上传图片时，往往需要对图片进行裁剪。
实现方法为：
1.引入crop.css
body{background:#000}.upload-container{position:absolute;left:50%;top:50%;margin-left:-57px;margin-top:-57px}.upload-pretty{position:relative;left:0;top:0;display:block;overflow:hidden}.upload-pretty input{position:absolute;top:0;right:0;font-size:100px;opacity:0;cursor:pointer}.nav-bar{position:fixed;z-index:10;right:0;left:0;height:44px;padding-right:10px;padding-left:10px;border-bottom:0;background-color:#f7f7f7;-webkit-box-shadow:0 0 1px rgba(0,0,0,.85);box-shadow:0 0 1px rgba(0,0,0,.85);-webkit-backface-visibility:hidden;backface-visibility:hidden}.nav-bar-tab{bottom:0;display:table;width:100%;height:50px;padding:0;table-layout:fixed;border-top:0;border-bottom:0;-webkit-touch-callout:none}.tab-item{display:table-cell;overflow:hidden;width:1%;height:50px;text-align:center;vertical-align:middle;white-space:nowrap;text-overflow:ellipsis;color:#000}.nav-bar-tab .tab-item:active{background:#D3D3D3}.nav-bar-tab .tab-icon{font-size:28px;position:relative;z-index:20;top:3px;width:24px;height:24px;padding-top:0;padding-bottom:0}.nav-bar-tab .tab-item .mui-icon~.tab-label{font-size:11px;display:block;overflow:hidden;text-overflow:ellipsis}.nav-bar-tab .tab-item .mui-icon.rotate90{-webkit-transform:scaleX(-1);transform:scaleX(-1)}.button-three-dimen{display:block;zoom:1;vertical-align:baseline;margin:0 2px;outline:0;cursor:pointer;text-align:center;text-decoration:none;font:14px/100% Arial,Helvetica,sans-serif;padding:.5em 2em .55em;text-shadow:0 1px 1px rgba(0,0,0,.3);-webkit-border-radius:.5em;-moz-border-radius:.5em;border-radius:.5em;-webkit-box-shadow:0 1px 2px rgba(0,0,0,.2);-moz-box-shadow:0 1px 2px rgba(0,0,0,.2);box-shadow:0 1px 2px rgba(0,0,0,.2);color:#606060;border:1px solid #b7b7b7;background:#fff;background:-webkit-gradient(linear,left top,left bottom,from(#fff),to(#ededed));background:-moz-linear-gradient(top,#fff,#ededed)}.button-three-dimen:hover{text-decoration:none;background:#ededed;background:-webkit-gradient(linear,left top,left bottom,from(#fff),to(#dcdcdc));background:-moz-linear-gradient(top,#fff,#dcdcdc)}.button-three-dimen:active{position:relative;top:1px;color:#999;background:-webkit-gradient(linear,left top,left bottom,from(#ededed),to(#fff));background:-moz-linear-gradient(top,#ededed,#fff)}.img-clip{margin-top:5rem !important;}.img-wrap,.show-content{margin:0 auto}.show-content{position:relative;text-align:center;vertical-align:middle}.choose-gallery{margin-top:-10px}.choose-camera{margin-top:50px}.clip-content{width:100%;z-index:3;position:absolute;top:0;bottom:0;left:0;right:0;background:#000;display:none}@font-face{font-family:Muiicons;font-weight:400;font-style:normal;src:url(../fonts/mui.ttf) format('truetype')}.mui-icon{font-family:Muiicons;font-size:24px;font-weight:400;font-style:normal;line-height:1;display:inline-block;text-decoration:none;-webkit-font-smoothing:antialiased}.mui-icon-checkmarkempty:before{content:'\e472'}.mui-icon-refreshempty:before{content:'\e461'}.mui-icon-arrowleft:before{content:'\e582'}.hidden{display:none!important}.img-clip{position:relative;width:95%;margin:0 auto;padding:0}.img-clip canvas{width:100% !important;height:auto !important;display:block}.img-clip .magnifier{display:none !important;position:absolute;top:-90px;right:0;width:80px;height:80px;border-radius:50%;border:2px solid #fff}.img-clip .clip-hidden{display:none}.img-clip .clip-rect{position:absolute;border:1px dashed #de3c50;top:10px;left:10px;width:100px;height:100px;cursor:move}.img-clip .clip-rect .clip-tips{position:absolute;top:-40px;left:0;padding:5px;font-size:13px;background-color:#333;border-radius:5px;color:#fff}.img-clip .clip-rect-horn{position:absolute;display:block;background-color:rgba(222,60,80,.7);border-radius:50%;width:20px;height:20px}.img-clip .horn-n{top:-10px;left:50%;margin-left:-10px;cursor:n-resize}.img-clip .horn-s{bottom:-10px;left:50%;margin-left:-10px;cursor:s-resize}.img-clip .horn-w{top:50%;left:-10px;margin-top:-10px;cursor:w-resize}.img-clip .horn-e{top:50%;right:-10px;margin-top:-10px;cursor:e-resize}.img-clip .horn-nw{top:-10px;left:-10px;cursor:nw-resize}.img-clip .horn-ne{top:-10px;right:-10px;cursor:ne-resize}.img-clip .horn-sw{bottom:-10px;left:-10px;cursor:sw-resize}.img-clip .horn-se{bottom:-10px;right:-10px;cursor:se-resize}
2.引入crop.js
(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" }; // EXIF 2.3 Spec var IFD1Tags = EXIF.IFD1Tags = { 0x0100: "ImageWidth", 0x0101: "ImageHeight", 0x0102: "BitsPerSample", 0x0103: "Compression", 0x0106: "PhotometricInterpretation", 0x0111: "StripOffsets", 0x0112: "Orientation", 0x0115: "SamplesPerPixel", 0x0116: "RowsPerStrip", 0x0117: "StripByteCounts", 0x011A: "XResolution", 0x011B: "YResolution", 0x011C: "PlanarConfiguration", 0x0128: "ResolutionUnit", 0x0201: "JpegIFOffset", // When image format is JPEG, this value show offset to JPEG data stored.(aka "ThumbnailOffset" or "JPEGInterchangeFormat") 0x0202: "JpegIFByteCount", // When image format is JPEG, this value shows data size of JPEG image (aka "ThumbnailLength" or "JPEGInterchangeFormatLength") 0x0211: "YCbCrCoefficients", 0x0212: "YCbCrSubSampling", 0x0213: "YCbCrPositioning", 0x0214: "ReferenceBlackWhite" }; 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); img.exifdata = data || {}; var iptcdata = findIPTCinJPEG(binFile); img.iptcdata = iptcdata || {}; if (EXIF.isXmpEnabled) { var xmpdata= findXMPinJPEG(binFile); img.xmpdata = xmpdata || {}; } 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 (self.FileReader && (img instanceof self.Blob || img instanceof self.