Function: PSPDRV Purpose: The PostScriptPortrait graphics driver for the GIPSY plot system. Category: GRAPHICS File: pgdriv.src Author: K.G. Begeman Use: CALL PSPDRV( IDEV , Input/Output INTEGER IFUNC , Input INTEGER RBUF , Input/Output REAL ARRAY NBUF , Input/Output INTEGER CHR , Input/Output CHARACTER*(*) LCHR ) Input/Output INTEGER IDEV Device identifier. IFUNC Operation code which specifies what operation the device handler is to perform. (see the programmers guide.) RBUF Floating-point array used to pass numerical data to or from the device handler. NBUF Indicates how many elements of RBUF are used. CHR Used to pass character data to or from the device handler. LCHR Indicates how many characters are used. Updates: Feb 1, 1991: KGB Document created. Oct 27, 1998: JPT Invent unique filenames for plot. Nov 12, 1998: JPT Implemented opcodes 26 and 29. Apr 27, 2000: JPT PostScript level 2; implemented image interpolation and ASCII85 encoding. May 18, 2000: JPT Interpolation algorithm in PostScript. Jun 21, 2002: JPT Improved PostScript interpolation.