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| 'use strict';
var fs = require('fs'),
Jimp = require('jimp'),
async = require('async'),
plugins = require('./plugins');
var image = {};
image.resizeImage = function(data, callback) {
if (plugins.hasListeners('filter:image.resize')) {
plugins.fireHook('filter:image.resize', {
path: data.path,
target: data.target,
extension: data.extension,
width: data.width,
height: data.height
}, function(err) {
callback(err);
});
} else {
new Jimp(data.path, function(err, image) {
if (err) {
return callback(err);
}
var w = image.bitmap.width,
h = image.bitmap.height,
origRatio = w/h,
desiredRatio = data.width && data.height ? data.width/data.height : origRatio,
x = 0,
y = 0,
crop;
if (origRatio !== desiredRatio) {
if (desiredRatio > origRatio) {
desiredRatio = 1/desiredRatio;
}
if (origRatio >= 1) {
y = 0; // height is the smaller dimension here
x = Math.floor((w/2) - (h * desiredRatio / 2));
crop = async.apply(image.crop.bind(image), x, y, h * desiredRatio, h);
} else {
x = 0; // width is the smaller dimension here
y = Math.floor(h/2 - (w * desiredRatio / 2));
crop = async.apply(image.crop.bind(image), x, y, w, w * desiredRatio);
}
} else {
// Simple resize given either width, height, or both
crop = async.apply(setImmediate);
}
async.waterfall([
crop,
function(_image, next) {
if (typeof _image === 'function' && !next) {
next = _image;
_image = image;
}
if ((data.width && data.height) || (w > data.width) || (h > data.height)) {
_image.resize(data.width || Jimp.AUTO, data.height || Jimp.AUTO, next);
} else {
next(null, image);
}
},
function(image, next) {
image.write(data.target || data.path, next);
}
], function(err) {
callback(err);
});
});
}
};
image.normalise = function(path, extension, callback) {
if (plugins.hasListeners('filter:image.normalise')) {
plugins.fireHook('filter:image.normalise', {
path: path,
extension: extension
}, function(err) {
callback(err);
});
} else {
new Jimp(path, function(err, image) {
if (err) {
return callback(err);
}
image.write(path + '.png', function(err) {
callback(err);
});
});
}
};
image.load = function(path, callback) {
new Jimp(path, function(err, data) {
callback(err, data ? data.bitmap : null);
});
};
image.convertImageToBase64 = function(path, callback) {
fs.readFile(path, function(err, data) {
callback(err, data ? data.toString('base64') : null);
});
};
module.exports = image;
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