(function() {
|
|
var debug = false;
|
|
var root = this;
|
|
var EXIF = function(obj) {
|
if (obj instanceof EXIF) return obj;
|
if (!(this instanceof EXIF)) return new EXIF(obj);
|
this.EXIFwrapped = obj;
|
};
|
|
if (typeof exports !== 'undefined') {
|
if (typeof module !== 'undefined' && module.exports) {
|
exports = module.exports = EXIF;
|
}
|
exports.EXIF = EXIF;
|
} else {
|
root.EXIF = EXIF;
|
}
|
|
var ExifTags = EXIF.Tags = {
|
|
// version tags
|
0x9000 : "ExifVersion", // EXIF version
|
0xA000 : "FlashpixVersion", // Flashpix format version
|
|
// colorspace tags
|
0xA001 : "ColorSpace", // Color space information tag
|
|
// image configuration
|
0xA002 : "PixelXDimension", // Valid width of meaningful image
|
0xA003 : "PixelYDimension", // Valid height of meaningful image
|
0x9101 : "ComponentsConfiguration", // Information about channels
|
0x9102 : "CompressedBitsPerPixel", // Compressed bits per pixel
|
|
// user information
|
0x927C : "MakerNote", // Any desired information written by the manufacturer
|
0x9286 : "UserComment", // Comments by user
|
|
// related file
|
0xA004 : "RelatedSoundFile", // Name of related sound file
|
|
// date and time
|
0x9003 : "DateTimeOriginal", // Date and time when the original image was generated
|
0x9004 : "DateTimeDigitized", // Date and time when the image was stored digitally
|
0x9290 : "SubsecTime", // Fractions of seconds for DateTime
|
0x9291 : "SubsecTimeOriginal", // Fractions of seconds for DateTimeOriginal
|
0x9292 : "SubsecTimeDigitized", // Fractions of seconds for DateTimeDigitized
|
|
// picture-taking conditions
|
0x829A : "ExposureTime", // Exposure time (in seconds)
|
0x829D : "FNumber", // F number
|
0x8822 : "ExposureProgram", // Exposure program
|
0x8824 : "SpectralSensitivity", // Spectral sensitivity
|
0x8827 : "ISOSpeedRatings", // ISO speed rating
|
0x8828 : "OECF", // Optoelectric conversion factor
|
0x9201 : "ShutterSpeedValue", // Shutter speed
|
0x9202 : "ApertureValue", // Lens aperture
|
0x9203 : "BrightnessValue", // Value of brightness
|
0x9204 : "ExposureBias", // Exposure bias
|
0x9205 : "MaxApertureValue", // Smallest F number of lens
|
0x9206 : "SubjectDistance", // Distance to subject in meters
|
0x9207 : "MeteringMode", // Metering mode
|
0x9208 : "LightSource", // Kind of light source
|
0x9209 : "Flash", // Flash status
|
0x9214 : "SubjectArea", // Location and area of main subject
|
0x920A : "FocalLength", // Focal length of the lens in mm
|
0xA20B : "FlashEnergy", // Strobe energy in BCPS
|
0xA20C : "SpatialFrequencyResponse", //
|
0xA20E : "FocalPlaneXResolution", // Number of pixels in width direction per FocalPlaneResolutionUnit
|
0xA20F : "FocalPlaneYResolution", // Number of pixels in height direction per FocalPlaneResolutionUnit
|
0xA210 : "FocalPlaneResolutionUnit", // Unit for measuring FocalPlaneXResolution and FocalPlaneYResolution
|
0xA214 : "SubjectLocation", // Location of subject in image
|
0xA215 : "ExposureIndex", // Exposure index selected on camera
|
0xA217 : "SensingMethod", // Image sensor type
|
0xA300 : "FileSource", // Image source (3 == DSC)
|
0xA301 : "SceneType", // Scene type (1 == directly photographed)
|
0xA302 : "CFAPattern", // Color filter array geometric pattern
|
