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|
C*LJDRIV -- PGPLOT Hewlett Packard LaserJet driver
C+
SUBROUTINE LJDRIV (IFUNC, RBUF, NBUF, CHR, LCHR)
INTEGER IFUNC, NBUF, LCHR
REAL RBUF(*)
CHARACTER*(*) CHR
C
C PGPLOT driver for Hewlett packard Laserjet device.
C
C Version 1.0 - 1989 Apr 09 - S. C. Allendorf
C Combined all drivers into one driver that
C uses a logical name to choose the format.
C TJP 1997-Jul-24: replaced ENCODE with WRITE, but still VMS-specific.
C=======================================================================
C
C Supported device: Hewlett Packard LaserJet, LaserJet+, or LaserJet II.
C
C Device type code: /LJnn where nn is a number 1 - NDEV inclusive.
C
C Default device name: PGPLOT.LJPLT.
C
C Default view surface dimensions: Depends on which version of the driver
C is chosen via the logical name PGPLOT_LJ_MODE.
C
C Driver Equivalence Size (H x V)
C ------ ----------- ---------------------
C LJ01 LHOR 10.50 by 8.00 inches
C LJ02 PHOR 8.00 by 10.50 inches
C LJ03 PHOT 8.00 by 10.50 inches
C LJ04 LHBR 6.54 by 4.91 inches
C LJ05 PHBS 5.65 by 5.65 inches
C LJ06 LMBR 10.50 by 8.00 inches
C LJ07 PMBR 8.00 by 10.50 inches
C LJ08 PMBS 4.48 by 4.48 inches
C LJ09 PLBS 6.00 by 6.00 inches
C
C Resolution: Depends on which version of the driver is chosen via the
C logical name PGPLOT_LJ_MODE.
C
C Driver Equivalence Resolution
C ------ ----------- ----------
C LJ01 LHOR 300 DPI
C LJ02 PHOR 300 DPI
C LJ03 PHOT 300 DPI
C LJ04 LHBR 300 DPI
C LJ05 PHBS 300 DPI
C LJ06 LMBR 150 DPI
C LJ07 PMBR 150 DPI
C LJ08 PMBS 150 DPI
C LJ09 PLBS 100 DPI
C
C Color capability: Color indices 0 (erase, white) and 1 (black) are
C supported. It is not possible to change color representation.
C
C Input capability: None.
C
C File format: See the LaserJet Printer Technical Reference Manual for
C details of the file format.
C
C Obtaining hardcopy: Use the command PRINT/PASSALL.
C-----------------------------------------------------------------------
C
C To choose one of the specific LaserJet drivers, you must execute a DCL
C command of the following form before executing your program:
C
C $ DEFINE PGPLOT_LJ_MODE LJnn
C
C where nn is a number 1 - NDEV inclusive. You may also use one of the
C equivalent names listed above. These equivalent names are an attempt
C to make the driver names make sense. They are decoded as follows:
C
C 1st character: P for protrait orientation or
C L for landscape orientation.
C 2nd character: H for high resolution (300 dpi) or
C M for medium resolution (150 dpi) or
C L for low resolution (100 dpi).
C 3rd character: B for a straight bitmap dump (subroutine GRLJ01) or
C O for an optimized bitmap dump (subroutine GRLJ02).
C 4th character: R for a rectangular view surface or
C S for a square view surface.
C
C A few notes are in order. First, not all of the possible combinations
C above are supported (currently). The driver that goes by the name of
C PHOT is a driver that puts out bitmaps suitable for inclusion in TeX
C output if you are using the Arbortext DVIHP program. The only drivers
C that will work with unexpanded LaserJet are LJ08 and LJ09. The other
C seven drivers require a LaserJet Plus or LaserJet II. Finally, do NOT
C attempt to send grayscale plots to the drivers that use the optimized
C bitmap dumps. Terrible things will happen.