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; } } } /** * Given an IFD (Image File Directory) start offset * returns an offset to next IFD or 0 if it's the last IFD. */ function getNextIFDOffset(dataView, dirStart, bigEnd){ //the first 2bytes means the number of directory entries contains in this IFD var entries = dataView.getUint16(dirStart, !bigEnd); // After last directory entry, there is a 4bytes of data, // it means an offset to next IFD. // If its value is '0x00000000', it means this is the last IFD and there is no linked IFD. return dataView.getUint32(dirStart + 2 + entries * 12, !bigEnd); // each entry is 12 bytes long } function readThumbnailImage(dataView, tiffStart, firstIFDOffset, bigEnd){ // get the IFD1 offset var IFD1OffsetPointer = getNextIFDOffset(dataView, tiffStart+firstIFDOffset, bigEnd); if (!IFD1OffsetPointer) { // console.log('******** IFD1Offset is empty, image thumb not found ********'); return {}; } else if (IFD1OffsetPointer > dataView.byteLength) { // this should not happen // console.log('******** IFD1Offset is outside the bounds of the DataView ********'); return {}; } // console.log('******* thumbnail IFD offset (IFD1) is: %s', IFD1OffsetPointer); var thumbTags = readTags(dataView, tiffStart, tiffStart + IFD1OffsetPointer, IFD1Tags, bigEnd) // EXIF 2.3 specification for JPEG format thumbnail // If the value of Compression(0x0103) Tag in IFD1 is '6', thumbnail image format is JPEG. // Most of Exif image uses JPEG format for thumbnail. In that case, you can get offset of thumbnail // by JpegIFOffset(0x0201) Tag in IFD1, size of thumbnail by JpegIFByteCount(0x0202) Tag. // Data format is ordinary JPEG format, starts from 0xFFD8 and ends by 0xFFD9. It seems that // JPEG format and 160x120pixels of size are recommended thumbnail format for Exif2.1 or later. if (thumbTags['Compression']) { // console.log('Thumbnail image found!'); switch (thumbTags['Compression']) { case 6: // console.log('Thumbnail image format is JPEG'); if (thumbTags.JpegIFOffset && thumbTags.JpegIFByteCount) { // extract the thumbnail var tOffset = tiffStart + thumbTags.JpegIFOffset; var tLength = thumbTags.JpegIFByteCount; thumbTags['blob'] = new Blob([new Uint8Array(dataView.buffer, tOffset, tLength)], { type: 'image/jpeg' }); } break; case 1: console.log("Thumbnail image format is TIFF, which is not implemented."); break; default: console.log("Unknown thumbnail image format '%s'", thumbTags['Compression']); } } else if (thumbTags['PhotometricInterpretation'] == 2) { console.log("Thumbnail image format is RGB, which is not implemented."); } return thumbTags; } 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]; } } // extract thumbnail tags['thumbnail'] = readThumbnailImage(file, tiffOffset, firstIFDOffset, bigEnd); return tags; } function findXMPinJPEG(file) { if (!('DOMParser' in self)) { // console.warn('XML parsing not supported without DOMParser'); return; } 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, dom = new DOMParser(); while (offset < (length-4)) { if (getStringFromDB(dataView, offset, 4) == "http") { var startOffset = offset - 1; var sectionLength = dataView.getUint16(offset - 2) - 1; var xmpString = getStringFromDB(dataView, startOffset, sectionLength) var xmpEndIndex = xmpString.indexOf('xmpmeta>') + 8; xmpString = xmpString.substring( xmpString.indexOf( '<x:xmpmeta' ), xmpEndIndex ); var indexOfXmp = xmpString.indexOf('x:xmpmeta') + 10 //Many custom written programs embed xmp/xml without any namespace. Following are some of them. //Without these namespaces, XML is thought to be invalid by parsers xmpString = xmpString.slice(0, indexOfXmp) + 'xmlns:Iptc4xmpCore="http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/" ' + 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ' + 'xmlns:tiff="http://ns.adobe.com/tiff/1.0/" ' + 'xmlns:plus="http://schemas.android.com/apk/lib/com.google.android.gms.plus" ' + 'xmlns:ext="http://www.gettyimages.com/xsltExtension/1.0" ' + 'xmlns:exif="http://ns.adobe.com/exif/1.0/" ' + 'xmlns:stEvt="http://ns.adobe.com/xap/1.0/sType/ResourceEvent#" ' + 'xmlns:stRef="http://ns.adobe.com/xap/1.0/sType/ResourceRef#" ' + 'xmlns:crs="http://ns.adobe.com/camera-raw-settings/1.0/" ' + 'xmlns:xapGImg="http://ns.adobe.com/xap/1.0/g/img/" ' + 'xmlns:Iptc4xmpExt="http://iptc.org/std/Iptc4xmpExt/2008-02-29/" ' + xmpString.slice(indexOfXmp) var domDocument = dom.parseFromString( xmpString, 'text/xml' ); return xml2Object(domDocument); } else{ offset++; } } } function xml2json(xml) { var json = {}; if (xml.nodeType == 1) { // element node if (xml.attributes.length > 0) { json['@attributes'] = {}; for (var j = 0; j < xml.attributes.length; j++) { var attribute = xml.attributes.item(j); json['@attributes'][attribute.nodeName] = attribute.nodeValue; } } } else if (xml.nodeType == 3) { // text node return xml.nodeValue; } // deal with children if (xml.hasChildNodes()) { for(var i = 0; i < xml.childNodes.length; i++) { var child = xml.childNodes.item(i); var nodeName = child.nodeName; if (json[nodeName] == null) { json[nodeName] = xml2json(child); } else { if (json[nodeName].push == null) { var old = json[nodeName]; json[nodeName] = []; json[nodeName].push(old); } json[nodeName].push(xml2json(child)); } } } return json; } function xml2Object(xml) { try { var obj = {}; if (xml.children.length > 0) { for (var i = 0; i < xml.children.length; i++) { var item = xml.children.item(i); var attributes = item.attributes; for(var idx in attributes) { var itemAtt = attributes[idx]; var dataKey = itemAtt.nodeName; var dataValue = itemAtt.nodeValue; if(dataKey !== undefined) { obj[dataKey] = dataValue; } } var nodeName = item.nodeName; if (typeof (obj[nodeName]) == "undefined") { obj[nodeName] = xml2json(item); } else { if (typeof (obj[nodeName].push) == "undefined") { var old = obj[nodeName]; obj[nodeName] = []; obj[nodeName].push(old); } obj[nodeName].push(xml2json(item)); } } } else { obj = xml.textContent; } return obj; } catch (e) { console.log(e.message); } } EXIF.enableXmp = function() { EXIF.isXmpEnabled = true; } EXIF.disableXmp = function() { EXIF.isXmpEnabled = false; } EXIF.getData = function(img, callback) { if (((self.Image && img instanceof self.Image) || (self.HTMLImageElement && img instanceof self.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.getIptcTag = function(img, tag) { if (!imageHasData(img)) return; return img.iptcdata[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.getAllIptcTags = function(img) { if (!imageHasData(img)) return {}; var a, data = img.iptcdata, 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)); /** * input输入框快速选择image */ (function() { 'use strict'; /** * 全局生效默认设置 * 默认设置可以最大程度的减小调用时的代码 */ var defaultSetting = { // 可选参数 File Image Camera Image_Camera Image_File Camera_File Text All type: 'ALL', isMulti: false, container: '' }; function extend(target) { var finalTarget = target; for (var _len = arguments.length, rest = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) { rest[_key - 1] = arguments[_key]; } rest.forEach(function(source) { source && Object.keys(source).forEach(function(key) { finalTarget[key] = source[key]; }); }); return finalTarget; } function selector(element) { var target = element; if (typeof target === 'string') { target = document.querySelector(target); } return target; } /** * 从一个file对象,加载对应的数据 * FileReader的方法 * 方法名 参数 描述 * readAsBinaryString file 将文件读取为二进制编码 * readAsText file,[encoding] 将文件读取为文本 * readAsDataURL file 将文件读取为DataURL * abort (none) 终端读取操作 * @param {FileReader} oFReader 对应的加载器 * @param {File} file 文件对象,选择的是img类型 * @param {Function} success 成功加载完毕后的回调,回调result(不同的加载方式result类型不同) * @param {Function} error 失败回调 * @return {FileReader} 返回文件加载器对象 * @param {String} type 类型,DataUrl还是Text还是Binary */ function loadDataFromFile(oFReader, file, success, error, type) { if (window.FileReader || !oFReader || !