@jysd/lrz
Version:
前端本地客户端压缩图片，兼容IOS，Android，PC、自动按需加载文件
1,337 lines (1,170 loc) • 106 kB
JavaScript
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {
__webpack_require__(1);
__webpack_require__(8);
__webpack_require__(9);
module.exports = __webpack_require__(10);
/**
*
* ┏┓ ┏┓
* ┏┛┻━━━┛┻┓
* ┃ ┃
* ┃ ━ ┃
* ┃ ┳┛ ┗┳ ┃
* ┃ ┃
* ┃ ┻ ┃
* ┃ ┃
* ┗━┓ ┏━┛Code is far away from bug with the animal protecting
* ┃ ┃ 神兽保佑,代码无bug
* ┃ ┃
* ┃ ┗━━━┓
* ┃ ┣┓
* ┃ ┏┛
* ┗┓┓┏━┳┓┏┛
* ┃┫┫ ┃┫┫
* ┗┻┛ ┗┻┛
*
*/
/***/ }),
/* 1 */
/***/ (function(module, exports) {
/*! modernizr 3.6.0 (Custom Build) | MIT *
* https://modernizr.com/download/?-exiforientation-setclasses !*/
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/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {
/* WEBPACK VAR INJECTION */(function(setImmediate) {(function (root) {
// Use polyfill for setImmediate for performance gains
var asap = (typeof setImmediate === 'function' && setImmediate) ||
function (fn) {
setTimeout(fn, 1);
};
// Polyfill for Function.prototype.bind
function bind (fn, thisArg) {
return function () {
fn.apply(thisArg, arguments);
}
}
var isArray = Array.isArray || function (value) {
return Object.prototype.toString.call(value) === "[object Array]"
};
function Promise (fn) {
if (typeof this !== 'object') throw new TypeError('Promises must be constructed via new');
if (typeof fn !== 'function') throw new TypeError('not a function');
this._state = null;
this._value = null;
this._deferreds = []
doResolve(fn, bind(resolve, this), bind(reject, this))
}
function handle (deferred) {
var me = this;
if (this._state === null) {
this._deferreds.push(deferred);
return
}
asap(function () {
var cb = me._state ? deferred.onFulfilled : deferred.onRejected
if (cb === null) {
(me._state ? deferred.resolve : deferred.reject)(me._value);
return;
}
var ret;
try {
ret = cb(me._value);
}
catch (e) {
deferred.reject(e);
return;
}
deferred.resolve(ret);
})
}
function resolve (newValue) {
try { //Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
if (newValue === this) throw new TypeError('A promise cannot be resolved with itself.');
if (newValue && (typeof newValue === 'object' || typeof newValue === 'function')) {
var then = newValue.then;
if (typeof then === 'function') {
doResolve(bind(then, newValue), bind(resolve, this), bind(reject, this));
return;
}
}
this._state = true;
this._value = newValue;
finale.call(this);
} catch (e) {
reject.call(this, e);
}
}
function reject (newValue) {
this._state = false;
this._value = newValue;
finale.call(this);
}
function finale () {
for (var i = 0, len = this._deferreds.length; i < len; i++) {
handle.call(this, this._deferreds[i]);
}
this._deferreds = null;
}
function Handler (onFulfilled, onRejected, resolve, reject) {
this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
this.onRejected = typeof onRejected === 'function' ? onRejected : null;
this.resolve = resolve;
this.reject = reject;
}
/**
* Take a potentially misbehaving resolver function and make sure
* onFulfilled and onRejected are only called once.
*
* Makes no guarantees about asynchrony.