C
C If you add a driver to this file, please try to use the naming
C convention outlined above and send me a copy of the revisions. I may
C be reached at sca@iowa.physics.uiowa.edu on the Internet or IOWA::SCA
C on SPAN.
C-----------------------------------------------------------------------
C This is the number of currently
C installed devices.
INTEGER*4 NDEV
PARAMETER (NDEV = 9)
C
BYTE ESC, FF
LOGICAL BITMAP(NDEV), INIT, PORTRAIT(NDEV), TEX
INTEGER BUFFER, BX, BY, DEVICE, HC(NDEV), I, IC, IER
INTEGER GRFMEM, GRGMEM, LUN, NPICT
INTEGER VC(NDEV)
REAL MAXX(NDEV), MAXY(NDEV), RESOL(NDEV), XBUF(4)
REAL XMAX, YMAX
CHARACTER ALTTYP(NDEV)*3, DEFNAM*12, MODE*20, MSG*10
CHARACTER TYPE(NDEV)*4
PARAMETER (ESC = 27)
PARAMETER (FF = 12)
PARAMETER (DEFNAM = 'pgplot.ljplt')
SAVE
DATA INIT /.TRUE./
C These are the NDEV sets of
C device characteristics.
DATA BITMAP /.FALSE., .FALSE., .FALSE., .TRUE., .TRUE.,
1 .TRUE., .TRUE., .TRUE., .TRUE./
DATA PORTRAIT /.FALSE., .TRUE., .TRUE., .FALSE., .TRUE.,
1 .FALSE., .TRUE., .TRUE., .TRUE./
DATA HC / 0, 0, 0, 1139, 878,
1 0, 0, 1300, 754/
DATA VC / 0, 0, 0, 1411, 1743,
1 0, 0, 2156, 1605/
DATA MAXX / 3149.0, 2399.0, 2399.0, 1962.0, 1695.0,
1 1574.0, 1199.0, 671.0, 599.0/
DATA MAXY / 2399.0, 3149.0, 3149.0, 1471.0, 1695.0,
1 1199.0, 1574.0, 671.0, 599.0/
DATA RESOL / 300.0, 300.0, 300.0, 300.0, 300.0,
1 150.0, 150.0, 150.0, 100.0/
C These are around only for
C (pre)historical reasons.
DATA ALTTYP / 'HPN', 'HPV', 'TEX', 'HPR', 'HPE',
1 'HPF', 'HPT', 'HPH', 'HPM'/
DATA TYPE / 'LHOR', 'PHOR', 'PHOT', 'LHBR', 'PHBS',
1 'LMBR', 'PMBR', 'PMBS', 'PLBS'/
C-----------------------------------------------------------------------
C First time, translate logical
C name PGPLOT_LJ_MODE and set
C device accordingly.
IF (INIT) THEN
CALL GRGENV ('LJ_MODE', MODE, I)
DO 1 I = 1, NDEV
WRITE (MSG, '(A2, I2.2)') 'LJ', I
IF (MODE(1:4) .EQ. TYPE(I) .OR.
1 MODE(1:3) .EQ. ALTTYP(I) .OR.
2 MODE(1:4) .EQ. MSG(1:4)) THEN
DEVICE = I
GOTO 2
END IF
1 CONTINUE
C If no match, choose LHBR
DEVICE = 4
2 INIT = .FALSE.
C See if user has chosen the
C TeX plotfile format.
TEX = .FALSE.
IF (DEVICE .EQ. 3) TEX = .TRUE.
END IF
C Branch on opcode.
GOTO ( 10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
1 110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
2 210, 220, 230, 240, 250, 260), IFUNC
C Signal an error.