(oFReader instanceof FileReader)) { oFReader.onload = function(oFREvent) { // 解决DataUrl模式下的b64字符串不正确问题 var b64 = oFREvent.target.result; if (type === 'DataUrl') { // 正常的图片应该是data:image/gif;data:image/png;;data:image/jpeg;data:image/x-icon; // 而在Android的一些5.0系统以下(如4.0)的设备中,有些返回的b64字符串缺少关键image/gif标识,所以需要手动加上 if (b64 && b64.indexOf('data:base64,') !== -1) { // 去除旧有的错误头部 b64 = b64.replace('data:base64,', ''); var dataType = ''; // 文件名字 var name = file.name; if (name && name.toLowerCase().indexOf('.jpg') !== -1) { // jpeg dataType = 'image/jpeg'; } else if (name && name.toLowerCase().indexOf('.png') !== -1) { // png dataType = 'image/png'; } else if (name && name.toLowerCase().indexOf('.gif') !== -1) { // gif dataType = 'image/gif'; } else if (name && name.toLowerCase().indexOf('.icon') !== -1) { // x-icon dataType = 'image/x-icon'; } b64 = 'data:' + dataType + ';base64,' + b64; } } success && success(b64); }; oFReader.onerror = function(error) { error && error(error); }; if (type === 'DataUrl') { oFReader.readAsDataURL(file); } else if (type === 'Text') { oFReader.readAsText(file); } else { oFReader.readAsBinaryString(file); } return oFReader; } else { error && error('错误:FileReader不存在!'); } } /** * 构造一个 FileInpput 对象 * @param {Object} options 配置参数 * @constructor */ function FileInput(options) { options = extend({}, defaultSetting, options); this.container = selector(options.container); this.options = options; this._init(); this._addEvent(); } FileInput.prototype = { /** * 初始化 type isMulti filter等 */ _init: function() { var options = this.options, container = this.container, isEjs = /EpointEJS/.test(navigator.userAgent);; // 设置单个文件选择需要的 属性 container.setAttribute('type', 'file'); if (options.isMulti) { container.setAttribute('multiple', 'multiple'); } else { container.removeAttribute('multiple'); } var accept = options.accept || container.getAttribute('accept'); var type = options.type || 'File'; var filter; if (type === 'Image') { filter = 'image/*'; type = 'DataUrl'; } else if (type === 'Camera') { if (isEjs) { filter = 'camera/*'; } else { filter = 'image/*'; } type = 'DataUrl'; } else if (type === 'Image_Camera') { if (isEjs) { filter = 'image_camera/*'; } else { filter = 'image/*'; } type = 'DataUrl'; } else if (type === 'Image_File') { if (isEjs) { filter = 'image_file/*'; } else { filter = '*'; } type = 'DataUrl'; } else if (type === 'Camera_File') { if (isEjs) { filter = 'camera_file/*'; } else { filter = '*'; } type = 'DataUrl'; } else if (type === 'Text') { filter = 'file/*'; type = 'Text'; } else if (type === 'File') { if (isEjs) { filter = 'file/*'; type = 'File'; } else { filter = '*'; type = 'File'; } } else if (type === 'All') { if (isEjs) { filter = '*/*'; type = 'DataUrl'; } else { filter = '*'; type = 'DataUrl'; } } else { filter = '*'; type = 'File'; } this.dataType = type; filter = accept || filter; container.setAttribute('accept', filter); }, /** * 增加事件，包括 * 轮播图片的监听 * 图片滑动的监听，等等 */ _addEvent: function() { var container = this.container, options = this.options, success = options.success, error = options.error, self = this; // 选择的回调中进行预处理 var changeHandle = function() { var aFiles = container.files; var len = aFiles.length; if (len === 0) { return; } // 定义文件读取器和后缀类型过滤器 var oFReader = new window.FileReader(); var index = 0; var chainCall = function() { if (index >= len) { return; } loadDataFromFile(oFReader, aFiles[index], function(b64Src) { success && success(b64Src, aFiles[index], { index: index, len: len, isEnd: (index >= len - 1) }); index++; chainCall(); }, error, self.dataType); }; chainCall(); }; container.addEventListener('change', changeHandle); // 注册一个委托对象，方便取消 this.delegatesHandle = changeHandle; }, /** * 将需要暴露的destroy绑定到了 原型链上 */ destroy: function() { this.container.removeEventListener('change', this.delegatesHandle); this.container = null; this.options = null; } }; window.FileInput = FileInput; })(); /*! * image-process v0.0.1 * (c) 2017-2017 dailc * Released under the MIT License. * https://github.com/dailc/image-process */ (function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define === 'function' && define.amd ? define(factory) : (global.ImageClip = factory()); }(this, (function () { 'use strict'; function extend(target) { var finalTarget = target; for (var _len = arguments.length, rest = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) { rest[_key - 1] = arguments[_key]; } rest.forEach(function (source) { source && Object.keys(source).forEach(function (key) { finalTarget[key] = source[key]; }); }); return finalTarget; } /** * 选择这段代码用到的太多了，因此抽取封装出来 * @param {Object} element dom元素或者selector * @return {HTMLElement} 返回选择的Dom对象，无果没有符合要求的，则返回null */ function selector(element) { var target = element; if (typeof target === 'string') { target = document.querySelector(target); } return target; } /** * 获取DOM的可视区高度，兼容PC上的body高度获取 * 因为在通过body获取时，在PC上会有CSS1Compat形式，所以需要兼容 * @param {HTMLElement} dom 需要获取可视区高度的dom,对body对象有特殊的兼容方案 * @return {Number} 返回最终的高度 */ /** * 设置一个Util对象下的命名空间 * @param {Object} parent 需要绑定到哪一个对象上 * @param {String} namespace 需要绑定的命名空间名 * @param {Object} target 需要绑定的目标对象 * @return {Object} 返回最终的对象 */ /** * 加入系统判断功能 */ function osMixin(hybrid) { var hybridJs = hybrid; var detect = function detect(ua) { this.os = {}; var android = ua.match(/(Android);?[\s/]+([\d.]+)?/); if (android) { this.os.android = true; this.os.version = android[2]; this.os.isBadAndroid = !/Chrome\/\d/.test(window.navigator.appVersion); } var iphone = ua.match(/(iPhone\sOS)\s([\d_]+)/); if (iphone) { this.os.ios = true; this.os.iphone = true; this.os.version = iphone[2].replace(/_/g, '.'); } var ipad = ua.match(/(iPad).