0xA401 : "CustomRendered", // Special processing
|
0xA402 : "ExposureMode", // Exposure mode
|
0xA403 : "WhiteBalance", // 1 = auto white balance, 2 = manual
|
0xA404 : "DigitalZoomRation", // Digital zoom ratio
|
0xA405 : "FocalLengthIn35mmFilm", // Equivalent foacl length assuming 35mm film camera (in mm)
|
0xA406 : "SceneCaptureType", // Type of scene
|
0xA407 : "GainControl", // Degree of overall image gain adjustment
|
0xA408 : "Contrast", // Direction of contrast processing applied by camera
|
0xA409 : "Saturation", // Direction of saturation processing applied by camera
|
0xA40A : "Sharpness", // Direction of sharpness processing applied by camera
|
0xA40B : "DeviceSettingDescription", //
|
0xA40C : "SubjectDistanceRange", // Distance to subject
|
|
// other tags
|
0xA005 : "InteroperabilityIFDPointer",
|
0xA420 : "ImageUniqueID" // Identifier assigned uniquely to each image
|
};
|
|
var TiffTags = EXIF.TiffTags = {
|
0x0100 : "ImageWidth",
|
0x0101 : "ImageHeight",
|
0x8769 : "ExifIFDPointer",
|
0x8825 : "GPSInfoIFDPointer",
|
0xA005 : "InteroperabilityIFDPointer",
|
0x0102 : "BitsPerSample",
|
0x0103 : "Compression",
|
0x0106 : "PhotometricInterpretation",
|
0x0112 : "Orientation",
|
0x0115 : "SamplesPerPixel",
|
0x011C : "PlanarConfiguration",
|
0x0212 : "YCbCrSubSampling",
|
0x0213 : "YCbCrPositioning",
|
0x011A : "XResolution",
|
0x011B : "YResolution",
|
0x0128 : "ResolutionUnit",
|
0x0111 : "StripOffsets",
|
0x0116 : "RowsPerStrip",
|
0x0117 : "StripByteCounts",
|
0x0201 : "JPEGInterchangeFormat",
|
0x0202 : "JPEGInterchangeFormatLength",
|
0x012D : "TransferFunction",
|
0x013E : "WhitePoint",
|
0x013F : "PrimaryChromaticities",
|
0x0211 : "YCbCrCoefficients",
|
0x0214 : "ReferenceBlackWhite",
|
0x0132 : "DateTime",
|
0x010E : "ImageDescription",
|
0x010F : "Make",
|
0x0110 : "Model",
|
0x0131 : "Software",
|
0x013B : "Artist",
|
0x8298 : "Copyright"
|
};
|
|
var GPSTags = EXIF.GPSTags = {
|
0x0000 : "GPSVersionID",
|
0x0001 : "GPSLatitudeRef",
|
0x0002 : "GPSLatitude",
|
0x0003 : "GPSLongitudeRef",
|
0x0004 : "GPSLongitude",
|
0x0005 : "GPSAltitudeRef",
|
0x0006 : "GPSAltitude",
|
0x0007 : "GPSTimeStamp",
|
0x0008 : "GPSSatellites",
|
0x0009 : "GPSStatus",
|
0x000A : "GPSMeasureMode",
|
0x000B : "GPSDOP",
|
0x000C : "GPSSpeedRef",
|
0x000D : "GPSSpeed",
|
0x000E : "GPSTrackRef",
|
0x000F : "GPSTrack",
|
0x0010 : "GPSImgDirectionRef",
|
0x0011 : "GPSImgDirection",
|
0x0012 : "GPSMapDatum",
|
0x0013 : "GPSDestLatitudeRef",
|
0x0014 : "GPSDestLatitude",
|
0x0015 : "GPSDestLongitudeRef",
|
0x0016 : "GPSDestLongitude",
|
0x0017 : "GPSDestBearingRef",
|
0x0018 : "GPSDestBearing",
|
0x0019 : "GPSDestDistanceRef",
|
0x001A : "GPSDestDistance",
|
0x001B : "GPSProcessingMethod",
|
0x001C : "GPSAreaInformation",
|
0x001D : "GPSDateStamp",
|
0x001E : "GPSDifferential"
|
};
|
|
var StringValues = EXIF.StringValues = {
|
ExposureProgram : {
|
0 : "Not defined",
|
1 : "Manual",
|
2 : "Normal program",
|
3 : "Aperture priority",
|
4 : "Shutter priority",
|
5 : "Creative program",
|
6 : "Action program",
|
7 : "Portrait mode",
|
8 : "Landscape mode"
|
},
|
MeteringMode : {
|
0 : "Unknown",
|
1 : "Average",
|
2 : "CenterWeightedAverage",
|
3 : "Spot",
|
4 : "MultiSpot",
|
5 : "Pattern",
|
