Efficient imposition of arbitrary postscript.RTM. files without preprocessing by defining a virtual device that specifies a desired position of a page on an output device while redefining postscript save and restore operators
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United States of America Patent
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Jan 5, 1999
Grant Date -
N/A
app pub date -
Apr 2, 1996
filing date -
Apr 2, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a method of imposing selected pages defined in a sequence of page descriptions included in a PostScript.RTM. file, the selected pages are interpreted by an interpreter and may be transmitted to a raster memory for rendering on a flat by an output device. If the current page is a selected page to be rendered on the flat, a virtual device is defined as the output device for the selected page such that the virtual device specifies an area in a raster memory for positioning the selected page on the flat, and the selected page is interpreted. If the current page is not a selected page, a next page is determined as a selected page to be rendered on the flat, the virtual device is defined for the next selected page as the output device for the non-selected page, and the non-selected page is interpreted. A PostScript.RTM. save operator is redefined in order to save a definition of the virtual device. A PostScript.RTM. restore operator is redefined in order to apply an accumulation of operations applied on the saved definition of the virtual device to a current virtual device.
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