Autorotate leaves original EXIF intact, so clients rotate image again

[Richtermeister]

In my apps I have to use the auto-rotate filter followed by the strip filter to prevent browsers from rotating the image again. I understand we don't want to strip all meta data by default, but after rotating the image, we should probably at least update its orientation attributes.

[wasinger]

If the engine is Imagick, resetting the orientation after rotating the image is easy:

if ($image instanceof \Imagine\Imagick\Image) {
  $image->getImagick()->setImageOrientation(1);
} 

But how about the other adapters? Gmagick doesn't have a "setImageOrientation" function, so we need to use an exif writer, but we only have a metadata reader. Any ideas?