#
# default-n: webcollage -root \n\
# default-n: webcollage -root -filter 'vidwhacker -stdin -stdout' \n\
-#
-# To run this as a CGI program on a web site, do this (these instructions
-# work with Apache 1.3 or newer):
-#
-# 1: Place this program in your document directory, named "webcollage".
-# The name shouldn't end in .cgi or .html, since this CGI behaves like
-# a directory.
-# 2: Make it world-readable and world-executable.
-# 3: Create a ".htaccess" file in the same directory containing these lines:
-# <Files ~ "^webcollage$">
-# SetHandler cgi-script
-# </Files>
-# 4: Create these files in the same directory, world-writable, zero-length:
-# collage.ppm
-# collage.tmp
-# collage.jpg
-# collage.pending
-# collage.map
-#
-# Now the CGI is ready to go.
-
-my $copyright = "WebCollage, Copyright (c) 1999" .
- " Jamie Zawinski <jwz\@jwz.org>\n" .
- " http://www.jwz.org/xscreensaver/\n";
-my $argv0 = $0;
-my $progname = $argv0; $progname =~ s@.*/@@g;
-my $version = q{ $Revision: 1.7 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+require 5;
+#use diagnostics;
+use strict;
use Socket;
require Time::Local;
use Fcntl ':flock'; # import LOCK_* constants
-# CGI Parameters
-
-my $data_dir = ""; # if you want the following files to go in
- # some directory below ".", name it here.
-
-my $image_ppm = "${data_dir}collage.ppm"; # names of the various data files.
-my $image_tmp = "${data_dir}collage.tmp";
-my $image_jpg = "${data_dir}collage.jpg";
-my $pending_file = "${data_dir}collage.pending";
-my $map_file = "${data_dir}collage.map";
-
-my $url_generation_time = 60; # total time to spend getting URLs.
-my $image_retrieval_time = 60; # maximum time to spend loading all images.
-my $max_map_entries = 100; # how many lines to save in $map_file.
-my $pastes_per_load = 3; # how many images to try and paste each time.
-
-my $max_age = 5 * 60; # minutes before it is considered stale.
-my $scale = 1.0; # client-side image expansion.
-
-my $img_width = 800; # size of the image being generated.
-my $img_height = 600;
-
-my @all_files = ($image_ppm, $image_tmp, $image_jpg, $pending_file, $map_file);
-my $script_date;
+my $version = q{ $Revision: 1.32 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+my $copyright = "WebCollage $version, Copyright (c) 1999" .
+ " Jamie Zawinski <jwz\@jwz.org>\n" .
+ " http://www.jwz.org/xscreensaver/\n";
-# Other Parameters
+my $argv0 = $0;
+my $progname = $argv0; $progname =~ s@.*/@@g;
my $random_redirector = "http://random.yahoo.com/bin/ryl";
-my $image_randomizer_a = "http://image.altavista.com/";
-my $image_randomizer = $image_randomizer_a . "cgi-bin/avncgi" .
- "?do=3&verb=no&oshape=n&oorder=" .
- "&ophoto=1&oart=1&ocolor=1&obw=1" .
- "&stype=simage&oprem=0&query=";
-
+my $image_randomizer_1 = "http://image.altavista.com/cgi-bin/avncgi" .
+ "?do=3" .
+ "&verb=n" .
+ "&oshape=n" .
+ "&oorder=" .
+ "&ophoto=1&oart=1&ocolor=1&obw=1" .
+ "&stype=simage" .
+ "&oprem=0" .
+ "&query=";
+my $image_randomizer_2 = "http://www.hotbot.com/?clickSrc=search" .
+ "&submit=SEARCH&SM=SC&LG=any" .
+ "&AM0=MC&AT0=words&AW0=" .
+ "&AM1=MN&AT1=words&AW1=" .
+ "&savenummod=2&date=within" .
+ "&DV=0&DR=newer&DM=1&DD=1&DY=99&FVI=1&FS=&RD=RG" .
+ "&RG=all&Domain=&PS=A&PD=&STEM=1&DC=50&DE=0&_v=2" .
+ "&OPs=MDRTP&NUMMOD=2" .
+ "&MT=";
+my $image_randomizer_3 = "http://www.altavista.com/cgi-bin/query?pg=q" .
+ "&text=yes&kl=XX&stype=stext&q=";
+
+my $image_ppm = ($ENV{TMPDIR} ? $ENV{TMPDIR} : "/tmp") . "/webcollage." . $$;
+my $image_tmp1 = $image_ppm . "-1";
+my $image_tmp2 = $image_ppm . "-2";
+
+my $img_width; # size of the image being generated.
+my $img_height;
+
+my $http_proxy = undef;
my $http_timeout = 30;
+my $cvt_timeout = 10;
my $ppm_to_root_window_cmd = "xv -root -rmode 5 -viewonly" .
" +noresetroot %%PPM%% -quit";
my $filter_cmd = undef;
if (!-r $wordlist) {
$wordlist = "/usr/share/lib/dict/words"; # irix
}
+die "$wordlist doesn't exist!\n" unless (-r $wordlist);
my $min_width = 50;
my $min_height = 50;
my $min_ratio = 1/5;
-my $DEBUG = 0;
+my $verbose = 0;
+
+my %rejected_urls;
+my @tripwire_words = ("aberrate", "abode", "amorphous", "antioch",
+ "arrhenius", "arteriole", "blanket", "brainchild",
+ "burdensome", "carnival", "cherub", "chord", "clever",
+ "dedicate", "dilogarithm", "dolan", "dryden",
+ "eggplant");
+
my ( $url, $referer, $timeout ) = @_;
if (!defined($timeout)) { $timeout = $http_timeout; }
- if ($timeout <= 0) { return undef; }
+ if ($timeout <= 0) { return (); }
if ($timeout > $http_timeout) { $timeout = $http_timeout; }
- if ( $DEBUG > 3 ) {
- print STDERR "get_document_1 $url " .
