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, "author" : "Rasmus Andersson "
, "licenses" : ["MIT"]
, "repository" : { "type" : "git"
, "url" : "http://github.com/rsms/node-imagemagick.git" }
, "engine" : ["node >=0.6"]
, "main" : "imagemagick"
}
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package/README.md000666 �$Ԥ�o�-0000011606 12027415150012576 0ustar00000000 000000 # node-imagemagick
[Imagemagick](http://www.imagemagick.org/) module for [Node](http://nodejs.org/).
You can install this module using [npm](http://github.com/isaacs/npm):
npm install imagemagick
Requires imagemagick CLI tools to be installed. There are numerous ways to install them. For instance, if you're on OS X you can use [Homebrew](http://mxcl.github.com/homebrew/): `brew install imagemagick`.
## Example
```javascript
var im = require('imagemagick');
im.readMetadata('kittens.jpg', function(err, metadata){
if (err) throw err;
console.log('Shot at '+metadata.exif.dateTimeOriginal);
})
// -> Shot at Tue, 06 Feb 2007 21:13:54 GMT
```
## API
### convert.path
Path to the `convert` program. Defaults to `"convert"`.
### identify.path
Path to the `identify` program. Defaults to `"identify"`.
### identify(path, callback(err, features))
Identify file at `path` and return an object `features`.
Example:
```javascript
im.identify('kittens.jpg', function(err, features){
if (err) throw err;
console.log(features);
// { format: 'JPEG', width: 3904, height: 2622, depth: 8 }
});
```
### identify(args, callback(err, output))
Custom identification where `args` is an array of arguments. The result is returned as a raw string to `output`.
Example:
```javascript
im.identify(['-format', '%wx%h', 'kittens.jpg'], function(err, output){
if (err) throw err;
console.log('dimension: '+output);
// dimension: 3904x2622
});
```
### readMetadata(path, callback(err, metadata))
Read metadata (i.e. exif) in `path` and return an object `metadata`. Modelled on top of `identify`.
Example:
```javascript
im.readMetadata('kittens.jpg', function(err, metadata){
if (err) throw err;
console.log('Shot at '+metadata.exif.dateTimeOriginal);
// -> Shot at Tue, 06 Feb 2007 21:13:54 GMT
});
```
### convert(args, callback(err, stdout, stderr))
Raw interface to `convert` passing arguments in the array `args`.
Example:
```javascript
im.convert(['kittens.jpg', '-resize', '25x120', 'kittens-small.jpg'],
function(err, stdout){
if (err) throw err;
console.log('stdout:', stdout);
});
```
### resize(options, callback(err, stdout, stderr))
Convenience function for resizing an image, modelled on top of `convert`.
The `options` argument have the following default values:
```javascript
{
srcPath: undefined,
srcData: null,
srcFormat: null,
dstPath: undefined,
quality: 0.8,
format: 'jpg',
progressive: false,
width: 0,
height: 0,
strip: true,
filter: 'Lagrange',
sharpening: 0.2,
customArgs: []
}
```
srcPath, dstPath and (at least one of) width and height are required. The rest is optional.
