| /compass/005_compass/compass/node_modules/gm/lib/convenience/autoOrient.js |
|---|
| @@ -0,0 +1,57 @@ |
|---|
| |
| /** |
| * Extend proto. |
| */ |
| |
| module.exports = function (proto) { |
| |
| var exifTransforms = { |
| topleft: '' |
| , topright: ['-flop'] |
| , bottomright: ['-rotate', 180] |
| , bottomleft: ['-flip'] |
| , lefttop: ['-flip', '-rotate', 90] |
| , righttop: ['-rotate', 90] |
| , rightbottom: ['-flop', '-rotate', 90] |
| , leftbottom: ['-rotate', 270] |
| } |
| |
| proto.autoOrient = function autoOrient () { |
| // Always strip EXIF data since we can't |
| // change/edit it. |
| |
| // imagemagick has a native -auto-orient option |
| // so does graphicsmagick, but in 1.3.18. |
| // nativeAutoOrient option enables this if you know you have >= 1.3.18 |
| if (this._options.nativeAutoOrient || this._options.imageMagick) { |
| this.out('-auto-orient'); |
| this.strip(); |
| return this; |
| } |
| |
| this.preprocessor(function (callback) { |
| this.orientation({bufferStream: true}, function (err, orientation) { |
| if (err) return callback(err); |
| |
| var transforms = exifTransforms[orientation.toLowerCase()]; |
| if (transforms) { |
| |
| // remove any existing transforms that might conflict |
| var index = this._out.indexOf(transforms[0]); |
| if (~index) { |
| this._out.splice(index, transforms.length); |
| } |
| |
| // repage to fix coordinates |
| this._out.unshift.apply(this._out, transforms.concat('-page', '+0+0')); |
| } |
| |
| this.strip(); |
| |
| callback(); |
| }); |
| }); |
| |
| return this; |
| } |
| } |