6 : "Partial",
|
255 : "Other"
|
},
|
LightSource : {
|
0 : "Unknown",
|
1 : "Daylight",
|
2 : "Fluorescent",
|
3 : "Tungsten (incandescent light)",
|
4 : "Flash",
|
9 : "Fine weather",
|
10 : "Cloudy weather",
|
11 : "Shade",
|
12 : "Daylight fluorescent (D 5700 - 7100K)",
|
13 : "Day white fluorescent (N 4600 - 5400K)",
|
14 : "Cool white fluorescent (W 3900 - 4500K)",
|
15 : "White fluorescent (WW 3200 - 3700K)",
|
17 : "Standard light A",
|
18 : "Standard light B",
|
19 : "Standard light C",
|
20 : "D55",
|
21 : "D65",
|
22 : "D75",
|
23 : "D50",
|
24 : "ISO studio tungsten",
|
255 : "Other"
|
},
|
Flash : {
|
0x0000 : "Flash did not fire",
|
0x0001 : "Flash fired",
|
0x0005 : "Strobe return light not detected",
|
0x0007 : "Strobe return light detected",
|
0x0009 : "Flash fired, compulsory flash mode",
|
0x000D : "Flash fired, compulsory flash mode, return light not detected",
|
0x000F : "Flash fired, compulsory flash mode, return light detected",
|
0x0010 : "Flash did not fire, compulsory flash mode",
|
0x0018 : "Flash did not fire, auto mode",
|
0x0019 : "Flash fired, auto mode",
|
0x001D : "Flash fired, auto mode, return light not detected",
|
0x001F : "Flash fired, auto mode, return light detected",
|
0x0020 : "No flash function",
|
0x0041 : "Flash fired, red-eye reduction mode",
|
0x0045 : "Flash fired, red-eye reduction mode, return light not detected",
|
0x0047 : "Flash fired, red-eye reduction mode, return light detected",
|
0x0049 : "Flash fired, compulsory flash mode, red-eye reduction mode",
|
0x004D : "Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected",
|
0x004F : "Flash fired, compulsory flash mode, red-eye reduction mode, return light detected",
|
0x0059 : "Flash fired, auto mode, red-eye reduction mode",
|
0x005D : "Flash fired, auto mode, return light not detected, red-eye reduction mode",
|
0x005F : "Flash fired, auto mode, return light detected, red-eye reduction mode"
|
},
|
SensingMethod : {
|
1 : "Not defined",
|
2 : "One-chip color area sensor",
|
3 : "Two-chip color area sensor",
|
4 : "Three-chip color area sensor",
|
5 : "Color sequential area sensor",
|
7 : "Trilinear sensor",
|
8 : "Color sequential linear sensor"
|
},
|
SceneCaptureType : {
|
0 : "Standard",
|
1 : "Landscape",
|
2 : "Portrait",
|
3 : "Night scene"
|
},
|
SceneType : {
|
1 : "Directly photographed"
|
},
|
CustomRendered : {
|
0 : "Normal process",
|
1 : "Custom process"
|
},
|
WhiteBalance : {
|
0 : "Auto white balance",
|
1 : "Manual white balance"
|
},
|
GainControl : {
|
0 : "None",
|
1 : "Low gain up",
|
2 : "High gain up",
|
3 : "Low gain down",
|
4 : "High gain down"
|
},
|
Contrast : {
|
0 : "Normal",
|
1 : "Soft",
|
2 : "Hard"
|
},
|
Saturation : {
|
0 : "Normal",
|
1 : "Low saturation",
|
2 : "High saturation"
|
},
|
Sharpness : {
|
0 : "Normal",
|
1 : "Soft",
|
2 : "Hard"
|
},
|
SubjectDistanceRange : {
|
0 : "Unknown",
|
1 : "Macro",
|
2 : "Close view",
|
3 : "Distant view"
|
},
|
FileSource : {
|
3 : "DSC"
|
},
|
|
Components : {
|
0 : "",
|
1 : "Y",
|
2 : "Cb",
|
3 : "Cr",
|
4 : "R",
|
5 : "G",
|
6 : "B"
|
}
|
};
|
|
function addEvent(element, event, handler) {
|
if (element.addEventListener) {
|
element.addEventListener(event, handler, false);
|
} else if (element.attachEvent) {
