How to post a picture in my phone with Feed Dialog

How to post a picture in my phone with Feed Dialog

When you post picture with feed dialog you put the url at the picture
value https://developers.facebook.com/docs/concepts/feed/ like here
But how can you post a picture that is in your phone?
Do I have to upload the picture to my album first??
If I have to, how can I upload the picture to my album in facebook?