Example:
```javascript
im.resize({
srcPath: 'kittens.jpg',
dstPath: 'kittens-small.jpg',
width: 256
}, function(err, stdout, stderr){
if (err) throw err;
console.log('resized kittens.jpg to fit within 256x256px');
});
```
Example with stdin/stdout:
```javascript
var fs = require('fs');
im.resize({
srcData: fs.readFileSync('kittens.jpg', 'binary'),
width: 256
}, function(err, stdout, stderr){
if (err) throw err
fs.writeFileSync('kittens-resized.jpg', stdout, 'binary');
console.log('resized kittens.jpg to fit within 256x256px')
});
```
### crop(options, callback) ###
Convenience function for resizing and cropping an image. _crop_ uses the resize method, so _options_ and _callback_ are the same. _crop_ uses _options.srcPath_, so make sure you set it :) Using only _options.width_ or _options.height_ will create a square dimensioned image. Gravity can also be specified, it defaults to Center. Available gravity options are [NorthWest, North, NorthEast, West, Center, East, SouthWest, South, SouthEast]
Example:
```javascript
im.crop({
srcPath: path,
dstPath: 'cropped.jpg',
width: 800,
height: 600,
quality: 1,
gravity: "North"
}, function(err, stdout, stderr){
// foo
});
```
## License (MIT)
Copyright (c) 2010-2012 Rasmus Andersson
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
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package/imagemagick.js000666 �$Ԥ�;o�-0000031100 12060041021014163 0ustar00000000 000000 var childproc = require('child_process'),
EventEmitter = require('events').EventEmitter;
function exec2(file, args /*, options, callback */) {
var options = { encoding: 'utf8'
, timeout: 0
, maxBuffer: 500*1024
, killSignal: 'SIGKILL'
, output: null
};
var callback = arguments[arguments.length-1];
if ('function' != typeof callback) callback = null;
if (typeof arguments[2] == 'object') {
var keys = Object.keys(options);
for (var i = 0; i < keys.length; i++) {
var k = keys[i];
if (arguments[2][k] !== undefined) options[k] = arguments[2][k];
}
}
var child = childproc.spawn(file, args);
var killed = false;
var timedOut = false;
var Wrapper = function(proc) {
this.proc = proc;
this.stderr = new Accumulator();
proc.emitter = new EventEmitter();
proc.on = proc.emitter.on.bind(proc.emitter);
this.out = proc.emitter.emit.bind(proc.emitter, 'data');
this.err = this.stderr.out.bind(this.stderr);
this.errCurrent = this.stderr.current.bind(this.stderr);
};
Wrapper.prototype.finish = function(err) {
this.proc.emitter.emit('end', err, this.errCurrent());
};
var Accumulator = function(cb) {
this.stdout = {contents: ""};
this.stderr = {contents: ""};
this.callback = cb;
var limitedWrite = function(stream) {
return function(chunk) {
stream.contents += chunk;
if (!killed && stream.contents.length > options.maxBuffer) {
child.kill(options.killSignal);
killed = true;
}
};
};
this.out = limitedWrite(this.stdout);
this.err = limitedWrite(this.stderr);
};
Accumulator.prototype.current = function() { return this.stdout.contents; };
Accumulator.prototype.errCurrent = function() { return this.stderr.contents; };
Accumulator.prototype.finish = function(err) { this.callback(err, this.stdout.contents, this.stderr.contents); };
var std = callback ? new Accumulator(callback) : new Wrapper(child);
var timeoutId;
if (options.timeout > 0) {
timeoutId = setTimeout(function () {
if (!killed) {
child.kill(options.killSignal);
timedOut = true;
killed = true;
timeoutId = null;
}
}, options.timeout);
}
child.stdout.setEncoding(options.encoding);
child.stderr.setEncoding(options.encoding);
child.stdout.addListener("data", function (chunk) { std.out(chunk, options.encoding); });
child.stderr.addListener("data", function (chunk) { std.err(chunk, options.encoding); });
var version = process.versions.node.split('.');
child.addListener(version[0] == 0 && version[1] < 7 ? "exit" : "close", function (code, signal) {