|
element.attachEvent("on" + event, handler);
|
}
|
}
|
|
function imageHasData(img) {
|
return !!(img.exifdata);
|
}
|
|
|
function base64ToArrayBuffer(base64, contentType) {
|
contentType = contentType || base64.match(/^data\:([^\;]+)\;base64,/mi)[1] || ''; // e.g. 'data:image/jpeg;base64,...' => 'image/jpeg'
|
base64 = base64.replace(/^data\:([^\;]+)\;base64,/gmi, '');
|
var binary = atob(base64);
|
var len = binary.length;
|
var buffer = new ArrayBuffer(len);
|
var view = new Uint8Array(buffer);
|
for (var i = 0; i < len; i++) {
|
view[i] = binary.charCodeAt(i);
|
}
|
return buffer;
|
}
|
|
function objectURLToBlob(url, callback) {
|
var http = new XMLHttpRequest();
|
http.open("GET", url, true);
|
http.responseType = "blob";
|
http.onload = function(e) {
|
if (this.status == 200 || this.status === 0) {
|
callback(this.response);
|
}
|
};
|
http.send();
|
}
|
|
function getImageData(img, callback) {
|
function handleBinaryFile(binFile) {
|
var data = findEXIFinJPEG(binFile);
|
var iptcdata = findIPTCinJPEG(binFile);
|
img.exifdata = data || {};
|
img.iptcdata = iptcdata || {};
|
if (callback) {
|
callback.call(img);
|
}
|
}
|
|
if (img.src) {
|
if (/^data\:/i.test(img.src)) { // Data URI
|
var arrayBuffer = base64ToArrayBuffer(img.src);
|
handleBinaryFile(arrayBuffer);
|
|
} else if (/^blob\:/i.test(img.src)) { // Object URL
|
var fileReader = new FileReader();
|
fileReader.onload = function(e) {
|
handleBinaryFile(e.target.result);
|
};
|
objectURLToBlob(img.src, function (blob) {
|
fileReader.readAsArrayBuffer(blob);
|
});
|
} else {
|
var http = new XMLHttpRequest();
|
http.onload = function() {
|
if (this.status == 200 || this.status === 0) {
|
handleBinaryFile(http.response);
|
} else {
|
throw "Could not load image";
|
}
|
http = null;
|
};
|
http.open("GET", img.src, true);
|
http.responseType = "arraybuffer";
|
http.send(null);
|
}
|
} else if (window.FileReader && (img instanceof window.Blob || img instanceof window.File)) {
|
var fileReader = new FileReader();
|
fileReader.onload = function(e) {
|
if (debug) console.log("Got file of length " + e.target.result.byteLength);
|
handleBinaryFile(e.target.result);
|
};
|
|
fileReader.readAsArrayBuffer(img);
|
}
|
}
|
|
function findEXIFinJPEG(file) {
|
var dataView = new DataView(file);
|
|
if (debug) console.log("Got file of length " + file.byteLength);
|
if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) {
|
if (debug) console.log("Not a valid JPEG");
|
return false; // not a valid jpeg
|
}
|
|
var offset = 2,
|
length = file.byteLength,
|
marker;
|
|
while (offset < length) {
|
if (dataView.getUint8(offset) != 0xFF) {
|
if (debug) console.log("Not a valid marker at offset " + offset + ", found: " + dataView.getUint8(offset));
|
return false; // not a valid marker, something is wrong
|
}
|
|
marker = dataView.getUint8(offset + 1);
|
if (debug) console.log(marker);
|
|
// we could implement handling for other markers here,
|
// but we're only looking for 0xFFE1 for EXIF data
|
|
if (marker == 225) {
|
if (debug) console.log("Found 0xFFE1 marker");
|
|
return readEXIFData(dataView, offset + 4, dataView.getUint16(offset + 2) - 2);
|
|
// offset += 2 + file.getShortAt(offset+2, true);
|
|
} else {
|
