node-ghostscript.js

var exec = require('child_process').exec;
var create = function () {
    return new gs();
};
var gs = function () {
    this.options = [];
    this._input = null;
};
gs.prototype.batch = function () {
    this.options.push('-dBATCH');
    return this;
};
gs.prototype.device = function (device) {
    device = device || 'jpeg';
    this.options.push('-sDEVICE=' + device);
    return this;
};
gs.prototype.exec = function (callback) {
    var self = this;
    if (!this._input) return callback("Please specify input");
    var args = this.options.concat([this._input]).join(' ');
    exec('gs ' + args, function (err, stdout, stderr) {
        callback(err, stdout, stderr);
    });
};
gs.prototype.input = function (file) {
    this._input = file;
    return this;
};
gs.prototype.nopause = function () {
    this.options.push('-dNOPAUSE');
    return this;
};
gs.prototype.output = function (file) {
    file = file || '-';
    this.options.push('-sOutputFile=' + file);
    if (file === '-') return this.quiet();
    return this;
};
gs.prototype.q = gs.prototype.quiet;
gs.prototype.quiet = function () {
    this.options.push('-dQUIET');
    return this;
};
gs.prototype.firstPage = function (firstPage) {
    this.options.push('-dFirstPage=' + firstPage);
    return this;
};
gs.prototype.lastPage = function (lastPage) {
    this.options.push('-dLastPage=' + lastPage);
    return this;
};
gs.prototype.option = function (option) {
    this.options.push(option);
    return this;
};
gs.prototype.resolution = function (xres, yres) {
    this.options.push('-r' + xres + (yres ? 'x' + yres : ''));
    return this;
};
gs.prototype.r = gs.prototype.res = gs.prototype.resolution;
module.exports = create;