*/
function doResolve (fn, onFulfilled, onRejected) {
var done = false;
try {
fn(function (value) {
if (done) return;
done = true;
onFulfilled(value);
}, function (reason) {
if (done) return;
done = true;
onRejected(reason);
})
} catch (ex) {
if (done) return;
done = true;
onRejected(ex);
}
}
Promise.prototype['catch'] = function (onRejected) {
return this.then(null, onRejected);
};
Promise.prototype.then = function (onFulfilled, onRejected) {
var me = this;
return new Promise(function (resolve, reject) {
handle.call(me, new Handler(onFulfilled, onRejected, resolve, reject));
})
};
Promise.all = function () {
var args = Array.prototype.slice.call(arguments.length === 1 && isArray(arguments[0]) ? arguments[0] : arguments);
return new Promise(function (resolve, reject) {
if (args.length === 0) return resolve([]);
var remaining = args.length;
function res (i, val) {
try {
if (val && (typeof val === 'object' || typeof val === 'function')) {
var then = val.then;
if (typeof then === 'function') {
then.call(val, function (val) {
res(i, val)
}, reject);
return;
}
}
args[i] = val;
if (--remaining === 0) {
resolve(args);
}
} catch (ex) {
reject(ex);
}
}
for (var i = 0; i < args.length; i++) {
res(i, args[i]);
}
});
};
Promise.resolve = function (value) {
if (value && typeof value === 'object' && value.constructor === Promise) {
return value;
}
return new Promise(function (resolve) {
resolve(value);
});
};
Promise.reject = function (value) {
return new Promise(function (resolve, reject) {
reject(value);
});
};
Promise.race = function (values) {
return new Promise(function (resolve, reject) {
for (var i = 0, len = values.length; i < len; i++) {
values[i].then(resolve, reject);
}
});
};
/**
* Set the immediate function to execute callbacks
* @param fn {function} Function to execute
* @private
*/
Promise._setImmediateFn = function _setImmediateFn (fn) {
asap = fn;
};
Promise.prototype.always = function (callback) {
var constructor = this.constructor;
return this.then(function (value) {
return constructor.resolve(callback()).then(function () {
return value;
});
}, function (reason) {
return constructor.resolve(callback()).then(function () {
throw reason;
});
});
};
if (typeof module !== 'undefined' && module.exports) {
module.exports = Promise;
} else if (!root.Promise) {
root.Promise = Promise;
}
})(this);
/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(3).setImmediate))
/***/ }),
/* 3 */
/***/ (function(module, exports, __webpack_require__) {
/* WEBPACK VAR INJECTION */(function(global) {var scope = (typeof global !== "undefined" && global) ||
(typeof self !== "undefined" && self) ||
window;
var apply = Function.prototype.apply;
// DOM APIs, for completeness
exports.setTimeout = function() {
return new Timeout(apply.call(setTimeout, scope, arguments), clearTimeout);
};
exports.setInterval = function() {
return new Timeout(apply.call(setInterval, scope, arguments), clearInterval);
};
exports.clearTimeout =
exports.clearInterval = function(timeout) {
if (timeout) {
timeout.close();
}
};
function Timeout(id, clearFn) {
this._id = id;
this._clearFn = clearFn;
}
Timeout.prototype.unref = Timeout.prototype.ref = function() {};
Timeout.prototype.close = function() {
this._clearFn.call(scope, this._id);
};
// Does not start the time, just sets up the members needed.
exports.enroll = function(item, msecs) {
clearTimeout(item._idleTimeoutId);
item._idleTimeout = msecs;
};
exports.unenroll = function(item) {
clearTimeout(item._idleTimeoutId);
item._idleTimeout = -1;
};
exports._unrefActive = exports.active = function(item) {
clearTimeout(item._idleTimeoutId);
var msecs = item._idleTimeout;
if (msecs >= 0) {
item._idleTimeoutId = setTimeout(function onTimeout() {
if (item._onTimeout)
item._onTimeout();
}, msecs);
}
};
// setimmediate attaches itself to the global object
__webpack_require__(4);
// On some exotic environments, it's not clear which object `setimmediate` was
// able to install onto. Search each possibility in the same order as the
// `setimmediate` library.