offset += 2 + dataView.getUint16(offset+2);
|
}
|
|
}
|
|
}
|
|
function findIPTCinJPEG(file) {
|
var dataView = new DataView(file);
|
|
if (debug) console.log("Got file of length " + file.byteLength);
|
if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) {
|
if (debug) console.log("Not a valid JPEG");
|
return false; // not a valid jpeg
|
}
|
|
var offset = 2,
|
length = file.byteLength;
|
|
|
var isFieldSegmentStart = function(dataView, offset){
|
return (
|
dataView.getUint8(offset) === 0x38 &&
|
dataView.getUint8(offset+1) === 0x42 &&
|
dataView.getUint8(offset+2) === 0x49 &&
|
dataView.getUint8(offset+3) === 0x4D &&
|
dataView.getUint8(offset+4) === 0x04 &&
|
dataView.getUint8(offset+5) === 0x04
|
);
|
};
|
|
while (offset < length) {
|
|
if ( isFieldSegmentStart(dataView, offset )){
|
|
// Get the length of the name header (which is padded to an even number of bytes)
|
var nameHeaderLength = dataView.getUint8(offset+7);
|
if(nameHeaderLength % 2 !== 0) nameHeaderLength += 1;
|
// Check for pre photoshop 6 format
|
if(nameHeaderLength === 0) {
|
// Always 4
|
nameHeaderLength = 4;
|
}
|
|
var startOffset = offset + 8 + nameHeaderLength;
|
var sectionLength = dataView.getUint16(offset + 6 + nameHeaderLength);
|
|
return readIPTCData(file, startOffset, sectionLength);
|
|
break;
|
|
}
|
|
|
// Not the marker, continue searching
|
offset++;
|
|
}
|
|
}
|
var IptcFieldMap = {
|
0x78 : 'caption',
|
0x6E : 'credit',
|
0x19 : 'keywords',
|
0x37 : 'dateCreated',
|
0x50 : 'byline',
|
0x55 : 'bylineTitle',
|
0x7A : 'captionWriter',
|
0x69 : 'headline',
|
0x74 : 'copyright',
|
0x0F : 'category'
|
};
|
function readIPTCData(file, startOffset, sectionLength){
|
var dataView = new DataView(file);
|
var data = {};
|
var fieldValue, fieldName, dataSize, segmentType, segmentSize;
|
var segmentStartPos = startOffset;
|
while(segmentStartPos < startOffset+sectionLength) {
|
if(dataView.getUint8(segmentStartPos) === 0x1C && dataView.getUint8(segmentStartPos+1) === 0x02){
|
segmentType = dataView.getUint8(segmentStartPos+2);
|
if(segmentType in IptcFieldMap) {
|
dataSize = dataView.getInt16(segmentStartPos+3);
|
segmentSize = dataSize + 5;
|
fieldName = IptcFieldMap[segmentType];
|
fieldValue = getStringFromDB(dataView, segmentStartPos+5, dataSize);
|
// Check if we already stored a value with this name
|
if(data.hasOwnProperty(fieldName)) {
|
// Value already stored with this name, create multivalue field
|
if(data[fieldName] instanceof Array) {
|
data[fieldName].push(fieldValue);
|
}
|
else {
|
data[fieldName] = [data[fieldName], fieldValue];
|
}
|
}
|
else {
|
data[fieldName] = fieldValue;
|
}
|
}
|
|
}
|
segmentStartPos++;
|
}
|
return data;
|
}
|
|
|
|
function readTags(file, tiffStart, dirStart, strings, bigEnd) {
|
var entries = file.getUint16(dirStart, !bigEnd),
|
tags = {},
|
entryOffset, tag,
|
i;
|
|
for (i=0;i<entries;i++) {
|
entryOffset = dirStart + i*12 + 2;
|
tag = strings[file.getUint16(entryOffset, !bigEnd)];
|
if (!tag && debug) console.log("Unknown tag: " + file.getUint16(entryOffset, !bigEnd));
|
tags[tag] = readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd);
|
}
|
return tags;
|
}
|
|
|
function readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd) {
|
var type = file.getUint16(entryOffset+2, !bigEnd),
