Taligent, Inc.

Obejct Technology Licensing Corporation

Richard D Webb

Arthur W Cabral

Maire L Howard

John W Peterson

Debra L Orton

Ryoji Watanabe

Rajiv Jain

Robert Seidl

A method and system for graphic state processing in which a graphic state object separate from a graphic contains state information. The state object can be accessed during times other than drawing. The object is comprised of sub-states which represent particular graphic processing states. A graphic need only send the graphic hierarchy, and the graphic state object automatically takes care of the sending of the graphic states to the rendering device. The graphic state object is an entity separate from the graphic which is to be drawn.

Graphic state processing

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 performs a scan conversion process on a geometric figure with edges. The figure is represented by a graphic object which contains data describing the edges and a method for traversing the edges to outline the figure. The scan conversion is performed by loading the graphic object into a memory and using the graphic object data and methods to generate a plurality of edge objects, each of which represents one of the edges. The edge objects are then manipulated by means of an edge engine object to generate a plurality of scan lines of varying numbers of pixels which scan lines together fill or frame the geometric figure and complete the scan conversion. The geometric figure can be displayed by displaying the pixels in the scan lines.

Object-oriented apparatus and method for scan line conversion of graphic

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.

Object-oriented graphic system

A method and system for processing graphic objects on a computer with a memory and an attached display and performing binary constructive area geometry (CAG) operations on area-defining geometries such as rectangle, ellipses, and polygons in an object oriented operating system. The operations include the construction of an area and the display of area geometries on an external device. The system allows application programmers to efficiently develop and share software for displaying a plurality of complex views including overlapping views and translucent views.

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Sunnyvale, CA, United States of America

Richard D Webb