-#!/bin/sh
-#
-# vidwhacker, for xscreensaver. Copyright (c) 1998, 1999 Jamie Zawinski.
+#!/usr/bin/perl -w
+# vidwhacker, for xscreensaver. Copyright (c) 1998-2001 Jamie Zawinski.
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# software for any purpose. It is provided "as is" without express or
# implied warranty.
#
-#
-# This script grabs a frame of video, then uses various pbm filters to
+# This program grabs a frame of video, then uses various pbm filters to
# munge the image in random nefarious ways, then uses xloadimage, xli, or xv
# to put it on the root window. This works out really nicely if you just
# feed some random TV station into it...
#
-# The video grabbing part is SGI-specific -- if you want to use this on
-# another system, add a new clause to the grab() procedure.
-
-
-# need perl to generate random numbers -- I don't know another way to do
-# that from a shell script.
-perl=perl
-
-
-onroot=false
-verbose=false
-delay=3
-use_stdin=false
-use_stdout=false
-
-pid=""
-tmp=${TMPDIR:-/tmp}/vidwhacker.$$
-tmp_rgb=$tmp-00000.rgb
-tmp_ppm0=$tmp-0.ppm
-tmp_ppm1=$tmp-1.ppm
-tmp_ppm2=$tmp-2.ppm
-tmp_ppm3=$tmp-3.ppm
-tmp_ppm4=$tmp-4.ppm
-tmp_ppmS=$tmp-S.ppm
-
-
-# Figure out whether to use xloadimage, xli, or xv.
-pick_displayer() {
- displayer=
- for prog in xloadimage xli xv ; do
- IFS=:
- for p in $PATH; do
- IFS=
- if [ "$p" = "" ]; then p=. ; fi
- if [ -x $p/$prog ]; then
- displayer=$prog
- break 2
- fi
- done
- done
-
- if [ "$displayer" = "xloadimage" ]; then
- displayer_args="-quiet"
- displayer_win_args=""
- displayer_root_args="-onroot"
- elif [ "$displayer" = "xli" ]; then
- displayer_args="-quiet"
- displayer_win_args=""
- displayer_root_args="-onroot -center -border black"
- elif [ "$displayer" = "xv" ]; then
- displayer_args="-quick24"
- displayer_win_args="-geom +0+0"
- displayer_root_args="-root -rmode 5 -noresetroot -rfg black -rbg black -viewonly"
- else
- echo "$0: neither xli nor xv found on \$PATH"
- exit -1
- fi
-}
+# Created: 14-Apr-01.
-# Process command-line args
-getargs() {
-
- while [ $# != 0 ]; do
- case "$1" in
- -display | -disp | -dis | -dpy | -d )
- shift
- DISPLAY="$1"
- export DISPLAY
- ;;
- -root )
- onroot=true
- ;;
- -window )
- onroot=false
- ;;
- -verbose )
- verbose=true
- ;;
- -stdin )
- use_stdin=true
- ;;
- -stdout )
- use_stdout=true
- ;;
- -delay)
- shift
- delay="$1"
- ;;
- * )
- echo "VidWhacker, Copyright (c) 1999 Jamie Zawinski <jwz@jwz.org>" >&2
- echo " http://www.jwz.org/xscreensaver/" >&2
- echo "" >&2
- echo "usage: $0 [-display dpy] [-verbose] [-root | -window]" >&2
- echo " [-stdin] [-stdout] [-delay secs]" >&2
- exit 1
- ;;
- esac
- shift
- done
-
- pick_displayer
-
- if [ "$onroot" = true ]; then
- displayer_args="$displayer_args $displayer_root_args"
- else
- displayer_args="$displayer_args $displayer_win_args"
- fi
-
-
- screen_width=''
- if [ "$use_stdout" = false ]; then
- screen_width=`xdpyinfo 2>/dev/null |
- sed -n 's/.* dimensions: *\([0-9]*\).*/\1/p'`
- if [ "$screen_width" = "" ]; then
- screen_width=800
- fi
- fi
-}
+require 5;
+use diagnostics;
+use strict;
+my $progname = $0; $progname =~ s@.*/@@g;
+my $version = q{ $Revision: 1.17 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
-clean() {
- rm -f $tmp_rgb $tmp_ppm1 $tmp_ppm2 $tmp_ppm3 $tmp_ppm4
-}
+my $verbose = 0;
+my $use_stdin = 0;
+my $use_stdout = 0;
+my $video_p = 0;
+my $file_p = 1;
+my $delay = 5;
+my $imagedir;
-clean2() {
- clean
- rm -f $tmp_ppm0 $tmp_ppmS
-}
+my $screen_width = -1;
-# Grab a frame of video. leaves it in $tmp_ppm1.