|
numValues = file.getUint32(entryOffset+4, !bigEnd),
|
valueOffset = file.getUint32(entryOffset+8, !bigEnd) + tiffStart,
|
offset,
|
vals, val, n,
|
numerator, denominator;
|
|
switch (type) {
|
case 1: // byte, 8-bit unsigned int
|
case 7: // undefined, 8-bit byte, value depending on field
|
if (numValues == 1) {
|
return file.getUint8(entryOffset + 8, !bigEnd);
|
} else {
|
offset = numValues > 4 ? valueOffset : (entryOffset + 8);
|
vals = [];
|
for (n=0;n<numValues;n++) {
|
vals[n] = file.getUint8(offset + n);
|
}
|
return vals;
|
}
|
|
case 2: // ascii, 8-bit byte
|
offset = numValues > 4 ? valueOffset : (entryOffset + 8);
|
return getStringFromDB(file, offset, numValues-1);
|
|
case 3: // short, 16 bit int
|
if (numValues == 1) {
|
return file.getUint16(entryOffset + 8, !bigEnd);
|
} else {
|
offset = numValues > 2 ? valueOffset : (entryOffset + 8);
|
vals = [];
|
for (n=0;n<numValues;n++) {
|
vals[n] = file.getUint16(offset + 2*n, !bigEnd);
|
}
|
return vals;
|
}
|
|
case 4: // long, 32 bit int
|
if (numValues == 1) {
|
return file.getUint32(entryOffset + 8, !bigEnd);
|
} else {
|
vals = [];
|
for (n=0;n<numValues;n++) {
|
vals[n] = file.getUint32(valueOffset + 4*n, !bigEnd);
|
}
|
return vals;
|
}
|
|
case 5: // rational = two long values, first is numerator, second is denominator
|
if (numValues == 1) {
|
numerator = file.getUint32(valueOffset, !bigEnd);
|
denominator = file.getUint32(valueOffset+4, !bigEnd);
|
val = new Number(numerator / denominator);
|
val.numerator = numerator;
|
val.denominator = denominator;
|
return val;
|
} else {
|
vals = [];
|
for (n=0;n<numValues;n++) {
|
numerator = file.getUint32(valueOffset + 8*n, !bigEnd);
|
denominator = file.getUint32(valueOffset+4 + 8*n, !bigEnd);
|
vals[n] = new Number(numerator / denominator);
|
vals[n].numerator = numerator;
|
vals[n].denominator = denominator;
|
}
|
return vals;
|
}
|
|
case 9: // slong, 32 bit signed int
|
if (numValues == 1) {
|
return file.getInt32(entryOffset + 8, !bigEnd);
|
} else {
|
vals = [];
|
for (n=0;n<numValues;n++) {
|
vals[n] = file.getInt32(valueOffset + 4*n, !bigEnd);
|
}
|
return vals;
|
}
|
|
case 10: // signed rational, two slongs, first is numerator, second is denominator
|
if (numValues == 1) {
|
return file.getInt32(valueOffset, !bigEnd) / file.getInt32(valueOffset+4, !bigEnd);
|
} else {
|
vals = [];
|
for (n=0;n<numValues;n++) {
|
vals[n] = file.getInt32(valueOffset + 8*n, !bigEnd) / file.getInt32(valueOffset+4 + 8*n, !bigEnd);
|
}
|
return vals;
|
}
|
}
|
}
|
|
function getStringFromDB(buffer, start, length) {
|
var outstr = "";
|
for (n = start; n < start+length; n++) {
|
outstr += String.fromCharCode(buffer.getUint8(n));
|
}
|
return outstr;
|
}
|
|
function readEXIFData(file, start) {
|
if (getStringFromDB(file, start, 4) != "Exif") {
|
if (debug) console.log("Not valid EXIF data! " + getStringFromDB(file, start, 4));
|
return false;
|
}
|
|
var bigEnd,
|
tags, tag,
|
exifData, gpsData,
|
tiffOffset = start + 6;
|
|
// test for TIFF validity and endianness
|
if (file.getUint16(tiffOffset) == 0x4949) {
|
bigEnd = false;
|
} else if (file.getUint16(tiffOffset) == 0x4D4D) {
|
bigEnd = true;
|
} else {
|
if (debug) console.log("Not valid TIFF data! (no 0x4949 or 0x4D4D)");