*OS\s([\d_]+)/); if (ipad) { this.os.ios = true; this.os.ipad = true; this.os.version = ipad[2].replace(/_/g, '.'); } // quickhybrid的容器 var quick = ua.match(/QuickHybrid/i); if (quick) { this.os.quick = true; } // epoint的容器 var ejs = ua.match(/EpointEJS/i); if (ejs) { this.os.ejs = true; } var dd = ua.match(/DingTalk/i); if (dd) { this.os.dd = true; } // 如果ejs和钉钉以及quick都不是，则默认为h5 if (!ejs && !dd && !quick) { this.os.h5 = true; } }; detect.call(hybridJs, navigator.userAgent); } var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } /** * ios手机竖拍时会旋转，需要外部引入exif去主动旋转 */ var defaultetting = { container: '#imgclip', // 必须是一个image对象 img: null, // 是否开启平滑 isSmooth: true, // 放大镜捕获的图像半径 captureRadius: 30, // 移动矩形框时的最小间距 minMoveDiff: 1, // 压缩质量 quality: 0.92, mime: 'image/jpeg', // 限制canvas显示的最大高度（不是实际高度，是css显示的最大高度） // 单位是像素，不传的话不限制 maxCssHeight: 0, // 大小提示框的风格，0-点击时显示，1-恒显示，-1-永不显示 sizeTipsStyle: 0, // 压缩时的放大系数，默认为1，如果增大，代表图像的尺寸会变大(最大不会超过原图) compressScaleRatio: 1, // ios的iPhone下主动放大一定系数以解决分辨率过小的模糊问题 iphoneFixedRatio: 2, // 是否采用原图像素（不会压缩） isUseOriginSize: false, // 增加最大宽度，增加后最大不会超过这个宽度 maxWidth: 0, // 使用强制的宽度，如果使用，其它宽高比系数都会失效，默认整图使用这个宽度 forceWidth: 0, // 同上，但是一般不建议设置，因为很可能会改变宽高比导致拉升，特殊场景下使用 forceHeight: 0 }; var ImgClip$1 = function () { /** * 构造函数 * @param {Object} options 配置信息 * @constructor */ function ImgClip(options) { _classCallCheck(this, ImgClip); osMixin(this); this.options = extend({}, defaultetting, options); this.container = selector(this.options.container); this.img = this.options.img; this.domChildren = []; this.events = {}; this.initCanvas(); this.initClip(); this.initMagnifier(); this.initTransferCanvas(); this.resetClipRect(); } /** * 获取devicePixelRatio(像素比) * canvas绘制时乘以缩放系数，防止裁剪不清晰 * （譬如320的手机上可能裁剪出来的就是640-系数是2） */ _createClass(ImgClip, [{ key: 'getPixelRatio', value: function getPixelRatio(context) { // 注意，backingStorePixelRatio属性已弃用 var backingStore = context.backingStorePixelRatio || context.webkitBackingStorePixelRatio || context.mozBackingStorePixelRatio || context.msBackingStorePixelRatio || context.oBackingStorePixelRatio || context.backingStorePixelRatio || 1; var ratio = (window.devicePixelRatio || 1) / backingStore; ratio *= this.options.compressScaleRatio || 1; if (this.os.ios && this.os.iphone) { ratio *= this.options.iphoneFixedRatio || 1; } return ratio; } }, { key: 'clear', value: function clear() { var lenD = this.domChildren && this.domChildren.length || 0; for (var i = 0; i < lenD; i += 1) { this.container.removeChild(this.domChildren[i]); } this.domChildren = null; var allEventNames = Object.keys(this.events || {}); var lenE = allEventNames && allEventNames.length || 0; for (var _i = 0; _i < lenE; _i += 1) { this.container.removeEventListener(allEventNames[_i], this.events[allEventNames[_i]]); } this.events = null; } }, { key: 'initCanvas', value: function initCanvas() { this.canvasFull = document.createElement('canvas'); this.ctxFull = this.canvasFull.getContext('2d'); this.canvasFull.className = 'clip-canvas-full'; this.smoothCtx(this.ctxFull); // 实际的像素比，绘制时基于这个比例绘制 this.RATIO_PIXEL = this.getPixelRatio(this.ctxFull); // 获取图片的宽高比 var wPerH = this.img.width / this.img.height; var oldWidth = this.container.offsetWidth || window.innerWidth; this.oldWidth = oldWidth; this.oldHeight = oldWidth / wPerH; this.resizeCanvas(oldWidth, this.oldHeight); this.container.appendChild(this.canvasFull); this.domChildren.push(this.canvasFull); } }, { key: 'resizeCanvas', value: function resizeCanvas(width, height) { var maxCssHeight = this.options.maxCssHeight; var wPerH = width / height; var legalWidth = this.oldWidth; var legalHeight = legalWidth / wPerH; if (maxCssHeight && legalHeight > maxCssHeight) { legalHeight = maxCssHeight; legalWidth = legalHeight * wPerH; } this.marginLeft = (this.oldWidth - legalWidth) / 2; this.canvasFull.style.width = legalWidth + 'px'; this.canvasFull.style.height = legalHeight + 'px'; this.canvasFull.style.marginLeft = this.marginLeft + 'px'; this.canvasFull.width = legalWidth * this.RATIO_PIXEL; this.canvasFull.height = legalHeight * this.RATIO_PIXEL; if (this.rotateStep & 1) { this.scale = this.canvasFull.width / this.img.height; } else { this.scale = this.canvasFull.width / this.img.width; } } }, { key: 'initClip', value: function initClip() { var clipRect = document.createElement('div'); clipRect.className = 'clip-rect'; this.clipRect = clipRect; this.container.appendChild(this.clipRect); this.domChildren.push(this.clipRect); // 添加tips var clipTips = document.createElement('span'); clipTips.className = 'clip-tips'; this.clipRect.appendChild(clipTips); this.clipTips = clipTips; if (this.options.sizeTipsStyle === -1 || this.options.sizeTipsStyle === 0) { // clipTips,canvas之外的 this.clipTips.classList.add('clip-hidden'); } this.clipRectHorns = []; // 添加8个角 for (var i = 0; i < 8; i += 1) { var spanHorn = document.createElement('span'); spanHorn.className = 'clip-rect-horn '; if (i === 0) { spanHorn.className += 'horn-nw'; } else if (i === 1) { spanHorn.className += 'horn-ne'; } else if (i === 2) { spanHorn.className += 'horn-sw'; } else if (i === 3) { spanHorn.className += 'horn-se'; } else if (i === 4) { spanHorn.className += 'horn-n'; } else if (i === 5) { spanHorn.className += 'horn-s'; } else if (i === 6) { spanHorn.className += 'horn-w'; } else if (i === 7) { spanHorn.className += 'horn-e'; } this.clipRect.appendChild(spanHorn); this.clipRectHorns.push(spanHorn); } this.resizeClip(); } }, { key: 'resizeClip', value: function resizeClip() { this.listenerHornsResize(); this.listenerRectMove(); this.listenerContainerLeave(); } }, { key: 'listenerHornsResize', value: function listenerHornsResize() { var _this = this; this.clipEventState = {}; var saveEventState = function saveEventState(e) { _this.clipEventState.width = _this.clipRect.offsetWidth; _this.clipEventState.height = _this.clipRect.offsetHeight; _this.clipEventState.left = _this.clipRect.offsetLeft - _this.marginLeft; _this.clipEventState.top = _this.clipRect.offsetTop; _this.clipEventState.mouseX = e.touches ? e.touches[0].pageX : e.pageX; _this.clipEventState.mouseY = e.touches ? e.touches[0].pageY : e.pageY; _this.clipEventState.evnt = e; }; var getCurXY = function getCurXY(mouseX, mouseY) { // 父容器的top和left也要减去 var curY = mouseY - _this.canvasFull.offsetTop - _this.container.offsetTop; var curX = mouseX - _this.canvasFull.offsetLeft - _this.container.offsetLeft; curY = Math.min(curY, _this.canvasFull.offsetHeight); curY = Math.max(0, curY); curX = Math.min(curX, _this.canvasFull.offsetWidth); curX = Math.max(0, curX); _this.curX = curX; _this.curY = curY; return { curX: curX, curY: curY }; }; this.getCurXY = getCurXY; var moving = function moving(e) { if (!