# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3 or higher
# as published by the Free Software Foundation.
use IO::Socket;
use Text::Balanced;
if ($ENV{'RFXGIMP_PORT'}) {
$rfx_port = $ENV{'RFXGIMP_PORT'};
}
else {
$rfx_port = 10008;
}
$sock = new IO::Socket::INET ( PeerAddr => 'localhost',
PeerPort => $rfx_port,
Proto => 'tcp'
);
if ( not defined $sock ) {
my $rfx_pid = fork();
if (not defined $rfx_pid) {
&sig_error("UNABLE TO EXECUTE GIMP: Not enough resources");
}
elsif ($rfx_pid == 0) {
if ( -f $tmpdir . "rfxgimp.pid") {
open(PIDFILE, $tmpdir . "rfxgimp.pid");
# should probably do some sanity checking for the off chance that
# the PID has been recycled or the system has rebooted (e.g, check
# if process was executed with /usr/bin/perl. But for now...
kill(15, -<PIDFILE>); # the negative PID means kill all children, too.
close(PIDFILE);
}
setpgid($$,0); # change the pgroup to this forked process, rather than
# the original LiVES (so that we don't kill LiVES when
# this prgroup is killed).
open(PIDFILE, ">" . $tmpdir . "rfxgimp.pid"); # overwrite old file
print PIDFILE $$;
close(PIDFILE);
my $start_gimp = qq{ gimp -i -b "(plug-in-script-fu-server 1 $rfx_port \\\"\\\")" & };
system ( $start_gimp ); # though started as separate process, GIMP now
# is part of this spawned child's pgroup, not the LiVES pgroup
sleep(); # do nothing, forever
&sig_error("GIMP killed by external process\n");
}
else {
while (not defined $sock) {
sleep (1);
$sock = new IO::Socket::INET ( PeerAddr => 'localhost',
PeerPort => $rfx_port,
Proto => 'tcp'
);
}
}
}
# Define a Perl subroutine for sending messages to the SF server and waiting
# for a response.
#
sub rfx_sendmsg {
my $message = $_[0];
my $len = length ($message);
if ($len > 65535) {
&sig_error("ERROR: script is too long for one server request: $len > 65535");
};
# send script to GIMP
my $header = pack( 'an', 'G', $len);
syswrite( $sock, $_ ) for ($header, $message);
# wait for response
my $rin = '';
vec( $rin, fileno($sock), 1 ) = 1;
select( $rin, undef, undef, undef ); # wait (forever) for response start
select( undef, undef, undef, .1 ); # wait a bit for response to finish
# increase wait if INVALID/INCOMPLETE RESPONSE occurs
# response
$len = sysread( $sock, $header, 4 ) or &sig_error("INVALID RESPONSE: empty response");
( $len == 4 and $header =~ /^G/ ) or &sig_error("INVALID RESPONSE: bad header");
my $status;
($status, $len) = unpack( 'xCn', $header );
my $response;
( sysread( $sock, $response, $len ) == $len ) or &sig_error("INCOMPLETE RESPONSE: $response");
# exit if response is not "Success"
if ( $status and $response =~ /^Error: Success\n/i ) {
&sig_error("UNSUCCESSFUL EXECUTION: Script-fu error");
}
$status;
}
# define a Script-fu utility function to save frames using the PNG or JPG
# compression levels specified in 'gimprc'.
# To specify a PNG compression level of 5, include the following line
# in gimprc:
# (rfx-png-compression "5")
# If not specified then a default level of "3" is assumed.
# "3" is a good choice for PNGs because higher levels double the write
# times while only offering about 15% reduction in file size.
# To specify a JPG compression level of 85, include the following line
# in gimprc:
# (rfx-jpg-compression "85")
# If not specified then a default level of "93" is assumed.
# NOTE: 'rfx-save-frame' DELETES the image.
&rfx_sendmsg( qq{
(begin
(define rfx-curtmpdir "$curtmpdir")
(define rfx-imgext "$img_ext")
(unless (defined? 'rfx-save-frame)
(define rfx-png-compression (catch #f (gimp-gimprc-query "rfx-png-compression")))
(set! rfx-png-compression (if rfx-png-compression
(string->number (car rfx-png-compression))
3 ))
(define rfx-jpg-compression (catch #f (gimp-gimprc-query "rfx-jpg-compression")))
(set! rfx-jpg-compression (if rfx-jpg-compression
(string->number (car rfx-jpg-compression))
93 ))
(define (rfx-save-frame image basename)
(let ((filename (string-append rfx-curtmpdir DIR-SEPARATOR basename))
(layer (car (gimp-image-get-active-layer image))) )
(if (string-ci=? rfx-imgext ".jpg")
(begin
(gimp-context-push)
(gimp-context-set-background '(6 6 6))
(let loop ((layers (vector->list (cadr (gimp-image-get-layers image)))))
(unless (null? layers)
(if (= (car layers) layer)
(gimp-drawable-set-visible layer TRUE)
(gimp-drawable-set-visible (car layers) FALSE) )
(loop (cdr layers)) ))
(set! layer (car (gimp-image-flatten image)))
(file-jpeg-save RUN-NONINTERACTIVE
image
layer
filename
filename
(/ rfx-jpg-compression 100)
0 ; smoothing
1 ; optimize
1 ; progressive
"" ; comment
0 ; subsmp (0-4)
1 ; baseline
0 ; restart
0 ;dct
)
(gimp-context-pop) )
(begin
(unless (zero? (car (gimp-image-base-type image)))
(gimp-image-convert-rgb image) )
(file-png-save2 RUN-NONINTERACTIVE
image
layer
filename
filename
FALSE ; interlace
rfx-png-compression
FALSE ; bkgd
(car (gimp-drawable-has-alpha layer))
FALSE ; offs
FALSE ; phys
FALSE ; time
TRUE ; comment
FALSE ; svtrans
)))
(gimp-image-delete image) )))
(define (multiply-layers image lis)
(let* ((new-layers (map (lambda (x) (car (gimp-layer-copy x FALSE)))
lis )) )
(gimp-image-add-layer image (car new-layers) -1)
(let loop ((layers (cdr new-layers))
(new-layer (car new-layers)) )
(if (null? layers)
new-layer
(begin
(gimp-image-add-layer image (car layers) -1)
(gimp-layer-set-mode (car layers) MULTIPLY-MODE)
(loop (cdr layers)
(car (gimp-image-merge-down image
(car layers)
EXPAND-AS-NECESSARY )))))))))
}
);