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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <xwhen.h>
include <config.h>
include <imhdr.h>
include <mach.h>
include <error.h>
include <ctype.h>
include <fset.h>
include <gset.h>
include <mwset.h>
define SZ_BUF 2048 # Initial pixel buffer size
define MAX_CURVES 20 # maximum curves if overplotting
define LIST_OP 1
define IMAGE_OP 2
# GRAPH -- Graphing utility where input may be one or more lists (y or x,y)
# or image sections. Multidimensional image sections are reduced to a vector
# by computing the projection about the indicated axis. Many options are
# available to personalize the plot; see the manual page for a full description.
procedure t_graph()
char input[SZ_LINE]
pointer x[MAX_CURVES], y[MAX_CURVES], size[MAX_CURVES]
int npix[MAX_CURVES], ncurves
bool append, overplot
char device[SZ_FNAME]
int tgrjmp[LEN_JUMPBUF], epa, old_onint, status, i
bool clgetb()
int fstati()
extern tgr_onint()
common /tgrcom/ tgrjmp
begin
# Initialize curve pointers to NULL, in case ggplot aborts without
# allocating any buffers.
do i = 1, MAX_CURVES {
x[i] = NULL
y[i] = NULL
size[i] = NULL
npix[i] = NULL
}
if (fstati (STDIN, F_REDIR) == YES)
call strcpy ("STDIN", input, SZ_FNAME)
else
call clgstr ("input", input, SZ_LINE)
# Fetch plotting parameters.
call clgstr ("device", device, SZ_FNAME)
overplot = clgetb ("overplot")
append = clgetb ("append")
# Install interrupt exception handler.
call zlocpr (tgr_onint, epa)
call xwhen (X_INT, epa, old_onint)
call zsvjmp (tgrjmp, status)
if (status == OK) {
# Fetch remaining params and draw the plot.
iferr (call ggplot (device, overplot, append, input, x, y,
size, npix, ncurves))
status = ERR
}
if (status == ERR)
call fseti (STDOUT, F_CANCEL, OK)
# Return buffer space whether or not an error occurs while plotting.
do i = 1, MAX_CURVES {
call mfree (x[i], TY_REAL)
call mfree (y[i], TY_REAL)
call mfree (size[i], TY_REAL)
}
if (status == ERR)
call erract (EA_ERROR)
end
# TGR_ONINT -- Interrupt handler for the task graph. Branches back to ZSVJMP
# in the main routine to permit shutdown without an error message.
procedure tgr_onint (vex, next_handler)
int vex # Virtual exception
int next_handler # not used
int tgrjmp[LEN_JUMPBUF]
common /tgrcom/ tgrjmp
begin
call xer_reset()
call zdojmp (tgrjmp, vex)
end
# GGPLOT -- Does the real work of making the graph, after the graphics
# devics has been opened. Fetch remaining parameters, read in the data,
# and make the plot.
procedure ggplot (device, overplot, append, input, x, y, size, npix, ncurves)
char device[SZ_FNAME] # Graphics device
bool overplot # Overplot graph
bool append # Append graph
char input[ARB] # List of operands to be plotted
pointer x[MAX_CURVES] # X values
pointer y[MAX_CURVES] # Y values
pointer size[MAX_CURVES] # Size of markers to plot
int npix[MAX_CURVES] # Number of points per curve
int ncurves # Number of curves to overplot
pointer gd
char xlabel[SZ_LINE], ylabel[SZ_LINE], title[SZ_LINE]
char marker[SZ_FNAME], wcs[SZ_FNAME], xformat[SZ_FNAME], yformat[SZ_FNAME]
bool pointmode, lintran, xautoscale, yautoscale
bool drawbox, transpose, rdmarks
int ltype, color, ip1, ip2
int xtran, ytran, axis, ticklabels, i, marker_type, j
real p1, p2, q1, q2, wx1, wx2, wy1, wy2, szmarker, vx1, vx2, vy1, vy2
real xx, yy, sz, szx, szy
pointer sp, ltypes, colors, ptemp
pointer gopen()
bool clgetb(), streq(), fp_equalr()
int clgeti(), gg_rdcurves(), ctoi(), gstati()
real clgetr(), plt_iformatr()
errchk clgetb, clgeti, clgstr, clgetr, glabax, gpmark
errchk gswind, gseti, gg_rdcurves, gascale, grscale
begin
call smark (sp)
call salloc (ltypes, SZ_LINE, TY_CHAR)
call salloc (colors, SZ_LINE, TY_CHAR)