|
return false;
|
}
|
|
if (file.getUint16(tiffOffset+2, !bigEnd) != 0x002A) {
|
if (debug) console.log("Not valid TIFF data! (no 0x002A)");
|
return false;
|
}
|
|
var firstIFDOffset = file.getUint32(tiffOffset+4, !bigEnd);
|
|
if (firstIFDOffset < 0x00000008) {
|
if (debug) console.log("Not valid TIFF data! (First offset less than 8)", file.getUint32(tiffOffset+4, !bigEnd));
|
return false;
|
}
|
|
tags = readTags(file, tiffOffset, tiffOffset + firstIFDOffset, TiffTags, bigEnd);
|
|
if (tags.ExifIFDPointer) {
|
exifData = readTags(file, tiffOffset, tiffOffset + tags.ExifIFDPointer, ExifTags, bigEnd);
|
for (tag in exifData) {
|
switch (tag) {
|
case "LightSource" :
|
case "Flash" :
|
case "MeteringMode" :
|
case "ExposureProgram" :
|
case "SensingMethod" :
|
case "SceneCaptureType" :
|
case "SceneType" :
|
case "CustomRendered" :
|
case "WhiteBalance" :
|
case "GainControl" :
|
case "Contrast" :
|
case "Saturation" :
|
case "Sharpness" :
|
case "SubjectDistanceRange" :
|
case "FileSource" :
|
exifData[tag] = StringValues[tag][exifData[tag]];
|
break;
|
|
case "ExifVersion" :
|
case "FlashpixVersion" :
|
exifData[tag] = String.fromCharCode(exifData[tag][0], exifData[tag][1], exifData[tag][2], exifData[tag][3]);
|
break;
|
|
case "ComponentsConfiguration" :
|
exifData[tag] =
|
StringValues.Components[exifData[tag][0]] +
|
StringValues.Components[exifData[tag][1]] +
|
StringValues.Components[exifData[tag][2]] +
|
StringValues.Components[exifData[tag][3]];
|
break;
|
}
|
tags[tag] = exifData[tag];
|
}
|
}
|
|
if (tags.GPSInfoIFDPointer) {
|
gpsData = readTags(file, tiffOffset, tiffOffset + tags.GPSInfoIFDPointer, GPSTags, bigEnd);
|
for (tag in gpsData) {
|
switch (tag) {
|
case "GPSVersionID" :
|
gpsData[tag] = gpsData[tag][0] +
|
"." + gpsData[tag][1] +
|
"." + gpsData[tag][2] +
|
"." + gpsData[tag][3];
|
break;
|
}
|
tags[tag] = gpsData[tag];
|
}
|
}
|
|
return tags;
|
}
|
|
EXIF.getData = function(img, callback) {
|
if ((img instanceof Image || img instanceof HTMLImageElement) && !img.complete) return false;
|
|
if (!imageHasData(img)) {
|
getImageData(img, callback);
|
} else {
|
if (callback) {
|
callback.call(img);
|
}
|
}
|
return true;
|
}
|
|
EXIF.getTag = function(img, tag) {
|
if (!imageHasData(img)) return;
|
return img.exifdata[tag];
|
}
|
|
EXIF.getAllTags = function(img) {
|
if (!imageHasData(img)) return {};
|
var a,
|
data = img.exifdata,
|
tags = {};
|
for (a in data) {
|
if (data.hasOwnProperty(a)) {
|
tags[a] = data[a];
|
}
|
}
|
return tags;
|
}
|
|
EXIF.pretty = function(img) {
|
if (!imageHasData(img)) return "";
|
var a,
|
data = img.exifdata,
|
strPretty = "";
|
for (a in data) {
|
if (data.hasOwnProperty(a)) {
|
if (typeof data[a] == "object") {
|
if (data[a] instanceof Number) {
|
strPretty += a + " : " + data[a] + " [" + data[a].numerator + "/" + data[a].denominator + "]\r\n";
|
} else {
|
strPretty += a + " : [" + data[a].length + " values]\r\n";
|
}
|
} else {
|
strPretty += a + " : " + data[a] + "\r\n";
|
}
|
}
|
}
|
return strPretty;
|
}
|
|
EXIF.readFromBinaryFile = function(file) {
|
return findEXIFinJPEG(file);
|
}
|
|
if (typeof define === 'function' && define.amd) {
|
define('exif-js', [], function() {
|
return EXIF;
|
});
|
}
|
}.call(this));
|
