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|
C*MFDRIV -- PGPLOT Graphics MetaFile driver
C+
SUBROUTINE MFDRIV (IFUNC, RBUF, NBUF, CHR, LCHR)
INTEGER IFUNC, NBUF, LCHR
REAL RBUF(*)
CHARACTER*(*) CHR
C
C PGPLOT driver for Graphics MetaFile device.
C
C Version 1.0 - 1989 May 09 - S. C. Allendorf
C First attempt at recreating the old
C MetaFile device. Code based on original
C version written by Tim Pearson.
C Version 1.1 - 1989 May 20 - S. C. Allendorf
C Make driver conform as closely as possible
C to the standard without breaking GMFPLOT
C and/or PGPLOT. Deviations from the
C standard are marked with
C *** DEVIATION ***. GMFPLOT and/or PGPLOT
C would need to be changed to correct these
C parts.
C=======================================================================
C
C Supported device: The MetaFile device can be used to a store graphic
C image in a device-independent disk file.
C
C Device type code: /FILE.
C
C Default device name: PGPLOT.GMF.
C
C Default view surface dimensions: Undefined (nominally 8 inches
C square).
C
C Resolution: Undefined.
C
C Color capability: Color indices 0-255 are accepted and the
C representation of all colors may be changed. The actual colors used
C depend upon the output device chosen when the file is rendered.
C
C Input capability: None.
C
C File format: The metafile generated follow the "GSPC Metafile
C Proposal" described in Computer Graphics (A.C.M.), Volume 13, number 3
C (August 1979).
C
C Obtaining hardcopy: Use the translator program GMFPLOT.
C-----------------------------------------------------------------------
LOGICAL CONT
INTEGER*2 BUFFER(360), COMBUF(5), I0, I1, IB, IC, IG, IR, J0, J1
INTEGER*2 LASTI, LASTJ, NPICT, NPTS
INTEGER*4 HW, IER, LUN, REMCAL
REAL*4 RATIO, SCALE, XMAX, YMAX
CHARACTER MSG*10
CHARACTER*(*) DEFNAM, TYPE
PARAMETER (DEFNAM = 'PGPLOT.GMF')
PARAMETER (TYPE = 'FILE (PGPLOT graphics metafile)')
C-----------------------------------------------------------------------
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 MetaFile device driver:'
1 // MSG)
NBUF = -1
RETURN
C
C--- IFUNC = 1, Return device name -------------------------------------
C
10 CONTINUE
CHR = TYPE
NBUF = 0
LCHR = LEN(TYPE)
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) = 32767.0
RBUF(3) = 0.0
RBUF(4) = 32767.0
RBUF(5) = 0.0
RBUF(6) = 255.0
NBUF = 6
LCHR = 0
RETURN
C
C--- IFUNC = 3, Return device resolution -------------------------------
C
30 CONTINUE
RBUF(1) = 4096.0
RBUF(2) = 4096.0
RBUF(3) = 1.0
NBUF = 3
LCHR = 0
RETURN
C
C--- IFUNC = 4, Return misc device info --------------------------------
C (This device is Hardcopy, No cursor, Dashed lines, Area fill,
C Thick lines, Rectangle fill, No line of pixels)
C
40 CONTINUE
CHR = 'HNDATRNNNN'
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) = 32767.0
RBUF(3) = 0.0
RBUF(4) = 32767.0
NBUF = 4
LCHR = 0
RETURN
C
C--- IFUNC = 7, Return misc defaults -----------------------------------
C
70 CONTINUE
RBUF(1) = 20.0
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) = 0.0
RETURN
ELSE
RBUF(1) = LUN
END IF
C Open the output file.
OPEN (UNIT = LUN, FILE = CHR(:LCHR), CARRIAGECONTROL = 'NONE',
1 DEFAULTFILE = DEFNAM, DISPOSE = 'DELETE', STATUS = 'NEW',
2 RECL = 180, FORM = 'UNFORMATTED', RECORDTYPE = 'FIXED',
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 MetaFile plot: ' //
1 CHR(:LCHR))
CALL GRFLUN (LUN)
RBUF(2) = 0
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)
95 IF (CHR (LCHR:LCHR) .EQ. ' ') THEN
LCHR = LCHR - 1
GOTO 95
END IF
END IF
C Initialize the page counter.