900 WRITE (MSG, '(I10)') IFUNC
CALL GRWARN ('Unimplemented function in LaserJet device driver:'
1 // MSG)
NBUF = -1
RETURN
C
C--- IFUNC = 1, Return device name -------------------------------------
C
10 CONTINUE
WRITE (MSG, '(I2.2)') DEVICE
CHR = 'LJ' // MSG(1 : 2) // ' (' // TYPE(DEVICE) // ')'
NBUF = 0
LCHR = 11
RETURN
C
C--- IFUNC = 2, Return physical min and max for plot device, and range
C of color indices ---------------------------------------
C
20 CONTINUE
RBUF(1) = 0.0
RBUF(2) = MAXX(DEVICE)
RBUF(3) = 0.0
RBUF(4) = MAXY(DEVICE)
RBUF(5) = 0.0
RBUF(6) = 1.0
NBUF = 6
LCHR = 0
RETURN
C
C--- IFUNC = 3, Return device resolution -------------------------------
C
30 CONTINUE
RBUF(1) = RESOL(DEVICE)
RBUF(2) = RESOL(DEVICE)
RBUF(3) = 1.0
NBUF = 3
LCHR = 0
RETURN
C
C--- IFUNC = 4, Return misc device info --------------------------------
C (This device is Hardcopy, No cursor, No dashed lines, No area fill,
C no thick lines)
C
40 CONTINUE
CHR = 'HNNNNNNNNN'
NBUF = 0
LCHR = 10
RETURN
C
C--- IFUNC = 5, Return default file name -------------------------------
C
50 CONTINUE
CHR = DEFNAM
NBUF = 0
LCHR = LEN(DEFNAM)
RETURN
C
C--- IFUNC = 6, Return default physical size of plot -------------------
C
60 CONTINUE
RBUF(1) = 0.0
RBUF(2) = MAXX(DEVICE)
RBUF(3) = 0.0
RBUF(4) = MAXY(DEVICE)
NBUF = 4
LCHR = 0
RETURN
C
C--- IFUNC = 7, Return misc defaults -----------------------------------
C
70 CONTINUE
IF (RESOL(DEVICE) .EQ. 300.0) THEN
RBUF(1) = 3.0
ELSE IF (RESOL(DEVICE) .EQ. 150.0) THEN
RBUF(1) = 2.0
ELSE
RBUF(1) = 1.0
END IF
NBUF = 1
LCHR = 0
RETURN
C
C--- IFUNC = 8, Select plot --------------------------------------------
C
80 CONTINUE
RETURN
C
C--- IFUNC = 9, Open workstation ---------------------------------------
C
90 CONTINUE
C Assume success.
RBUF(2) = 1.0
C Obtain a logical unit number.
CALL GRGLUN (LUN)
C Check for an error.
IF (LUN .EQ. -1) THEN
CALL GRWARN ('Cannot allocate a logical unit.')
RBUF(2) = 0
RETURN
ELSE
RBUF(1) = LUN
END IF
C Open the output file.
OPEN (UNIT = LUN, FILE = CHR(:LCHR), CARRIAGECONTROL = 'NONE',
1 DEFAULTFILE = DEFNAM, STATUS = 'NEW',
2 RECL = 128, FORM = 'UNFORMATTED', RECORDTYPE = 'VARIABLE',
3 IOSTAT = IER)
C Check for an error and cleanup if
C one occurred.
IF (IER .NE. 0) THEN
CALL GRWARN ('Cannot open output file for LaserJet plot: ' //
1 CHR(:LCHR))
RBUF(2) = 0
CALL GRFLUN (LUN)
RETURN
ELSE
C Get the full file specification
C and calculate the length of the
C string
INQUIRE (UNIT = LUN, NAME = CHR)
LCHR = LEN (CHR)
91 IF (CHR (LCHR:LCHR) .EQ. ' ') THEN
LCHR = LCHR - 1
GOTO 91
END IF
END IF
C Initialize the plot file.
IF (.NOT. TEX) THEN
C Choose portrait orientation
WRITE (LUN) ESC, '&l0O'
C Set horizontal and vertical
C spacing
IF (BITMAP(DEVICE)) THEN
WRITE (LUN) ESC, '&l6C'
WRITE (LUN) ESC, '&k10H'
ELSE
WRITE (LUN) ESC, '&k.4H'
WRITE (LUN) ESC, '&l.16C'
END IF
WRITE (LUN) ESC, '&l2E'
END IF
C Set the graphics resolution
WRITE (MSG, '(I3)') INT (RESOL(DEVICE))
WRITE (LUN) ESC, '*t', MSG(1:3), 'R'
C Initialize the page counter.
