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|
include <error.h>
include <mach.h>
include <evvexpr.h>
include <fset.h>
include <ctype.h>
include "../export.h"
include "../exfcn.h"
define DEBUG false
define VDEBUG false
# EX_EVALUATE -- Evaluate the outbands expression.
pointer procedure ex_evaluate (ex, expr)
pointer ex #i task struct pointer
char expr[ARB] #i expression to be evaluated
pointer o # operand pointer to result
int locpr()
pointer evvexpr()
extern ex_getop(), ex_obfcn()
errchk evvexpr
begin
if (DEBUG) { call eprintf("ex_eval: expr='%s'\n") ; call pargstr(expr) }
# Evaluate the expression.
iferr {
o = evvexpr (expr, locpr(ex_getop), ex, locpr(ex_obfcn), ex,
EV_RNGCHK)
} then
call erract (EA_FATAL)
return (o)
end
# EX_GETOP -- Called by evvexpr to get an operand.
procedure ex_getop (ex, opname, o)
pointer ex #i task struct pointer
char opname[ARB] #i operand name to retrieve
pointer o #o output operand pointer
int i, nops, found, optype, imnum
pointer sp, buf
pointer op, param, emsg
pointer im
#int ex_ptype()
int imgeti(), imgftype(), btoi(), ctoi()
bool streq(), imgetb()
double imgetd()
define getpar_ 99
begin
call smark (sp)
call salloc (buf, SZ_LINE, TY_CHAR)
call salloc (param, SZ_FNAME, TY_CHAR)
call salloc (emsg, SZ_LINE, TY_CHAR)
call aclrc (Memc[buf], SZ_LINE)
call aclrc (Memc[param], SZ_FNAME)
call aclrc (Memc[emsg], SZ_LINE)
if (VDEBUG) { call eprintf ("getop: opname=%s ");call pargstr(opname)}
# First see if it's one of the special image operands that was
# referenced in an "@param" call.
if (((opname[1] != 'i' && opname[1] != 'b') && !IS_DIGIT(opname[2])) ||
(opname[1] == 'i' && opname[2] == '_')) {
call strcpy (opname, Memc[param], SZ_FNAME)
im = IO_IMPTR(IMOP(ex,1))
getpar_ O_LEN(o) = 0
switch (imgftype (im, Memc[param])) {
case TY_BOOL:
O_TYPE(o) = TY_BOOL
O_VALI(o) = btoi (imgetb (im, Memc[param]))
case TY_CHAR:
O_TYPE(o) = TY_CHAR
O_LEN(o) = SZ_LINE
call malloc (O_VALP(o), SZ_LINE, TY_CHAR)
call imgstr (im, Memc[param], O_VALC(o), SZ_LINE)
case TY_INT:
O_TYPE(o) = TY_INT
O_VALI(o) = imgeti (im, Memc[param])
case TY_REAL:
O_TYPE(o) = TY_DOUBLE
O_VALD(o) = imgetd (im, Memc[param])
default:
call sprintf (Memc[emsg], SZ_LINE, "param %s not found\n")
call pargstr (Memc[param])
call error (6, Memc[emsg])
}
call sfree (sp)
return
} else if (IS_LOWER(opname[1]) && opname[3] == '.') {
# This is a tag.param operand. Break out the image tag name and
# get the image pointer for it, then get the parameter
if (opname[1] == 'b') { # band of 3-D image, only 1 ptr
imnum = 1
} else if (opname[1] == 'i') { # image descriptor
i = 2
if (ctoi (opname, i, imnum) == 0)
call error (6, "can't parse operand")
} else {
call sprintf (Memc[buf], SZ_LINE,
"Unknown outbands operand `%s'\n")
call pargstr(opname)
call error (1, Memc[buf])
}
# Get the parameter value.
im = IO_IMPTR(IMOP(ex,imnum))
call strcpy (opname[4], Memc[param], SZ_FNAME)
goto getpar_
}
nops = EX_NIMOPS(ex)