exports.setImmediate = (typeof self !== "undefined" && self.setImmediate) ||
(typeof global !== "undefined" && global.setImmediate) ||
(this && this.setImmediate);
exports.clearImmediate = (typeof self !== "undefined" && self.clearImmediate) ||
(typeof global !== "undefined" && global.clearImmediate) ||
(this && this.clearImmediate);
/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))
/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {
/* WEBPACK VAR INJECTION */(function(global, process) {(function (global, undefined) {
"use strict";
if (global.setImmediate) {
return;
}
var nextHandle = 1; // Spec says greater than zero
var tasksByHandle = {};
var currentlyRunningATask = false;
var doc = global.document;
var registerImmediate;
function setImmediate(callback) {
// Callback can either be a function or a string
if (typeof callback !== "function") {
callback = new Function("" + callback);
}
// Copy function arguments
var args = new Array(arguments.length - 1);
for (var i = 0; i < args.length; i++) {
args[i] = arguments[i + 1];
}
// Store and register the task
var task = { callback: callback, args: args };
tasksByHandle[nextHandle] = task;
registerImmediate(nextHandle);
return nextHandle++;
}
function clearImmediate(handle) {
delete tasksByHandle[handle];
}
function run(task) {
var callback = task.callback;
var args = task.args;
switch (args.length) {
case 0:
callback();
break;
case 1:
callback(args[0]);
break;
case 2:
callback(args[0], args[1]);
break;
case 3:
callback(args[0], args[1], args[2]);
break;
default:
callback.apply(undefined, args);
break;
}
}
function runIfPresent(handle) {
// From the spec: "Wait until any invocations of this algorithm started before this one have completed."
// So if we're currently running a task, we'll need to delay this invocation.
if (currentlyRunningATask) {
// Delay by doing a setTimeout. setImmediate was tried instead, but in Firefox 7 it generated a
// "too much recursion" error.
setTimeout(runIfPresent, 0, handle);
} else {
var task = tasksByHandle[handle];
if (task) {
currentlyRunningATask = true;
try {
run(task);
} finally {
clearImmediate(handle);
currentlyRunningATask = false;
}
}
}
}
function installNextTickImplementation() {
registerImmediate = function(handle) {
process.nextTick(function () { runIfPresent(handle); });
};
}
function canUsePostMessage() {
// The test against `importScripts` prevents this implementation from being installed inside a web worker,
// where `global.postMessage` means something completely different and can't be used for this purpose.
if (global.postMessage && !global.importScripts) {
var postMessageIsAsynchronous = true;
var oldOnMessage = global.onmessage;
global.onmessage = function() {
postMessageIsAsynchronous = false;
};
global.postMessage("", "*");
global.onmessage = oldOnMessage;
return postMessageIsAsynchronous;
}
}
function installPostMessageImplementation() {
// Installs an event handler on `global` for the `message` event: see
// * https://developer.mozilla.org/en/DOM/window.postMessage
// * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#crossDocumentMessages
var messagePrefix = "setImmediate$" + Math.random() + "$";
var onGlobalMessage = function(event) {
if (event.source === global &&
typeof event.data === "string" &&
event.data.indexOf(messagePrefix) === 0) {
runIfPresent(+event.data.slice(messagePrefix.length));
}
};
if (global.addEventListener) {
global.addEventListener("message", onGlobalMessage, false);
} else {
global.attachEvent("onmessage", onGlobalMessage);
}
registerImmediate = function(handle) {
global.postMessage(messagePrefix + handle, "*");
};
}
function installMessageChannelImplementation() {
var channel = new MessageChannel();
channel.port1.onmessage = function(event) {
var handle = event.data;
runIfPresent(handle);
};
registerImmediate = function(handle) {
channel.port2.postMessage(handle);
};
}
function installReadyStateChangeImplementation() {
var html = doc.documentElement;
registerImmediate = function(handle) {
// Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted
// into the document. Do so, thus queuing up the task. Remember to clean up once it's been called.
var script = doc.createElement("script");
script.onreadystatechange = function () {
runIfPresent(handle);
script.onreadystatechange = null;
html.removeChild(script);
script = null;
};
html.appendChild(script);
};
}
function installSetTimeoutImplementation() {
registerImmediate = function(handle) {
setTimeout(runIfPresent, 0, handle);
};
}
// If supported, we should attach to the prototype of global, since that is where setTimeout et al. live.
