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EP0349455A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for controlling the presentation of nested overlays

Assignee: International Business Machines Corp
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Filing: 1989-05-23
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Granted: —
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Expires: 2009-05-23
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Abstract

Abstract A method is disclosed for controlling the presentation of nested overlays on a display medium. An overlay function resource is provided which includes its own environment specification which is independent of the space and data environment specifications. Mixing attributes are associated with each overlay and are utilized to determine which overlay space and data are to take precedence and be visible when the overlayed spaces are combined and imaged on a display medium. In a preferred mode of the present invention, the foreground and background of each overlay are separately controlled by the mixing attributes which define the mixing rules for the layered presentation of multiple overlays. Additionally, the order of precedence for displaying multiple overlays may be selectively altered or varied to provide multiple displays and to permit an individual overlay to be repetitively utilized.

Inventors

  • 👤 Barbara Ann Barker
  • 👤 Thomas R. Edel
  • 👤 Jeffrey A. Stark

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 09:02
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/22; G09G5/30; G09G5/14

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 82 words
A method of controlling the presentation of a plurality of nested overlays on a display medium, said method comprising the steps of: defining at least one selected area within said display medium; assigning mixing attributes to those portions of each of said plurality of nested overlays which are present in said at least one selected area; and combining those portions of each of said plurality of nested overlays within said at least one selected area in accordance with said assigned mixing attributes.
Claim 2
Independent Claim 82 words
A method of controlling the presentation of a plurality of nested overlays on a display medium, said method comprising the steps of: defining at least one selected area within said display medium; assigning mixing attributes to those portions of each of said plurality of nested overlays which are present in said at least one selected area; and combining those portions of each of said plurality of nested overlays within said at least one selected area in accordance with said assigned mixing attributes.
Claim 3
Dependent Claim 20 words
The method according to Claim 1 further including the step of: presenting the resultant composite presentation on said display medium.
Claim 4
Dependent Claim 21 words
The method according to Claim 1 further including the step of selectively altering the order of said plurality of nested overlays.
Claim 5
Dependent Claim 45 words
The method according to Claim 1 wherein said step of assigning mixing attributes to those portions of each of said plurality of nested overlays which are present in said at least one selected area comprises specifying a visual characteristic of the background of each portion.
Claim 6
Dependent Claim 45 words
The method according to Claim 3 wherein said step of specifying a visual characteristic of the background of each portion of each of said plurality of nested overlays which are present in said at least one selected area comprises causing said background to become transparent.
Claim 7
Dependent Claim 45 words
The method according to Claim 3 wherein said step of specifying a visual characteristic of the background of each portion of each of said plurality of nested overlays which are present in said at least one selected area comprises causing said background to become opaque.
Claim 8
Dependent Claim 45 words
The method according to Claim 1 wherein said step of assigning mixing attributes to those portions of each of said plurality of nested overlays which are present in said at least one selected area comprises specifying a visual characteristic of the foreground of each portion.

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