NPICT = 0
C Initialize the high water mark.
HW = 0
C Send the BEGIN_METAFILE command,
C requesting 15-bit precision.
COMBUF(1) = '8001'X
COMBUF(2) = '0001'X
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
RETURN
C
C--- IFUNC = 10, Close workstation -------------------------------------
C
100 CONTINUE
C Send the END_METAFILE command.
CALL GRMF01 (1, '8100'X, BUFFER, LUN, HW)
C Flush the buffer.
CALL GRMF02 (LUN, HW, BUFFER)
C Close the file.
CLOSE (LUN, DISPOSE = 'KEEP')
C Deallocate the logical unit.
CALL GRFLUN (LUN)
C
RETURN
C
C--- IFUNC = 11, Begin picture -----------------------------------------
C
110 CONTINUE
C Increment the page number.
NPICT = NPICT + 1
C *** DEVIATION ***
C The MetaFile standard defines
C the initial pen position to be at
C (0, 0). This causes problems for
C PGPLOT.
C
C Set the last position to unknown.
LASTI = -1
LASTJ = -1
C Check to see if this is the first
C picture.
IF (NPICT .EQ. 1) THEN
C Initialize the requested size and
C and scale factor.
XMAX = INT (RBUF(1) + 0.5)
YMAX = INT (RBUF(2) + 0.5)
SCALE = 1.0
C See if the user has requested a
C specific size.
IF (XMAX .NE. 32767.0 .OR. YMAX .NE. 32767.0) THEN
C Calculate the the maximum
C coordinates and the scale factor.
COMBUF(2) = 32767
COMBUF(3) = 32767
RATIO = (YMAX + 1.0) / (XMAX + 1.0)
IF (RATIO .LT. 1.0) THEN
SCALE = 32767.0 / XMAX
XMAX = 32767.0
YMAX = INT (32768.0 * RATIO - 0.5)
COMBUF(3) = YMAX
ELSE IF (RATIO .GT. 1.0) THEN
SCALE = 32767.0 / YMAX
XMAX = INT (32768.0 / RATIO - 0.5)
YMAX = 32767.0
COMBUF(2) = XMAX
ELSE
SCALE = 32767.0 / XMAX
XMAX = 32767.0
YMAX = 32767.0
END IF
C Send DEFINE_NDC_SPACE command
C along with X, Y, and Z ranges if
C the user hasn't requested a
C square plot.
IF (RATIO .NE. 1.0) THEN
COMBUF(1) = '8203'X
COMBUF(4) = 0
CALL GRMF01 (4, COMBUF, BUFFER, LUN, HW)
END IF
END IF
END IF
C Flush buffer to get to a record
C boundary.
CALL GRMF02 (LUN, HW, BUFFER)
C Send BEGIN_PICTURE command with
C the picture number.
COMBUF(1) = '9001'X
COMBUF(2) = NPICT
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
RETURN
C
C--- IFUNC = 12, Draw line ---------------------------------------------
C
120 CONTINUE
C Scale and convert to integer.
I0 = INT (MIN (RBUF(1) * SCALE + 0.5, XMAX))
J0 = INT (MIN (RBUF(2) * SCALE + 0.5, YMAX))
I1 = INT (MIN (RBUF(3) * SCALE + 0.5, XMAX))
J1 = INT (MIN (RBUF(4) * SCALE + 0.5, YMAX))
C See if this is a continuation.
CONT = (LASTI .EQ. I0) .AND. (LASTJ .EQ. J0)
C Draw the line.
CALL GRMF00 (I0, J0, I1, J1, CONT, BUFFER, LUN, HW)
C Update the last position
LASTI = I1
LASTJ = J1
RETURN
C
C--- IFUNC = 13, Draw dot ----------------------------------------------
C
130 CONTINUE
C Convert to integer.
I0 = INT (MIN (RBUF(1) * SCALE + 0.5, XMAX))
J0 = INT (MIN (RBUF(2) * SCALE + 0.5, YMAX))
C Draw the dot.
CALL GRMF00 (I0, J0, I0, J0, .FALSE., BUFFER, LUN ,HW)
C Update the last position.
