Scrolling is often carried out on a computer by the CPU ( software scrolling) or by a graphics processor.
When frame rate is a limiting factor, one smooth scrolling technique is to blur images during movement that would otherwise appear to 'jump'.Ĭomputing Implementation It is related to scrolling in that changes to text and image position can only happen as often as the image can be redisplayed. Frame rate is the speed at which an entire image is redisplayed. Scrolling may take place in discrete increments (perhaps one or a few lines of text at a time), or continuously ( smooth scrolling). Scrolling may take place completely without user intervention (as in film credits) or, on an interactive device, be triggered by touchscreen or a keypress and continue without further intervention until a further user action, or be entirely controlled by input devices. A common television and movie special effect is to scroll credits, while leaving the background stationary. 'Scrolling,' as such, does not change the layout of the text or pictures but moves ( pans or tilts) the user's view across what is apparently a larger image that is not wholly seen. In computer displays, filmmaking, television production, and other kinetic displays, scrolling is sliding text, images or video across a monitor or display, vertically or horizontally.