_this.canResizing) { return; } e.preventDefault(); e.stopPropagation(); var clipEventState = _this.clipEventState; var target = clipEventState.evnt.target; // 区分pageX与clientX var mouseY = e.touches ? e.touches[0].pageY : e.pageY; var mouseX = e.touches ? e.touches[0].pageX : e.pageX; var curCooidinate = getCurXY(mouseX, mouseY); var curX = curCooidinate.curX; var curY = curCooidinate.curY; var width = void 0; var height = void 0; var left = void 0; var top = void 0; if (target.classList.contains('horn-nw')) { width = clipEventState.width - (curX - clipEventState.left); height = clipEventState.height - (curY - clipEventState.top); left = curX; top = curY; } else if (target.classList.contains('horn-ne')) { width = curX - clipEventState.left; height = clipEventState.height - (curY - clipEventState.top); left = clipEventState.left; top = curY; } else if (target.classList.contains('horn-sw')) { width = clipEventState.width - (curX - clipEventState.left); height = curY - clipEventState.top; left = curX; top = clipEventState.top; } else if (target.classList.contains('horn-se')) { width = curX - clipEventState.left; height = curY - clipEventState.top; left = clipEventState.left; top = clipEventState.top; } else if (target.classList.contains('horn-n')) { width = clipEventState.width; height = clipEventState.height - (curY - clipEventState.top); left = clipEventState.left; top = curY; } else if (target.classList.contains('horn-s')) { width = clipEventState.width; height = curY - clipEventState.top; left = clipEventState.left; top = clipEventState.top; } else if (target.classList.contains('horn-w')) { width = clipEventState.width - (curX - clipEventState.left); height = clipEventState.height; left = curX; top = clipEventState.top; } else if (target.classList.contains('horn-e')) { width = curX - clipEventState.left; height = clipEventState.height; left = curX - width; top = clipEventState.top; } // 一定要补上leftmargin _this.clipRect.style.left = left + _this.marginLeft + 'px'; _this.clipRect.style.top = top + 'px'; _this.clipRect.style.width = width + 'px'; _this.clipRect.style.height = height + 'px'; _this.draw(); }; this.container.addEventListener('touchmove', moving); this.container.addEventListener('mousemove', moving); this.events.touchmove = moving; this.events.mousemove = moving; var startResize = function startResize(e) { _this.canResizing = true; _this.canvasMag.classList.remove('clip-hidden'); if (_this.options.sizeTipsStyle === 0) { _this.clipTips.classList.remove('clip-hidden'); } saveEventState(e); }; var endResize = function endResize() { _this.canResizing = false; _this.canvasMag.classList.add('clip-hidden'); if (_this.options.sizeTipsStyle === 0) { _this.clipTips.classList.add('clip-hidden'); } }; this.endHronsResize = endResize; for (var i = 0; i < 8; i += 1) { this.clipRectHorns[i].addEventListener('mousedown', startResize); this.clipRectHorns[i].addEventListener('touchstart', startResize); this.clipRectHorns[i].addEventListener('mouseup', endResize); this.clipRectHorns[i].addEventListener('touchend', endResize); } } }, { key: 'listenerRectMove', value: function listenerRectMove() { var _this2 = this; var rectDom = this.clipRect; var moving = function moving(e) { if (_this2.canResizing || !_this2.canMove) { return; } e.preventDefault(); e.stopPropagation(); var MIN_DIFF = _this2.options.minMoveDiff; var mouseY = e.touches ? e.touches[0].pageY : e.pageY; var mouseX = e.touches ? e.touches[0].pageX : e.pageX; var diffX = mouseX - _this2.prevRectMouseX; var diffY = mouseY - _this2.prevRectMouseY; if (!diffX && !diffY) { return; } if (Math.abs(diffX) > MIN_DIFF || Math.abs(diffY) > MIN_DIFF) { _this2.prevRectMouseX = mouseX; _this2.prevRectMouseY = mouseY; } var top = rectDom.offsetTop + diffY; var left = rectDom.offsetLeft + diffX; if (top < 0) { top = 0; } else if (top > _this2.canvasFull.offsetHeight - rectDom.offsetHeight) { top = _this2.canvasFull.offsetHeight - rectDom.offsetHeight; } if (left < _this2.marginLeft) { left = _this2.marginLeft; } else if (left > _this2.canvasFull.offsetWidth - rectDom.offsetWidth + _this2.marginLeft) { left = _this2.canvasFull.offsetWidth - rectDom.offsetWidth + _this2.marginLeft; } // 这里无须再补上marginLeft _this2.clipRect.style.left = left + 'px'; _this2.clipRect.style.top = top + 'px'; _this2.draw(); }; rectDom.addEventListener('touchmove', moving); rectDom.addEventListener('mousemove', moving); var startMove = function startMove(e) { _this2.canMove = true; var mouseY = e.touches ? e.touches[0].pageY : e.pageY; var mouseX = e.touches ? e.touches[0].pageX : e.pageX; _this2.prevRectMouseX = mouseX; _this2.prevRectMouseY = mouseY; }; var endMove = function endMove() { _this2.canMove = false; }; this.endRectMove = endMove; rectDom.addEventListener('mousedown', startMove); rectDom.addEventListener('touchstart', startMove); rectDom.addEventListener('mouseup', endMove); rectDom.addEventListener('touchend', endMove); } }, { key: 'listenerContainerLeave', value: function listenerContainerLeave() { var _this3 = this; var leaveContainer = function leaveContainer() { if (_this3.canResizing) { _this3.endHronsResize(); } if (_this3.canMove) { _this3.endRectMove(); } }; this.container.addEventListener('mouseleave', leaveContainer); this.container.addEventListener('mouseup', leaveContainer); this.events.mouseleave = leaveContainer; this.events.mouseup = leaveContainer; } }, { key: 'draw', value: function draw() { // 放大镜 this.drawMag(); var realImgSize = this.getRealFinalImgSize(this.clipRect.offsetWidth * this.RATIO_PIXEL, this.clipRect.offsetHeight * this.RATIO_PIXEL); var curWidth = realImgSize.width; var curHeight = realImgSize.height; this.clipTips.innerText = curWidth.toFixed(0) + '*' + curHeight.toFixed(0); this.ctxFull.save(); if (this.rotateStep & 1) { this.ctxFull.clearRect(0, 0, this.canvasFull.height, this.canvasFull.width); } else { this.ctxFull.clearRect(0, 0, this.canvasFull.width, this.canvasFull.height); } this.drawImage(); this.drawMask(); this.ctxFull.beginPath(); var params = this.getClipRectParams(); var srcX = params.srcX; var srcY = params.srcY; var sWidth = params.sWidth; var sHeight = params.sHeight; this.ctxFull.rect(srcX, srcY, sWidth, sHeight); this.ctxFull.clip(); this.drawImage(); this.ctxFull.restore(); } }, { key: 'getClipRectParams', value: function getClipRectParams() { var offsetTop = this.clipRect.offsetTop; // 减去margin才是真实的 var offsetLeft = this.clipRect.offsetLeft - this.marginLeft; var offsetWidth = this.clipRect.offsetWidth; var offsetHeight = this.clipRect.offsetHeight; var offsetRight = offsetLeft + offsetWidth; var offsetBottom = offsetTop + offsetHeight; var srcX = offsetLeft; var srcY = offsetTop; var sWidth = offsetWidth; var sHeight = offsetHeight; if (this.rotateStep === 1) { srcX = offsetTop; srcY = this.canvasFull.offsetWidth - offsetRight; sWidth = offsetHeight; sHeight = offsetWidth; } else if (this.rotateStep === 2) { srcX = this.canvasFull.offsetWidth - offsetRight; srcY = this.canvasFull.offsetHeight - offsetBottom; sWidth = offsetWidth; sHeight = offsetHeight; } else if (this.rotateStep === 3) { srcX = this.canvasFull.offsetHeight - offsetBottom; srcY = offsetLeft; sWidth = offsetHeight; sHeight = offsetWidth; } srcX *= this.RATIO_PIXEL; srcY *= this.RATIO_PIXEL; sWidth *= this.RATIO_PIXEL; sHeight *= this.RATIO_PIXEL; return { srcX: srcX, srcY: srcY, sWidth: sWidth, sHeight: sHeight }; } }, { key: 'getRealCoordinate', value: function getRealCoordinate(mouseX, mouseY) { // 获取真实坐标系（旋转缩放后的） var x = mouseX; var y = mouseY; if (this.rotateStep === 1) { x = mouseY; y = this.canvasFull.offsetWidth - mouseX; } else if (this.rotateStep === 2) { x = this.canvasFull.offsetWidth - mouseX; y = this.canvasFull.offsetHeight - mouseY; } else if (this.rotateStep === 3) { x = this.canvasFull.offsetHeight - mouseY; y = mouseX; } x *= this.RATIO_PIXEL; y *= this.RATIO_PIXEL; return { x: x, y: y }; } }, { key: 'drawImage', value: function drawImage() { // 宽高在旋转不同的情况下是颠倒的 if (this.rotateStep & 1) { this.ctxFull.drawImage(this.img, 0, 0, this.img.width, this.img.height, 0, 0, this.canvasFull.height, this.canvasFull.width); } else { this.ctxFull.drawImage(this.img, 0, 0, this.img.width, this.img.height, 0, 0, this.canvasFull.width, this.canvasFull.height); } } }, { key: 'drawMask', value: function drawMask() { this.ctxFull.save(); this.ctxFull.fillStyle = 'rgba(0, 0, 0, 0.3)'; if (this.rotateStep & 1) { this.ctxFull.fillRect(0, 0, this.canvasFull.height, this.canvasFull.width); } else { this.ctxFull.fillRect(0, 0, this.canvasFull.width, this.canvasFull.height); } this.ctxFull.restore(); } }, { key: 'drawMag', value: function drawMag() { var captureRadius = this.options.captureRadius; var centerPoint = this.getRealCoordinate(this.curX, this.curY); var sWidth = captureRadius * 2; var sHeight = captureRadius * 2; var srcX = centerPoint.x - captureRadius; var srcY = centerPoint.y - captureRadius; if (this.rotateStep & 1) { this.ctxMag.clearRect(0, 0, this.canvasMag.height, this.canvasMag.width); } else { this.ctxMag.clearRect(0, 0, this.canvasMag.width, this.canvasMag.height); } var drawX = 0; var drawY = 0; if (this.os.ios) { // 兼容ios的Safari不能绘制srcX,srcY为负的情况 if (srcY < 0) { // 注意先后顺序 drawY = this.canvasMag.height / 2 * Math.abs(srcY / captureRadius); srcY = 0; } if (srcX < 0) { // 注意先后顺序 drawX = this.canvasMag.width / 2 * Math.abs(srcX / captureRadius); srcX = 0; } } // 生成新的图片,内部坐标会使用原图片的尺寸 this.ctxMag.drawImage(this.img, srcX / this.scale, srcY / this.scale, sWidth / this.scale, sHeight / this.scale, drawX, drawY, this.canvasMag.width, this.canvasMag.height); var centerX = this.canvasMag.width / 2; var centerY = this.canvasMag.height / 2; var radius = 5 * this.RATIO_PIXEL; // 绘制十字校准 this.ctxMag.beginPath(); this.ctxMag.moveTo(centerX - radius, centerY); this.ctxMag.lineTo(centerX + radius, centerY); // this.ctxMag.arc(centerX + radius, centerY, 3, 0, 2 * Math.PI); this.ctxMag.moveTo(centerX, centerY - radius); this.ctxMag.lineTo(centerX, centerY + radius); // this.ctxMag.arc(centerX, centerY + radius, 3, 0, 2 * Math.PI); this.ctxMag.strokeStyle = '#de3c50'; this.ctxMag.lineWidth = 3; this.ctxMag.stroke(); } }, { key: 'initMagnifier', value: function initMagnifier() { this.canvasMag = document.createElement('canvas'); this.canvasMag.className = 'magnifier clip-hidden'; this.ctxMag = this.canvasMag.getContext('2d'); this.smoothCtx(this.ctxMag); this.container.appendChild(this.canvasMag); this.domChildren.push(this.canvasMag); // 需要初始化一个高度，否则如果旋转时会造不对 // 捕获直径*像素比 this.canvasMag.width = this.options.captureRadius * 2 * this.RATIO_PIXEL; this.canvasMag.height = this.options.captureRadius * 2 * this.RATIO_PIXEL; } }, { key: 'initTransferCanvas', value: function initTransferCanvas() { this.canvasTransfer = document.createElement('canvas'); this.canvasTransfer.style.display = 'none'; this.canvasTransfer.className = 'transfer-canvas'; this.ctxTransfer = this.canvasTransfer.getContext('2d'); this.smoothCtx(this.ctxTransfer); this.container.appendChild(this.canvasTransfer); this.domChildren.push(this.canvasTransfer); } }, { key: 'smoothCtx', value: function smoothCtx(ctx) { var isSmooth = this.options.isSmooth; ctx.mozImageSmoothingEnabled = isSmooth; ctx.webkitImageSmoothingEnabled = isSmooth; ctx.msImageSmoothingEnabled = isSmooth; ctx.imageSmoothingEnabled = isSmooth; } }, { key: 'getRealFinalImgSize', value: function getRealFinalImgSize(curWidth, curHeight) { var wPerH = this.canvasFull.width / this.canvasFull.height; var maxWidth = this.options.maxWidth || 0; var forceWidth = this.options.forceWidth || 0; var forceHeight = this.options.forceHeight || 0; var width = curWidth; var height = curHeight; if (this.rotateStep & 1) { if (this.options.isUseOriginSize || this.canvasFull.width > this.img.height) { // 最大不会超过原图的尺寸 width = this.img.width * curWidth / this.canvasFull.height; height = this.img.height * curHeight / this.canvasFull.width; } if (maxWidth && this.canvasFull.height > maxWidth && maxWidth < this.img.height) { // 使用最大宽，前提是原始大小也大于最大宽 width = maxWidth * curWidth / this.canvasFull.height; height = maxWidth / wPerH * curHeight / this.canvasFull.width; } if (forceWidth) { // 使用固定宽 width = forceWidth * curWidth / this.canvasFull.height; height = (forceHeight || forceWidth / wPerH) * curHeight / this.canvasFull.width; } } else { if (this.options.isUseOriginSize || this.canvasFull.width > this.img.width) { // 最大不会超过原图的尺寸 width = this.img.width * curWidth / this.canvasFull.width; height = this.img.height * curHeight / this.canvasFull.height; } if (maxWidth && this.canvasFull.width > maxWidth && maxWidth < this.img.width) { width = maxWidth * curWidth / this.canvasFull.width; height = maxWidth / wPerH * curHeight / this.canvasFull.height; } if (forceWidth) { // 使用固定宽 width = forceWidth * curWidth / this.canvasFull.width; height = (forceHeight || forceWidth / wPerH) * curHeight / this.canvasFull.height; } } return { width: width, height: height }; } /** * 裁剪 */ }, { key: 'clip', value: function clip() { var params = this.getClipRectParams(); var srcX = params.srcX; var srcY = params.srcY; var sWidth = params.sWidth; var sHeight = params.sHeight; var realImgSize = this.getRealFinalImgSize(sWidth, sHeight); var curWidth = realImgSize.width; var curHeight = realImgSize.height; // 注意，这个变量可能不存在，会影响判断的，所以要确保它存在 this.rotateStep = this.rotateStep || 0; // 计算弧度 var degree = this.rotateStep * 90 * Math.PI / 180; // 内部的转换矩阵也需要旋转（只不过不需要展示而已-譬如平移操作就无必要） // 注意，重置canvas大小后，以前的rotate也会无效- // 否则如果不重置，直接rotate是会在以前的基础上 