+ if ( $verbose > 3 ) {
+ print STDERR "$progname: get_document_1 $url " .
($referer ? $referer : "") . "\n";
}
my($url_proto, $dummy, $serverstring, $path) = split(/\//, $url, 4);
if (! ($url_proto && $url_proto =~ m/^http:$/i)) {
- if ($DEBUG) { print STDERR "not an HTTP URL: $url\n"; }
- return undef;
+ if ($verbose) { print STDERR "$progname: not an HTTP URL: $url\n"; }
+ return ();
}
+
+ $path = "" unless $path;
+
my($them,$port) = split(/:/, $serverstring);
$port = 80 unless $port;
- my $size="";
+
+ my $them2 = $them;
+ my $port2 = $port;
+ if ($http_proxy) {
+ $serverstring = $http_proxy if $http_proxy;
+ ($them2,$port2) = split(/:/, $serverstring);
+ $port2 = 80 unless $port2;
+ }
my ($remote, $iaddr, $paddr, $proto, $line);
- $remote = $them;
- if ($port =~ /\D/) { $port = getservbyname($port, 'tcp') }
- return unless $port;
- $iaddr = inet_aton($remote) || return;
- $paddr = sockaddr_in($port, $iaddr);
+ $remote = $them2;
+ if ($port2 =~ /\D/) { $port2 = getservbyname($port2, 'tcp') }
+ return unless $port2;
+ $iaddr = inet_aton($remote) || return;
+ $paddr = sockaddr_in($port2, $iaddr);
+
@_ =
eval {
local $SIG{ALRM} = sub {
- if ($DEBUG > 0) {
- print STDERR "timed out ($timeout) for $url\n";
+ if ($verbose > 0) {
+ print STDERR "$progname: timed out ($timeout) for $url\n";
}
- die "alarm\n" };
+ die "alarm\n"
+ };
alarm $timeout;
$proto = getprotobyname('tcp');
- socket(S, PF_INET, SOCK_STREAM, $proto) || return;
- connect(S, $paddr) || return;
+ if (!socket(S, PF_INET, SOCK_STREAM, $proto)) {
+ print STDERR "$progname: socket: $!\n" if ($verbose);
+ return;
+ }
+ if (!connect(S, $paddr)) {
+ print STDERR "$progname: connect($serverstring): $!\n"
+ if ($verbose);
+ return;
+ }
select(S); $| = 1; select(STDOUT);
- print S ("GET /$path HTTP/1.0\n" .
+ my $cookie;
+ if ($remote =~ m/\baltavista\.com$/i) {
+ # kludge to tell the various altavista sites to be uncensored.
+ $cookie = "AV_ALL=1";
+ }
+
+ print S ("GET " . ($http_proxy ? $url : "/$path") . " HTTP/1.0\n" .
"Host: $them\n" .
"User-Agent: $progname/$version\n" .
($referer ? "Referer: $referer\n" : "") .
+ ($cookie ? "Cookie: $cookie\n" : "") .
"\n");
-
my $http = <S>;
my $head = "";
close S;
+ if ( $verbose > 3 ) {
+ print STDERR "$progname: ==> $http\n";
+ }
+
return ( $http, $head, $body );
};
die if ($@ && $@ ne "alarm\n"); # propagate errors
if ($@) {
# timed out
- return undef;
+ return ();
} else {
# didn't
alarm 0;
my ( $url, $referer, $timeout ) = @_;
my $start = time;
+ my $orig_url = $url;
+ my $loop_count = 0;
+ my $max_loop_count = 4;
+
do {
- if (defined($timeout) && $timeout <= 0) { return undef; }
+ if (defined($timeout) && $timeout <= 0) { return (); }
my ( $http, $head, $body ) = get_document_1 ($url, $referer, $timeout);
$start = $now;
}
- return undef if ( ! $body );
+ return () if ( ! $body );
if ( $http =~ m@HTTP/[0-9.]+ 30[23]@ ) {
$_ = $head;
my ( $location ) = m@^location:[ \t]*(.*)$@im;
if ( $location ) {
+ $location =~ s/[\r\n]$//;
- if ( $DEBUG > 3 ) {
- print STDERR "redirect from $url to $location\n";
+ if ( $verbose > 3 ) {
+ print STDERR "$progname: redirect from " .
+ "$url to $location\n";
}
$referer = $url;
$url = $location;
+
+ if ($url =~ m@^/@) {
+ $referer =~ m@^(http://[^/]+)@i;
+ $url = $1 . $url;
+ } elsif (! ($url =~ m@^[a-z]+:@i)) {
+ $_ = $referer;
+ s@[^/]+$@@g if m@^http://[^/]+/@i;
+ $_ .= "/" if m@^http://[^/]+$@i;
+ $url = $_ . $url;
+ }
+
} else {
return ( $url, $body );
}
+ if ($loop_count++ > $max_loop_count) {
+ if ( $verbose > 1 ) {
+ print STDERR "$progname: too many redirects " .
+ "($max_loop_count) from $orig_url\n";
+ }
+ return ();
+ }
+
} elsif ( $http =~ m@HTTP/[0-9.]+ [4-9][0-9][0-9]@ ) {
# http errors -- return nothing.
- return undef;
+ return ();
} else {
# given a URL and the body text at that URL, selects and returns a random
-# image from it. returns undef if no suitable images found.