NPICT = 0
RETURN
C
C--- IFUNC = 10, Close workstation -------------------------------------
C
100 CONTINUE
IF (BITMAP(DEVICE)) THEN
WRITE (LUN) ESC, '&l8C'
ELSE IF (.NOT. TEX) THEN
WRITE (LUN) ESC, '&l6D'
WRITE (LUN) ESC, '&k10H'
WRITE (LUN) ESC, '&l2E'
END IF
C Close the file.
CLOSE (LUN, STATUS = 'KEEP')
C Deallocate the logical unit.
CALL GRFLUN (LUN)
C
RETURN
C
C--- IFUNC = 11, Begin picture -----------------------------------------
C
110 CONTINUE
C Set the bitmap size.
XMAX = RBUF(1)
YMAX = RBUF(2)
C Calculate the dimensions of the
C plot buffer.
IF (PORTRAIT(DEVICE)) THEN
BX = INT (XMAX) / 8 + 1
BY = INT (YMAX) + 1
ELSE
BX = INT (YMAX) / 8 + 1
BY = INT (XMAX) + 1
END IF
C Allocate a plot buffer.
IER = GRGMEM (BX * BY, BUFFER)
C Check for error and clean up
C if one was found.
IF (IER .NE. 1) THEN
CALL GRGMSG (IER)
CALL GRQUIT ('Failed to allocate a plot buffer.')
END IF
C Increment the page number.
NPICT = NPICT + 1
C Eject the page from the printer.
IF (NPICT .GT. 1) WRITE (LUN) FF
C Set the cursor position and
C start graphics mode.
IF (BITMAP(DEVICE)) THEN
WRITE (MSG(1:4), '(I4.4)') HC(DEVICE)
WRITE (MSG(5:8), '(I4.4)') VC(DEVICE)
WRITE (LUN) ESC, '&a', MSG(1:4), 'h', MSG(5:8), 'V'
END IF
C Zero out the plot buffer.
CALL GRLJ04 (BX * BY, %VAL(BUFFER))
RETURN
C
C--- IFUNC = 12, Draw line ---------------------------------------------
C
120 CONTINUE
C Apply any needed tranformation.
IF (PORTRAIT(DEVICE)) THEN
DO 125 I = 1, 4
XBUF(I) = RBUF(I)
125 CONTINUE
ELSE
XBUF(1) = RBUF(2)
XBUF(2) = XMAX - RBUF(1)
XBUF(3) = RBUF(4)
XBUF(4) = XMAX - RBUF(3)
END IF
C Draw the point into the bitmap.
CALL GRLJ00 (1, XBUF, IC, BX, BY, %VAL (BUFFER))
RETURN
C
C--- IFUNC = 13, Draw dot ----------------------------------------------
C
130 CONTINUE
C Apply any needed tranformation.
IF (PORTRAIT(DEVICE)) THEN
DO 135 I = 1, 2
XBUF(I) = RBUF(I)
135 CONTINUE
ELSE
XBUF(1) = RBUF(2)
XBUF(2) = XMAX - RBUF(1)
END IF
C Draw the point into the bitmap.
CALL GRLJ00 (0, XBUF, IC, BX, BY, %VAL(BUFFER))
RETURN
C
C--- IFUNC = 14, End picture -------------------------------------------
C
140 CONTINUE
C Write out the bitmap.
IF (BITMAP(DEVICE)) THEN
CALL GRLJ01 (LUN, BX, BY, %VAL (BUFFER))
ELSE
CALL GRLJ02 (LUN, BX, BY, %VAL (BUFFER), TEX)
END IF
C Deallocate the plot buffer.
IER = GRFMEM (BX * BY, BUFFER)
C Check for an error.
