Place one or multiple stamps on scanned pages in defined locations.
A stamp is understood here as
- a transparent text in a transparent frame with no borders
- an opaque text on an opaque background with no borders.
Stamp parameters:
- text
- font
- foreground colour
- background colour
- angle of rotation
- transparency.
Locations:
- centre
- cardinal directions
- inter-cardinal directions.
A v4l device may become unusable after the first capture (its child source
item may have been faked by libinsane if it had none).
Real scanners sustain both situations so far, i.e., whether the child source
is explicitly closed or not.
