vimo-dt
Version:
A Vue2.x UI Project For Mobile & HyBrid
1,107 lines (1,009 loc) • 32.3 kB
JavaScript
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
exports.default = canvasResize;
var EXIF = function () {
var debug = false;
var ExifTags = {
0x9000: 'ExifVersion',
0xa000: 'FlashpixVersion',
0xa001: 'ColorSpace',
0xa002: 'PixelXDimension',
0xa003: 'PixelYDimension',
0x9101: 'ComponentsConfiguration',
0x9102: 'CompressedBitsPerPixel',
0x927c: 'MakerNote',
0x9286: 'UserComment',
0xa004: 'RelatedSoundFile',
0x9003: 'DateTimeOriginal',
0x9004: 'DateTimeDigitized',
0x9290: 'SubsecTime',
0x9291: 'SubsecTimeOriginal',
0x9292: 'SubsecTimeDigitized',
0x829a: 'ExposureTime',
0x829d: 'FNumber',
0x8822: 'ExposureProgram',
0x8824: 'SpectralSensitivity',
0x8827: 'ISOSpeedRatings',
0x8828: 'OECF',
0x9201: 'ShutterSpeedValue',
0x9202: 'ApertureValue',
0x9203: 'BrightnessValue',
0x9204: 'ExposureBias',
0x9205: 'MaxApertureValue',
0x9206: 'SubjectDistance',
0x9207: 'MeteringMode',
0x9208: 'LightSource',
0x9209: 'Flash',
0x9214: 'SubjectArea',
0x920a: 'FocalLength',
0xa20b: 'FlashEnergy',
0xa20c: 'SpatialFrequencyResponse',
0xa20e: 'FocalPlaneXResolution',
0xa20f: 'FocalPlaneYResolution',
0xa210: 'FocalPlaneResolutionUnit',
0xa214: 'SubjectLocation',
0xa215: 'ExposureIndex',
0xa217: 'SensingMethod',
0xa300: 'FileSource',
0xa301: 'SceneType',
0xa302: 'CFAPattern',
0xa401: 'CustomRendered',
0xa402: 'ExposureMode',
0xa403: 'WhiteBalance',
0xa404: 'DigitalZoomRation',
0xa405: 'FocalLengthIn35mmFilm',
0xa406: 'SceneCaptureType',
0xa407: 'GainControl',
0xa408: 'Contrast',
0xa409: 'Saturation',
0xa40a: 'Sharpness',
0xa40b: 'DeviceSettingDescription',
0xa40c: 'SubjectDistanceRange',
0xa005: 'InteroperabilityIFDPointer',
0xa420: 'ImageUniqueID' };
var 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 = {
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 = {
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 getImageData(img, callback) {
BinaryAjax(img.src, function (http) {
var data = findEXIFinJPEG(http.binaryResponse);
img.exifdata = data || {};
if (callback) {
callback.call(img);
}
});
}
function findEXIFinJPEG(file) {
if (file.getByteAt(0) != 0xff || file.getByteAt(1) != 0xd8) {
return false;
}
var offset = 2,
length = file.getLength(),
marker;
while (offset < length) {
if (file.getByteAt(offset) != 0xff) {
if (debug) {
console.log('Not a valid marker at offset ' + offset + ', found: ' + file.getByteAt(offset));
}
return false;
}
marker = file.getByteAt(offset + 1);
if (marker == 22400) {
if (debug) console.log('Found 0xFFE1 marker');
return readEXIFData(file, offset + 4, file.getShortAt(offset + 2, true) - 2);
} else if (marker == 225) {
if (debug) console.log('Found 0xFFE1 marker');
return readEXIFData(file, offset + 4, file.getShortAt(offset + 2, true) - 2);
} else {
offset += 2 + file.getShortAt(offset + 2, true);
}
}
}
function readTags(file, tiffStart, dirStart, strings, bigEnd) {
var entries = file.getShortAt(dirStart, bigEnd),
tags = {},
entryOffset,
tag,
i;
for (i = 0; i < entries; i++) {
entryOffset = dirStart + i * 12 + 2;
tag = strings[file.getShortAt(entryOffset, bigEnd)];
