Taligent, Inc.

Object Licensing Corporation

Maire L Howard

Debra L Orton

Richard D Webb

John W Peterson

Rajiv Jain

Donald M Marsh

Robert Seidl

Arthur W Cabral

A view system provides support for applying matrix operations to one or more views to render a view in a more realistic manner. The matrix operations are applied in accordance with a predefined coordinate system for each application to generate the screen information for each application program. The view system applies the matrix operations to generate views appearing on the display, off the display and partially on and partially off the display. Furthermore, the system enables hierarchical linkage of views to enhance the correspondence between a view undergoing a transformation and proximal views.

Object-oriented view coordinate space system

A method and system for caching graphic information for display in a graphics processing system to avoid repeated rendering each time a graphic is required to be re drawn. A developer of an application program can specify which graphic objects should be cached, and request that caching be carried out for those graphics. Devices may also specify whether caching is desired, and this preference may be overridden by the caching system. The caching system may create a single cache object for several devices, or may create several cache objects for corresponding devices, depending on the characteristics of the devices. The objects are cached in a device-dependent manner. The cached graphic may be sent to methods and devices in the same mariner that any other graphic is sent.

Rendering cache in an object oriented system

A view system is provided for each application program in a computer system in order to display application-generated information on a display. To increase graphic speed, the view system transfers graphic information directly into the screen buffer into a screen buffer area defined by a visible area definition. Since the view system creates a view defined by the visible area definition, the view can be made non-rectilinear by providing a suitable definition. The visible area definition may define a visible area of any arbitrary two-dimensional shape, including, but not limited to, rectilinear, disjoint, elliptical, etc. This mechanism makes it possible to provide a single drawing canvas comprised of non-contiguous areas and enhances traditionally rectangular window systems because it allows windows to have any arbitrary two-dimensional shape.

Object-oriented non-rectilinear viewing framework

An object-oriented graphic system is disclosed including a processor with an attached display, storage and object-oriented operating system. The graphic system builds a component object in the storage of the processor for managing graphic processing. The processor includes an object for connecting one or more graphic devices to various objects responsible for tasks such as graphic accelerators, frame buffers, page description languages and vector engines. The system is fully extensible and includes polymorphic processing built into each of the support objects.

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San Jose, CA, United States of America

Maire L Howard