found = NO
do i = 1, nops {
# Search for operand name which matches requested value.
op = IMOP(ex,i)
if (streq (Memc[IO_TAG(op)],opname)) {
found = YES
break
}
}
if (VDEBUG && found == YES) {
call eprintf (" tag=%s found=%d ")
call pargstr(Memc[IO_TAG(op)]) ; call pargi(found)
call zze_prop (op)
}
if (found == YES) {
# Copy operand descriptor to 'o'
#optype = ex_ptype (IO_TYPE(op), IO_NBYTES(op))
optype = IO_TYPE(op)
switch (optype) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
O_LEN(o) = IO_NPIX(op)
O_TYPE(o) = TY_SHORT
call malloc (O_VALP(o), IO_NPIX(op), TY_SHORT)
call amovs (Mems[IO_DATA(op)], Mems[O_VALP(o)], IO_NPIX(op))
$for (ilrd)
case TY_PIXEL:
O_LEN(o) = IO_NPIX(op)
O_TYPE(o) = TY_PIXEL
call malloc (O_VALP(o), IO_NPIX(op), TY_PIXEL)
call amov$t (Mem$t[IO_DATA(op)], Mem$t[O_VALP(o)], IO_NPIX(op))
$endfor
}
} else {
call sprintf (Memc[buf], SZ_LINE, "Unknown outbands operand `%s'\n")
call pargstr(opname)
call error (1, Memc[buf])
}
call sfree (sp)
end
# EX_OBFCN -- Called by evvexpr to execute import outbands special functions.
procedure ex_obfcn (ex, fcn, args, nargs, o)
pointer ex #i package pointer
char fcn[ARB] #i function to be executed
pointer args[ARB] #i argument list
int nargs #i number of arguments
pointer o #o operand pointer
pointer sp, buf
pointer r, g, b, gray
pointer scaled, data
int i, len, v_nargs, func, nbins
short sz1, sz2, sb1, sb2, zero
real gamma, bscale, bzero, scale, pix
real z1, z2
int strdic()
bool fp_equalr(), strne()
define setop_ 99
begin
call smark (sp)
call salloc (buf, SZ_FNAME, TY_CHAR)
# Lookup function in dictionary.
func = strdic (fcn, Memc[buf], SZ_LINE, OB_FUNCTIONS)
if (func > 0 && strne(fcn,Memc[buf]))
func = 0
# Abort if the function is not known.
if (func <= 0)
call xev_error1 ("unknown function `%s' called", fcn)
# Verify the correct number of arguments, negative value means a
# variable number of args, handle it in the evaluation.
switch (func) {
case GRAY, GREY:
v_nargs = 3
case ZSCALE:
v_nargs = -1
case BSCALE:
v_nargs = 3
case GAMMA:
v_nargs = -1
case BLOCK:
v_nargs = 3
}
if (v_nargs > 0 && nargs != v_nargs)
call xev_error2 ("function `%s' requires %d arguments",
fcn, v_nargs)
else if (v_nargs < 0 && nargs < abs(v_nargs))
call xev_error2 ("function `%s' requires at least %d arguments",
fcn, abs(v_nargs))
if (DEBUG) {
call eprintf ("obfcn: nargs=%d func=%d\n")
call pargi (nargs) ; call pargi (func)
do i = 1, nargs { call eprintf ("\t") ; call zze_pevop (args[i]) }
call flush (STDERR)
}
# Evaluate the function.
zero = 0
switch (func) {
case GRAY, GREY:
