Cursor controlled page selection in a video display
Method of editing graphic objects in an interactive draw graphic system using implicit editing actions
Bitmapped graphics workstation
Graphics data processing apparatus having image operations with transparent color having a selectable number of bits
Video compositing using a software linear keyer
Method and apparatus for removable menu window
Video overlay image processing apparatus
Weighted mapping of color value information onto a display screen
Half toning pixel processor Patent #: 5016191
ApplicationNo. 720881 filed on 06/25/1991
US Classes:715/729, For a visually challenged user345/902, MENU DISPLAY715/810, Menu or selectable iconic array (e.g., palette)715/856Cursor
ExaminersPrimary: Oberley, Alvin E.
Assistant: Saras, Steven
Attorney, Agent or Firm
International ClassG09G 005/14
AbstractA computer display control system displays semi-transparent control menus superimposed over other images. The computer system has a central processing unit, a program memory that stores an application or operating system program that generates and displays a first set of images on the display, and a menu generating program that displays a control menu having a list of menu items. The displayed control menu is a stippled image that is partially transparent. When the control menu is superimposed over the first set of images, the first set of images remains visible on the display below the control menu. The menu generating program logically ANDs predefined control menu images with a halftone screen so as to generate a stippled control menu image comprising an array of interleaved transparent and non-transparent pixels. In the preferred embodiment, the menu generating program displays a first version of the control menu when the control menu is unselected and a second version when said control menu is selected. The first version has a higher percentage of transparent pixels than the second version, making the control menu less intrusive during normal use when the menu is unselected, and also making the control menu easier to see distinctly when it is selected.