# If computing projection along an axis (collapsing a multidimensional
# section to a vector), fetch axis number. Get wcs string.
axis = clgeti ("axis")
call clgstr ("wcs", wcs, SZ_FNAME)
# Set the line type and color lists.
i = 0
call clgstr ("ltypes", Memc[ltypes], SZ_LINE)
for (ip1=ltypes; Memc[ip1]!=EOS; ip1=ip1+1) {
if (Memc[ip1] == ',')
Memc[ip1] = ' '
if (IS_DIGIT(Memc[ip1]))
i = i + 1
}
if (i == 0)
Memc[ltypes] = EOS
ip1 = 1
ltype = 0
i = 0
call clgstr ("colors", Memc[colors], SZ_LINE)
for (ip2=colors; Memc[ip2]!=EOS; ip2=ip2+1) {
if (Memc[ip2] == ',')
Memc[ip2] = ' '
if (IS_DIGIT(Memc[ip2]))
i = i + 1
}
if (i == 0)
Memc[colors] = EOS
ip2 = 1
color = 0
# If pointmode is enabled, get marker character to be used to mark
# points. The size of the character is given
# by szmarker; if zero, the size will be taken from the input list.
pointmode = clgetb ("pointmode")
szmarker = 0.0
rdmarks = false
if (pointmode) {
call clgstr ("marker", marker, SZ_FNAME)
call init_marker (marker, marker_type)
if (marker_type != GM_POINT) {
szmarker = clgetr ("szmarker")
rdmarks = (szmarker <= 0)
}
} else
call clgstr ("marker", marker, SZ_FNAME)
# Read all the curves specified by the operands in input into memory.
# Get the first image title and coordinate label.
title[1] = EOS
xlabel[1] = EOS
ylabel[1] = EOS
xformat[1] = EOS
yformat[1] = EOS
ncurves = gg_rdcurves (input, title, xlabel, ylabel, xformat,
x, y, size, npix, axis, wcs, rdmarks)
if (overplot || append)
gd = gopen (device, APPEND, STDGRAPH)
else
gd = gopen (device, NEW_FILE, STDGRAPH)
xautoscale = false
yautoscale = false
# Set window and viewport. If user window has not been set, enable
# autoscaling. If device viewport has not been set, let glabax
# handle the viewport internally.
if (!append) {
wx1 = clgetr ("wx1")
wx2 = clgetr ("wx2")
wy1 = clgetr ("wy1")
wy2 = clgetr ("wy2")
if (fp_equalr (wx1, wx2))
xautoscale = true
if (fp_equalr (wy1, wy2))
yautoscale = true
vx1 = clgetr ("vx1")
vx2 = clgetr ("vx2")
vy1 = clgetr ("vy1")
vy2 = clgetr ("vy2")
if (!(fp_equalr (vx1, vx2)) && !(fp_equalr (vy1, vy2)))
call gsview (gd, vx1, vx2, vy1, vy2)
if (!clgetb ("fill"))
call gseti (gd, G_ASPECT, 1)
if (clgetb ("round"))
call gseti (gd, G_ROUND, YES)
}
# Draw box around plot?
drawbox = false
if (!append)
if (clgetb ("box"))
drawbox = true
if (drawbox) {
# Get number of major and minor tick marks.
call gseti (gd, G_XNMAJOR, clgeti ("majrx"))
call gseti (gd, G_XNMINOR, clgeti ("minrx"))
call gseti (gd, G_YNMAJOR, clgeti ("majry"))
call gseti (gd, G_YNMINOR, clgeti ("minry"))
# Fetch plot title, labels and format
call clgstr ("title", wcs, SZ_LINE)
if (!streq (wcs, "imtitle"))
call strcpy (wcs, title, SZ_LINE)
call clgstr ("xlabel", wcs, SZ_LINE)
if (!streq (wcs, "wcslabel"))
call strcpy (wcs, xlabel, SZ_LINE)
call clgstr ("ylabel", ylabel, SZ_LINE)
call clgstr ("xformat", wcs, SZ_LINE)
if (!streq (wcs, "wcsformat"))
call strcpy (wcs, xformat, SZ_FNAME)
call clgstr ("yformat", yformat, SZ_LINE)
# Label tick marks on axes?
ticklabels = NO
if (clgetb ("ticklabels"))
ticklabels = YES
}
# Perform linear transformation on the X axis?
lintran = clgetb ("lintran")
if (lintran) {
p1 = clgetr ("p1")
p2 = clgetr ("p2")
q1 = clgetr ("q1")
q2 = clgetr ("q2")
}
# Transpose X,Y axes?
transpose = clgetb ("transpose")
