From d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 Mon Sep 17 00:00:00 2001 From: Simon Rettberg Date: Tue, 16 Oct 2018 10:08:48 +0200 Subject: Original 5.40 --- hacks/vidwhacker | 506 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 506 insertions(+) create mode 100755 hacks/vidwhacker (limited to 'hacks/vidwhacker') diff --git a/hacks/vidwhacker b/hacks/vidwhacker new file mode 100755 index 0000000..9646f6b --- /dev/null +++ b/hacks/vidwhacker @@ -0,0 +1,506 @@ +#!/usr/bin/perl -w +# vidwhacker, for xscreensaver. Copyright (c) 1998-2011 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 +# the above copyright notice appear in all copies and that both that +# copyright notice and this permission notice appear in supporting +# documentation. No representations are made about the suitability of this +# software for any purpose. It is provided "as is" without express or +# implied warranty. +# +# 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... +# +# Created: 14-Apr-01. + +require 5; +use diagnostics; +use strict; + +my $progname = $0; $progname =~ s@.*/@@g; +my ($version) = ('$Revision: 1.33 $' =~ m/\s(\d[.\d]+)\s/s); + +my $verbose = 0; +my $use_stdin = 0; +my $use_stdout = 0; +my $video_p = 0; +my $file_p = 1; +my $delay = 5; +my $imagedir; + +my $screen_width = -1; + +my $displayer = "xscreensaver-getimage -root -file"; + +sub which($); + +# apparently some versions of netpbm call it "pamoil" instead of "pgmoil"... +# +my $pgmoil = (which("pamoil") ? "pamoil" : "pgmoil"); + + +# List of interesting PPM filter pipelines. +# In this list, the following magic words may be used: +# +# 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", + + "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", + + "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 | $pgmoil | pgmedge | " . + " pgmtoppm COLORS > FILE2 ; " . + " pnmarith -difference FILE1 FILE2", + + "ppmpat -madras WIDTH HEIGHT | pnmdepth 255 > FILE2 ; " . + " pnmarith -difference FILE1 FILE2", + + "ppmpat -tartan WIDTH HEIGHT | pnmdepth 255 > FILE2 ; " . + " pnmarith -difference FILE1 FILE2", + + "ppmpat -camo WIDTH HEIGHT | pnmdepth 255 | ppmshift 50 > FILE2 ; " . + " pnmarith -multiply FILE1 FILE2", + + "pgmnoise WIDTH HEIGHT | pgmedge | pgmtoppm COLORS > FILE2 ; " . + " pnmarith -difference FILE1 FILE2 | pnmdepth 255 | pnmsmooth", +); + + +# Any files on this list will be deleted at exit. +# +my @all_tmpfiles = (); + +sub exit_cleanup() { + print STDERR "$progname: delete tmp files\n" if ($verbose); + unlink @all_tmpfiles; +} + +sub signal_cleanup() { + my ($sig) = @_; + print STDERR "$progname: caught SIG$sig\n" if ($verbose); + exit 1; +} + +sub init_signals() { + + $SIG{HUP} = \&signal_cleanup; + $SIG{INT} = \&signal_cleanup; + $SIG{QUIT} = \&signal_cleanup; + $SIG{ABRT} = \&signal_cleanup; + $SIG{KILL} = \&signal_cleanup; + $SIG{TERM} = \&signal_cleanup; + + # Need this so that if giftopnm dies, we don't die. + $SIG{PIPE} = 'IGNORE'; +} + +END { exit_cleanup(); } + + +# returns the full path of the named program, or undef. +# +sub which($) { + my ($prog) = @_; + foreach (split (/:/, $ENV{PATH})) { + if (-x "$_/$prog") { + return $prog; + } + } + return undef; +} + + +# Choose random foreground and background colors +# +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)); +} + + + +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 $filter; +} + +# Frobnicate the image in some random way. +# +sub frob_ppm($) { + 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 ("%s/vidwhacker-0-%08x", $tmpdir, rand(0xFFFFFFFF)); + my $fn1 = sprintf ("%s/vidwhacker-1-%08x", $tmpdir, rand(0xFFFFFFFF)); + my $fn2 = sprintf ("%s/vidwhacker-2-%08x", $tmpdir, rand(0xFFFFFFFF)); + my $fn3 = sprintf ("%s/vidwhacker-3-%08x", $tmpdir, rand(0xFFFFFFFF)); + my @files = ( "$fn", "$fn1", "$fn2", "$fn3" ); + push @all_tmpfiles, @files; + + 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 () { $ppm_data .= $_; } + close IN; + + unlink @files; + return $ppm_data; +} + + +sub read_config() { + my $conf = "$ENV{HOME}/.xscreensaver"; + + my $had_dir = defined($imagedir); + + local *IN; + open (IN, "<$conf") || error ("reading $conf: $!"); + while () { + if (!