+# image from it. returns () if no suitable images found.
#
sub pick_image_from_body {
- my ( $base, $body ) = @_;
+ my ( $url, $body ) = @_;
- $_ = $base;
+ my $base = $url;
+ $_ = $url;
# if there's at least one slash after the host, take off the last
# pathname component
if ( m@^http://[^/]+/@io ) {
- ( $base = $base ) =~ s@[^/]+$@@go;
+ $base =~ s@[^/]+$@@go;
}
# if there are no slashes after the host at all, put one on the end.
$base .= "/";
}
- if ( $DEBUG > 3 ) {
- print STDERR "base is $base\n";
+ if ( $verbose > 3 ) {
+ print STDERR "$progname: base is $base\n";
}
# nuke comments
s/<!--.*?-->//go;
+
+ # There are certain web sites that list huge numbers of dictionary
+ # words in their bodies or in their <META NAME=KEYWORDS> tags (surprise!
+ # Porn sites tend not to be reputable!)
+ #
+ # I do not want webcollage to filter on content: I want it to select
+ # randomly from the set of images on the web. All the logic here for
+ # rejecting some images is really a set of heuristics for rejecting
+ # images that are not really images: for rejecting *text* that is in
+ # GIF/JPEG form. I don't want text, I want pictures, and I want the
+ # content of the pictures to be randomly selected from among all the
+ # available content.
+ #
+ # So, filtering out "dirty" pictures by looking for "dirty" keywords
+ # would be wrong: dirty pictures exist, like it or not, so webcollage
+ # should be able to select them.
+ #
+ # However, picking a random URL is a hard thing to do. The mechanism I'm
+ # using is to search for a selection of random words. This is not
+ # perfect, but works ok most of the time. The way it breaks down is when
+ # some URLs get precedence because their pages list *every word* as
+ # related -- those URLs come up more often than others.
+ #
+ # So, after we've retrieved a URL, if it has too many keywords, reject
+ # it. We reject it not on the basis of what those keywords are, but on
+ # the basis that by having so many, the page has gotten an unfair
+ # advantage against our randomizer.
+ #
+ my $trip_count = 0;
+ foreach my $trip (@tripwire_words) {
+ $trip_count++ if m/$trip/i;
+ }
+ if ($trip_count >= $#tripwire_words - 2) {
+ if ($verbose > 1) {
+ print STDERR "$progname: there is probably a dictionary in" .
+ " \"$url\": rejecting.\n";
+ }
+ $rejected_urls{$url} = -1;
+ return ();
+ }
+
+
my @urls;
my %unique_urls;
foreach (split(/ *</)) {
- if ( m/^(img|a) .*(src|href) ?= ?\"? ?(.*?)[ >\"]/io ) {
+ if ( m/^meta /i ) {
+
+ # Likewise, reject any web pages that have a KEYWORDS meta tag
+ # that is too long.
+ #
+ if (m/name ?= ?\"?keywords\"?/i &&
+ m/content ?= ?\"([^\"]+)\"/) {
+ my $L = length($1);
+ if ($L > 1000) {
+ if ($verbose > 1) {
+ print STDERR "$progname: keywords of" .
+ " length $L in $url: rejecting.\n";
+ }
+ $rejected_urls{$url} = $L;
+ return ();
+ } elsif ( $verbose > 2 ) {
+ print STDERR "$progname: keywords of length $L" .
+ " in $url (ok.)\n";
+ }
+ }
+
+ } elsif ( m/^(img|a) .*(src|href) ?= ?\"? ?(.*?)[ >\"]/io ) {
my $was_inline = ( "$1" eq "a" || "$1" eq "A" );
my $link = $3;
- my ( $width ) = m/width ?=[ \"]*([0-9]+)/oi;
- my ( $height ) = m/height ?=[ \"]*([0-9]+)/oi;
+ my ( $width ) = m/width ?=[ \"]*(\d+)/oi;
+ my ( $height ) = m/height ?=[ \"]*(\d+)/oi;
$_ = $link;
if ( m@^/@o ) {
next;
}
-# # skip GIF?
-# if ( m@[.](gif)@io ) {
-## if ( $DEBUG > 2 ) { print STDERR "skip GIF $_\n"; }
-# next;
-# }
-
# skip really short or really narrow images
if ( $width && $width < $min_width) {
- if ( $DEBUG > 2 ) {
+ if ( $verbose > 2 ) {
if (!$height) { $height = "?"; }
- print STDERR "skip narrow image $_ ($width x $height)\n";
+ print STDERR "$progname: skip narrow image " .
+ "$_ (${width}x$height)\n";
}
next;
}
if ( $height && $height < $min_height) {
- if ( $DEBUG > 2 ) {
+ if ( $verbose > 2 ) {
if (!$width) { $width = "?"; }
- print STDERR "skip short image $_ ($width x $height)\n";
+ print STDERR "$progname: skip short image " .
+ "$_ (${width}x$height)\n";
}
next;
}
# skip images with ratios that make them look like banners.
if ( $min_ratio && $width && $height &&
($width * $min_ratio ) > $height ) {
- if ( $DEBUG > 2 ) {
+ if ( $verbose > 2 ) {
if (!$height) { $height = "?"; }
- print STDERR "skip bad ratio $_ ($width x $height)\n";
+ print STDERR "$progname: skip bad ratio " .
+ "$_ (${width}x$height)\n";
}
next;
}
my $url = $_;
if ( $unique_urls{$url} ) {
- if ( $DEBUG > 2 ) { print STDERR "skip duplicate image $_\n"; }
+ if ( $verbose > 2 ) {
+ print STDERR "$progname: skip duplicate image $_\n";
+ }
next;
}
- if ( $DEBUG > 2 ) {
- print STDERR "got $url" .