# Log scale? Call gswind to set log scaling regardless of whether
# the user window is known; if the user window was not input,
# autoscaling will reset it later.
if (append) {
xtran = gstati (gd, G_XTRAN)
ytran = gstati (gd, G_YTRAN)
call ggwind (gd, wx1, wx2, wy1, wy2)
} else {
xtran = GW_LINEAR
if (clgetb ("logx"))
xtran = GW_LOG
ytran = GW_LINEAR
if (clgetb ("logy"))
ytran = GW_LOG
wx1 = plt_iformatr (wx1, xformat)
wx2 = plt_iformatr (wx2, xformat)
wy1 = plt_iformatr (wy1, yformat)
wy2 = plt_iformatr (wy2, yformat)
call gswind (gd, wx1, wx2, wy1, wy2)
call gseti (gd, G_XTRAN, xtran)
call gseti (gd, G_YTRAN, ytran)
}
# Carry out linear transformation on X coords, if desired.
if (lintran)
do i = 1, ncurves
call gg_lintran (Memr[x[i]], npix[i], p1,p2, q1,q2)
# Swap axes, if enabled. Note that the linear transformation of
# the x-axis should be performed before axes are swapped. This is
# because the purpose of the lintran option is to provide a means
# of assigning a coordinate system to a pixel array.
if (transpose)
do i = 1, ncurves {
ptemp = x[i]
x[i] = y[i]
y[i] = ptemp
}
# Autoscale if enabled.
if (xautoscale) {
call gascale (gd, Memr[x[1]], npix[1], 1)
if (ncurves > 1) {
do i = 2, ncurves
call grscale (gd, Memr[x[i]], npix[i], 1)
}
}
if (yautoscale) {
call gascale (gd, Memr[y[1]], npix[1], 2)
if (ncurves > 1) {
do i = 2, ncurves
call grscale (gd, Memr[y[i]], npix[i], 2)
}
}
# Draw box around plot if enabled.
if (drawbox) {
call gsets (gd, G_XTICKFORMAT, xformat)
call gsets (gd, G_YTICKFORMAT, yformat)
call gseti (gd, G_LABELTICKS, ticklabels)
call glabax (gd, title, xlabel, ylabel)
}
# Draw the curves.
do i = 1, ncurves {
if (Memc[ltypes] == EOS)
ltype = ltype + 1
else if (ctoi (Memc[ltypes], ip1, j) > 0)
ltype = j
ltype = mod (ltype - 1, 4) + 1
call gseti (gd, G_PLTYPE, ltype)
if (Memc[colors] == EOS)
color = color + 1
else if (ctoi (Memc[colors], ip2, j) > 0)
color = j
color = mod (color - 1, 9) + 1
call gseti (gd, G_PLCOLOR, color)
if (pointmode) {
if (!rdmarks) {
call amovkr (szmarker, Memr[size[i]], npix[i])
call gpmark (gd, Memr[x[i]], Memr[y[i]], npix[i],
marker_type, Memr[size[i]], Memr[size[i]])
} else {
if (szmarker < 0)
call amulkr (Memr[size[i]], szmarker, Memr[size[i]],
npix[i])
do j = 1, npix[i] {
xx = Memr[x[i]+j-1]
yy = Memr[y[i]+j-1]
sz = Memr[size[i]+j-1]
szx= sz; szy = sz
if (marker_type == GM_VEBAR)
szx = 1.0
else if (marker_type == GM_HEBAR)
szy = 1.0
call gmark (gd, xx, yy, marker_type, szx, szy)
}
}
} else
call hgpline (gd, Memr[x[i]], Memr[y[i]], npix[i], marker)
}
call gclose (gd)
call sfree (sp)
end
# GG_RDCURVES -- Given the operand list as input, read in all the referenced
# lists and/or image sections, producing a list of vectors as output. Return
# as the function value the number of curves.
int procedure gg_rdcurves (oplist, title, xlabel, ylabel, xformat,
x, y, size, npix, axis, wcs, rdmarks)
char oplist[ARB] # Operand list
char title[ARB] # Title
char xlabel[ARB] # X label
char ylabel[ARB] # Y label
char xformat[ARB] # WCS coordinate format
pointer x[ARB] # Pointer to x vector
pointer y[ARB] # Pointer to y vector
pointer size[ARB] # Pointer to vector of marker sizes
int npix[ARB] # Number of values per vector
int axis # Axis for projection
char wcs[ARB] # WCS type
bool rdmarks # Read marks from list?