if (!tag && debug) {
console.log('Unknown tag: ' + file.getShortAt(entryOffset, bigEnd));
}
tags[tag] = readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd);
}
return tags;
}
function readTagValue(file, entryOffset, tiffStart, dirStart, bigEnd) {
var type = file.getShortAt(entryOffset + 2, bigEnd),
numValues = file.getLongAt(entryOffset + 4, bigEnd),
valueOffset = file.getLongAt(entryOffset + 8, bigEnd) + tiffStart,
offset,
vals,
val,
n,
numerator,
denominator;
switch (type) {
case 1:
case 7:
if (numValues == 1) {
return file.getByteAt(entryOffset + 8, bigEnd);
} else {
offset = numValues > 4 ? valueOffset : entryOffset + 8;
vals = [];
for (n = 0; n < numValues; n++) {
vals[n] = file.getByteAt(offset + n);
}
return vals;
}
case 2:
offset = numValues > 4 ? valueOffset : entryOffset + 8;
return file.getStringAt(offset, numValues - 1);
case 3:
if (numValues == 1) {
return file.getShortAt(entryOffset + 8, bigEnd);
} else {
offset = numValues > 2 ? valueOffset : entryOffset + 8;
vals = [];
for (n = 0; n < numValues; n++) {
vals[n] = file.getShortAt(offset + 2 * n, bigEnd);
}
return vals;
}
case 4:
if (numValues == 1) {
return file.getLongAt(entryOffset + 8, bigEnd);
} else {
vals = [];
for (var n = 0; n < numValues; n++) {
vals[n] = file.getLongAt(valueOffset + 4 * n, bigEnd);
}
return vals;
}
case 5:
if (numValues == 1) {
numerator = file.getLongAt(valueOffset, bigEnd);
denominator = file.getLongAt(valueOffset + 4, bigEnd);
val = Number(numerator / denominator);
val.numerator = numerator;
val.denominator = denominator;
return val;
} else {
vals = [];
for (n = 0; n < numValues; n++) {
numerator = file.getLongAt(valueOffset + 8 * n, bigEnd);
denominator = file.getLongAt(valueOffset + 4 + 8 * n, bigEnd);
vals[n] = Number(numerator / denominator);
vals[n].numerator = numerator;
vals[n].denominator = denominator;
}
return vals;
}
case 9:
if (numValues == 1) {
return file.getSLongAt(entryOffset + 8, bigEnd);
} else {
vals = [];
for (n = 0; n < numValues; n++) {
vals[n] = file.getSLongAt(valueOffset + 4 * n, bigEnd);
}
return vals;
}
case 10:
if (numValues == 1) {
return file.getSLongAt(valueOffset, bigEnd) / file.getSLongAt(valueOffset + 4, bigEnd);
} else {
vals = [];
for (n = 0; n < numValues; n++) {
vals[n] = file.getSLongAt(valueOffset + 8 * n, bigEnd) / file.getSLongAt(valueOffset + 4 + 8 * n, bigEnd);
}
return vals;
}
}
}
function readEXIFData(file, start) {
if (file.getStringAt(start, 4) != 'Exif') {
if (debug) {
console.log('Not valid EXIF data! ' + file.getStringAt(start, 4));
}
return false;
}
var bigEnd,
tags,
tag,
exifData,
gpsData,
tiffOffset = start + 6;
if (file.getShortAt(tiffOffset) == 0x4949) {
bigEnd = false;
} else if (file.getShortAt(tiffOffset) == 0x4d4d) {
bigEnd = true;
} else {
if (debug) console.log('Not valid TIFF data! (no 0x4949 or 0x4D4D)');
return false;
}
if (file.getShortAt(tiffOffset + 2, bigEnd) != 0x002a) {
if (debug) console.log('Not valid TIFF data! (no 0x002A)');
return false;
}
if (file.getLongAt(tiffOffset + 4, bigEnd) != 0x00000008) {
if (debug) {
console.log('Not valid TIFF data! (First offset not 8)', file.getShortAt(tiffOffset + 4, bigEnd));