+
+# #### This list was lifted from driver/xscreensaver-getimage-file
#
-grab() {
- uname=`uname`
- if [ $uname = IRIX ]; then
- #
- # SGI's "vidtomem" returns an SGI RGB image of the default video input,
- # and has stupid non-overridable ouput-file-naming conventions. So, let
- # it write its file; and then convert it to a pgm.
- #
-
- vidtomem -f $tmp
- sgitopnm $tmp_rgb > $tmp_ppm1
-
- # Cut off the close-captioning blips in the NTSC overscan region. YMMV.
- # | pnmcut 12 7 695 477
-
- elif [ $uname = Linux ]; then
-
- # Marcus Herbert says the following works with his Connectix Qcam.
- # Don't have qcam? Well, do something else then... and send me a patch.
-
- qcam > $tmp_ppm1
-
- # Friedrich Delgado Friedrichs says the following works if you have
- # XawTV installed:
- #
- # streamer -o $tmp_ppm1
- #
-
- # James Isaacs says this works for the ATI video capture card:
- #
- # atitv snap $tmp_ppm1
- #
-
- else
- echo "$0: don't know how to grab video on this OS." >&2
- clean2
- exit 1
- fi
-}
+# These are programs that can be used to put an image file on the root
+# window (including virtual root windows.) The first one of these programs
+# that exists on $PATH will be used (with the file name as the last arg.)
+#
+# If you add other programs to this list, please let me know!
+#
+my @displayer_programs = (
+ "xv -root -quit -viewonly -maxpect -noresetroot -quick24 -rmode 5" .
+ " -rfg black -rbg black",
+ "xli -quiet -fullscreen -onroot -center -border black",
+ "xloadimage -quiet -fullscreen -onroot -center -border black",
+ "chbg -once -xscreensaver -max_grow 4",
+
+# this lame program wasn't built with vroot.h:
+# "xsri -scale -keep-aspect -center-horizontal -center-vertical",
+);
-# Use perl to pick a random foreground/background color in pbm's syntax.
+# List of interesting PPM filter pipelines.
+# In this list, the following magic words may be used:
#
-randcolor() {
- $perl -e 'srand(time ^ $$);
- printf("#%02x%02x%02x-#%02x%02x%02x",
- int(rand()*60),
- int(rand()*60),
- int(rand()*60),
- 120+int(rand()*135),
- 120+int(rand()*135),
- 120+int(rand()*135))'
-}
+# COLORS a randomly-selected pair of RGB foreground/background colors.
+# FILE1 the (already-existing) input PPM file (ok to overwrite it).
+# FILE2-FILE4 names of other tmp files you can use.
+#
+# These commands should read from FILE1, and write to stdout.
+# All tmp files will be deleted afterward.
+#
+my @filters = (
+ "ppmtopgm FILE1 | pgmedge | pgmtoppm COLORS | ppmnorm",
+ "ppmtopgm FILE1 | pgmenhance | pgmtoppm COLORS",
+ "ppmtopgm FILE1 | pgmoil | pgmtoppm COLORS",
+ "ppmtopgm FILE1 | pgmbentley | pgmtoppm COLORS",
-rand() {
- $perl -e "srand(time ^ $$); print int(rand() * $1)"
-}
+ "ppmrelief FILE1 | ppmtopgm | pgmedge | ppmrelief | ppmtopgm |" .
+ " pgmedge | pnminvert | pgmtoppm COLORS",
+ "ppmspread 71 FILE1 > FILE2 ; " .
+ " pnmarith -add FILE1 FILE2 ; ",
+ "pnmflip -lr < FILE1 > FILE2 ; " .
+ " pnmarith -multiply FILE1 FILE2 > FILE3 ; " .
+ " pnmflip -tb FILE3 | ppmnorm > FILE2 ; " .