if (timeoutId) clearTimeout(timeoutId);
if (code === 0 && signal === null) {
std.finish(null);
} else {
var e = new Error("Command "+(timedOut ? "timed out" : "failed")+": " + std.errCurrent());
e.timedOut = timedOut;
e.killed = killed;
e.code = code;
e.signal = signal;
std.finish(e);
}
});
return child;
};
function parseIdentify(input) {
var lines = input.split("\n"),
prop = {},
props = [prop],
prevIndent = 0,
indents = [indent],
currentLine, comps, indent, i;
lines.shift(); //drop first line (Image: name.jpg)
for (i in lines) {
currentLine = lines[i];
indent = currentLine.search(/\S/);
if (indent >= 0) {
comps = currentLine.split(': ');
if (indent > prevIndent) indents.push(indent);
while (indent < prevIndent && props.length) {
indents.pop();
prop = props.pop();
prevIndent = indents[indents.length - 1];
}
if (comps.length < 2) {
props.push(prop);
prop = prop[currentLine.split(':')[0].trim().toLowerCase()] = {};
} else {
prop[comps[0].trim().toLowerCase()] = comps[1].trim()
}
prevIndent = indent;
}
}
return prop;
};
exports.identify = function(pathOrArgs, callback) {
var isCustom = Array.isArray(pathOrArgs),
isData,
args = isCustom ? ([]).concat(pathOrArgs) : ['-verbose', pathOrArgs];
if (typeof args[args.length-1] === 'object') {
isData = true;
pathOrArgs = args[args.length-1];
args[args.length-1] = '-';
if (!pathOrArgs.data)
throw new Error('first argument is missing the "data" member');
} else if (typeof pathOrArgs === 'function') {
args[args.length-1] = '-';
callback = pathOrArgs;
}
var proc = exec2(exports.identify.path, args, {timeout:120000}, function(err, stdout, stderr) {
var result, geometry;
if (!err) {
if (isCustom) {
result = stdout;
} else {
result = parseIdentify(stdout);
geometry = result['geometry'].split(/x/);
result.format = result.format.match(/\S*/)[0]
result.width = parseInt(geometry[0]);
result.height = parseInt(geometry[1]);
result.depth = parseInt(result.depth);
if (result.quality !== undefined) result.quality = parseInt(result.quality) / 100;
}
}
callback(err, result);
});
if (isData) {
if ('string' === typeof pathOrArgs.data) {
proc.stdin.setEncoding('binary');
proc.stdin.write(pathOrArgs.data, 'binary');
proc.stdin.end();
} else {
proc.stdin.end(pathOrArgs.data);
}
}
return proc;
}
exports.identify.path = 'identify';
function ExifDate(value) {
// YYYY:MM:DD HH:MM:SS -> Date(YYYY-MM-DD HH:MM:SS +0000)
value = value.split(/ /);
return new Date(value[0].replace(/:/g, '-')+' '+
value[1]+' +0000');
}
function exifKeyName(k) {
return k.replace(exifKeyName.RE, function(x){
if (x.length === 1) return x.toLowerCase();
else return x.substr(0,x.length-1).toLowerCase()+x.substr(x.length-1);
});
}
exifKeyName.RE = /^[A-Z]+/;
var exifFieldConverters = {
// Numbers
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,
// Dates
dateTime:ExifDate, dateTimeDigitized:ExifDate, dateTimeOriginal:ExifDate
};
exports.readMetadata = function(path, callback) {
return exports.identify(['-format', '%[EXIF:*]', path], function(err, stdout) {
var meta = {};
if (!err) {
stdout.split(/\n/).forEach(function(line){
var eq_p = line.indexOf('=');
if (eq_p === -1) return;
var key = line.substr(0, eq_p).replace('/','-'),
value = line.substr(eq_p+1).trim(),
typekey = 'default';
var p = key.indexOf(':');
if (p !== -1) {
typekey = key.substr(0, p);
key = key.substr(p+1);
if (typekey === 'exif') {
key = exifKeyName(key);
var converter = exifFieldConverters[key];
if (converter) value = converter(value);
}
}
if (!(typekey in meta)) meta[typekey] = {key:value};
else meta[typekey][key] = value;
})
}
callback(err, meta);
});
}
exports.convert = function(args, timeout, callback) {
var procopt = {encoding: 'binary'};
if (typeof timeout === 'function') {
callback = timeout;
timeout = 0;
} else if (typeof timeout !== 'number') {
timeout = 0;
}