LASTI = I0
LASTJ = J0
RETURN
C
C--- IFUNC = 14, End picture -------------------------------------------
C
140 CONTINUE
C Send a END_PICTURE command.
CALL GRMF01 (1, '9100'X, BUFFER, LUN, HW)
RETURN
C
C--- IFUNC = 15, Select color index ------------------------------------
C
150 CONTINUE
C Save the requested color index.
IC = RBUF(1)
C *** DEVIATION ***
C The MetaFile standard defines
C indices 0-7 and they are
C different than those defined by
C PGPLOT.
C
C Send the SET_COLOR command along
C with the color index.
COMBUF(1) = 'C101'X
COMBUF(2) = IC
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
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
190 CONTINUE
C Convert to an integer.
IC = RBUF(1)
C Send SET_LINESTYLE command along
C width the requested linestyle.
COMBUF(1) = 'C301'X
COMBUF(2) = IC
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
RETURN
C
C--- IFUNC = 20, Polygon fill. -----------------------------------------
C
200 CONTINUE
IF (REMCAL .EQ. 0) THEN
C First time, send DRAW_POLYGON and
C the number of points.
NPTS = RBUF(1)
REMCAL = NPTS
COMBUF(1) = 'A701'X
COMBUF(2) = NPTS
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
ELSE
C Second and succeeding calls,
C MOVE to first point, DRAW to the
C rest, and decrement the counter.
COMBUF(1) = INT (MIN (RBUF(1) * SCALE + 0.5, XMAX))
COMBUF(2) = INT (MIN (RBUF(2) * SCALE + 0.5, YMAX))
IF (REMCAL .NE. NPTS) COMBUF(2) = IBSET (COMBUF(2), 15)
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
REMCAL = REMCAL - 1
C *** DEVIATION ***
C The MetaFile standard defines
C the pen position after a polygon
C draw to be at the first point.
C This causes problems for PGPLOT.
C
C Set the pen position to unknown.
IF (REMCAL .EQ. 0) LASTI = -1
END IF
RETURN
C
C--- IFUNC = 21, Set color representation. -----------------------------
C
210 CONTINUE
C *** DEVIATION ***
C The MetaFile standard defines
C indices 0-7 and does not allow
C them to be changed.
C
C Convert input to integer
IC = RBUF(1)
IR = INT (MIN (32767.0, MAX (RBUF(2) * 32767.0, 0.0)))
IG = INT (MIN (32767.0, MAX (RBUF(3) * 32767.0, 0.0)))
IB = INT (MIN (32767.0, MAX (RBUF(4) * 32767.0, 0.0)))
C Send DEFINE_COLOR_INDEX command
C along with the index to be
C defined and its definition.
COMBUF(1) = 'C004'X
COMBUF(2) = IC
COMBUF(3) = IR
COMBUF(4) = IG
COMBUF(5) = IB
CALL GRMF01 (5, COMBUF, BUFFER, LUN, HW)
RETURN
C
C--- IFUNC = 22, Set line width. ---------------------------------------
C
220 CONTINUE
C *** DEVIATION ***
C The MetaFile standard defines
C linewidths differently than
C PGPLOT.
C
C Convert to an integer.
IC = RBUF(1)
C Send SET_LINEWIDTH command along
C with the requested line width.
COMBUF(1) = 'C401'X
COMBUF(2) = IC
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
RETURN
C
C--- IFUNC = 23, Escape ------------------------------------------------
C (Not implemented: ignored.)
C
230 CONTINUE
RETURN
C
C--- IFUNC = 24, Rectangle fill. ---------------------------------------
C
240 CONTINUE
C Scale and convert to integer.
I0 = INT (MIN (RBUF(1) * SCALE + 0.5, XMAX))
J0 = INT (MIN (RBUF(2) * SCALE + 0.5, YMAX))
I1 = INT (MIN (RBUF(3) * SCALE + 0.5, XMAX))
J1 = INT (MIN (RBUF(4) * SCALE + 0.5, YMAX))
C Simulate a hardware area fill.