char operand[SZ_FNAME]
int ncurves, i, fd
int gg_rdcurve(), imtopen(), imtgetim()
begin
ncurves = 0
# Read all the curves into memory.
fd = imtopen (oplist)
while (imtgetim (fd, operand, SZ_FNAME) != EOF) {
ncurves = ncurves + 1
if (ncurves > MAX_CURVES)
call error (0, "Maximum of 20 curves can be overplotted")
i = ncurves
iferr {
npix[i] = gg_rdcurve (operand, title, xlabel, ylabel,
xformat, x[i], y[i], size[i], axis, wcs, rdmarks)
} then {
call erract (EA_WARN)
ncurves = ncurves - 1
}
}
call imtclose (fd)
if (ncurves == 0)
call error (0, "No curves read")
else
return (ncurves)
end
# GG_RDCURVE -- Read a curve into memory. The operand may specify either
# list or image input; we determine which and then call the appropriate
# input routine to access the data. Set the image title and coordinate
# label if not previously defined.
int procedure gg_rdcurve (operand, title, xlabel, ylabel, xformat,
x, y, size, axis, wcs, rdmarks)
char operand[ARB] # List of operaands to be plotted
char title[ARB] # Title
char xlabel[ARB] # X label
char ylabel[ARB] # Y label
char xformat[ARB] # WCS coordinate format
pointer x, y, size # Pointers to x, y and size arrays
int axis # Axis of image projection
char wcs[ARB] # WCS type
bool rdmarks # Read marks from list?
int gg_rdlist2(), gg_rdimage2(), gg_optype()
errchk gg_rdlist2, gg_rdimage2, gg_optype
begin
if (gg_optype (operand) == LIST_OP)
return (gg_rdlist2 (operand, x, y, size, rdmarks))
else
return (gg_rdimage2 (operand, title, xlabel, ylabel, xformat,
x, y, size, axis, wcs))
end
# GG_OPTYPE -- Determine whether the operand argument is an image section
# or a list. If the string is STDIN, it is a list; if a subscript is
# present, it is an image; otherwise we must test whether or not it is a
# binary file and make the decision based on that.
int procedure gg_optype (operand)
char operand[ARB] # Operand to be plotted
int first, last, ip
int access(), strncmp()
begin
# Strip off any whitespace at the beginning or end of the string.
for (ip=1; IS_WHITE(operand[ip]); ip=ip+1)
;
first = ip
for (last=ip; operand[ip] != EOS; ip=ip+1)
if (!IS_WHITE(operand[ip]))
last = ip
if (first == last)
return (LIST_OP)
else if (strncmp (operand[first], "STDIN", 5) == 0)
return (LIST_OP)
else if (operand[last] == ']')
return (IMAGE_OP)
else if (access (operand, 0, TEXT_FILE) == YES)
return (LIST_OP)
else
return (IMAGE_OP)
end
# GG_RDIMAGE2 -- Read an image section and compute the projection about
# one dimension, producing x and y vectors as output. Set the title
# and coordinate label if not previously defined.
int procedure gg_rdimage2 (imsect, title, xlabel, ylabel, xformat, x, y, size,
axis, wcs)
char imsect[ARB] # Image section to be plotted
char title[ARB] # Image title
char xlabel[ARB] # Coordinate label
char ylabel[ARB] # Pixel value label
char xformat[ARB] # WCS coordinate format
pointer x, y, size # Pointer to x, y and size vector
int axis # Axis about which the projection is to be taken
char wcs[ARB] # WCS type
int npix, i, stridxs()
pointer sp, im, mw, ct, axvals, str
pointer immap(), mw_openim(), mw_sctran()
errchk immap, im_projection, malloc, mw_openim, mw_sctran, plt_wcs
begin
call smark (sp)
call salloc (axvals, IM_MAXDIM, TY_REAL)
call salloc (str, SZ_FNAME, TY_CHAR)
im = immap (imsect, READ_ONLY, 0)
if (axis < 1 || axis > IM_NDIM(im))
call error (2, "Attempt to take projection over nonexistent axis")
npix = IM_LEN(im,axis)
call malloc (y, npix, TY_REAL)
call im_projection (im, Memr[y], npix, axis)
iferr {
call malloc (x, npix, TY_REAL)
call malloc (size, npix, TY_REAL)
} then
call erract (EA_FATAL)
# Set title if not previously defined
if (title[1] == EOS) {
call strcpy (IM_TITLE(im), title, SZ_LINE)
if (stridxs ("\n", title) == 0)
call strcat ("\n", title, SZ_LINE)
call imgsection (imsect, Memc[str], SZ_LINE)
if (Memc[str] != EOS)
call strcat (Memc[str], title, SZ_LINE)
}
# Set WCS coordinates
mw = mw_openim (im)
call mw_seti (mw, MW_USEAXMAP, NO)
ct = mw_sctran (mw, "logical", wcs, 0)
call strcpy (wcs, Memc[str], SZ_LINE)
do i = 1, IM_NDIM(im)
Memr[axvals+i-1] = (1 + IM_LEN(im, i)) / 2.