+ if ( $verbose > 2 ) {
+ print STDERR "$progname: got $url" .
($width && $height ? " (${width}x${height})" : "") .
($was_inline ? " (inline)" : "") . "\n";
}
}
if ( $#urls == 0 ) {
- if ( $DEBUG > 2 ) {
- print STDERR "no images on $base\n";
+ if ( $verbose > 2 ) {
+ print STDERR "$progname: no images on $base\n";
}
- return undef;
+ return ();
}
- return undef if ( $#urls < 1 );
+ return () if ( $#urls < 1 );
# pick a random element of the table
my $i = ((rand() * 99999) % $#urls);
- my $url = $urls[$i];
+ $url = $urls[$i];
- if ( $DEBUG > 2 ) {
- print STDERR "picked $url\n";
+ if ( $verbose > 2 ) {
+ print STDERR "$progname: picked $url\n";
}
return $url;
# Using the URL-randomizer, picks a random image on a random page, and
# returns two URLs: the page containing the image, and the image.
-# Returns undef if nothing found this time.
+# Returns () if nothing found this time.
#
sub pick_from_url_randomizer {
my ( $timeout ) = @_;
- if ( $DEBUG > 3 ) {
- print STDERR "\n\npicking from $random_redirector...\n\n";
+ if ( $verbose > 3 ) {
+ print STDERR "\n\n$progname: picking from $random_redirector...\n\n";
}
my ( $base, $body ) = get_document ($random_redirector, undef, $timeout);
my $img = pick_image_from_body ($base, $body);
if ($img) {
- return ($base, $img);
+ return ($base, $img, "yahoo");
} else {
- return undef;
+ return ();
}
}
# Using the image-randomizer, picks a random image on a random page, and
# returns two URLs: the page containing the image, and the image.
-# Returns undef if nothing found this time.
+# Returns () if nothing found this time.
#
sub pick_from_image_randomizer {
- my ( $timeout ) = @_;
+ my ( $timeout, $which ) = @_;
my $words = random_word;
$words .= "%20" . random_word;
$words .= "%20" . random_word;
$words .= "%20" . random_word;
- my $search_url = $image_randomizer . $words;
+ my $search_url = ($which == 0 ? $image_randomizer_1 :
+ $which == 1 ? $image_randomizer_2 :
+ $image_randomizer_3) .
+ $words;
+
+ # Pick a random search-result page instead of always taking the first.
+ # This assumes there are at least 10 pages...
+ if ($which == 0) {
+ $search_url .= "&pgno=" . (int(rand(9)) + 1);
+ } elsif ($which == 2) {
+ $search_url .= "&stq=" . (10 * (int(rand(9)) + 1));
+ }
- if ( $DEBUG > 3 ) {
- $_ = $words; s/%20/ /g; print STDERR "search words: $_\n";
+ if ( $verbose > 3 ) {
+ $_ = $words; s/%20/ /g; print STDERR "$progname: search words: $_\n";
}
- if ( $DEBUG > 3 ) {
- print STDERR "\n\npicking from $search_url\n";
+ if ( $verbose > 3 ) {
+ print STDERR "\n\n$progname: picking from $search_url\n";
}
my $start = time;
my ( $base, $body ) = get_document ($search_url, undef, $timeout);
if (defined ($timeout)) {
$timeout -= (time - $start);
- return undef if ($timeout <= 0);
+ return () if ($timeout <= 0);
}
- return undef if (! $body);
+ return () if (! $body);
my @subpages;
my $skipped = 0;
+ my $search_count = "?";
+ if ($which == 0 &&
+ $body =~ m@found (approximately |about )?(<B>)?(\d+)(</B>)? image@) {
+ $search_count = $3;
+ } elsif ($which == 1 && $body =~ m@<NOBR>((\d{1,3})(,\d{3})*) @i) {
+ $search_count = $1;
+ } elsif ($which == 2 && $body =~ m@found ((\d{1,3})(,\d{3})*|\d+) Web p@) {
+ $search_count = $1;
+ }
+ 1 while ($search_count =~ s/^(\d+)(\d{3})/$1,$2/);
+
+ my $length = length($body);
+ my $href_count = 0;
+
$_ = $body;
+ s/[\r\n\t ]+/ /g;
+
+ s/Result Pages:.*$//; # trim off page footer
+
s/(<A )/\n$1/gi;
foreach (split(/\n/)) {
+ $href_count++;
+ my ($u) = m@<A\s.*\bHREF\s*=\s*([^>]+)>@i;
+ next unless $u;
+ if ($u =~ m/^\"([^\"]*)\"/) { $u = $1; } # quoted string
+ elsif ($u =~ m/^([^\s]*)\s/) { $u = $1; } # or token
+
+ if ($which == 1) {
+ # Kludge to decode HotBot pages
+ next unless ($u =~ m@/director\.asp\?target=(http%3A[^&>]+)@);
+ $u = url_decode($1);
+ }
- if ( m@<A HREF=([^>]+)><IMG SRC=http://image\.altavista\.com@i ) {
+ next unless ($u =~ m@^http://@i); # skip non-http and relative urls.
