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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <error.h>
include <gki.h>
# IMDKERN -- Graphics kernel for an image display frame buffer using the
# data stream interface. The package is based on the SGI kernel.
procedure t_imdkern()
int fd, list, dbfd
pointer gki, sp, fname, devname, dbfname
int dev[LEN_GKIDD], deb[LEN_GKIDD]
int debug, verbose, gkiunits
int color, frame
bool clgetb()
int clgeti(), envfind()
int clpopni(), clgfil(), open(), btoi()
int gki_fetch_next_instruction()
begin
call smark (sp)
call salloc (fname, SZ_FNAME, TY_CHAR)
call salloc (devname, SZ_FNAME, TY_CHAR)
call salloc (dbfname, SZ_PATHNAME, TY_CHAR)
# Open list of metafiles to be decoded.
list = clpopni ("input")
# Set parameter defaults.
debug = NO
verbose = NO
gkiunits = NO
frame = -1
color = -1
# Check for global kernel debug flag.
if (envfind ("idkdebug", Memc[dbfname], SZ_PATHNAME) > 0)
iferr (dbfd = open (Memc[dbfname], APPEND, TEXT_FILE)) {
debug = NO
dbfd = 0
} else
debug = YES
# Get parameters.
call clgstr ("device", Memc[devname], SZ_FNAME)
if (!clgetb ("generic")) {
debug = btoi (clgetb ("debug"))
verbose = btoi (clgetb ("verbose"))
gkiunits = btoi (clgetb ("gkiunits"))
frame = clgeti ("frame")
color = clgeti ("color")
}
if (debug == YES && dbfd == 0)
dbfd = STDERR
# Open the graphics kernel.
call imd_opendev (Memc[devname], frame, color, dev)
call gkp_install (deb, dbfd, verbose, gkiunits)
# Process a list of metacode files, writing the decoded metacode
# instructions on the standard output.
while (clgfil (list, Memc[fname], SZ_FNAME) != EOF) {
# Open input file.
iferr (fd = open (Memc[fname], READ_ONLY, BINARY_FILE)) {
call erract (EA_WARN)
next
}
# Process the metacode instruction stream.
while (gki_fetch_next_instruction (fd, gki) != EOF) {
if (debug == YES) {
call gki_execute (Mems[gki], deb)
call flush (dbfd)
}
call gki_execute (Mems[gki], dev)
}
call close (fd)
}
call gkp_close()
call imd_close()
call clpcls (list)
call sfree (sp)
end
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