if (this.rotateStep === 0) { this.canvasTransfer.width = curWidth; this.canvasTransfer.height = curHeight; } else if (this.rotateStep === 1) { this.canvasTransfer.width = curHeight; this.canvasTransfer.height = curWidth; this.ctxTransfer.rotate(degree); this.ctxTransfer.translate(0, -this.canvasTransfer.width); } else if (this.rotateStep === 2) { this.canvasTransfer.width = curWidth; this.canvasTransfer.height = curHeight; this.ctxTransfer.rotate(degree); this.ctxTransfer.translate(-this.canvasTransfer.width, -this.canvasTransfer.height); } else if (this.rotateStep === 3) { this.canvasTransfer.width = curHeight; this.canvasTransfer.height = curWidth; this.ctxTransfer.rotate(degree); this.ctxTransfer.translate(-this.canvasTransfer.height, 0); } // 生成新的图片,内部坐标会使用原图片的尺寸 // 宽高在旋转不同的情况下是颠倒的 if (this.rotateStep & 1) { this.ctxTransfer.drawImage(this.img, srcX / this.scale, srcY / this.scale, sWidth / this.scale, sHeight / this.scale, 0, 0, this.canvasTransfer.height, this.canvasTransfer.width); } else { this.ctxTransfer.drawImage(this.img, srcX / this.scale, srcY / this.scale, sWidth / this.scale, sHeight / this.scale, 0, 0, this.canvasTransfer.width, this.canvasTransfer.height); } this.clipImgData = this.canvasTransfer.toDataURL(this.options.mime, this.options.quality); } }, { key: 'resetClipRect', value: function resetClipRect() { this.clipRect.style.left = (this.marginLeft || 0) + 'px'; this.clipRect.style.top = 0; this.clipRect.style.width = this.canvasFull.width / this.RATIO_PIXEL + 'px'; this.clipRect.style.height = this.canvasFull.height / this.RATIO_PIXEL + 'px'; this.draw(); } }, { key: 'getClipImgData', value: function getClipImgData() { return this.clipImgData; } }, { key: 'rotate', value: function rotate(isClockWise) { // 最小和最大旋转方向 var MIN_STEP = 0; var MAX_STEP = 3; var width = this.oldWidth; var height = this.oldHeight; this.rotateStep = this.rotateStep || 0; this.rotateStep += isClockWise ? 1 : -1; if (this.rotateStep > MAX_STEP) { this.rotateStep = MIN_STEP; } else if (this.rotateStep < MIN_STEP) { this.rotateStep = MAX_STEP; } // 计算弧度 var degree = this.rotateStep * 90 * Math.PI / 180; // 重置canvas,重新计算旋转 this.canvasMag.width = this.canvasMag.width; this.canvasMag.height = this.canvasMag.height; // 同时旋转mag canvas if (this.rotateStep === 0) { this.resizeCanvas(width, height); } else if (this.rotateStep === 1) { this.resizeCanvas(height, width); this.ctxFull.rotate(degree); this.ctxFull.translate(0, -this.canvasFull.width); this.ctxMag.rotate(degree); this.ctxMag.translate(0, -this.canvasMag.width); } else if (this.rotateStep === 2) { this.resizeCanvas(width, height); this.ctxFull.rotate(degree); this.ctxFull.translate(-this.canvasFull.width, -this.canvasFull.height); this.ctxMag.rotate(degree); this.ctxMag.translate(-this.canvasMag.width, -this.canvasMag.height); } else if (this.rotateStep === 3) { this.resizeCanvas(height, width); this.ctxFull.rotate(degree); this.ctxFull.translate(-this.canvasFull.height, 0); this.ctxMag.rotate(degree); this.ctxMag.translate(-this.canvasMag.height, 0); } this.resetClipRect(); } }, { key: 'destroy', value: function destroy() { this.clear(); this.canvasFull = null; this.ctxFull = null; this.canvasTransfer = null; this.ctxTransfer = null; this.canvasMag = null; this.ctxMag = null; this.clipRect = null; } }]); return ImgClip; }(); return ImgClip$1; }))); $(".crop-image").html('<div class="clip-content">\ <div class="upload-container choose-gallery" style="display: none">\ <div class="upload-pretty button-three-dimen">\ <input type="file" id="targetImg">本地上传\ </div>\ </div>\ <div class="upload-container choose-camera" style="display: none">\ <div class="upload-pretty button-three-dimen">\ <input type="file" id="targetImgCamera" accept="image/*" multiple>手机拍摄\ </div>\ </div>\ <div class="img-clip"></div>\ <nav class="clip-action nav-bar nav-bar-tab hidden">\ <a class="tab-item" id="btn-reload">\ <span class="mui-icon mui-icon-arrowleft tab-icon"></span>\ <span class="tab-label hidden">取消</span>\ </a>\ <a class="tab-item " id="btn-rotate-anticlockwise">\ <span class="mui-icon mui-icon-refreshempty tab-icon rotate90"></span>\ <span class="tab-label hidden">逆时针旋转</span>\ </a>\ <a class="tab-item " id="btn-rotate-clockwise">\ <span class="mui-icon mui-icon-refreshempty tab-icon"></span>\ <span class="tab-label hidden">顺时针旋转</span>\ </a>\ <a class="tab-item hidden" id="btn-maxrect">\ <span class="mui-icon mui-icon-navigate tab-icon"></span>\ <span class="tab-label hidden">最大选择</span>\ </a>\ <a class="tab-item" id="btn-verify">\ <span class="mui-icon mui-icon-checkmarkempty tab-icon"></span>\ <span class="tab-label hidden">确定</span>\ </a>\ </nav>\ </div>'); var chooseGallery; var chooseCamera; var cropImage; var imgData; var clipContent; var clipAction; var showContent; var showImg; var targetImg; var targetImgCamera; var successFile; initPage(); function initPage() { initParams(); initListeners(); initImgClip(); } function initParams() { targetImg = document.querySelector('#targetImg'); targetImgCamera = document.querySelector('#targetImgCamera'); chooseGallery = document.querySelector('.choose-gallery'); chooseCamera = document.querySelector('.choose-camera'); clipContent = document.querySelector('.clip-content'); clipAction = document.querySelector('.clip-action'); showContent = document.querySelector('.show-content'); showImg = document.querySelector('.show-img'); } function initImgClip() { new FileInput({ container: '#targetImg', isMulti: false, type: 'Image_Camera', success: function(b64, file, detail) { // console.log("选择:" + b64); console.log("fileName:" + file.name); loadImg(b64); }, error: function(error) { console.error(error); } }); new FileInput({ container: '#targetImgCamera', isMulti: false, type: 'Camera', success: function(b64, file, detail) { // console.log("选择:" + b64); console.log("fileName:" + file.name); loadImg(b64); }, error: function(error) { console.error(error); } }); } function loadImg(b64) { changeImgClipShow(true); var img = new Image(); img.src = b64; img.onload = function() { EXIF.getData(img, function() { var orientation = EXIF.getTag(this, 'Orientation'); cropImage && cropImage.destroy(); cropImage = new ImageClip({ container: '.img-clip', img, // 0代表按下才显示，1恒显示，-1不显示 sizeTipsStyle: 0, // 为1一般是屏幕像素x2这个宽高 // 最终的大小为：屏幕像素*屏幕像素比（手机中一般为2）*compressScaleRatio compressScaleRatio: 1.1, // iphone中是否继续放大：x*iphoneFixedRatio // 最好compressScaleRatio*iphoneFixedRatio不要超过2 iphoneFixedRatio: 1.8, // 减去顶部间距，底部bar,以及显示间距 maxCssHeight: window.innerHeight - 100 - 50 - 