How to use imagemagick - 10 common examples
To help you get started, we’ve selected a few imagemagick examples, based on popular ways it is used in public projects.
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Hanul / UPPERCASE / UPPERCASE.IO-UTIL / NODE.js View on Github 
// callback.
callback,
// error handler.
errorHandler;
if (callbackOrHandlers !== undefined) {
if (CHECK_IS_DATA(callbackOrHandlers) !== true) {
callback = callbackOrHandlers;
} else {
callback = callbackOrHandlers.success;
errorHandler = callbackOrHandlers.error;
}
}
imagemagick.convert(params, function(error) {
var
// error msg
errorMsg;
if (error !== TO_DELETE) {
errorMsg = error.toString();
if (errorHandler !== undefined) {
errorHandler(errorMsg);
} else {
console.log(CONSOLE_RED('[UPPERCASE.IO-IMAGEMAGICK_CONVERT] ERROR: ' + errorMsg));
}
} else {// callback.
callback,
// error handler.
errorHandler;
if (callbackOrHandlers !== undefined) {
if (CHECK_IS_DATA(callbackOrHandlers) !== true) {
callback = callbackOrHandlers;
} else {
callback = callbackOrHandlers.success;
errorHandler = callbackOrHandlers.error;
}
}
imagemagick.convert(params, function(error) {
var
// error msg
errorMsg;
if (error !== TO_DELETE) {
errorMsg = error.toString();
if (errorHandler !== undefined) {
errorHandler(errorMsg);
} else {
console.log(CONSOLE_RED('[UPPERCASE-IMAGEMAGICK_CONVERT] ERROR: ' + errorMsg));
}
} else {format = "jpg";
} else if (/PNG/i.test(format)) {
format = "png";
} else {
throw new Error("Unrecognized iTunes Artwork format: \"" + format +'"')
}
var args = req.parsedUrl.query;
if (args) {
if (args.size) args.width = args.height = args.size;
this.parallel()(null, args.format || format);
args.srcData = rawData.toString('binary');
args.srcFormat = format;
args.format = args.format || format;
delete args.dstPath;
im.resize(args, this.parallel());
} else {
// No query params given, just send the original image data.
this.parallel()(null, format);
this.parallel()(null, rawData);
}
},
function(err, format, rawData) {// callback.
callback,
// error handler.
errorHandler;
if (callbackOrHandlers !== undefined) {
if (CHECK_IS_DATA(callbackOrHandlers) !== true) {
callback = callbackOrHandlers;
} else {
callback = callbackOrHandlers.success;
errorHandler = callbackOrHandlers.error;
}
}
imagemagick.convert(params, function(error) {
var
// error msg
errorMsg;
if (error !== TO_DELETE) {
errorMsg = error.toString();
if (errorHandler !== undefined) {
errorHandler(errorMsg);
} else {
SHOW_ERROR('[UPPERCASE-IMAGEMAGICK_CONVERT] ERROR: ' + errorMsg);
}
} else {// callback.
callback,
// error handler.
errorHandler;
if (callbackOrHandlers !== undefined) {
if (CHECK_IS_DATA(callbackOrHandlers) !== true) {
callback = callbackOrHandlers;
} else {
callback = callbackOrHandlers.success;
errorHandler = callbackOrHandlers.error;
}
}
imagemagick.convert(params, function(error) {
var
// error msg
errorMsg;
if (error !== TO_DELETE) {
errorMsg = error.toString();
if (errorHandler !== undefined) {
errorHandler(errorMsg);
} else {
SHOW_ERROR('[UPPERCASE-IMAGEMAGICK_CONVERT] ERROR: ' + errorMsg);
}
} else {tasks.push(function(cb) {
// invoke 'convert'
im.convert(convertArgs, function(err, stdout, stderr) {
if(err) return cb(err);
// run identify in the styled image
im.identify(styleFilePath, function(err, atts) {
if(err) return cb(err);
finishConversion(styleFilePath, atts, cb);
});
});
}); // tasks.push
} else {return new Promise(function (res, rej) {
im.convert(params, (err) => {
if (err) {
console.log(`Error${err}`);
rej(err);
} else {
res('operation completed successfully');
}
});
});
}im.identify(source, function (err, imageData) {
if (err)
throw new Error('Image-Watermark::embedWatermark : Unable to process image file : ' + err);
var retObj = _parseOptions(imageData, source, options);
im.convert(retObj.args, function(err, stdout) {
if (err)
console.log('Image-Watermark::embedWatermark : Error in applying watermark : ' + err);
else
console.log('Image-Watermark::embedWatermark : Successfully applied watermark. Please check it at :\n ' + retObj.outputPath);
});
});
}Object.keys(options.imageVersions).forEach(function (version) {
counter += 1;
var opts = options.imageVersions[version];
imageMagick.resize({
width: opts.width,
height: opts.height,
srcPath: options.uploadDir + '/' + fileInfo.name,
dstPath: options.uploadDir + '/' + version + '/' +
fileInfo.name
}, finish);
});
}Object.keys(options.imageVersions).forEach(function (version) {
counter += 1;
var opts = options.imageVersions[version];
imageMagick.resize({
width: opts.width,
height: opts.height,
srcPath: options.uploadDir + '/' + fileInfo.name,
dstPath: options.uploadDir + '/' + version + '/' +
fileInfo.name
}, finish);
});
}imagemagick
A wrapper around the imagemagick cli