- my $u = $1;
- if (m/^"(.*)"$/) { $u = $1; }
+ next if ($u =~ m@[/.]altavista\.com@i); # skip altavista builtins
+ next if ($u =~ m@[/.]digital\.com@i);
+ next if ($u =~ m@[/.]doubleclick\.net@i);
- if (m@\.corbis\.com/@) {
- $skipped = 1;
- if ( $DEBUG > 3 ) {
- print STDERR "skipping corbis URL: $_\n";
- }
- next;
- } elsif ( $DEBUG > 3 ) {
- print STDERR "sub-page: $1\n";
+ if ($which == 0 && $u =~ m@[/.]corbis\.com/@) {
+ $skipped = 1;
+ if ( $verbose > 3 ) {
+ print STDERR "$progname: skipping corbis URL: $u\n";
}
+ next;
- $subpages[++$#subpages] = $u;
+ } elsif ( $rejected_urls{$u} ) {
+ if ( $verbose > 3 ) {
+ my $L = $rejected_urls{$u};
+ print STDERR "$progname: pre-rejecting sub-page: $u\n";
+ }
+ next;
+
+ } elsif ( $verbose > 3 ) {
+ print STDERR "$progname: sub-page: $u\n";
}
+
+ $subpages[++$#subpages] = $u;
}
- if ( $#subpages <= 0 ) {
- if (!$skipped) {
- print STDERR "Found nothing on $base\n";
+ if ( $#subpages < 0 ) {
+ if (!$skipped && $verbose > 1) {
+ print STDERR "$progname: found nothing on $base " .
+ "($length bytes, $href_count links).\n";
}
- return undef;
+ return ();
}
# pick a random element of the table
- my $i = ((rand() * 99999) % $#subpages);
+ my $i = ((rand() * 99999) % ($#subpages + 1));
my $subpage = $subpages[$i];
- if ( $DEBUG > 3 ) {
- print STDERR "picked page $subpage\n";
+ if ( $verbose > 3 ) {
+ print STDERR "$progname: picked page $subpage\n";
}
my ( $base2, $body2 ) = get_document ($subpage, $base, $timeout);
- return undef if (!$base2 || !body2);
+ return () if (!$base2 || !$body2);
my $img = pick_image_from_body ($base2, $body2);
if ($img) {
- return ($base2, $img);
+ return ($base2, $img,
+ ($which == 0 ? "imagevista" :
+ $which == 1 ? "hotbot" : "altavista") .
+ "/$search_count");
} else {
- return undef;
+ return ();
}
}
# Picks a random image on a random page, and returns two URLs:
# the page containing the image, and the image.
-# Returns undef if nothing found this time.
+# Returns () if nothing found this time.
# Uses the url-randomizer 1 time in 5, else the image randomizer.
#
+my $total_0 = 0;
+my $total_1 = 0;
+my $total_2 = 0;
+my $total_3 = 0;
+my $count_0 = 0;
+my $count_1 = 0;
+my $count_2 = 0;
+my $count_3 = 0;
+
sub pick_image {
my ( $timeout ) = @_;
- if (int(rand 5) == 0) {
- return pick_from_url_randomizer ($timeout);
+ my $r = int(rand(100));
+ my ($base, $img, $source, $total, $count);
+
+ if ($r < 20) {
+ ($base, $img, $source) = pick_from_url_randomizer ($timeout);
+ $total = ++$total_0;
+ $count = ++$count_0 if $img;
+
+ } elsif ($r < 60) {
+ ($base, $img, $source) = pick_from_image_randomizer ($timeout, 0);
+ $total = ++$total_1;
+ $count = ++$count_1 if $img;
+
+# } elsif ($r < 80) {
+# # HotBot sucks: 98% of the time, it says "no pages match your
+# # search", and then if I load the URL again by hand, it works.
+# # I don't understand what's going wrong here, but we're not getting
+# # any good data back from them, so forget it for now.
+#
+# ($base, $img, $source) = pick_from_image_randomizer ($timeout, 1);
+# $total = ++$total_2;
+# $count = ++$count_2 if $img;
+
} else {
- return pick_from_image_randomizer ($timeout);
+ ($base, $img, $source) = pick_from_image_randomizer ($timeout, 2);
+ $total = ++$total_3;
+ $count = ++$count_3 if $img;
+ }
+
+ if ($source && $total > 0) {
+ $source .= " " . int(($count / $total) * 100) . "%";
}
+ return ($base, $img, $source);
+}
+
+
+# Does %-decoding.
+#
+sub url_decode {
+ ($_) = @_;
+ tr/+/ /;
+ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
+ return $_;
}
my ($body) = @_;
my $type = substr($body, 0, 6);
my $s;
- return undef unless ($type =~ /GIF8[7,9]a/);
+ return () unless ($type =~ /GIF8[7,9]a/);
$s = substr ($body, 6, 10);
my ($a,$b,$c,$d) = unpack ("C"x4, $s);
return (($b<<8|$a), ($d<<8|$c));
my $i = 0;
my $L = length($body);
- $c1 = substr($body, $i, 1); $i++;
- $c2 = substr($body, $i, 1); $i++;
- return undef unless (ord($c1) == 0xFF && ord($c2) == 0xD8);
+ my $c1 = substr($body, $i, 1); $i++;
+ my $c2 = substr($body, $i, 1); $i++;
+ return () unless (ord($c1) == 0xFF && ord($c2) == 0xD8);
my $ch = "0";
while (ord($ch) != 0xDA && $i < $L) {
my $s = substr($body, $i, 2); $i += 2;
my ($c1, $c2) = unpack ("C"x2, $s);
my $length = ($c1 << 8) | $c2;
- return undef if ($length < 2);
+ return () if ($length < 2);
$i += $length-2;
}
}
- return undef;
+ return ();
}
# Given the raw body of a GIF or JPEG document, returns the dimensions of
return undef;
}
-##############################################################################
-#
-# Running as a CGI
-#
-##############################################################################
-
-my $body_tag = "<BODY BGCOLOR=\"#000000\" TEXT=\"#DDFFDD\"\n" .