# evaluate expression for NTSC grayscale.
r = O_VALP(args[1])
g = O_VALP(args[2])
b = O_VALP(args[3])
len = O_LEN(args[1]) - 1
O_LEN(o) = len + 1
O_TYPE(o) = TY_REAL
call malloc (O_VALP(o), len+1, TY_REAL)
gray = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
do i = 0, len {
Memr[gray+i] = R_COEFF * Mems[r+i] +
G_COEFF * Mems[g+i] +
B_COEFF * Mems[b+i]
}
$for (ilrd)
case TY_PIXEL:
do i = 0, len {
Memr[gray+i] = R_COEFF * Mem$t[r+i] +
G_COEFF * Mem$t[g+i] +
B_COEFF * Mem$t[b+i]
}
$endfor
}
case ZSCALE:
data = O_VALP(args[1])
switch (O_TYPE(args[2])) {
case TY_SHORT: z1 = O_VALS(args[2])
case TY_INT: z1 = O_VALI(args[2])
case TY_LONG: z1 = O_VALL(args[2])
case TY_REAL: z1 = O_VALR(args[2])
case TY_DOUBLE: z1 = O_VALD(args[2])
}
switch (O_TYPE(args[3])) {
case TY_SHORT: z2 = O_VALS(args[3])
case TY_INT: z2 = O_VALI(args[3])
case TY_LONG: z2 = O_VALL(args[3])
case TY_REAL: z2 = O_VALR(args[3])
case TY_DOUBLE: z2 = O_VALD(args[3])
}
if (nargs < 4)
nbins = 256
else
nbins = O_VALI(args[4])
len = O_LEN(args[1])
O_LEN(o) = len
O_TYPE(o) = O_TYPE(args[1])
call malloc (O_VALP(o), len, O_TYPE(args[1]))
scaled = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
sz1 = z1
sz2 = z2
sb1 = 0
sb2 = nbins - 1
if (abs(sz2-sz1) > 1.0e-5)
call amaps (Mems[data], Mems[scaled], len, sz1, sz2,
sb1, sb2)
else
call amovks (0, Mems[scaled], len)
$for (ilrd)
case TY_PIXEL:
if (abs(z2-z1) > 1.0e-5)
call amap$t (Mem$t[data], Mem$t[scaled], len, PIXEL (z1),
PIXEL(z2), PIXEL (0), PIXEL (nbins-1))
else
call amovk$t (PIXEL (0), Mem$t[scaled], len)
$endfor
}
case BSCALE:
data = O_VALP(args[1])
bzero = O_VALR(args[2])
bscale = O_VALR(args[3])
len = O_LEN(args[1]) - 1
O_LEN(o) = len + 1
O_TYPE(o) = TY_REAL
call malloc (O_VALP(o), len+1, TY_REAL)
scaled = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
if (!fp_equalr (0.0, bscale)) {
do i = 0, len
Memr[scaled+i] = (Mems[data+i] - bzero) / bscale
} else
call amovks (zero, Mems[scaled], len)
$for (ilrd)
case TY_PIXEL:
if (!fp_equalr (0.0, bscale)) {
do i = 0, len
Memr[scaled+i] = (Mem$t[data+i] - bzero) / bscale
} else
call amovk$t (PIXEL(0), Mem$t[scaled], len)
$endfor
}
case GAMMA:
data = O_VALP(args[1])
gamma = 1.0 / O_VALR(args[2])
if (nargs == 3)
scale = max (1.0, O_VALR(args[3]))
else
scale = 255.0
len = O_LEN(args[1]) - 1
O_LEN(o) = len + 1
O_TYPE(o) = TY_REAL
call malloc (O_VALP(o), len+1, TY_REAL)
scaled = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
do i = 0, len {
pix = max (zero, Mems[data+i])
Memr[scaled+i] = scale * ((pix/scale) ** gamma)
}
$for (ilrd)
case TY_PIXEL:
do i = 0, len {
pix = max (PIXEL(0), Mem$t[data+i])
Memr[scaled+i] = scale * ((pix/scale) ** gamma)
}
$endfor
}
case BLOCK:
len = O_VALI(args[2])
O_LEN(o) = len
O_TYPE(o) = O_TYPE(args[1])
call malloc (O_VALP(o), len, O_TYPE(args[1]))
scaled = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
call amovks (O_VALS(args[1]), Mems[scaled], len)
case TY_INT:
call amovki (O_VALI(args[1]), Memi[scaled], len)
case TY_LONG:
call amovkl (O_VALL(args[1]), Meml[scaled], len)
case TY_REAL:
call amovkr (O_VALR(args[1]), Memr[scaled], len)
case TY_DOUBLE:
call amovkd (O_VALD(args[1]), Memd[scaled], len)
}
}
if (DEBUG) { call zze_pevop (o) }
call sfree (sp)
end
|