IF (IER .NE. 1) THEN
CALL GRGMSG (IER)
CALL GRWARN ('Failed to deallocate plot buffer.')
END IF
RETURN
C
C--- IFUNC = 15, Select color index ------------------------------------
C
150 CONTINUE
C Save the requested color index.
IC = RBUF(1)
C If out of range set to black.
IF (IC .LT. 0 .OR. IC .GT. 1) THEN
IC = 1
RBUF(1) = IC
END IF
RETURN
C
C--- IFUNC = 16, Flush buffer. -----------------------------------------
C (Not implemented: ignored.)
C
160 CONTINUE
RETURN
C
C--- IFUNC = 17, Read cursor. ------------------------------------------
C (Not implemented: should not be called.)
C
170 CONTINUE
GOTO 900
C
C--- IFUNC = 18, Erase alpha screen. -----------------------------------
C (Not implemented: ignored.)
C
180 CONTINUE
RETURN
C
C--- IFUNC = 19, Set line style. ---------------------------------------
C (Not implemented: should not be called.)
C
190 CONTINUE
GOTO 900
C
C--- IFUNC = 20, Polygon fill. -----------------------------------------
C (Not implemented: should not be called.)
C
200 CONTINUE
GOTO 900
C
C--- IFUNC = 21, Set color representation. -----------------------------
C (Not implemented: ignored.)
C
210 CONTINUE
RETURN
C
C--- IFUNC = 22, Set line width. ---------------------------------------
C (Not implemented: should not be called.)
C
220 CONTINUE
GOTO 900
C
C--- IFUNC = 23, Escape ------------------------------------------------
C (Not implemented: ignored.)
C
230 CONTINUE
RETURN
C
C--- IFUNC = 24, Rectangle fill. ---------------------------------------
C (Not implemented: should not be called.)
C
240 CONTINUE
GOTO 900
C
C--- IFUNC = 25, -------------------------------------------------------
C (Not implemented: should not be called.)
C
250 CONTINUE
GOTO 900
C
C--- IFUNC = 26, Line of pixels. ---------------------------------------
C (Not implemented: should not be called.)
C
260 CONTINUE
GOTO 900
C-----------------------------------------------------------------------
END
C*GRLJ00 -- PGPLOT Hewlett Packard LaserJet driver, draw line
C+
SUBROUTINE GRLJ00 (LINE, RBUF, ICOL, BX, BY, BITMAP)
INTEGER BX, BY, ICOL, LINE
BYTE BITMAP(BX, BY)
REAL RBUF(4)
C
C Draw a straight line segment from absolute pixel coordinates (RBUF(1),
C RBUF(2)) to (RBUF(3), RBUF(4)). The line either overwrites (sets to
C black) or erases (sets to white) the previous contents of the bitmap,
C depending on the current color index. Setting bits is accomplished
C with a VMS BISB2 instruction, expressed in Fortran as .OR.; clearing
C bits is accomplished with a VMS BICB2 instruction, expressed in
C Fortran as .AND. .NOT.. The line is generated with a Simple Digital
C Differential Analyser (ref: Newman & Sproull).
C
C Arguments:
C
C LINE I I =0 for dot, =1 for line.
C RBUF(1),RBUF(2) I R Starting point of line.
C RBUF(3),RBUF(4) I R Ending point of line.
C ICOL I I =0 for erase, =1 for write.
C BITMAP I/O B (address of) the frame buffer.