- " LINK=\"#00EEEE\" VLINK=\"#EEEE00\" ALINK=\"#FF0000\">\n";
-
-my $html_document =
- ("" .
- "<HTML>\n" .
- "<HEAD>\n" .
- " <TITLE>WebCollage</TITLE>\n" .
- "\n" .
- "</HEAD>\n" .
- $body_tag .
- "\n" .
- "<CENTER><FONT SIZE=1><BR></FONT>" .
- "<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=720>\n" .
- " <TR>\n" .
- " <TD ALIGN=CENTER VALIGN=TOP NOWRAP>\n" .
- " <FONT SIZE=\"+3\"><B>WebCollage: </B></FONT>\n" .
- " <FONT SIZE=\"-1\"><BR><B>by\n" .
- " <A HREF=\"http://www.jwz.org/\">Jamie Zawinski</A></B>\n" .
- " </TD>\n" .
- " <TD ALIGN=LEFT VALIGN=TOP>\n" .
- "\n" .
- " <P><FONT SIZE=\"+3\"><B>Exterminate All Rational Thought.\n" .
- " </B></FONT>\n" .
- " <BR>This program creates collages out of random images\n" .
- " found on the Web.\n" .
- " <P>More images are being added to the\n" .
- " collage now: please wait for the image below to load.\n" .
- " This will take a minute or two, since it has to contact\n" .
- " other web sites to retrieve the images before it can construct\n" .
- " the collage. Once the image below is loaded, you can reload\n" .
- " this page to do it again.\n" .
- " <P>If you enjoy this, you might also enjoy\n" .
- " <A HREF=\"http://www.jwz.org/dadadodo/\">DadaDodo</A>.\n" .
- " WebCollage also works as a screen saver, for those of you\n" .
- " using Unix: it is included with the\n" .
- " <A HREF=\"http://www.jwz.org/xscreensaver/\">XScreenSaver</A>\n" .
- " package.<P>\n" .
- " </TD>\n" .
- " </TR>\n" .
- " <TR>\n" .
- " <TD COLSPAN=2 VALIGN=TOP ALIGN=CENTER><TABLE \n" .
- " BORDER=2 WIDTH=%%WIDTH%% HEIGHT=%%HEIGHT%% \n" .
- " CELLPADDING=0 CELLSPACING=0>\n" .
- " <TR><TD BGCOLOR=\"#C0C0C0\">\n" .
- " %%MAP%%\n" .
- " <A NAME=\"#image\">\n" .
- " <IMG SRC=\"%%IMAGE%%\" BORDER=0 \n" .
- " WIDTH=%%WIDTH%% HEIGHT=%%HEIGHT%% \n" .
- " USEMAP=\"#collage\"></A></TD></TR>\n" .
- " </TABLE></TD>\n" .
- " </TR>\n" .
- "</TABLE>\n" .
- "<P>\n" .
- "</CENTER>\n");
-
-
-my @time_fmt_days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
-my @time_fmt_months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
-
-# Converts a time_t to a string acceptable to HTTP.
-#
-sub format_http_time {
- my ($time) = @_;
- my @t = gmtime($time);
- my ($sec, $min, $hour, $mday, $mon, $year, $wday) = @t;
- $year += 1900;
- $wday = $time_fmt_days[$wday];
- $mon = $time_fmt_months[$mon];
- return sprintf("%s, %02d %s %d %02d:%02d:%02d GMT",
- $wday, $mday, $mon, $year, $hour, $min, $sec);
-}
-
-
-# Parses exactly the time format that HTTP requires, no more, no less.
-#
-sub parse_http_time {
+# Like rand(), but chooses numbers with a bell curve distribution.
+sub bellrand {
($_) = @_;
-
- if (!m/^[SMTWF][a-z][a-z]+, (\d\d)[- ]([JFMAJSOND][a-z][a-z]+)[- ](\d\d\d?\d?)[- ](\d\d):(\d\d):(\d\d)( GMT)?$/o) {
- return undef;
- }
-
- my @moy = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
- @moy{@moy} = (1..12);
-
- my $t = Time::Local::timegm($6, $5, $4, $1, $moy{$2}-1,
- ($3 < 100 ? $3 : $3-1900));
- return ($t < 0 ? undef : $t);
-}
-
-
-# Given a modification time, returns a time_t to use as the expiration time
-# of both the HTML and the JPEG.
-#
-sub compute_expires_time {
- my ($mod_time) = (@_);
- my $now = time;
- if ($mod_time < $now) { $mod_time = $now; }
- return $mod_time + $max_age;
+ $_ = 1.0 unless defined($_);
+ $_ /= 3.0;
+ return (rand($_) + rand($_) + rand($_));
}
-# Parse the If-Modified-Since header, and write a response if appropriate.
-# If this returns 1, we're done.
+##############################################################################
#
-sub do_ifmod {
- # see http://vancouver-webpages.com/proxy/log-tail.pl and
- # http://mnot.cbd.net.au/cache_docs/ for clues about how to
- # do cacheing properly with CGI-generated documents.
- my ($mod_time) = (@_);
- if ($ENV{HTTP_IF_MODIFIED_SINCE}) {
- my $ims = $ENV{HTTP_IF_MODIFIED_SINCE};
- $ims =~ s/;.*// ; # lose trailing "; length=3082"
- $ims = parse_http_time($ims);
- if ($ims && $mod_time <= $ims) {
- print "Status: 304 Not Modified\n\n" ;
- return 1;
- }
- }
- return 0;
-}
-
-
-# Returns N urls of images (and the pages on which they were found.)