+ " pnmarith -multiply FILE1 FILE2",
-# Frobnicate the image in some random way.
+ "pnmflip -lr FILE1 > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2",
+
+ "pnmflip -tb FILE1 > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2",
+
+ "pnmflip -lr FILE1 | pnmflip -tb > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2",
+
+ "ppmtopgm < FILE1 | pgmedge > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2 > FILE3 ; " .
+ " cp FILE3 FILE1 ; " .
+ " ppmtopgm < FILE1 | pgmedge > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2 > FILE3 ; " .
+ " ppmnorm < FILE1",
+
+ "pnmflip -lr < FILE1 > FILE2 ; " .
+ " pnmarith -multiply FILE1 FILE2 | ppmrelief | ppmnorm | pnminvert",
+
+ "pnmflip -lr FILE1 > FILE2 ; " .
+ " pnmarith -subtract FILE1 FILE2 | ppmrelief | ppmtopgm | pgmedge",
+
+ "pgmcrater -number 20000 -width WIDTH -height HEIGHT FILE1 | " .
+ " pgmtoppm COLORS > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2 > FILE3 ; " .
+ " pnmflip -tb FILE3 | ppmnorm > FILE2 ; " .
+ " pnmarith -multiply FILE1 FILE2",
+
+ "ppmshift 30 FILE1 | ppmtopgm | pgmoil | pgmedge | " .
+ " pgmtoppm COLORS > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2",
+
+ "ppmpat -madras WIDTH HEIGHT | pnmdepth 255 > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2",
+
+ "ppmpat -tartan WIDTH HEIGHT | pnmdepth 255 > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2",
+
+ "ppmpat -camo WIDTH HEIGHT | pnmdepth 255 | ppmshift 50 > FILE2 ; " .
+ " pnmarith -multiply FILE1 FILE2",
+
+ "pgmnoise WIDTH HEIGHT | pgmedge | pgmtoppm COLORS > FILE2 ; " .
+ " pnmarith -difference FILE1 FILE2 | pnmdepth 255 | pnmsmooth",
+);
+
+
+sub error {
+ ($_) = @_;
+ print STDERR "$progname: $_\n";
+ exit 1;
+}
+
+# #### Lifted from driver/xscreensaver-getimage-file
#
-frob() {
-
- w_h=`head -2 $tmp_ppm1 | tail -1`
- width=`echo $w_h | awk '{print $1}'`
- height=`echo $w_h | awk '{print $2}'`
-
- N=`rand 17`
-
- if [ "$verbose" = true ]; then
- echo "mode $N..." >&2
- fi
-
- if [ $N = 0 ]; then
- ppmtopgm $tmp_ppm1 | pgmedge | pgmtoppm `randcolor` | ppmnorm
-
- elif [ $N = 1 ]; then
- ppmtopgm $tmp_ppm1 |
- pgmenhance |
- pgmtoppm `randcolor`
-
- elif [ $N = 2 ]; then
- ppmtopgm $tmp_ppm1 | pgmoil | pgmtoppm `randcolor`
-
- elif [ $N = 3 ]; then
- ppmrelief $tmp_ppm1 | ppmtopgm | pgmedge | ppmrelief | ppmtopgm |
- pgmedge | pnminvert | pgmtoppm `randcolor`
-
- elif [ $N = 4 ]; then
- ppmspread 71 $tmp_ppm1 > $tmp_ppm2
- pnmarith -add $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 5 ]; then
- pnmflip -lr $tmp_ppm1 > $tmp_ppm2
- pnmarith -multiply $tmp_ppm1 $tmp_ppm2 > $tmp_ppm3
- pnmflip -tb $tmp_ppm3 | ppmnorm > $tmp_ppm2
- pnmarith -multiply $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 6 ]; then
- N2=`rand 3`
- if [ $N2 = 0 ]; then
- pnmflip -lr $tmp_ppm1 > $tmp_ppm2
- elif [ $N2 = 1 ]; then
- pnmflip -tb $tmp_ppm1 > $tmp_ppm2
- else
- pnmflip -lr $tmp_ppm1 > $tmp_ppm2
- pnmflip -tb $tmp_ppm2 > $tmp_ppm3
- cp $tmp_ppm3 $tmp_ppm2
- fi
-
- pnmarith -difference $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 7 ]; then
-
- for i in 1 2 3 ; do
- ppmtopgm $tmp_ppm1 | pgmedge > $tmp_ppm2
- pnmarith -difference $tmp_ppm1 $tmp_ppm2 > $tmp_ppm3
