| /compass/005_compass/compass/node_modules/gm/lib/convenience/morph.js |
|---|
| @@ -0,0 +1,61 @@ |
|---|
| |
| /** |
| * Module dependencies. |
| */ |
| |
| var fs = require('fs'); |
| var parallel = require('array-parallel'); |
| |
| /** |
| * Extend proto. |
| */ |
| |
| module.exports = function (proto) { |
| |
| /** |
| * Do nothing. |
| */ |
| |
| function noop () {} |
| |
| // http://www.graphicsmagick.org/GraphicsMagick.html#details-morph |
| proto.morph = function morph (other, outname, callback) { |
| if (!outname) { |
| throw new Error("an output filename is required"); |
| } |
| |
| callback = (callback || noop).bind(this) |
| |
| var self = this; |
| |
| if (Array.isArray(other)) { |
| other.forEach(function (img) { |
| self.out(img); |
| }); |
| self.out("-morph", other.length); |
| } else { |
| self.out(other, "-morph", 1); |
| } |
| |
| self.write(outname, function (err, stdout, stderr, cmd) { |
| if (err) return callback(err, stdout, stderr, cmd); |
| |
| // Apparently some platforms create the following temporary files. |
| // Check if the output file exists, if it doesn't, then |
| // work with temporary files. |
| fs.exists(outname, function (exists) { |
| if (exists) return callback(null, stdout, stderr, cmd); |
| |
| parallel([ |
| fs.unlink.bind(fs, outname + '.0'), |
| fs.unlink.bind(fs, outname + '.2'), |
| fs.rename.bind(fs, outname + '.1', outname) |
| ], function (err) { |
| callback(err, stdout, stderr, cmd); |
| }) |
| }) |
| }); |
| |
| return self; |
| } |
| } |