var attachTo = Object.getPrototypeOf && Object.getPrototypeOf(global);
attachTo = attachTo && attachTo.setTimeout ? attachTo : global;
// Don't get fooled by e.g. browserify environments.
if ({}.toString.call(global.process) === "[object process]") {
// For Node.js before 0.9
installNextTickImplementation();
} else if (canUsePostMessage()) {
// For non-IE10 modern browsers
installPostMessageImplementation();
} else if (global.MessageChannel) {
// For web workers, where supported
installMessageChannelImplementation();
} else if (doc && "onreadystatechange" in doc.createElement("script")) {
// For IE 6–8
installReadyStateChangeImplementation();
} else {
// For older browsers
installSetTimeoutImplementation();
}
attachTo.setImmediate = setImmediate;
attachTo.clearImmediate = clearImmediate;
}(typeof self === "undefined" ? typeof global === "undefined" ? this : global : self));
/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }()), __webpack_require__(5)))
/***/ }),
/* 5 */
/***/ (function(module, exports) {
// shim for using process in browser
var process = module.exports = {};
// cached from whatever global is present so that test runners that stub it
// don't break things. But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals. It's inside a
// function because try/catches deoptimize in certain engines.
var cachedSetTimeout;
var cachedClearTimeout;
function defaultSetTimout() {
throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
throw new Error('clearTimeout has not been defined');
}
(function () {
try {
if (typeof setTimeout === 'function') {
cachedSetTimeout = setTimeout;
} else {
cachedSetTimeout = defaultSetTimout;
}
} catch (e) {
cachedSetTimeout = defaultSetTimout;
}
try {
if (typeof clearTimeout === 'function') {
cachedClearTimeout = clearTimeout;
} else {
cachedClearTimeout = defaultClearTimeout;
}
} catch (e) {
cachedClearTimeout = defaultClearTimeout;
}
} ())
function runTimeout(fun) {
if (cachedSetTimeout === setTimeout) {
//normal enviroments in sane situations
return setTimeout(fun, 0);
}
// if setTimeout wasn't available but was latter defined
if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
cachedSetTimeout = setTimeout;
return setTimeout(fun, 0);
}
try {
// when when somebody has screwed with setTimeout but no I.E. maddness
return cachedSetTimeout(fun, 0);
} catch(e){
try {
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
return cachedSetTimeout.call(null, fun, 0);
} catch(e){
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
return cachedSetTimeout.call(this, fun, 0);
}
}
}
function runClearTimeout(marker) {
if (cachedClearTimeout === clearTimeout) {
//normal enviroments in sane situations
return clearTimeout(marker);
}
// if clearTimeout wasn't available but was latter defined
if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
cachedClearTimeout = clearTimeout;
return clearTimeout(marker);
}
try {
// when when somebody has screwed with setTimeout but no I.E. maddness
return cachedClearTimeout(marker);
} catch (e){
try {
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
return cachedClearTimeout.call(null, marker);
} catch (e){
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
// Some versions of I.E. have different rules for clearTimeout vs setTimeout
return cachedClearTimeout.call(this, marker);
}
}
}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;
function cleanUpNextTick() {
if (!draining || !currentQueue) {
return;
}
draining = false;
if (currentQueue.length) {
queue = currentQueue.concat(queue);
} else {
queueIndex = -1;
}
if (queue.length) {
drainQueue();
}
}
function drainQueue() {
if (draining) {
return;
}
var timeout = runTimeout(cleanUpNextTick);
draining = true;
var len = queue.length;
while(len) {
currentQueue = queue;
queue = [];
while (++queueIndex < len) {
if (currentQueue) {
currentQueue[queueIndex].run();
}
}
queueIndex = -1;
