Frontend samples

1. Modify image and storing it on the server
A proof of concept that does the following:

1. Loads an image into a canvas.
2. Modify the image.
3. Load the canvas content into an img element.
4. Saves the canvas as an image serverside.

2. Drag & drop image upload sample with dropzone
Places 2 dropzones on the page and handles the upload with dropzone.php.