US 8,542,253 B2 · Magnification engine

Abstract

An improved graphics processing system and method are described for magnifying visual output information for printing, display, or other output. A graphics engine transforms display information so as to magnify one or more components or areas of an output image for display via output hardware such as a screen or printer. Magnification parameters are supplied to the graphics engine by one or more magnification applications. In an embodiment of the invention, the graphics engine performs compositing of magnified and unmagnified content for display. In an alternative embodiment, the graphics engine outputs corresponding scaled image material to the appropriate magnification application for rendering. In a further embodiment, the graphics engine may operate in both modes. The magnified output according to various embodiments of the invention enhances the accessibility of the computer system for visually handicapped or impaired users by providing high quality magnification and increased system and application stability.

Claims20

Dependent claims

A computer-readable storage medium having a set of instructions which when executed provides a method of scaling and displaying a selected portion of a graphical display via an output display device, the method executed by the set of instructions comprising:

receiving a set of magnification parameters comprising a source identification parameter and a target identification parameter;
determining a position of a cursor;
associating the source identification parameter with the position of the cursor;
associating the target identification parameter with a portion of the output display surrounding the position of the cursor;
and
transmitting to a graphics engine in a display path of the output display device information corresponding to the magnification parameters.

3 more elements

A method of scaling and displaying a selected portion of a graphical display via an output display device, the method comprising:

receiving via a user interface of a set of magnification parameters comprising a source identification parameter and a target identification parameter;
determining a position of a cursor;
correlating the source identification parameter with the position of the cursor;
and
transmitting to a graphics engine in a display path of the output display device information corresponding to the magnification parameters, wherein the graphics engine comprises:
a component scaler for scaling a source area specified by the source identification parameter to create the scaled portion in accordance with the magnification parameters, and
an image compositor for combining the graphical display and the scaled portion, wherein the graphics engine scales the selected portion of the graphical display and causes the scaled selected portion to be rendered via the output display device in a specified target area of the graphical display associated with the output display device, the specified target area being identified by the target identification parameter.

4 more elements

A system for scaling and displaying a selected portion of a graphical display via an output display device, the system comprising:

a memory storage;
and
a processing unit coupled to the memory storage, the processing unit being configured to:
receive a set of magnification parameters comprising a source identification parameter and a target identification parameter,
determine a position of a cursor,
associate the source identification parameter with the position of the cursor,
associate the target identification parameter with a first portion of the output display surrounding the position of the cursor,
detect a relocation of the position of the cursor,
update, in response to the relocation, the association of the source identification parameter with the relocated position of the cursor,
update, in response to the relocation, the association of the target identification parameter with a second portion of the output display surrounding the relocated position of the cursor, and
transmit to a graphics engine in a display path of the output display device information corresponding to the magnification parameters, wherein the graphics engine comprises:
a component scaler for scaling a source area specified by the source identification parameter to create the scaled portion in accordance with the magnification parameters, and
an image compositor for combining the graphical display and the scaled portion, wherein the graphics engine scales the selected portion of the graphical display and causes the scaled selected portion to be rendered via the output display device in a specified target area of the graphical display associated with the output display device, the specified target area being identified by the target identification parameter.

10 more elements

Dependencies are inferred from the claim text.

Magnification engine

Life of this patent

Magnification engine

Life of this patent

Abstract

Claims20