COMBUF(1) = 'A701'X
COMBUF(2) = 4
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
COMBUF(1) = I0
COMBUF(2) = J0
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
COMBUF(1) = I1
COMBUF(2) = IBSET (J0, 15)
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
COMBUF(1) = I1
COMBUF(2) = IBSET (J1, 15)
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
COMBUF(1) = I0
COMBUF(2) = IBSET (J1, 15)
CALL GRMF01 (2, COMBUF, BUFFER, LUN, HW)
C *** DEVIATION ***
C The MetaFile standard defines
C the pen position after a polygon
C draw to be at the first point.
C This causes problems for PGPLOT.
C
C Set the pen position to unknown.
LASTI = -1
RETURN
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*GRMF00 -- PGPLOT MetaFile driver, draw a line segment
C+
SUBROUTINE GRMF00 (I0, J0, I1, J1, CONT, BUFFER, LUN, HW)
LOGICAL CONT
INTEGER*2 BUFFER(360), I0, I1, J0, J1
INTEGER*4 HW, LUN
C-----------------------------------------------------------------------
C Draw a line. This requires a MOVE command (unless the starting point
C is the same point as the end point of the last line) followed by a
C DRAW command.
C
C Arguments:
C
C I0, J0 (input) The absolute device coordinates of the
C starting point of the line
C I1, J1 (input) The absolute device coordinates of the ending
C point of the line
C CONT (input) Flag denoting whether the line is a
C continuation
C BUFFER (input/output) The buffer
C-----------------------------------------------------------------------
INTEGER*2 OUTPUT(4)
INTEGER*4 K
C-----------------------------------------------------------------------
C Initialize the counter.
K = 0
C See if we need to MOVE first.
IF (.NOT. CONT) THEN
C Increment the counter.
K = 2
C Output the coordinates.
OUTPUT(1) = I0
OUTPUT(2) = J0
END IF
C Send the x coordinate.
OUTPUT(K + 1) = I1
C Mark the y coordinate as a DRAW
C command and output it.
OUTPUT(K + 2) = IBSET (J1, 15)
C Increment the counter.
K = K + 2
C Transfer the coordinates to the
C buffer.
CALL GRMF01 (K, OUTPUT, BUFFER, LUN, HW)
C-----------------------------------------------------------------------
RETURN
END
C*GRMF01 -- PGPLOT MetaFile driver, transfer chunks to output buffer
C+
SUBROUTINE GRMF01 (N, CHUNKS, BUFFER, LUN, HW)
INTEGER*4 HW, LUN, N
INTEGER*2 CHUNKS(N), BUFFER(360)
C
C Transfer metafile chunks to output buffer. If the command would
C overflow, it is flushed to the output device using routine GRMF02.
C
C Arguments:
C
C N (input) The number of chunks to transfer
C CHUNKS (input) The chunks to transfer
C BUFFER (input/output) The buffer
C LUN (input) Fortran unit number for output
C HW (input/output) Number of elements used in BUFFER
C-----------------------------------------------------------------------
INTEGER*4 I
C-----------------------------------------------------------------------
C Flush the buffer if the command
C would overflow it.
IF (HW + N .GT. 360) CALL GRMF02 (LUN, HW, BUFFER)
C Transfer the chunks to the
C buffer.
DO 10 I = 1, N
C Increment the high water mark.
HW = HW + 1
C Move the chunk to the buffer.
BUFFER(HW) = CHUNKS(I)
10 CONTINUE
C-----------------------------------------------------------------------
RETURN
END
C*GRMF02 -- PGPLOT MetaFile driver, flush metafile buffer contents
C+
SUBROUTINE GRMF02 (LUN, HW, BUFFER)
INTEGER*2 BUFFER(360)
INTEGER*4 HW, LUN
C
C Flush metafile buffer contents. If the buffer is not full, it is
C padded with NO_OPERATION commands.
C
C Arguments:
C
C LUN (input) Fortran unit number for output
C HW (input/output) Number of elements used in BUFFER
C BUFFER (input/output) The buffer
C-----------------------------------------------------------------------
INTEGER*4 I
C-----------------------------------------------------------------------
C See if the buffer has anything in
C it.
IF (HW .GT. 0) THEN
C Fill buffer with NO_OPERATION
C commands.
DO 10 I = HW + 1 ,360
BUFFER(I) = '8400'X
10 CONTINUE
C Write out the buffer.
WRITE (LUN) BUFFER
C Reset the high water mark.
HW = 0
END IF
C-----------------------------------------------------------------------
RETURN
END
|
