName] = attribute.nodeValue; 902 } 903 } 904 } else if (xml.nodeType == 3) { // text node 905 return xml.nodeValue; 906 } 907 908 // deal with children 909 if (xml.hasChildNodes()) { 910 for(var i = 0; i < xml.childNodes.length; i++) { 911 var child = xml.childNodes.item(i); 912 var nodeName = child.nodeName; 913 if (json[nodeName] == null) { 914 json[nodeName] = xml2json(child); 915 } else { 916 if (json[nodeName].push == null) { 917 var old = json[nodeName]; 918 json[nodeName] = []; 919 json[nodeName].push(old); 920 } 921 json[nodeName].push(xml2json(child)); 922 } 923 } 924 } 925 926 return json; 927 } 928 929 function xml2Object(xml) { 930 try { 931 var obj = {}; 932 if (xml.children.length > 0) { 933 for (var i = 0; i < xml.children.length; i++) { 934 var item = xml.children.item(i); 935 var attributes = item.attributes; 936 for(var idx in attributes) { 937 var itemAtt = attributes[idx]; 938 var dataKey = itemAtt.nodeName; 939 var dataValue = itemAtt.nodeValue; 940 941 if(dataKey !== undefined) { 942 obj[dataKey] = dataValue; 943 } 944 } 945 var nodeName = item.nodeName; 946 947 if (typeof (obj[nodeName]) == "undefined") { 948 obj[nodeName] = xml2json(item); 949 } else { 950 if (typeof (obj[nodeName].push) == "undefined") { 951 var old = obj[nodeName]; 952 953 obj[nodeName] = []; 954 obj[nodeName].push(old); 955 } 956 obj[nodeName].push(xml2json(item)); 957 } 958 } 959 } else { 960 obj = xml.textContent; 961 } 962 return obj; 963 } catch (e) { 964 console.log(e.message); 965 } 966 } 967 968 EXIF.enableXmp = function() { 969 EXIF.isXmpEnabled = true; 970 } 971 972 EXIF.disableXmp = function() { 973 EXIF.isXmpEnabled = false; 974 } 975 976 EXIF.getData = function(img, callback) { 977 if (((self.Image && img instanceof self.Image) 978 || (self.HTMLImageElement && img instanceof self.HTMLImageElement)) 979 && !img.complete) 980 return false; 981 982 if (!imageHasData(img)) { 983 getImageData(img, callback); 984 } else { 985 if (callback) { 986 callback.call(img); 987 } 988 } 989 return true; 990 } 991 992 EXIF.getTag = function(img, tag) { 993 if (!imageHasData(img)) return; 994 return img.exifdata[tag]; 995 } 996 997 EXIF.getIptcTag = function(img, tag) { 998 if (!imageHasData(img)) return; 999 return img.iptcdata[tag]; 1000 } 1001 1002 EXIF.getAllTags = function(img) { 1003 if (!imageHasData(img)) return {}; 1004 var a, 1005 data = img.exifdata, 1006 tags = {}; 1007 for (a in data) { 1008 if (data.hasOwnProperty(a)) { 1009 tags[a] = data[a]; 1010 } 1011 } 1012 return tags; 1013 } 1014 1015 EXIF.getAllIptcTags = function(img) { 1016 if (!imageHasData(img)) return {}; 1017 var a, 1018 data = img.iptcdata, 1019 tags = {}; 1020 for (a in data) { 1021 if (data.hasOwnProperty(a)) { 1022 tags[a] = data[a]; 1023 } 1024 } 1025 return tags; 1026 } 1027 1028 EXIF.pretty = function(img) { 1029 if (!imageHasData(img)) return ""; 1030 var a, 1031 data = img.exifdata, 1032 strPretty = ""; 1033 for (a in data) { 1034 if (data.hasOwnProperty(a)) { 1035 if (typeof data[a] == "object") { 1036 if (data[a] instanceof Number) { 1037 strPretty += a + " : " + data[a] + " [" + data[a].numerator + "/" + data[a].denominator + "]\r\n"; 1038 } else { 1039 strPretty += a + " : [" + data[a].length + " values]\r\n"; 1040 } 1041 } else { 1042 strPretty += a + " : " + data[a] + "\r\n"; 1043 } 1044 } 1045 } 1046 return strPretty; 1047 } 1048 1049 EXIF.readFromBinaryFile = function(file) { 1050 return findEXIFinJPEG(file); 1051 } 1052 1053 if (typeof define === 'function' && define.amd) { 1054 define('exif-js', [], function() { 1055 return EXIF; 1056 }); 1057 } 1058}.call(this));
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.