}
return false;
}
tags = readTags(file, tiffOffset, tiffOffset + 8, 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;
}
function getData(img, callback) {
if (!img.complete) return false;
if (!imageHasData(img)) {
getImageData(img, callback);
} else {
if (callback) {
callback.call(img);
}
}
return true;
}
function getTag(img, tag) {
if (!imageHasData(img)) return;
return img.exifdata[tag];
}
function getAllTags(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;
}
function pretty(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;
}
function readFromBinaryFile(file) {
return findEXIFinJPEG(file);
}
return {
readFromBinaryFile: readFromBinaryFile,
pretty: pretty,
getTag: getTag,
getAllTags: getAllTags,
getData: getData,
Tags: ExifTags,
TiffTags: TiffTags,
GPSTags: GPSTags,
StringValues: StringValues
};
}();
var BinaryFile = function BinaryFile(strData, iDataOffset, iDataLength) {
var data = strData;
var dataOffset = iDataOffset || 0;
var dataLength = 0;
this.getRawData = function () {
return data;
};
if (typeof strData === 'string') {
dataLength = iDataLength || data.length;
this.getByteAt = function (iOffset) {
return data.charCodeAt(iOffset + dataOffset) & 0xff;
};
this.getBytesAt = function (iOffset, iLength) {
var aBytes = [];
for (var i = 0; i < iLength; i++) {
aBytes[i] = data.charCodeAt(iOffset + i + dataOffset) & 0xff;
}
return aBytes;
};
} else if (typeof strData === 'unknown') {
dataLength = iDataLength || IEBinary_getLength(data);
this.getByteAt = function (iOffset) {
return IEBinary_getByteAt(data, iOffset + dataOffset);
};
this.getBytesAt = function (iOffset, iLength) {
return new VBArray(IEBinary_getBytesAt(data, iOffset + dataOffset, iLength)).toArray();
};
}
this.getLength = function () {
return dataLength;
};
this.getSByteAt = function (iOffset) {
var iByte = this.getByteAt(iOffset);
if (iByte > 127) return iByte - 256;else return iByte;
};
this.getShortAt = function (iOffset, bBigEndian) {
var iShort = bBigEndian ? (this.getByteAt(iOffset) << 8) + this.getByteAt(iOffset + 1) : (this.getByteAt(iOffset + 1) << 8) + this.getByteAt(iOffset);
if (iShort < 0) iShort += 65536;
return iShort;
};
this.getSShortAt = function (iOffset, bBigEndian) {
var iUShort = this.getShortAt(iOffset, bBigEndian);
if (iUShort > 32767) return iUShort - 65536;else return iUShort;
};
this.getLongAt = function (iOffset, bBigEndian) {
var iByte1 = this.getByteAt(iOffset),
iByte2 = this.getByteAt(iOffset + 1),
iByte3 = this.getByteAt(iOffset + 2),
iByte4 = this.getByteAt(iOffset + 3);
var iLong = bBigEndian ? (((iByte1 << 8) + iByte2 << 8) + iByte3 << 8) + iByte4 : (((iByte4 << 8) + iByte3 << 8) + iByte2 << 8) + iByte1;
if (iLong < 0) iLong += 4294967296;
return iLong;
};
this.getSLongAt = function (iOffset, bBigEndian) {
var iULong = this.getLongAt(iOffset, bBigEndian);
if (iULong > 2147483647) return iULong - 4294967296;else return iULong;
};
this.getStringAt = function (iOffset, iLength) {
var aStr = [];
var aBytes = this.getBytesAt(iOffset, iLength);
for (var j = 0; j < iLength; j++) {
aStr[j] = String.fromCharCode(aBytes[j]);