20, // 放大镜捕获的图像半径 captureRadius: 30, // 是否采用原图像素（不会压缩） isUseOriginSize: false, // 增加最大宽度，增加后最大不会超过这个宽度 maxWidth: 0, // 是否固定框高，优先级最大，设置后其余所有系数都无用直接使用这个固定的宽，高度自适应 forceWidth: 0, // 同上，但是一般不建议设置，因为很可能会改变宽高比导致拉升，特殊场景下使用 forceHeight: 0, // 压缩质量 quality: 0.92, mime: 'image/jpeg', }); // 6代表图片需要顺时针修复（默认逆时针处理了，所以需要顺过来修复） switch (orientation) { case 6: cropImage.rotate(true); break; default: break; } }); }; } function resizeShowImg(b64) { var img = new Image(); img.src = b64; img.onload = showImgOnload; } function showImgOnload() { // 必须用一个新的图片加载，否则如果只用showImg的话永远都是第1张 // margin的话由于有样式，所以自动控制了 var width = this.width; var height = this.height; var wPerH = width / height; var MAX_WIDTH = Math.min(window.innerWidth, width); var MAX_HEIGHT = Math.min(window.innerHeight - 50 - 100, height); var legalWidth = MAX_WIDTH; var legalHeight = legalWidth / wPerH; if (MAX_WIDTH && legalWidth > MAX_WIDTH) { legalWidth = MAX_WIDTH; legalHeight = legalWidth / wPerH; } if (MAX_HEIGHT && legalHeight > MAX_HEIGHT) { legalHeight = MAX_HEIGHT; legalWidth = legalHeight * wPerH; } var marginTop = (window.innerHeight - 50 - legalHeight) / 2; showImg.style.marginTop = marginTop + 'px'; showImg.style.width = legalWidth + 'px'; showImg.style.height = legalHeight + 'px'; } function changeImgClipShow(isClip) { if (isClip) { chooseGallery.classList.add('hidden'); chooseCamera.classList.add('hidden'); clipAction.classList.remove('hidden'); } else { chooseGallery.classList.remove('hidden'); clipContent.classList.add('hidden'); chooseCamera.classList.remove('hidden'); clipAction.classList.add('hidden'); // 需要改变input，否则下一次无法change targetImg.value = ''; targetImgCamera.value = ''; } } function initListeners() { document.querySelector('#btn-reload').addEventListener('click', function() { cropImage && cropImage.destroy(); changeImgClipShow(false); }); // document.querySelector('#btn-back').addEventListener('click', function() { // changeContent(false); // }); // document.querySelector('#btn-save').addEventListener('click', function() { // // downloadFile(imgData); // upload(function() { // tips('上传成功'); // }); // }); // document.querySelector('#btn-detail').addEventListener('click', function() { // showImgDataLen(imgData); // }); document.querySelector('#btn-maxrect').addEventListener('click', function() { if (!cropImage) { tips('请选择图片'); return; } cropImage.resetClipRect(); }); document.querySelector('#btn-rotate-anticlockwise').addEventListener('click', function() { if (!cropImage) { tips('请选择图片'); return; } cropImage.rotate(false); }); document.querySelector('#btn-rotate-clockwise').addEventListener('click', function() { if (!cropImage) { tips('请选择图片'); return; } cropImage.rotate(true); }); document.querySelector('#btn-verify').addEventListener('click', function() { if (!cropImage) { tips('请选择图片'); return; } var isConfirm = confirm("是否裁剪图片并处理？"); if (isConfirm) { cropImage.clip(false); imgData = cropImage.getClipImgData(); recognizeImg(function() { changeContent(true); }, function(error) { tips(JSON.stringify(error), true); }); } }); } function cropShow() { $(".crop-image .clip-content").removeClass("hidden").show(); } function cropStart() { $(".crop-image #targetImgCamera").trigger("click"); } function showImgDataLen(imgData) { var len = imgData.length; var sizeStr = len + 'B'; if (len > 1024 * 1024) { sizeStr = (Math.round(len / (1024 * 1024))).toString() + 'MB'; } else if (len > 1024) { sizeStr = (Math.round(len / 1024)).toString() + 'KB'; } tips('处理后大小：' + sizeStr); } function tips(msg, isAlert) { if (isAlert) { alert(msg); } else { toast(msg); } } function toast(message) { var CLASS_ACTIVE = 'mui-active'; var duration = 2000; var toastDiv = document.createElement('div'); toastDiv.classList.add('mui-toast-container'); toastDiv.innerHTML = `<div class="mui-toast-message">${message}</div>`; toastDiv.addEventListener('webkitTransitionEnd', () => { if (!toastDiv.classList.contains(CLASS_ACTIVE)) { toastDiv.parentNode.removeChild(toastDiv); toastDiv = null; } }); // 点击则自动消失 toastDiv.addEventListener('click', () => { toastDiv.parentNode.removeChild(toastDiv); toastDiv = null; }); document.body.appendChild(toastDiv); toastDiv.classList.add(CLASS_ACTIVE); setTimeout(function() { toastDiv && toastDiv.classList.remove(CLASS_ACTIVE); }, duration); } function changeContent(isShowContent) { if (isShowContent) { // showContent.classList.remove('hidden'); clipContent.classList.add('hidden'); // resizeShowImg(imgData); // showImg.src = imgData; cropSuccess(imgData,dataURLtoFile(imgData,$('input[id="targetImgCamera"]')[0].files[0].name)); $('input[id="targetImgCamera"]').val(''); // console.log(imgData) } else { showContent.classList.add('hidden'); clipContent.classList.remove('hidden'); } } function b64ToBlob(urlData) { var arr = urlData.split(','); var mime = arr[0].match(/:(.*?);/)[1] || 'image/png'; // 去掉url的头，并转化为byte var bytes = window.atob(arr[1]); // 处理异常,将ascii码小于0的转换为大于0 var ab = new ArrayBuffer(bytes.length); // 生成视图（直接针对内存）：8位无符号整数，长度1个字节 var ia = new Uint8Array(ab); for (var i = 0; i < bytes.length; i++) { ia[i] = bytes.charCodeAt(i); } return new Blob([ab], { type: mime }); } function downloadFile(content) { // Convert image to 'octet-stream' (Just a download, really) var imageObj = content.replace("image/jpeg", "image/octet-stream"); window.location.href = imageObj; } function recognizeImg(success, error) { // 里面正常有：裁边，摆正，梯形矫正，锐化等算法操作 success(); } function upload(success, error) { success(); } function dataURLtoFile(dataurl, filename) { var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1], bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n); while(n--){ u8arr[n] = bstr.charCodeAt(n); } return new File([u8arr], filename, {type:mime}); }
3.加入裁剪图片的html
<div class="crop-image"></div>
4.点击图片上传时调用
cropStart()
5.选择好图片后调用cropShow方法，注意这里绑定的是crop自带的文件输入框。
//转成base64 $('input[type=file]').on('change', function () { var reader = new FileReader() reader.onload = function (e) { cropShow() } reader.readAsDataURL(this.files[0]) })
6.重写cropSuccess方法，裁剪完成后会自动调用此方法。
base64为裁剪完的图片的src值，可以设到img标签中。
file为裁剪完的图片的File值，用作文件上传的参数。
var frontFile var sideFile function cropSuccess(base64,file) { if(sessionStorage.pic == "front"){ frontFile = file $(".frontPic").attr("src", base64) frontPicFlag = true $(".delete-img").css("display","inline") }else if(sessionStorage.pic == "side"){ sideFile = file $(".sidePic").attr("src", base64) sidePicFlag = true $(".delete-side-img").css("display","inline") } }
7.封装上传参数
var formData = new FormData() formData.append('file',frontFile)
即可调用接口上传图片。