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System for imaging complex graphical images
| Details |
Inventors: deSilva, Mahi;
Assignee: Object Technology Licensing Corporation (Cupertino, CA)
Primary Examiner: Rogers; Scott
Assistant Examiner: Garcia; Gabriel I.
Attorney, Agent or Firm: Kudirka & Jobse, Ward; James A.
An imaging system that provides a facility for converting highly functional complex graphical primitives that cannot be directly imaged by a less functional page description languages (PDL) such as PostScript or PCL into a plurality of less complex graphical primitives that can be directly imaged by a PDL. Some of these highly functional complex objects are three dimensional objects, high order curves, non regular areas, sampled three dimensional surfaces, off-centered pens, color blending and user programmable three dimensional shaders. These graphical objects are examined by a device handler, the characteristics of the object compared with the capabilities of the PDL of the device and if required the graphical object is transformed into a plurality of simpler objects that can be imaged by the PDL. Depending on the complexity of the graphical primitive, this transformation either creates a pixelmap of the image that is sent to the device at the device's resolution, or the transformation creates a plurality of graphic primitives supported by the device's PDL. Regardless, the desired complex image is printed, and the developer of an application program is able to utilize complex graphical primitives to develop an image that will be presented on a device irrespective of the limitations inherent in the device's actual PDL. |
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DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS The invention is preferably practiced in the context of an operating system resident on a personal computer such as the IBM PS/2, or Apple, Macintosh, computer.
A representative hardware environment is depicted in FIG.
3, which illustrates a typical hardware configuration of a computer 300 in accordance with the subject invention.
The computer 300 is controlled by a central processing unit 302, which may be a conventional microprocessor; a number of other units, all interconnected via a system bus 308, are provided to accomplish specific tasks.
Although a particular computer may only have some of the units illustrated in FIG.
3 or may have additional components not shown, most computers will include at least the units shown.
Specifically, computer 300 shown in FIG.
3 includes a random access memory (RAM) 306 for temporary storage of information, a read only memory (ROM) 304 for permanent storage of the computer's configuration and basic operating commands and an input/output (I/O) adapter 310 for connecting peripheral devices such as a disk unit 313 and printer 314 to the bus 308, via cables 315 and 312, respectively.
The function provided by cables 315 and 312 may be implemented via a network connection.
A user interface adapter 316 is also provided for connecting input devices, such as a keyboard 320, and other known interface devices including mice, speakers and microphones to the bus 308.
Visual output is provided by a display adapter 318 which connects the bus 308 to a display device 322 such as a video monitor.
The workstation has resident thereon and is controlled and coordinated by operating system software such as the Apple System/7, operating system.
In a preferred embodiment, the invention is implemented in the C++ programming language using object-oriented programming techniques.
C++ is a compiled language, that is, programs are written in a human-readable script and this script is then provided to another program called a compiler which generates a machine-readable numeric code that can be loaded into, and directly executed by, a computer
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