- cp $tmp_ppm3 $tmp_ppm1
- done
- ppmnorm < $tmp_ppm1
-
- elif [ $N = 8 ]; then
- pnmflip -lr $tmp_ppm1 > $tmp_ppm2
- pnmarith -multiply $tmp_ppm1 $tmp_ppm2 | ppmrelief | ppmnorm | pnminvert
-
- elif [ $N = 9 ]; then
- pnmflip -lr $tmp_ppm1 > $tmp_ppm2
- pnmarith -subtract $tmp_ppm1 $tmp_ppm2 | ppmrelief | ppmtopgm | pgmedge
-
- elif [ $N = 10 ]; then
- ppmtopgm $tmp_ppm1 | pgmbentley | pgmtoppm `randcolor`
-
- elif [ $N = 11 ]; then
- pgmcrater -number 20000 -height $height -width $width | pgmtoppm `randcolor` > $tmp_ppm2
- pnmarith -difference $tmp_ppm1 $tmp_ppm2 > $tmp_ppm3
- pnmflip -tb $tmp_ppm3 | ppmnorm > $tmp_ppm2
- pnmarith -multiply $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 12 ]; then
- ppmshift 30 $tmp_ppm1 | ppmtopgm | pgmoil | pgmedge | pgmtoppm `randcolor` > $tmp_ppm2
- pnmarith -difference $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 13 ]; then
- ppmpat -madras $width $height | pnmdepth 255 > $tmp_ppm2
- pnmarith -difference $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 14 ]; then
- ppmpat -tartan $width $height | pnmdepth 255 > $tmp_ppm2
- pnmarith -difference $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 15 ]; then
- ppmpat -camo $width $height | pnmdepth 255 | ppmshift 50 > $tmp_ppm2
- pnmarith -multiply $tmp_ppm1 $tmp_ppm2
-
- elif [ $N = 16 ]; then
- pgmnoise $width $height | pgmedge | pgmtoppm `randcolor` > $tmp_ppm2
- pnmarith -difference $tmp_ppm1 $tmp_ppm2 | pnmdepth 255 | pnmsmooth
-
- else cat $tmp_ppm1
- fi
+sub pick_displayer {
+ my @names = ();
+
+ foreach my $cmd (@displayer_programs) {
+ $_ = $cmd;
+ my ($name) = m/^([^ ]+)/;
+ push @names, "\"$name\"";
+ print STDERR "$progname: looking for $name...\n" if ($verbose > 2);
+ foreach my $dir (split (/:/, $ENV{PATH})) {
+ print STDERR "$progname: checking $dir/$name\n" if ($verbose > 3);
+ return $cmd if (-x "$dir/$name");
+ }
+ }
+
+ $names[$#names] = "or " . $names[$#names];
+ printf STDERR "$progname: none of: " . join (", ", @names) .
+ " were found on \$PATH.\n";
+ exit 1;
}
-# Grab a frame and frob it. leave it in $tmp_ppm3.
+# Choose random foreground and background colors
#
-whack() {
- clean
-
- while [ ! -f $tmp_ppm1 ]; do
- if [ "$use_stdin" != true ]; then
- grab
- else
- cp $tmp_ppmS $tmp_ppm0
- cp $tmp_ppm0 $tmp_ppm1
- fi
- done
-
- rm -f $tmp_rgb
-
- if [ "$screen_width" != "" ]; then
- frob | pnmscale -width $screen_width > $tmp_ppm3
- else
- frob > $tmp_ppm3
- fi
-
- rm -f $tmp_ppm1 $tmp_ppm2
+sub randcolors {
+ return sprintf ("#%02x%02x%02x-#%02x%02x%02x",
+ int(rand()*60),
+ int(rand()*60),
+ int(rand()*60),
+ 120+int(rand()*135),
+ 120+int(rand()*135),
+ 120+int(rand()*135));
}
-# Kill off the xli or xv subprocess, if it's running
+sub filter_subst {
+ my ($filter, $width, $height, @tmpfiles) = @_;
+ my $colors = randcolors();
+ $filter =~ s/\bWIDTH\b/$width/g;
+ $filter =~ s/\bHEIGHT\b/$height/g;
+ $filter =~ s/\bCOLORS\b/'$colors'/g;
+ my $i = 1;
+ foreach my $t (@tmpfiles) {
+ $filter =~ s/\bFILE$i\b/$t/g;
+ $i++;
+ }
+ if ($filter =~ m/([A-Z]+)/) {
+ error "internal error: what is \"$1\"?";
+ }
+ $filter =~ s/ +/ /g;
+ return $filter;
+}
+
+# Frobnicate the image in some random way.
