Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1996-11-19
1998-11-24
Ba, Huynh
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
345346, 707103, 707515, G06F 1500
Patent
active
058414347
ABSTRACT:
A separate window is provided for each of multiple OpenDoc Canvas objects, thereby effecting a multiple Canvas-per-compound document design. Possibility of one OpenDoc object drawing in another object's screen area is eliminated by clipping imposed by the graphics engine on a per-window basis. Multiple different rendering libraries may be employed for screen imaging. The raw window may be used for direct platform-specific drawing functions and other rendering toolkits. User interface elements associated with alternative graphical user interfaces may be used as the root of a window hierarchy. A PlatformCanvas represents a handle to platform-dependent data types which are passed directly to native drawing routines and which provides a generic entity for specifically handling platform-specific architectures, providing a generic representation of platform-specific structures.
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patent: 5408602 (1995-04-01), Giokas et al.
patent: 5446842 (1995-08-01), Schaeffer et al.
Apple Computer Inc., "OPENDOC Programmer's Guide for the MacOS", 1995, pp. 35-37, 101, 104-105, 129, 131-133, 492-493.
Arda Sreedhar Reddy
Wiese Todd Michael
Williamson Leigh Allen
Ba Huynh
Carwell Robert M.
International Business Machines - Corporation
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