-# Unless there is a significant surplus of URLs in the $pending_file,
-# this will spend $url_generation_time seconds generating as many URLs
-# as it can. The first N will be returned, and the rest will be left
-# in the file.
+# Generating a list of urls only
#
-sub get_image_urls {
- my ($count) = @_;
-
- my @urls;
- my $body = "";
- my $file_count = 0;
-
- local *PEND;
-
- # Open and lock the file (read/write.)
- # rewind after locking, in case we had to wait for the lock.
- #
- open (PEND, "+<$pending_file") || die "couldn't open $pending_file: $!";
-
- if ($DEBUG > 2) { print STDERR "jpeg: opened $pending_file\n"; }
-
- my $flock_wait = time;
- flock (PEND, LOCK_EX) || die "couldn't lock $pending_file: $!";
- $flock_wait = (time - $flock_wait);
-
- seek (PEND, 0, 0) || die "couldn't rewind $pending_file: $!";
-
- if ($DEBUG > 2) { print STDERR "jpeg: locked $pending_file\n"; }
-
-
- # Take N URLs off the top, and leave the rest.
- #
- while (<PEND>) {
- if (--$count >= 0) {
- if ($DEBUG > 3) { print STDERR " < $_"; }
- s/[\r\n]+$//;
- $urls[++$#urls] = $_;
- } else {
- $body .= $_;
- if ($DEBUG > 3) { print STDERR " - $_"; }
- $file_count++;
- }
- }
-
- # rewind and overwrite the file
- seek (PEND, 0, 0) || die "couldn't rewind $pending_file: $!";
- truncate (PEND, 0) || die "couldn't truncate $pending_file: $!";
- print PEND $body;
-
-
- # If there are fewer than 3x as many URLs as we took left in the file,
- # then generate as many URLs as we can in N seconds. Take what we
- # need from that, and append the rest to the file. Note that we are
- # still holding a lock on the file.
- #
- # Count the time spent waiting for flock as time spent gathering URLs.
- # Because that means someone else was doing it.
- #
- $body = "";
- if ($file_count < $count * 3) {
- my $timeout = $url_generation_time - $flock_wait;
- my $start = time;
-
- while (1) {
- last if ($timeout <= 0);
-
- if ($DEBUG > 2) { print STDERR "time remaining: $timeout\n"; }
- my ($base, $img) = pick_image ($timeout);
-
- if ($img) {
- $img =~ s/ /%20/g;
- $base =~ s/ /%20/g;
- $_ = "$img $base";
- if ($count-- >= 0) {
- if ($DEBUG > 3) { print STDERR " << $img\n"; }
- $urls[++$#urls] = $_;
- } else {
- if ($DEBUG > 3) { print STDERR " >> $img\n"; }
- print PEND "$_\n"; # append to file
- $file_count++;
- }
- }
+##############################################################################
- my $now = time;
- my $elapsed = $now - $start;
- $timeout -= $elapsed;
- $start = $now;
+sub url_only_output {
+ do {
+ my ($base, $img) = pick_image;
+ if ($img) {
+ $base =~ s/ /%20/g;
+ $img =~ s/ /%20/g;
+ print "$img $base\n";
}
- }
-
- my $of = select(PEND); $| = 1; select($of); # flush output
- print PEND "";
-
- flock (PEND, LOCK_UN) || die "couldn't unlock $pending_file: $!";
- close (PEND) || die "couldn't close $pending_file: $!";
-
- if ($DEBUG > 2) {
- print STDERR "jpeg: closed $pending_file; $file_count urls in file;" .
- " returning $#urls.\n";
- }
-
- return @urls;
+ } while (1);
}
+##############################################################################
+#
+# Running as an xscreensaver module
+#
+##############################################################################
-sub cgi_reset_all_files {
- foreach (@all_files) {
- my $file = $_;
- local *OUT;
- open (OUT, "+<$file") || die "couldn't open $file: $!";
- flock (OUT, LOCK_EX) || die "couldn't lock $file: $!";
- truncate (OUT, 0) || die "couldn't truncate $file: $!";
- flock (OUT, LOCK_UN) || die "couldn't unlock $file: $!";
- close (OUT) || die "couldn't close $file: $!";
- }
-
- system "ppmmake '#000000' $img_width $img_height > $image_ppm" ||
- die "failed to create blank $image_ppm file: $!";
- system "cjpeg -progressive $image_ppm > $image_jpg" ||
- die "failed to create blank $image_jpg file: $!";
+sub x_cleanup {
+ my ($sig) = @_;
+ if ($verbose > 0) { print STDERR "$progname: caught signal $sig.\n"; }
+ unlink $image_ppm, $image_tmp1, $image_tmp2;
+ exit 1;
}
-# Given the URL of an image and the page on which it was found, this will
-# load the image, and paste it at a random spot in $image_ppm and $img_jpg.
-# It will also update $map_file to contain the appropriate referer, and
-# will limit it to $max_map_entries lines.
+# Like system, but prints status about exit codes, and kills this process
+# with whatever signal killed the sub-process, if any.
