Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1997-11-12
2000-02-08
Bayerl, Raymond J.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
345186, 345199, G09G 506
Patent
active
060232749
ABSTRACT:
To accommodate the fact that, not only may a window require a number of user-determined colors to display, for example, an image, the window may also need to display widgets forming a user interface within the window in distinctive user-defined colors, while still causing the minimum disturbance to other displayed windows in windowing display systems of the type having storage locations for storing a colormap which determines the colors displayed in the system corresponding to particular pixel values, and which generate a shared colormap by assigning screen colors to pixel values dynamically as the screen colors are required by tasks using the system, and allow at least some of the windows to have a private colormap which can be copied into the storage locations when the corresponding window is activated, a method of generating a private colormap for a window is disclosed characterised by: overwriting a first selected portion of the private colormap for the window with a user-determined colormap to leave a remainder of said private colormap unallocated; ascertaining a number of user-defined user interface colors required by said window; and overwriting a second selected portion of the private colormap with a portion of said shared colourmap to form a modified colormap, said portion of said shared colormap not being greater than said remainder less said number of user-defined user interface colors.
REFERENCES:
patent: 5430465 (1995-07-01), Sabella et al.
patent: 5629720 (1997-05-01), Cherry et al.
patent: 5703627 (1997-12-01), Young
Bayerl Raymond J.
Clay A. Bruce
International Business Machines Corp.
Thai Cuong T.
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