}
return aStr.join('');
};
this.getCharAt = function (iOffset) {
return String.fromCharCode(this.getByteAt(iOffset));
};
this.toBase64 = function () {
return window.btoa(data);
};
this.fromBase64 = function (strBase64) {
data = window.atob(strBase64);
};
};
var BinaryAjax = function () {
function createRequest() {
var oHTTP = null;
if (window.ActiveXObject) {
oHTTP = new ActiveXObject('Microsoft.XMLHTTP');
} else if (window.XMLHttpRequest) {
oHTTP = new XMLHttpRequest();
}
return oHTTP;
}
function getHead(strURL, fncCallback, fncError) {
var oHTTP = createRequest();
if (oHTTP) {
if (fncCallback) {
if (typeof oHTTP.onload !== 'undefined') {
oHTTP.onload = function () {
if (oHTTP.status == '200') {
fncCallback(this);
} else {
if (fncError) fncError();
}
oHTTP = null;
};
} else {
oHTTP.onreadystatechange = function () {
if (oHTTP.readyState == 4) {
if (oHTTP.status == '200') {
fncCallback(this);
} else {
if (fncError) fncError();
}
oHTTP = null;
}
};
}
}
oHTTP.open('HEAD', strURL, true);
oHTTP.send(null);
} else {
if (fncError) fncError();
}
}
function sendRequest(strURL, fncCallback, fncError, aRange, bAcceptRanges, iFileSize) {
var oHTTP = createRequest();
if (oHTTP) {
var iDataOffset = 0;
if (aRange && !bAcceptRanges) {
iDataOffset = aRange[0];
}
var iDataLen = 0;
if (aRange) {
iDataLen = aRange[1] - aRange[0] + 1;
}
if (fncCallback) {
if (typeof oHTTP.onload !== 'undefined') {
oHTTP.onload = function () {
if (oHTTP.status == '200' || oHTTP.status == '206' || oHTTP.status == '0') {
oHTTP.binaryResponse = new BinaryFile(oHTTP.responseText, iDataOffset, iDataLen);
oHTTP.fileSize = iFileSize || oHTTP.getResponseHeader('Content-Length');
fncCallback(oHTTP);
} else {
if (fncError) fncError();
}
oHTTP = null;
};
} else {
oHTTP.onreadystatechange = function () {
if (oHTTP.readyState == 4) {
if (oHTTP.status == '200' || oHTTP.status == '206' || oHTTP.status == '0') {
var oRes = {
status: oHTTP.status,
binaryResponse: new BinaryFile(typeof oHTTP.responseBody === 'unknown' ? oHTTP.responseBody : oHTTP.responseText, iDataOffset, iDataLen),
fileSize: iFileSize || oHTTP.getResponseHeader('Content-Length')
};
fncCallback(oRes);
} else {
if (fncError) fncError();
}
oHTTP = null;
}
};
}
}
oHTTP.open('GET', strURL, true);
if (oHTTP.overrideMimeType) {
oHTTP.overrideMimeType('text/plain; charset=x-user-defined');
}
if (aRange && bAcceptRanges) {
oHTTP.setRequestHeader('Range', 'bytes=' + aRange[0] + '-' + aRange[1]);
}
oHTTP.setRequestHeader('If-Modified-Since', 'Sat, 1 Jan 1970 00:00:00 GMT');
oHTTP.send(null);
} else {
if (fncError) fncError();
}
}
return function (strURL, fncCallback, fncError, aRange) {
if (aRange) {
getHead(strURL, function (oHTTP) {
var iLength = parseInt(oHTTP.getResponseHeader('Content-Length'), 10);
var strAcceptRanges = oHTTP.getResponseHeader('Accept-Ranges');
var iStart, iEnd;
iStart = aRange[0];
if (aRange[0] < 0) iStart += iLength;
iEnd = iStart + aRange[1] - 1;
sendRequest(strURL, fncCallback, fncError, [iStart, iEnd], strAcceptRanges == 'bytes', iLength);
});
} else {
sendRequest(strURL, fncCallback, fncError);
}
};
}();