C
C-----------------------------------------------------------------------
BYTE QMASK(0 : 7)
INTEGER K, KX, KY, LENGTH
REAL D, XINC, XP, YINC, YP
DATA QMASK /'80'X, '40'X, '20'X, '10'X,
1 '08'X, '04'X, '02'X, '01'X/
C-----------------------------------------------------------------------
IF (LINE .GT. 0) THEN
D = MAX (ABS (RBUF(3) - RBUF(1)), ABS (RBUF(4) - RBUF(2)))
LENGTH = D
IF (LENGTH .EQ. 0) THEN
XINC = 0.0
YINC = 0.0
ELSE
XINC = (RBUF(3) - RBUF(1)) / D
YINC = (RBUF(4) - RBUF(2)) / D
END IF
ELSE
LENGTH = 0
XINC = 0.0
YINC = 0.0
END IF
XP = RBUF(1) + 0.5
YP = RBUF(2) + 0.5
IF (ICOL .NE. 0) THEN
DO K = 0, LENGTH
KX = XP
KY = (BY - 1) - INT (YP)
BITMAP(KX / 8 + 1, KY + 1) = BITMAP(KX / 8 + 1, KY + 1) .OR.
1 QMASK(MOD (KX, 8))
XP = XP + XINC
YP = YP + YINC
END DO
ELSE
DO K = 0,LENGTH
KX = XP
KY = (BY - 1) - INT (YP)
BITMAP(KX / 8 + 1, KY + 1) = BITMAP(KX / 8 + 1, KY + 1)
1 .AND. (.NOT. QMASK(MOD (KX, 8)))
XP = XP + XINC
YP = YP + YINC
END DO
END IF
C-----------------------------------------------------------------------
RETURN
END
C*GRLJ01 -- PGPLOT LaserJet driver, copy bitmap to output file
C+
SUBROUTINE GRLJ01 (LUN, BX, BY, BITMAP)
INTEGER BX, BY, LUN
BYTE BITMAP(BX, BY)
C
C Arguments:
C
C LUN (input) Fortran unit number for output
C BX, BY (input) dimensions of BITMAP
C BITMAP (input) the bitmap array
C-----------------------------------------------------------------------
BYTE ESC
INTEGER I, J, K
CHARACTER KSTR*3
PARAMETER (ESC = 27)
C-----------------------------------------------------------------------
C Start graphics mode
WRITE (LUN) ESC, '*r1A'
C Loop through bitmap
DO J = 1, BY
C Search for last non-NUL
DO K = BX, 2, -1
IF (BITMAP(K, J) .NE. '00'X) GO TO 10
END DO
C Guarantee that we know what K
C is after loop.
C (Remember FORTRAN IV!?)
K = 1
C Encode length of line
10 WRITE (KSTR, '(I3.3)') K
C Write out the raster line
WRITE (LUN) ESC, '*b', KSTR, 'W', (BITMAP(I, J), I = 1, K)
END DO
C Turn off graphics mode.
WRITE (LUN) ESC, '*rB'
C-----------------------------------------------------------------------
RETURN
END
C*GRLJ02 -- PGPLOT LaserJet+ driver, dump bitmap to device
C+
SUBROUTINE GRLJ02 (LUN, BX, BY, BITMAP, TEX)
LOGICAL TEX
INTEGER LUN, BX, BY
BYTE BITMAP(BX, BY)
C
C Output raster for this page. This routine has been optimised to
C minimize the memory usage in the LaserJet. This sometimes leads to a
C larger file than if a straight bitmap approach had been used.
C
C NOTE: This subroutine is a kludge to make a 512K LaserJet produce
C full page plots at 300dpi. It will not always produce the plot
C on one page. If you overrun the memory restrictions, two pages
C will be printed, each containing parts of the plot. One must
C then resort to cut and paste techniques to restore the plot.
C Most simple line graphs do not come close to the memory limit,
C but sometimes a messy contour plot will. DON'T EVEN THINK
C ABOUT SENDING A GREYSCALE TO THIS SUBROUTINE!
C
C Arguments:
C
C LUN I I Logical unit number of output file
C BX, BY I I Dimensions of frame buffer
C BITMAP I/O B (address of) the frame buffer.