#
-kill_pid() {
- if [ "$pid" != "" ]; then
+sub frob_ppm {
+ my ($ppm_data) = @_;
+ $_ = $ppm_data;
+
+ error "0-length data" if (!defined($ppm_data) || $ppm_data eq "");
+ error "not a PPM file" unless (m/^P\d\n/s);
+ my ($width, $height) = m/^P\d\n(\d+) (\d+)\n/s;
+ error "got a bogus PPM" unless ($width && $height);
+
+ my $tmpdir = $ENV{TMPDIR};
+ $tmpdir = "/tmp" unless $tmpdir;
+ my $fn = sprintf("$tmpdir/vw.%04x", $$);
+ my @files = ( "$fn", "$fn.1", "$fn.2", "$fn.3" );
+
+ my $n = int(rand($#filters+1));
+ my $filter = $filters[$n];
+
+ if ($verbose == 1) {
+ printf STDERR "$progname: running filter $n\n";
+ } elsif ($verbose > 1) {
+ my $f = $filter;
+ $f =~ s/ +/ /g;
+ $f =~ s/^ */\t/;
+ $f =~ s/ *\|/\n\t|/g;
+ $f =~ s/ *\; */ ;\n\t/g;
+ print STDERR "$progname: filter $n:\n\n$f\n\n" if $verbose;
+ }
+
+ $filter = filter_subst ($filter, $width, $height, @files);
+
+ unlink @files;
+
+ local *OUT;
+ open (OUT, ">$files[0]") || error ("writing $files[0]: $!");
+ print OUT $ppm_data;
+ close OUT;
+
+ $filter = "( $filter )";
+ $filter .= "2>/dev/null" unless ($verbose > 1);
+
+ local *IN;
+ open (IN, "$filter |") || error ("opening pipe: $!");
+ $ppm_data = "";
+ while (<IN>) { $ppm_data .= $_; }
+ close IN;
+
+ unlink @files;
+ return $ppm_data;
+}
- if [ "$verbose" = true ]; then
- echo "killing pid $pid..." >&2
- fi
- # need to do this to avoid "6898 Terminated" messages!
- # apparently one can't redirect the output of the builtin `kill' command.
-# ( sh -c "kill $pid" ) >/dev/null 2>/dev/null </dev/null
+sub read_config {
+ my $conf = "$ENV{HOME}/.xscreensaver";
- # wtf? that doesn't work either. Is it writing to /dev/tty??
- kill $pid >/dev/null 2>&1
+ my $had_dir = defined($imagedir);
- pid=""
- fi
-}
+ local *IN;
+ open (IN, "<$conf") || error "reading $conf: $!";
+ while (<IN>) {
+ if (!$imagedir && m/^imageDirectory:\s+([^\s]+)\s*$/i) { $imagedir = $1; }
+ elsif (m/^grabVideoFrames:\s+true\s*$/i) { $video_p = 1; }
+ elsif (m/^grabVideoFrames:\s+false\s*$/i) { $video_p = 0; }
+ elsif (m/^chooseRandomImages:\s+true\s*$/i) { $file_p = 1; }
+ elsif (m/^chooseRandomImages:\s+false\s*$/i) { $file_p = 0; }
+ }
+ close IN;
-# called when this process is signalled (for cleanup)
-#
-my_trap() {
- if [ "$verbose" = true ]; then
- echo "trapped signal!" >&2
- fi
- kill_pid
- clean2
- exit 1
-}
+ $file_p = 1 if $had_dir;
-main() {
- getargs $@
+ if (!$file_p && !$video_p) {
+# error "neither grabVideoFrames nor chooseRandomImages are set\n\t" .