function canvasResize(file, options) {
var pluginName = 'canvasResize';
var methods = {
newsize: function newsize(w, h, W, H, C) {
var c = C ? 'h' : '';
if (W && w > W || H && h > H) {
var r = w / h;
if ((r >= 1 || H === 0) && W && !C) {
w = W;
h = W / r >> 0;
} else if (C && r <= W / H) {
w = W;
h = W / r >> 0;
c = 'w';
} else {
w = H * r >> 0;
h = H;
}
}
return {
width: w,
height: h,
cropped: c
};
},
dataURLtoBlob: function dataURLtoBlob(data) {
var mimeString = data.split(',')[0].split(':')[1].split(';')[0];
var byteString = atob(data.split(',')[1]);
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
var bb = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder;
if (bb) {
bb = new (window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder)();
bb.append(ab);
return bb.getBlob(mimeString);
} else {
bb = new Blob([ab], {
type: mimeString
});
return bb;
}
},
detectSubsampling: function detectSubsampling(img) {
var iw = img.width,
ih = img.height;
if (iw * ih > 1048576) {
var canvas = document.createElement('canvas');
canvas.width = canvas.height = 1;
var ctx = canvas.getContext('2d');
ctx.drawImage(img, -iw + 1, 0);
return ctx.getImageData(0, 0, 1, 1).data[3] === 0;
} else {
return false;
}
},
rotate: function rotate(orientation, angle) {
var o = {
1: { 90: 6, 180: 3, 270: 8 },
2: { 90: 7, 180: 4, 270: 5 },
3: { 90: 8, 180: 1, 270: 6 },
4: { 90: 5, 180: 2, 270: 7 },
5: { 90: 2, 180: 7, 270: 4 },
6: { 90: 3, 180: 8, 270: 1 },
7: { 90: 4, 180: 5, 270: 2 },
8: { 90: 1, 180: 6, 270: 3 }
};
return o[orientation][angle] ? o[orientation][angle] : orientation;
},
transformCoordinate: function transformCoordinate(canvas, width, height, orientation) {
switch (orientation) {
case 5:
case 6:
case 7:
case 8:
canvas.width = height;
canvas.height = width;
break;
default:
canvas.width = width;
canvas.height = height;
}
var ctx = canvas.getContext('2d');
switch (orientation) {
case 1:
break;
case 2:
ctx.translate(width, 0);
ctx.scale(-1, 1);
break;
case 3:
ctx.translate(width, height);
ctx.rotate(Math.PI);
break;
case 4:
ctx.translate(0, height);
ctx.scale(1, -1);
break;
case 5:
ctx.rotate(0.5 * Math.PI);
ctx.scale(1, -1);
break;
case 6:
ctx.rotate(0.5 * Math.PI);
ctx.translate(0, -height);
break;
case 7:
ctx.rotate(0.5 * Math.PI);
ctx.translate(width, -height);
ctx.scale(-1, 1);
break;
case 8:
ctx.rotate(-0.5 * Math.PI);
ctx.translate(-width, 0);
break;
default:
break;
}
},
detectVerticalSquash: function detectVerticalSquash(img, iw, ih) {
var canvas = document.createElement('canvas');
canvas.width = 1;
canvas.height = ih;
var ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
var data = ctx.getImageData(0, 0, 1, ih).data;
var sy = 0;
var ey = ih;
var py = ih;
while (py > sy) {
var alpha = data[(py - 1) * 4 + 3];
if (alpha === 0) {
ey = py;
} else {
sy = py;
}
py = ey + sy >> 1;
}
var ratio = py / ih;
return ratio === 0 ? 1 : ratio;
},
callback: function callback(d) {
return d;
},
extend: function extend() {
var target = arguments[0] || {},
a = 1,
al = arguments.length,
deep = false;
if (target.constructor === Boolean) {
deep = target;
target = arguments[1] || {};
}