C
C Version 1.0 03-Sep-1986 S. C. Allendorf
C Version 2.0 08-Dec-1986 S. C. Allendorf Use relative positioning
C Version 2.1 28-Dec-1986 S. C. Allendorf Optimize positioning code
C Version 3.0 02-Jan-1987 S. C. Allendorf Add code for rules
C VERSION 3.1 10-FEB-1988 S. C. Allendorf Attempt to speed up code
C-----------------------------------------------------------------------
BYTE ESC, N0
LOGICAL NOBIT
INTEGER CNUM, CONUM, CURCOL, CURROW, FB(35), FB2(25), I, IPOS
INTEGER IYOFF, J, K, L, M, N, NB(35), NBNUM, NBTOT, NBNUM2
INTEGER NB2(25), RNUM, RONUM, GRLJ03
CHARACTER ALLONE*300, COL*5, NBYTE*4, NULLS*(10), ROW*5, X*300
PARAMETER (N0 = 0)
PARAMETER (ESC = 27)
C-----------------------------------------------------------------------
C Define some useful constants
IF (TEX) THEN
IYOFF = 0
ELSE
IYOFF = 75
END IF
DO J = 1, 10
NULLS(J:J) = CHAR (0)
END DO
DO J = 1, 300
ALLONE(J:J) = CHAR (255)
END DO
C Initialize some variables
CURCOL = 0
CURROW = 0
C Position the cursor
IF (.NOT. TEX) THEN
WRITE (LUN) ESC, '*p0y0X'
END IF
C Set up vertical rule height
WRITE (LUN) ESC, '*c1B'
C Write out each line on page
DO K = 1, BY
C Copy raster to buffer and find
C the beginning and end of the
C bitmap line
NOBIT = .TRUE.
NBTOT = 0
FB(1) = BX
DO J = 1, BX
X(J:J) = CHAR (BITMAP(J,K))
IF (X(J:J) .NE. NULLS(1:1)) THEN
NOBIT = .FALSE.
NBTOT = J
FB(1) = MIN (FB(1), J)
END IF
END DO
C Break line into pieces
IF (.NOT. NOBIT) THEN
L = 1
GO TO 20
10 NB(L) = FB(L) + IPOS - 2
L = L + 1
C Search for first non-null
DO J = NB(L-1) + 11, NBTOT
IF (X(J:J) .NE. NULLS(1:1)) THEN
FB(L) = J
GO TO 20
END IF
END DO
C Search for a string of nulls
20 IPOS = INDEX (X(FB(L):NBTOT), NULLS)
IF (IPOS .EQ. 0) THEN
NB(L) = NBTOT
GO TO 30
ELSE
GO TO 10
END IF
C Loop through each substring
30 DO J = 1, L
C Search for rules
M = 1
FB2(1) = FB(J)
GO TO 50
40 IF (IPOS .NE. 1) THEN
NB2(M) = 0
DO I = FB2(M), FB2(M) + IPOS - 2
IF (X(I:I) .NE. NULLS(1:1)) THEN
NB2(M) = MAX (FB2(M), I)
END IF
END DO
M = M + 1
FB2(M) = FB2(M-1) + IPOS - 1
IF (NB2(M-1) .EQ. 0) THEN
FB2(M-1) = FB2(M)
M = M - 1
END IF
END IF
C Search for first non-<XFF>
DO N = FB2(M) + 25, NB(J)
IF (X(N:N) .NE. ALLONE(1:1)) THEN
NB2(M) = N - 1
M = M + 1
FB2(M) = N
GO TO 50
END IF
END DO
NB2(M) = NB(J)
GO TO 60
C Search for a string of <XFF>s
50 IPOS = INDEX (X(FB2(M):NB(J)), ALLONE(1:25))
IF (IPOS .EQ. 0) THEN
NB2(M) = NB(J)
GO TO 60
ELSE
GO TO 40
END IF
C Print each of the substrings
60 DO I = 1, M
C Get the number of bytes
NBNUM = NB2(I) - FB2(I) + 1
C ENCODE (4, 1000, NBYTE) NBNUM
WRITE (NBYTE, 1000) NBNUM
