node-merge-images
Version:
Merges images. You can optionally set the merging orientation (vertical or horizontal), margins between images, etc.
2 lines (1 loc) • 8.72 kB
JavaScript
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s={bitsPerSample:Number,compression:Number,exifImageLength:Number,exifImageWidth:Number,exifOffset:Number,exposureProgram:Number,flash:Number,imageLength:Number,imageWidth:Number,isoSpeedRatings:Number,jpegInterchangeFormat:Number,jpegInterchangeFormatLength:Number,lightSource:Number,meteringMode:Number,orientation:Number,photometricInterpretation:Number,planarConfiguration:Number,resolutionUnit:Number,rowsPerStrip:Number,samplesPerPixel:Number,sensingMethod:Number,stripByteCounts:Number,subSecTime:Number,subSecTimeDigitized:Number,subSecTimeOriginal:Number,customRendered:Number,exposureMode:Number,focalLengthIn35mmFilm:Number,gainControl:Number,saturation:Number,sharpness:Number,subjectDistanceRange:Number,subSecTime:Number,subSecTimeDigitized:Number,subSecTimeOriginal:Number,whiteBalance:Number,sceneCaptureType:Number,dateTime:n,dateTimeDigitized:n,dateTimeOriginal:n};e.readMetadata=function(t,r){return e.identify(["-format","%[EXIF:*]",t],(function(t,e){var i={};t||e.split(/\n/).forEach((function(t){var e=t.indexOf("=");if(-1!==e){var r=t.substr(0,e).replace("/","-"),n=t.substr(e+1).trim(),a="default",u=r.indexOf(":");if(-1!==u&&(a=r.substr(0,u),r=r.substr(u+1),"exif"===a)){r=o(r);var h=s[r];h&&(n=h(n))}a in i?i[a][r]=n:i[a]={key:n}}})),r(t,i)}))},e.convert=function(t,r,n){var o={encoding:"binary"};return"function"==typeof r?(n=r,r=0):"number"!=typeof r&&(r=0),r&&(r=parseInt(r))>0&&!isNaN(r)&&(o.timeout=r),i(e.convert.path,t,o,n)},e.convert.path="convert";var h=function(t,r){var i=e.convert(t.args,t.opt.timeout,r);return t.opt.srcPath.match(/-$/)&&("string"==typeof t.opt.srcData?(i.stdin.setEncoding("binary"),i.stdin.write(t.opt.srcData,"binary"),i.stdin.end()):i.stdin.end(t.opt.srcData)),i};e.resize=function(t,r){var i=e.resizeArgs(t);return h(i,r)},e.crop=function(t,r){if("object"!=typeof t)throw new TypeError("First argument must be an object");if(!t.srcPath&&!t.srcData)throw new TypeError("No srcPath or data defined");if(!t.height&&!t.width)throw new TypeError("No width or height defined");if(t.srcPath)var i=t.srcPath;else i={data:t.srcData};e.identify(i,(function(i,n){if(i)return r&&r(i);var o=e.resizeArgs(t),s=!1,a=!1,u=[];o.args.forEach((function(e){if(!0===a&&(console.log("arg",e),a=!1),s||"-resize"==e||u.push(e),"-resize"==e&&(console.log("resize arg"),s=!0,a=!0),"-crop"===e&&(console.log("crop arg"),a=!0),"-resize"!=e&&s){var r=n.width/n.height<o.opt.width/o.opt.height?o.opt.width+"x":"x"+o.opt.height,i=t.gravity?t.gravity:"Center";u=u.concat(["-resize",r,"-gravity",i,"-crop",o.opt.width+"x"+o.opt.height+"+0+0","+repage"]),s=!1}})),o.args=u,h(o,r)}))},e.resizeArgs=function(t){var e={srcPath:null,srcData:null,srcFormat:null,dstPath:null,quality:.8,format:"jpg",progressive:!1,colorspace:null,width:0,height:0,strip:!0,filter:"Lagrange",sharpening:.2,customArgs:[],timeout:0};if("object"!=typeof t)throw new Error("first argument must be an object");for(var r in e)r in t&&(e[r]=t[r]);if(!e.srcPath&&!e.srcData)throw new Error("both srcPath and srcData are empty");if(e.format||(e.format="jpg"),e.srcPath||(e.srcPath=e.srcFormat?e.srcFormat+":-":"-"),e.dstPath||(e.dstPath=e.format?e.format+":-":"-"),0===e.width&&0===e.height)throw new Error("both width and height can not be 0 (zero)");var i=[e.srcPath];e.sharpening>0&&(i=i.concat(["-set","option:filter:blur",String(1-e.sharpening)])),e.filter&&(i.push("-filter"),i.push(e.filter)),e.strip&&i.push("-strip"),(e.width||e.height)&&(i.push("-resize"),0===e.height?i.push(String(e.width)):0===e.width?i.push("x"+String(e.height)):i.push(String(e.width)+"x"+String(e.height))),e.format=e.format.toLowerCase();var n="jpg"===e.format||"jpeg"===e.format;return n&&e.progressive&&(i.push("-interlace"),i.push("plane")),n||"png"===e.format?(i.push("-quality"),i.push(Math.round(100*e.quality).toString())):"miff"!==e.format&&"mif"!==e.format||(i.push("-quality"),i.push(Math.round(9*e.quality).toString())),e.colorspace&&(i.push("-colorspace"),i.push(e.colorspace)),Array.isArray(e.customArgs)&&e.customArgs.length&&(i=i.concat(e.customArgs)),i.push(e.dstPath),{opt:e,args:i}}}));h.identify,h.readMetadata,h.convert,h.resize,h.crop,h.resizeArgs;const c=require("fs-extra");module.exports=async(t,e,r={})=>new Promise(((i,n)=>{try{r=Object.assign({direction:"vertical",background:"white",offset:0},r),function(t,e,r){if(!Array.isArray(t))throw new TypeError("inputPaths must be an array that contains images");if(t.length<1)throw new TypeError("At least inputPaths must contain more than one image");if(!e)throw new TypeError("outputPath should be a file path");if(!/^(vertical|horizontal)$/.test(r.direction))throw new TypeError('The direction option should be "vertical" or "horizontal"');if(r.offset<0)throw new TypeError("The offset option should be a number greater than or equal to 0");const i=t.filter((t=>!o.default.existsSync(t)));if(i.length>0)throw new TypeError(`Input path ${i.join(", ")} not found`)}(t,e,r);const a=[];a.push("-background"),a.push(r.background),a.push("-size"),a.push("vertical"===r.direction?`x${r.offset}`:`${r.offset}x`),a.push(t[0]);for(let e of t.slice(1))r.offset>0&&a.push("xc:none"),a.push(e);a.push("vertical"===r.direction?"-append":"+append"),a.push(e),o.default.existsSync(s.default.dirname(e))||(c.mkdirsSync(s.default.dirname(e)),o.default.chmodSync(s.default.dirname(e),493)),h.convert(a,(t=>{t?n(t):i()}))}catch(t){n(t)}}));