+# "in $conf; $progname requires one or both."
+ $file_p = 1;
+ }
- trap my_trap 1 2 3 6 9 13 15
+ if ($file_p) {
+ error "no imageDirectory set in $conf" unless $imagedir;
+ error "imageDirectory $imagedir doesn't exist" unless (-d $imagedir);
+ }
- if [ "$use_stdin" = true ]; then
- cat > $tmp_ppmS
- fi
+ if ($verbose > 1) {
+ printf STDERR "$progname: grab video: $video_p\n";
+ printf STDERR "$progname: grab images: $file_p\n";
+ printf STDERR "$progname: directory: $imagedir\n";
+ }
- while true; do
+}
- # Loop grabbing and frobbing images.
- #
- # If we're running on the root, run xv or xli in the foreground
- # (with -exit, if xv) and then wait.
- #
- # If we're running in a window, spawn xv or xli in the background; then
- # when it's time to put up the new image, kill off the currently-running
- # xv or xli.
- if [ "$verbose" = true ]; then
- whack
- else
- whack >/dev/null 2>&1
- fi
+sub get_ppm {
+ if ($use_stdin) {
+ print STDERR "$progname: reading from stdin\n" if ($verbose > 1);
+ my $ppm = "";
+ while (<STDIN>) { $ppm .= $_; }
+ return $ppm;
+
+ } else {
+
+ my $do_file_p;
+
+ if ($file_p && $video_p) {
+ $do_file_p = (int(rand(2)) == 0);
+ print STDERR "$progname: doing " . ($do_file_p ? "files" : "video") ."\n"
+ if ($verbose);
+ }
+ elsif ($file_p) { $do_file_p = 1; }
+ elsif ($video_p) { $do_file_p = 0; }
+ else {
+ error "internal error: not grabbing files or video?";
+ }
+
+ my $v = ($verbose <= 1 ? "" : "-" . ("v" x ($verbose-1)));
+ my $cmd;
+ if ($do_file_p) {
+ $cmd = "xscreensaver-getimage-file $v --name $imagedir";
+ } else {
+ $cmd = "xscreensaver-getimage-video $v --stdout";
+ }
+
+ my $ppm;
+
+ if ($do_file_p) {
+
+ print STDERR "$progname: running \"$cmd\"\n" if ($verbose > 1);
+ my $fn = `$cmd`;
+ $fn =~ s/\n$//s;
+ error "didn't get a file?" if ($fn eq "");
+
+ print STDERR "$progname: selected file $fn\n" if ($verbose > 1);
+
+ if ($fn =~ m/\.gif/i) { $cmd = "giftopnm < $fn"; }
+ elsif ($fn =~ m/\.jpe?g/i) { $cmd = "djpeg < $fn"; }
+ else {
+ error "unrecognized file extension on $fn";
+ }
+
+ print STDERR "$progname: converting with \"$cmd\"\n" if ($verbose > 1);
+ $cmd .= " 2>/dev/null" unless ($verbose > 1);
+ $ppm = `$cmd`;
+
+ } else {
+
+ print STDERR "$progname: running \"$cmd\"\n" if ($verbose > 1);
+ $ppm = `$cmd`;
+ error "no data?" if ($ppm eq "");
+ error "not a PPM file" unless ($ppm =~ m/^P\d\n/s);
+
+ $_ = $ppm;
+ my ($width, $height) = m/^P\d\n(\d+) (\d+)\n/s;
+ error "got a bogus PPM" unless ($width && $height);
+ print STDERR "$progname: grabbed ${width}x$height PPM\n"
+ if ($verbose > 1);
+ $_ = 0;
+ }
+
+ return $ppm;
+ }
+}
- kill_pid
+sub dispose_ppm {
+ my ($ppm) = @_;
- if [ ! -s $tmp_ppm3 ]; then
- echo "$0: no image grabbed" >&2
+ error "0-length data" if (!defined($ppm) || $ppm eq "");
+ error "not a PPM file" unless ($ppm =~ m/^P\d\n/s);
- elif [ "$use_stdout" = true ]; then