NBNUM2 = GRLJ03 (NBNUM)
C Calculate the row and column
RONUM = K + IYOFF
CONUM = (FB2(I) - 1) * 8
C Determine the positioning
C sequence and write it out
IF (RONUM .NE. CURROW .AND. CONUM .NE. CURCOL) THEN
RNUM = RONUM - CURROW
CNUM = CONUM - CURCOL
C ENCODE (5, 1010, ROW) RNUM
C ENCODE (5, 1010, COL) CNUM
WRITE (ROW, 1010) RNUM
WRITE (COL, 1010) CNUM
RNUM = GRLJ03 (ABS (RNUM)) + 1
CNUM = GRLJ03 (ABS (CNUM)) + 1
WRITE (LUN) ESC, '*p', ROW(6-RNUM:5), 'y',
+ COL(6-CNUM:5), 'X'
ELSE IF (RONUM .NE. CURROW) THEN
RNUM = RONUM - CURROW
C ENCODE (5, 1010, ROW) RNUM
WRITE (ROW, 1010) RNUM
RNUM = GRLJ03 (ABS (RNUM)) + 1
WRITE (LUN) ESC, '*p', ROW(6-RNUM:5), 'Y'
ELSE IF (CONUM .NE. CURCOL) THEN
CNUM = CONUM - CURCOL
C ENCODE (5, 1010, COL) CNUM
WRITE (COL, 1010) CNUM
CNUM = GRLJ03 (ABS (CNUM)) + 1
WRITE (LUN) ESC, '*p', COL(6-CNUM:5), 'X'
END IF
C Check for all bits set in
C substring
IF ((INDEX (X(FB2(I):NB2(I)), ALLONE(1:NBNUM)) .EQ. 1)
+ .AND. NBNUM .GE. 5) THEN
NBNUM = NBNUM * 8
C ENCODE (4, 1000, NBYTE) NBNUM
WRITE (NBYTE, 1000) NBNUM
NBNUM2 = GRLJ03 (NBNUM)
WRITE (LUN) ESC, '*c', NBYTE(5-NBNUM2:4), 'A'
WRITE (LUN) ESC, '*c0P'
CURROW = RONUM
CURCOL = CONUM
ELSE
C Write out raster line
WRITE (LUN) ESC, '*r1A'
WRITE (LUN) ESC, '*b', NBYTE(5-NBNUM2:4), 'W',
+ X(FB2(I):NB2(I))
WRITE (LUN) ESC, '*rB'
CURROW = RONUM + 1
CURCOL = CONUM
END IF
END DO
END DO
END IF
END DO
C-----------------------------------------------------------------------
1000 FORMAT (I4.4)
1010 FORMAT (SP,I5)
RETURN
END
C*GRLJ03 -- PGPLOT LaserJet+ driver, calculate length of an integer
C+
INTEGER FUNCTION GRLJ03 (I)
INTEGER I
C
C This function calculates the number of digits in a supplied integer.
C
C Arguments:
C
C I I I Integer value of number
C GRLJ03 O I Length of printed representation of I
C
C Version 1.0 10-Feb-1988 S. C. Allendorf
C-----------------------------------------------------------------------
IF (I .GE. 10) THEN
IF (I .GE. 100) THEN
IF (I .GE. 1000) THEN
GRLJ03 = 4
ELSE
GRLJ03 = 3
END IF
ELSE
GRLJ03 = 2
END IF
ELSE
GRLJ03 = 1
END IF
C-----------------------------------------------------------------------
RETURN
END
C*GRLJ04 -- zero fill buffer
C+
SUBROUTINE GRLJ04 (BUFSIZ,BUFFER)
C
C Arguments:
C
C BUFFER (byte array, input): (address of) the buffer.
C BUFSIZ (integer, input): number of bytes in BUFFER.
C-----------------------------------------------------------------------
INTEGER BUFSIZ, I
BYTE BUFFER(BUFSIZ), FILL
DATA FILL /0/
C
DO 10 I=1,BUFSIZ
BUFFER(I) = FILL
10 CONTINUE
END
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