len = queue.length;
}
currentQueue = null;
draining = false;
runClearTimeout(timeout);
}
process.nextTick = function (fun) {
var args = new Array(arguments.length - 1);
if (arguments.length > 1) {
for (var i = 1; i < arguments.length; i++) {
args[i - 1] = arguments[i];
}
}
queue.push(new Item(fun, args));
if (queue.length === 1 && !draining) {
runTimeout(drainQueue);
}
};
// v8 likes predictible objects
function Item(fun, array) {
this.fun = fun;
this.array = array;
}
Item.prototype.run = function () {
this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};
function noop() {}
process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;
process.listeners = function (name) { return [] }
process.binding = function (name) {
throw new Error('process.binding is not supported');
};
process.cwd = function () { return '/' };
process.chdir = function (dir) {
throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };
/***/ }),
/* 6 */
/***/ (function(module, exports) {
//@source https://xts.so/demo/compress/index.html
// 早期版本的浏览器需要用BlobBuilder来构造Blob，创建一个通用构造器来兼容早期版本
var BlobConstructor = ((function () {
try {
new Blob();
return true;
} catch (e) {
return false;
}
})()) ? window.Blob : function (parts, opts) {
var bb = new (
window.BlobBuilder
|| window.WebKitBlobBuilder
|| window.MSBlobBuilder
|| window.MozBlobBuilder
);
parts.forEach(function (p) {
bb.append(p);
});
return bb.getBlob(opts ? opts.type : undefined);
};
// Android上的AppleWebKit 534以前的内核存在一个Bug，
// 导致FormData加入一个Blob对象后，上传的文件是0字节
function hasFormDataBug () {
var bCheck = ~navigator.userAgent.indexOf('Android')
&& ~navigator.vendor.indexOf('Google')
&& !~navigator.userAgent.indexOf('Chrome');
// QQ X5浏览器也有这个BUG
return bCheck && navigator.userAgent.match(/AppleWebKit\/(\d+)/).pop() <= 534 || /MQQBrowser/g.test(navigator.userAgent);
}
var FormDataShim=(function(){
var formDataShimNums = 0;
function FormDataShim () {
var
// Store a reference to this
o = this,
// Data to be sent
parts = [],
// Boundary parameter for separating the multipart values
boundary = Array(21).join('-') + (+new Date() * (1e16 * Math.random())).toString(36),
// Store the current XHR send method so we can safely override it
oldSend = XMLHttpRequest.prototype.send;
this.getParts = function () {
return parts.toString();
};
this.append = function (name, value, filename) {
parts.push('--' + boundary + '\r\nContent-Disposition: form-data; name="' + name + '"');
if (value instanceof Blob) {
parts.push('; filename="' + (filename || 'blob') + '"\r\nContent-Type: ' + value.type + '\r\n\r\n');
parts.push(value);
}
else {
parts.push('\r\n\r\n' + value);
}
parts.push('\r\n');
};
formDataShimNums++;
XMLHttpRequest.prototype.send = function (val) {
var fr,
data,
oXHR = this;
if (val === o) {
// Append the final boundary string
parts.push('--' + boundary + '--\r\n');
// Create the blob
data = new BlobConstructor(parts);
// Set up and read the blob into an array to be sent
fr = new FileReader();
fr.onload = function () {
oldSend.call(oXHR, fr.result);
};
fr.onerror = function (err) {
throw err;
};
fr.readAsArrayBuffer(data);
// Set the multipart content type and boudary
this.setRequestHeader('Content-Type', 'multipart/form-data; boundary=' + boundary);
formDataShimNums--;
if(formDataShimNums == 0){
XMLHttpRequest.prototype.send = oldSend;
}
}
else {
oldSend.call(this, val);
}
};
};
FormDataShim.prototype = Object.create(FormData.prototype);
return FormDataShim;
})();
module.exports = {
Blob : BlobConstructor,
FormData: hasFormDataBug() ? FormDataShim : FormData
};
/***/ }),
/* 7 */
/***/ (function(module, exports, __webpack_require__) {
var __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;/* exif */
(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 (true) {
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 {
callback(new Error("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(of