if (al === 1) {
target = this;
a = 0;
}
var prop;
for (; a < al; a++) {
if ((prop = arguments[a]) !== null) {
for (var i in prop) {
if (target === prop[i]) continue;
if (deep && _typeof(prop[i]) === 'object' && target[i]) {
methods.extend(target[i], prop[i]);
} else if (prop[i] !== undefined) target[i] = prop[i];
}
}
}
return target;
}
};
var defaults = {
width: 300,
height: 0,
crop: false,
quality: 80,
rotate: 0,
callback: methods.callback
};
Plugin.prototype = {
init: function init() {
var $this = this;
var file = this.file;
var reader = new FileReader();
reader.onloadend = function (e) {
var dataURL = e.target.result;
var byteString = atob(dataURL.split(',')[1]);
var binary = new BinaryFile(byteString, 0, byteString.length);
var exif = EXIF.readFromBinaryFile(binary);
var img = new Image();
img.onload = function (e) {
var orientation = exif['Orientation'] || 1;
orientation = methods.rotate(orientation, $this.options.rotate);
var size = orientation >= 5 && orientation <= 8 ? methods.newsize(img.height, img.width, $this.options.width, $this.options.height, $this.options.crop) : methods.newsize(img.width, img.height, $this.options.width, $this.options.height, $this.options.crop);
var iw = img.width,
ih = img.height;
var width = size.width,
height = size.height;
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
ctx.save();
methods.transformCoordinate(canvas, width, height, orientation);
if (methods.detectSubsampling(img)) {
iw /= 2;
ih /= 2;
}
var d = 1024;
var tmpCanvas = document.createElement('canvas');
tmpCanvas.width = tmpCanvas.height = d;
var tmpCtx = tmpCanvas.getContext('2d');
var vertSquashRatio = methods.detectVerticalSquash(img, iw, ih);
var sy = 0;
while (sy < ih) {
var sh = sy + d > ih ? ih - sy : d;
var sx = 0;
while (sx < iw) {
var sw = sx + d > iw ? iw - sx : d;
tmpCtx.clearRect(0, 0, d, d);
tmpCtx.drawImage(img, -sx, -sy);
var dx = Math.floor(sx * width / iw);
var dw = Math.ceil(sw * width / iw);
var dy = Math.floor(sy * height / ih / vertSquashRatio);
var dh = Math.ceil(sh * height / ih / vertSquashRatio);
ctx.drawImage(tmpCanvas, 0, 0, sw, sh, dx, dy, dw, dh);
sx += d;
}
sy += d;
}
ctx.restore();
tmpCanvas = tmpCtx = null;
var newcanvas = document.createElement('canvas');
newcanvas.width = size.cropped === 'h' ? height : width;
newcanvas.height = size.cropped === 'w' ? width : height;
var x = size.cropped === 'h' ? (height - width) * 0.5 : 0;
var y = size.cropped === 'w' ? (width - height) * 0.5 : 0;
var newctx = newcanvas.getContext('2d');
newctx.drawImage(canvas, x, y, width, height);
if (file.type === 'image/png') {
var data = newcanvas.toDataURL(file.type);
} else {
var data = newcanvas.toDataURL('image/jpeg', $this.options.quality * 0.01);
}
$this.options.callback(data, newcanvas.width, newcanvas.height);
};
img.src = dataURL;
};
reader.readAsDataURL(file);
}
};
function Plugin(file, options) {
this.file = file;
this.options = methods.extend({}, defaults, options);
this._defaults = defaults;
this._name = pluginName;
this.init();
}
if (typeof file === 'string') {
return methods[file](options);
} else {
new Plugin(file, options);
}
}