call plt_wcs (im, mw, ct, axis, Memr[axvals], 1., real(npix), Memr[x],
npix, Memc[str], xformat, SZ_FNAME)
if (xlabel[1] == EOS)
call strcpy (Memc[str], xlabel, SZ_LINE)
call mw_close (mw)
call imunmap (im)
call sfree (sp)
return (npix)
end
# GG_RDLIST2 -- Read a list of two dimensional data pairs into two type
# real arrays in memory. Return pointers to the arrays and a count of the
# number of pixels. If mark sizes are to be read from the input list,
# a third array of mark sizes is returned. Mark sizes can only be given
# in two column (x,y) mode, with the mark size given as a third column.
int procedure gg_rdlist2 (fname, x, y, size, rdmarks)
char fname[ARB] # Name of list file
pointer x, y, size # Pointers to x, y and size vectors
bool rdmarks # Read markers from file?
int buflen, n, fd, ncols, lineno
pointer sp, lbuf, ip
real xval, yval, szmark
int getline(), nscan(), open()
errchk open, sscan, getline, malloc
begin
call smark (sp)
call salloc (lbuf, SZ_LINE, TY_CHAR)
fd = open (fname, READ_ONLY, TEXT_FILE)
buflen = SZ_BUF
iferr {
call malloc (x, buflen, TY_REAL)
call malloc (y, buflen, TY_REAL)
call malloc (size, buflen, TY_REAL)
} then
call erract (EA_FATAL)
n = 0
ncols = 0
lineno = 0
szmark = 1E-2
while (getline (fd, Memc[lbuf]) != EOF) {
# Skip comment lines and blank lines.
lineno = lineno + 1
if (Memc[lbuf] == '#')
next
for (ip=lbuf; IS_WHITE(Memc[ip]); ip=ip+1)
;
if (Memc[ip] == '\n' || Memc[ip] == EOS)
next
# Decode the points to be plotted.
call sscan (Memc[ip])
call gargr (xval)
call gargr (yval)
if (rdmarks)
call gargr (szmark)
# The first line determines whether we have an x,y list or a
# y-list. It is an error if only one value can be decoded when
# processing a two column list.
if (ncols == 0 && nscan() > 0)
ncols = nscan()
switch (nscan()) {
case 0:
call eprintf ("no args; %s, line %d: %s\n")
call pargstr (fname)
call pargi (lineno)
call pargstr (Memc[lbuf])
next
case 1:
if (ncols == 2) {
call eprintf ("only 1 arg; %s, line %d: %s\n")
call pargstr (fname)
call pargi (lineno)
call pargstr (Memc[lbuf])
next
} else {
yval = xval
xval = n + 1.0
}
case 2:
if (rdmarks) {
call eprintf ("no szmark field; %s, line %d: %s\n")
call pargstr (fname)
call pargi (lineno)
call pargstr (Memc[lbuf])
szmark = 1E-2
}
}
n = n + 1
if (n > buflen) {
buflen = buflen + SZ_BUF
call realloc (x, buflen, TY_REAL)
call realloc (y, buflen, TY_REAL)
call realloc (size, buflen, TY_REAL)
}
Memr[x+n-1] = xval
Memr[y+n-1] = yval
if (rdmarks)
Memr[size+n-1] = szmark
}
call realloc (x, n, TY_REAL)
call realloc (y, n, TY_REAL)
call realloc (size, n, TY_REAL)
call close (fd)
call sfree (sp)
return (n)
end
# GG_LINTRAN -- Linearly transform a vector. Map pixel values P1,P2
# onto Q1,Q2.
procedure gg_lintran (x, npix, p1in, p2in, q1, q2)
real x[npix] # Vector to transform
int npix # Number of pixels in vector
real p1in, p2in # Range of input values to map
real q1, q2 # Range for output values
real p1, p2
real xscale
begin
# If P1 and P2 are not set, use full range of input pixels indices.
if (p1in == 0 && p2in == 0) {
p1 = 1.0
p2 = npix
} else {
p1 = p1in
p2 = p2in
}
if (p2 - p1 == 0)
xscale = (q2 - q1)
else
xscale = (q2 - q1) / (p2 - p1)
call asubkr (x, p1, x, npix)
call amulkr (x, xscale, x, npix)
call aaddkr (x, q1, x, npix)
end
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