$imagedir && m/^imageDirectory:\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; + + $file_p = 1 if $had_dir; + + $imagedir = undef unless ($imagedir && $imagedir ne ''); + + if (!$file_p && !$video_p) { +# error ("neither grabVideoFrames nor chooseRandomImages are set\n\t") . +# "in $conf; $progname requires one or both." + $file_p = 1; + } + + if ($file_p) { + error ("no imageDirectory set in $conf") unless $imagedir; + error ("imageDirectory $imagedir doesn't exist") unless (-d $imagedir); + } + + if ($verbose > 1) { + printf STDERR "$progname: grab video: $video_p\n"; + printf STDERR "$progname: grab images: $file_p\n"; + printf STDERR "$progname: directory: $imagedir\n"; + } + +} + + +sub get_ppm() { + if ($use_stdin) { + print STDERR "$progname: reading from stdin\n" if ($verbose > 1); + my $ppm = ""; + while () { $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 ""); + $fn = "$imagedir/$fn" unless ($fn =~ m@^/@s); + + 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\""; } + elsif ($fn =~ m/\.png/i) { $cmd = "pngtopnm < \"$fn\""; } + elsif ($fn =~ m/\.xpm/i) { $cmd = "xpmtoppm < \"$fn\""; } + elsif ($fn =~ m/\.bmp/i) { $cmd = "bmptoppm < \"$fn\""; } + elsif ($fn =~ m/\.tiff?/i) { $cmd = "tifftopnm < \"$fn\""; } + elsif ($fn =~ m/\.p[bgp]m/i) { return `cat \"$fn\"`; } + else { + print STDERR "$progname: $fn: unrecognized file extension\n"; + # go around the loop and get another + return undef; + } + + print STDERR "$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 $ppm; + } +} + +sub dispose_ppm($) { + my ($ppm) = @_; + + error ("0-length data") if (!defined($ppm) || $ppm eq ""); + error ("not a PPM file") unless ($ppm =~ m/^P\d\n/s); + + if ($use_stdout) { + print STDERR "$progname: writing to stdout\n" if ($verbose > 1); + print $ppm; + + } else { + my $tmpdir = $ENV{TMPDIR}; + $tmpdir = "/tmp" unless $tmpdir; + my $fn = sprintf ("%s/vidwhacker-%08x.ppm", $tmpdir, rand(0xFFFFFFFF)); + local *OUT; + unlink $fn; + push @all_tmpfiles, $fn; + open (OUT, ">$fn") || error ("writing $fn: $!"); + print OUT $ppm; + close OUT; + + my @cmd = split (/ +/, $displayer); + push @cmd, $fn; + print STDERR "$progname: executing \"" . join(" ", @cmd) . "\"\n" + if ($verbose); + system (@cmd); + + my $exit_value = $? >> 8; + my $signal_num = $? & 127; + my $dumped_core = $? & 128; + + unlink $fn; + + error ("$cmd[0]: core dumped!") if ($dumped_core); + error ("$cmd[0]: signal $signal_num!") if ($signal_num); + error ("$cmd[0]: exited with $exit_value!") if ($exit_value); + } +} + + +my $stdin_ppm = undef; + +sub vidwhack() { + my $ppm; + if ($use_stdin) { + if (!defined($stdin_ppm)) { + $stdin_ppm = get_ppm(); + } + $ppm = $stdin_ppm; + } else { + my $max_err_count = 20; + my $err_count = 0; + while (!defined($ppm)) { + $ppm = get_ppm(); + $err_count++ if (!defined ($ppm)); + error ("too many errors, too few images!") + if ($err_count > $max_err_count); + } + } + + $ppm = frob_ppm ($ppm); + dispose_ppm ($ppm); + $ppm = undef; +} + + +sub error($) { + my ($err) = @_; + print STDERR "$progname: $err\n"; + exit 1; +} + +sub usage() { + print STDERR "VidWhacker, Copyright (c) 2001 Jamie Zawinski \n"; + print STDERR " https://www.jwz.org/xscreensaver/"; + print STDERR "\n"; + print STDERR "usage: $0 [-display dpy] [-verbose]\n"; + print STDERR "\t\t[-root | -window | -window-id 0xXXXXX ]\n"; + print STDERR "\t\t[-stdin] [-stdout] [-delay secs]\n"; + print STDERR "\t\t[-directory image_directory]\n"; + exit 1; +} + +sub main() { + while ($_ = $ARGV[0]) { + shift @ARGV; + if (m/^--?verbose$/) { $verbose++; } + elsif (m/^-v+$/) { $verbose += length($_)-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-id$/) { + my $id = shift @ARGV; + error ("unparsable window id: $id") + unless ($id =~ m/^\d+$|^0x[\da-f]+$/i); + $displayer =~ s/--?root\b/$id/ || + error ("unable to munge displayer: $displayer"); + } + elsif (m/^--?window$/) { + 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; } + } + + init_signals(); + + read_config; + + # sanity checking - is pbm installed? + # (this is a non-exhaustive but representative list) + foreach ("ppmtopgm", "pgmenhance", "pnminvert", "pnmarith", "pnmdepth") { + which ($_) || error "$_ not found on \$PATH."; + } + + 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; + } + } +} + +main(); +exit 0; -- cgit v1.2.3-55-g7522