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include <error.h>
include <mach.h>
include <evvexpr.h>
include <fset.h>
include "../import.h"
include "../ipfcn.h"
define DEBUG false
define VDEBUG false
# IP_GETOP -- Called by evvexpr to get an operand.
procedure ip_getop (ip, opname, o)
pointer ip #i task struct pointer
char opname[ARB] #i operand name to retrieve
pointer o #o output operand pointer
int i, nops, found, optype
pointer sp, buf
pointer op
int fstati(), ip_ptype(), strlen(), strncmp()
bool streq()
begin
# First see if it's one of the special file operands.
if (opname[1] == '$') {
if (strncmp(opname, "$FSIZE", 3) == 0) {
O_LEN(o) = 0
O_TYPE(o) = TY_INT
O_VALI(o) = fstati (IP_FD(ip), F_FILESIZE) * SZB_CHAR
} else if (strncmp(opname, "$FNAME", 3) == 0) {
call smark (sp)
call salloc (buf, SZ_FNAME, TY_CHAR)
call fstats (IP_FD(ip), F_FILENAME, Memc[buf], SZ_FNAME)
O_TYPE(o) = TY_CHAR
O_LEN(o) = strlen (Memc[buf]) + 1
call malloc (O_VALP(o), O_LEN(o), TY_CHAR)
call strcpy (Memc[buf], O_VALC(o), i)
call sfree (sp)
}
return
}
nops = IP_NPIXT(ip)
found = NO
do i = 1, nops {
# Search for operand name which matches requested value.
op = PTYPE(ip,i)
if (streq (Memc[IO_TAG(op)],opname)) {
found = YES
break
}
}
if (VDEBUG) {
call eprintf ("getop: opname=%s tag=%s found=%d ")
call pargstr(opname) ; call pargstr(Memc[IO_TAG(op)])
call pargi(found)
if (found == YES) call zzi_prop (op)
}
if (found == YES) {
# Copy operand descriptor to 'o'
optype = ip_ptype (IO_TYPE(op), IO_NBYTES(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 smark (sp)
call salloc (buf, SZ_LINE, TY_CHAR)
call sprintf (Memc[buf], SZ_LINE, "Unknown outbands operand `%s'\n")
call pargstr(opname)
call sfree (sp)
call error (1, Memc[buf])
}
end
# IP_EVALUATE -- Evaluate the outbands expression.
pointer procedure ip_evaluate (ip, expr)
pointer ip #i task struct pointer
char expr[ARB] #i expression to be evaluated
pointer o # operand pointer to result
int locpr()
pointer evvexpr()
extern ip_getop(), ip_obfcn()
errchk evvexpr
begin
if (DEBUG) { call eprintf("ip_eval: expr='%s'\n") ; call pargstr(expr) }
# Evaluate the expression.
iferr {
o = evvexpr (expr, locpr(ip_getop), ip, locpr(ip_obfcn), ip,
EV_RNGCHK)
} then
call erract (EA_FATAL)
return (o)
end
# IP_OBFCN -- Called by evvexpr to execute import outbands special functions.
procedure ip_obfcn (ip, fcn, args, nargs, o)
pointer ip #i task struct 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, color, cmap
int i, len, v_nargs, func
int or(), strdic()
bool 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 FLIPX, FLIPY:
v_nargs = 1
case RED, GREEN, BLUE:
v_nargs = 1
}
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 zzi_pevop (args[i]) }
call flush (STDERR)
}
# Evaluate the function.
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 RED:
# Get the red colormap component of the image.
cmap = IP_CMAP(ip)
if (func <= 0)
call xev_error1 ("No colormap in image for function `%s'", fcn)
r = O_VALP(args[1])
len = O_LEN(args[1]) - 1
O_LEN(o) = len + 1
O_TYPE(o) = TY_SHORT
call malloc (O_VALP(o), len+1, TY_SHORT)
color = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
do i = 0, len
Mems[color+i] = CMAP(cmap,IP_RED,Mems[r+i]+1)
$for (il)
case TY_PIXEL:
do i = 0, len
Mems[color+i] = CMAP(cmap,IP_RED,Mem$t[r+i]+1)
$endfor
}
case GREEN:
# Get the blue colormap component of the image.
cmap = IP_CMAP(ip)
if (func <= 0)
call xev_error1 ("No colormap in image for function `%s'", fcn)
g = O_VALP(args[1])
len = O_LEN(args[1]) - 1
O_LEN(o) = len + 1
O_TYPE(o) = TY_SHORT
call malloc (O_VALP(o), len+1, TY_SHORT)
color = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
do i = 0, len
Mems[color+i] = CMAP(cmap,IP_GREEN,Mems[g+i]+1)
$for (il)
case TY_PIXEL:
do i = 0, len
Mems[color+i] = CMAP(cmap,IP_GREEN,char(Mem$t[g+i]+1))
$endfor
}
case BLUE:
# Get the blue colormap component of the image.
cmap = IP_CMAP(ip)
if (func <= 0)
call xev_error1 ("No colormap in image for function `%s'", fcn)
b = O_VALP(args[1])
len = O_LEN(args[1]) - 1
O_LEN(o) = len + 1
O_TYPE(o) = TY_SHORT
call malloc (O_VALP(o), len+1, TY_SHORT)
color = O_VALP(o)
switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
do i = 0, len
Mems[color+i] = CMAP(cmap,IP_BLUE,Mems[b+i]+1)
$for (il)
case TY_PIXEL:
do i = 0, len
Mems[color+i] = CMAP(cmap,IP_BLUE,char(Mem$t[b+i]+1))
$endfor
}
case FLIPX:
# Set flag to reverse pixel order on output.
IP_FLIP(ip) = or (IP_FLIP(ip), FLIP_X)
goto setop_
case FLIPY:
# Set flag to write image from bottom to top.
IP_FLIP(ip) = or (IP_FLIP(ip), FLIP_Y)
# Copy argument operand descriptor to 'o'
setop_ switch (O_TYPE(args[1])) {
case TY_UBYTE, TY_USHORT, TY_SHORT:
O_LEN(o) = O_LEN(args[1])
O_TYPE(o) = TY_SHORT
call malloc (O_VALP(o), O_LEN(args[1]), TY_SHORT)
call amovs (Mems[O_VALP(ARGS[1])], Mems[O_VALP(o)], O_LEN(o))
$for (ilrd)
case TY_PIXEL:
O_LEN(o) = O_LEN(args[1])
O_TYPE(o) = TY_PIXEL
call malloc (O_VALP(o), O_LEN(args[1]), TY_PIXEL)
call amov$t (Mem$t[O_VALP(args[1])], Mem$t[O_VALP(o)], O_LEN(o))
$endfor
}
}
if (DEBUG) { call zzi_pevop (o) }
call sfree (sp)
end
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