This filter makes your image look like a slide, by adding a slide-film
like black frame, sprocket holes, and labels.
If necessary, the image will be cropped to fit into an aspect ratio of
width : height = 3:2. If image width is greater than image height,
black frames will be added at the top and the bottom of the image, else
the frames will be added on the left and right sides. You may select
the color as well as the font of the text appearing on the frames. The
current background color will be used for drawing the holes.
The script only works on RGB and grayscale images that contain one
layer. Otherwise the menu entry is insensitive and grayed out.