+ if ($use_stdout) {
+ print STDERR "$progname: writing to stdout\n" if ($verbose > 1);
+ print $ppm;
- cat $tmp_ppm3
- clean2
- exit 0
+ } else {
+ my $displayer = pick_displayer();
- else
+ my $tmpdir = $ENV{TMPDIR};
+ $tmpdir = "/tmp" unless $tmpdir;
+ my $fn = sprintf("$tmpdir/vw.%04x", $$);
+ local *OUT;
+ unlink $fn;
+ open (OUT, ">$fn") || error "writing $fn: $!";
+ print OUT $ppm;
+ close OUT;
-# pnmtosgi < $tmp_ppm3 > $tmp_ppm2
-# rm -f $tmp_ppm3
- mv $tmp_ppm3 $tmp_ppm2
+ my @cmd = split (/ +/, $displayer);
+ push @cmd, $fn;
+ print STDERR "$progname: executing \"" . join(" ", @cmd) . "\"\n"
+ if ($verbose);
+ system (@cmd);
- if [ -s $tmp_ppm2 ]; then
- if [ "$verbose" = true ]; then
- echo "launching $displayer $displayer_args $tmp_ppm2" >&2
- ls -lF $tmp_ppm2
- fi
+ unlink $fn;
+ }
+}
- mv $tmp_ppm2 $tmp_ppm0
- eval "$displayer $displayer_args $tmp_ppm0 &"
-# this doesn't work -- leaves xv processes around, instead of stray xset
-# data. Sigh.
-#
-# # cat the file so that we can nuke it without racing against xv.
-# cat $tmp_ppm2 | $displayer $displayer_args - &
+my $stdin_ppm = undef;
- pid=$!
- fi
- fi
+sub vidwhack {
+ my $ppm;
+ if ($use_stdin) {
+ if (!defined($stdin_ppm)) {
+ $stdin_ppm = get_ppm();
+ }
+ $ppm = $stdin_ppm;
+ } else {
+ $ppm = get_ppm();
+ }
- clean
- sleep $delay
+ $ppm = frob_ppm ($ppm);
+ dispose_ppm ($ppm);
+ $ppm = undef;
+}
- done
- exit 1
+
+sub usage {
+ print STDERR "VidWhacker, Copyright (c) 2001 Jamie Zawinski <jwz\@jwz.org>\n";
+ print STDERR " http://www.jwz.org/xscreensaver/";
+ print STDERR "\n";
+ print STDERR "usage: $0 [-display dpy] [-verbose] [-root | -window]\n";
+ print STDERR " [-stdin] [-stdout] [-delay secs]\n";
+ print STDERR " [-directory image_directory]\n";
+ exit 1;
}
-main $@
+sub main {
+ while ($_ = $ARGV[0]) {
+ shift @ARGV;
+ if ($_ eq "--verbose") { $verbose++; }
+ elsif (m/^-v+$/) { $verbose += length($_)-1; }
+ elsif (m/^(-display|-disp|-dis|-dpy|-d)$/) { $ENV{DISPLAY} = shift @ARGV; }
+ elsif (m/^--?stdin$/) { $use_stdin = 1; }
+ elsif (m/^--?stdout$/) { $use_stdout = 1; }
+ elsif (m/^--?delay$/) { $delay = shift @ARGV; }
+ elsif (m/^--?dir(ectory)?$/) { $imagedir = shift @ARGV; }
+ elsif (m/^--?root$/) { }
+ elsif (m/^--?window$/) {
+ print STDERR "$progname: sorry, \"-window\" is unimplemented.\n";
+ print STDERR "$progname: use \"-stdout\" and pipe to a displayer.\n";
+ exit 1;
+ }
+ elsif (m/^-./) { usage; }
+ else { usage; }
+ }
+
+ read_config;
+
+ if (!$use_stdout) {
+ $_ = `xdpyinfo 2>-`;
+ ($screen_width) =~ m/ dimensions: +(\d+)x(\d+) pixels/;
+ $screen_width = 800 unless $screen_width > 0;
+ }
+
+ if ($use_stdout) {
+ vidwhack();
+ } else {
+ while (1) {
+ vidwhack();
+ sleep $delay;
+ }
+ }
+}
-# to find stray xv data:
-# xwininfo -root -children|grep 'xv image comments' | awk '{print "xkill -id ", $1}'
+main;
+exit 0;
projects / xscreensaver / blobdiff