Browse Prior Art Database

Using PostScript Resources in Advanced Function Printing

IP.com Disclosure Number: IPCOM000114666D
Original Publication Date: 1995-Jan-01
Included in the Prior Art Database: 2005-Mar-29
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Palmer, DR: AUTHOR

Abstract

Disclosed is an extension to IBM*'s Advanced Function Printing (AFP) architecture that incorporates some of the advantages of PostScript** into AFP. The method defines a new AFP entity, the "AFP PostScript Resource", that contains within it PostScript commands describing color, image halftoning or fonts. The new AFP entity also associates the described resource with an identifying number or name, which can then be referenced by traditional AFP objects such as text, image, area, and bar code. The associated resource then applies to the traditional AFP object; for example, AFP text color can be defined by PostScript color commands.

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Using PostScript Resources in Advanced Function Printing

      Disclosed is an extension to IBM*'s Advanced Function Printing
(AFP) architecture that incorporates some of the advantages of
PostScript** into AFP.  The method defines a new AFP entity, the "AFP
PostScript Resource", that contains within it PostScript commands
describing color, image halftoning or fonts.  The new AFP entity also
associates the described resource with an identifying number or name,
which can then be referenced by traditional AFP objects such as text,
image, area, and bar code.  The associated resource then applies to
the traditional AFP object; for example, AFP text color can be
defined by PostScript color commands.

An AFP Color PostScript Resource Specification contains:
  1.  a local color ID
  2.  PostScript "setcolorspace", "setcolor", and "setcolorrendering"
       operators and associated data as needed to specify the desired
       color.

      The remainder of the AFP document would use the local color ID
just as it always has: to define color for text, bar code,
significant bits of binary image, etc.  The difference is that the
color specified is from the rich set of possible PostScript colors,
not just from the set of eight named colors.

An AFP Image PostScript Resource Specification contains:
  1.  a local ID
  2.  PostScript "sethalftone", "setscreen", and "setcolorscreens"
       operators and associated data as needed to specify the desired
       halftoning characteristics.

      The local ID would be specified in IOCA gray-scale image
objects to define the halftoning algorithm according to PostScript's
flexible rules.  This allows specification of line screen, dot
screen, screen angle and frequency, as well as th...