if (timeout && (timeout = parseInt(timeout)) > 0 && !isNaN(timeout))
procopt.timeout = timeout;
return exec2(exports.convert.path, args, procopt, callback);
}
exports.convert.path = 'convert';
var resizeCall = function(t, callback) {
var proc = exports.convert(t.args, t.opt.timeout, callback);
if (t.opt.srcPath.match(/-$/)) {
if ('string' === typeof t.opt.srcData) {
proc.stdin.setEncoding('binary');
proc.stdin.write(t.opt.srcData, 'binary');
proc.stdin.end();
} else {
proc.stdin.end(t.opt.srcData);
}
}
return proc;
}
exports.resize = function(options, callback) {
var t = exports.resizeArgs(options);
return resizeCall(t, callback)
}
exports.crop = function (options, callback) {
if (typeof options !== 'object')
throw new TypeError('First argument must be an object');
if (!options.srcPath && !options.srcData)
throw new TypeError("No srcPath or data defined");
if (!options.height && !options.width)
throw new TypeError("No width or height defined");
if (options.srcPath){
var args = options.srcPath;
} else {
var args = {
data: options.srcData
};
}
exports.identify(args, function(err, meta) {
if (err) return callback && callback(err);
var t = exports.resizeArgs(options),
ignoreArg = false,
printNext = false,
args = [];
t.args.forEach(function (arg) {
if (printNext === true){
console.log("arg", arg);
printNext = false;
}
// ignoreArg is set when resize flag was found
if (!ignoreArg && (arg != '-resize'))
args.push(arg);
// found resize flag! ignore the next argument
if (arg == '-resize'){
console.log("resize arg");
ignoreArg = true;
printNext = true;
}
if (arg === "-crop"){
console.log("crop arg");
printNext = true;
}
// found the argument after the resize flag; ignore it and set crop options
if ((arg != "-resize") && ignoreArg) {
var dSrc = meta.width / meta.height,
dDst = t.opt.width / t.opt.height,
resizeTo = (dSrc < dDst) ? ''+t.opt.width+'x' : 'x'+t.opt.height,
dGravity = options.gravity ? options.gravity : "Center";
args = args.concat([
'-resize', resizeTo,
'-gravity', dGravity,
'-crop', ''+t.opt.width + 'x' + t.opt.height + '+0+0',
'+repage'
]);
ignoreArg = false;
}
})
t.args = args;
resizeCall(t, callback);
})
}
exports.resizeArgs = function(options) {
var opt = {
srcPath: null,
srcData: null,
srcFormat: null,
dstPath: null,
quality: 0.8,
format: 'jpg',
progressive: false,
colorspace: null,
width: 0,
height: 0,
strip: true,
filter: 'Lagrange',
sharpening: 0.2,
customArgs: [],
timeout: 0
}
// check options
if (typeof options !== 'object')
throw new Error('first argument must be an object');
for (var k in opt) if (k in options) opt[k] = options[k];
if (!opt.srcPath && !opt.srcData)
throw new Error('both srcPath and srcData are empty');
// normalize options
if (!opt.format) opt.format = 'jpg';
if (!opt.srcPath) {
opt.srcPath = (opt.srcFormat ? opt.srcFormat +':-' : '-'); // stdin
}
if (!opt.dstPath)
opt.dstPath = (opt.format ? opt.format+':-' : '-'); // stdout
if (opt.width === 0 && opt.height === 0)
throw new Error('both width and height can not be 0 (zero)');
// build args
var args = [opt.srcPath];
if (opt.sharpening > 0) {
args = args.concat([
'-set', 'option:filter:blur', String(1.0-opt.sharpening)]);
}
if (opt.filter) {
args.push('-filter');
args.push(opt.filter);
}
if (opt.strip) {
args.push('-strip');
}
if (opt.width || opt.height) {
args.push('-resize');
if (opt.height === 0) args.push(String(opt.width));
else if (opt.width === 0) args.push('x'+String(opt.height));
else args.push(String(opt.width)+'x'+String(opt.height));
}
opt.format = opt.format.toLowerCase();
var isJPEG = (opt.format === 'jpg' || opt.format === 'jpeg');
if (isJPEG && opt.progressive) {
args.push('-interlace');
args.push('plane');
}
if (isJPEG || opt.format === 'png') {
args.push('-quality');
args.push(Math.round(opt.quality * 100.0).toString());
}
else if (opt.format === 'miff' || opt.format === 'mif') {
args.push('-quality');
args.push(Math.round(opt.quality * 9.0).toString());
}
if (opt.colorspace) {
args.push('-colorspace');
args.push(opt.colorspace);
}
if (Array.isArray(opt.customArgs) && opt.customArgs.length)
args = args.concat(opt.customArgs);
args.push(opt.dstPath);
return {opt:opt, args:args};
}
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package/test-crop.js000666 �$Ԥ�o�-0000001617 12027411436013601 0ustar00000000 000000 var fs = require('fs'),
im = require('./imagemagick');
var path = __dirname+'/sample-images/blue-bottle-coffee.jpg';
(function () {
var opt, timeStarted = new Date;
im.crop(opt = {
srcPath: path,
dstPath: 'cropped.jpg',
width: 200,
height: 90,
quality: 1
}, function (err, stdout, stderr){
if (err) return console.error(err.stack || err);
console.log('crop(',opt,') ->', stdout);
console.log('Real time spent: '+(new Date() - timeStarted) + ' ms');
});
})();
(function () {
var opt, timeStarted = new Date;
im.crop(opt = {
srcPath: path,
dstPath: 'cropped2.jpg',
width: 200,
height: 90,
gravity: "North",
quality: 1
}, function (err, stdout, stderr){
if (err) return console.error(err.stack || err);
console.log('crop(',opt,') ->', stdout);
console.log('Real time spent: '+(new Date() - timeStarted) + ' ms');
});
})();
PaxHeader/package/test.js000666 �H$Ԥ�Io�-0000001412 12027412315015020 xustar00000000 000000 19 NODETAR.depth=1
24 NODETAR.follow=false
36 NODETAR.ignoreFiles.0=.npmignore
36 NODETAR.ignoreFiles.1=.gitignore
38 NODETAR.ignoreFiles.2=package.json
36 NODETAR.package.name=imagemagick
68 NODETAR.package.description=A wrapper around the imagemagick cli
33 NODETAR.package.version=0.1.3
61 NODETAR.package.author=Rasmus Andersson
34 NODETAR.package.licenses.0=MIT
39 NODETAR.package.repository.type=git
78 NODETAR.package.repository.url=http://github.com/rsms/node-imagemagick.git
39 NODETAR.package.engine.0=node >=0.6
36 NODETAR.package.main=imagemagick
24 path=package/test.js
21 NODETAR.type=File
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18 SCHILY.nlink=1
17 uid=617915629
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24 NODETAR.blksize=4096
20 NODETAR.blocks=8
package/test.js000666 �$Ԥ�o�-0000003254 12027412315012634 0ustar00000000 000000 var fs = require('fs'),
im = require('./imagemagick');
var path = __dirname+'/sample-images/blue-bottle-coffee.jpg';
var imdata = fs.readFileSync(path, 'binary');
im.identify(path, function (err, features){
if (err) return console.error(err.stack || err);
console.log('identify(path) ->', features);
})
im.identify({data:imdata}, function (err, features){
if (err) return console.error(err.stack || err);
console.log('identify({data:imdata}) ->', features);
})
im.readMetadata(path, function (err, metadata){
if (err) return console.error(err.stack || err);
console.log('readMetadata(path) ->', metadata);
})
im.readMetadata({data:imdata}, function (err, metadata){
if (err) return console.error(err.stack || err);
console.log('readMetadata({data:imdata} ->', metadata);
})
var timeStarted = new Date;
im.resize({
srcPath: path,
dstPath: 'test-resized.jpg',
width: 256
}, function (err, stdout, stderr){
if (err) return console.error(err.stack || err);
console.log('resize(...) wrote "test-resized.jpg"');
console.log('real time taken for convert: '+((new Date)-timeStarted)+' ms');
im.identify(['-format', '%b', 'test-resized.jpg'], function (err, r){
if (err) throw err;
console.log("identify(['-format', '%b', 'test-resized.jpg']) ->", r);
})
})
timeStarted = new Date;
im.resize({
srcData: imdata,
width: 256
}, function (err, stdout, stderr){
if (err) return console.error(err.stack || err);
console.log('real time taken for convert (with buffers): '+
((new Date)-timeStarted)+' ms');
fs.writeFileSync('test-resized-io.jpg', stdout, 'binary');
console.log('resize(...) wrote "test-resized.jpg" ('+stdout.length+' Bytes)');
})