#
-sub cgi_paste_image {
- my ($img, $referer) = @_;
-
- my ( $base, $body ) = get_document ($img, $referer);
- return if (!$base || !$body);
-
- my ($iw, $ih) = image_size ($body);
- return if (!$iw || !$ih);
-
- if ($DEBUG > 2) { print STDERR "got $base ($iw x $ih)\n"; }
-
- my $cmd;
-
- if ($base =~ m/\.gif$/i) {
- $cmd = "giftopnm";
- } else {
- $cmd = "djpeg";
- }
-
- if ($iw > $img_width || $ih > $img_height) {
- while ($iw > $img_width || $ih > $img_height) {
- $iw = int($iw / 2);
- $ih = int($ih / 2);
- }
- $cmd .= " | pnmscale -xysize $iw $ih";
- }
-
- my $x = int (rand() * ($img_width - $iw));
- my $y = int (rand() * ($img_height - $ih));
-
- $cmd .= " | pnmpaste - $x $y $image_ppm";
-
-
- local *MAP;
- local *PIPE_OUT;
-
- # Open and lock the map (read/write.)
- # rewind after locking, in case we had to wait for the lock.
- # This lock doubles as our lock on the image file itself.
- #
- open (MAP, "+<$map_file") || die "couldn't open $map_file: $!";
-
- if ($DEBUG > 2) { print STDERR "jpeg: opened $map_file\n"; }
-
- flock (MAP, LOCK_EX) || die "couldn't lock $map_file: $!";
- seek (MAP, 0, 0) || die "couldn't rewind $map_file: $!";
-
- if ($DEBUG > 2) { print STDERR "jpeg: locked $map_file\n"; }
-
- # Read in the first hundred lines of the map file.
- #
- my $map = "";
- my $count = 0;
- while (<MAP>) {
- last if ($count++ > $max_map_entries);
- $map .= $_;
+sub nontrapping_system {
+ $! = 0;
+
+ if ($verbose > 1) {
+ $_ = join(" ", @_);
+ s/\"[^\"]+\"/\"...\"/g;
+ print STDERR "$progname: executing \"$_\"\n";
}
- # Add this entry to the front of the map data.
- #
- $map = "$x $y $iw $ih $referer\n" . $map;
+ my $rc = system @_;
-
- # Ensure that the $image_ppm file exists and has a ppm in it.
- #
- my $ppm_size = $img_width * $img_height * 3 * 2;
- my $s = (stat($image_ppm))[7];
- if ($s < $ppm_size) {
-
- if ( $DEBUG ) {
- print STDERR "$image_ppm is $s bytes;" .
- " should be at least $ppm_size\n";
- print STDERR "resetting everything.";
- cgi_reset_all_files();
+ if ($rc == 0) {
+ if ($verbose > 1) {
+ print STDERR "$progname: subproc exited normally.\n";
}
- }
-
- # Paste the bits into the image. Note that the map file is still locked.
- #
- local *TMP;
- open (TMP, ">$image_tmp") || die "couldn't open $image_tmp: $!";
- close (TMP);
-
- if (! $DEBUG ) {
- $cmd = "( $cmd ) 2>/dev/null";
- }
-
- $cmd .= " > $image_tmp";
- if ($DEBUG > 2) { print STDERR "executing $cmd\n"; }
-
- if (open(PIPE_OUT, "| $cmd")) {
- print PIPE_OUT $body;
- close(PIPE_OUT);
-
- if ($DEBUG > 2) { system "ls -ldF $image_tmp >&2"; }
-
- my @tmp_stat = stat($image_tmp);
- if (@tmp_stat && $tmp_stat[7] < 200) {
-# unlink ($image_tmp) || die "couldn't unlink $image_tmp: $!";
- open (OUT, ">$image_tmp") || die "$image_tmp unwritable: $!";
- close (OUT);
- if ($DEBUG > 2) { print STDERR "FAILED writing $image_ppm\n"; }
- } else {
-# rename ($image_tmp, $image_ppm) ||
-# die "couldn't rename $image_tmp to $image_ppm: $!";
- local *IN;
- local *OUT;
- open (IN, "+<$image_tmp") || die "$image_tmp unreadable: $!";
- open (OUT, ">$image_ppm") || die "$image_ppm unwritable: $!";
- while (<IN>) { print OUT $_; }
- truncate (IN, 0) || die "couldn't truncate $image_tmp: $!";
- close (IN);
- close (OUT) || die "couldn't write $image_ppm: $!";
- if ($DEBUG > 2) { print STDERR "wrote $image_ppm\n"; }
-
-
- # Now convert the PPM to a JPEG.
- #
- system "cjpeg -progressive $image_ppm > $image_tmp 2>/dev/null";
-
- @tmp_stat = stat($image_tmp);
- if (@tmp_stat && $tmp_stat[7] < 200) {
-# unlink ($image_tmp) || die "couldn't unlink $image_tmp: $!";
- open (OUT, ">$image_tmp") || die "$image_tmp unwritable: $!";
- close (OUT);
- if ($DEBUG > 2) { print STDERR "FAILED writing $image_jpg\n"; }
- } else {
-# rename ($image_tmp, $image_ppm) ||
-# die "couldn't rename $image_tmp to $image_ppm: $!";
- open (IN, "+<$image_tmp") || die "$image_tmp unreadable: $!";
- open (OUT, ">$image_jpg") || die "$image_jpg unwritable: $!";
- while (<IN>) { print OUT $_; }
- truncate (IN, 0) || die "couldn't truncate $image_tmp: $!";
- close (IN);
- close (OUT) || die "couldn't write $image_jpg: $!";
- if ($DEBUG > 2) { print STDERR "wrote $image_jpg\n"; }
+ } elsif (($rc & 0xff) == 0) {
+ $rc >>= 8;
+ if ($verbose) {
+ print "$progname: subproc exited with status $rc.\n";
+ }
+ } else {
+ if ($rc & 0x80) {
+ if ($verbose) {
+ print "$progname: subproc dumped core.\n";
}
+ $rc &= ~0x80;
}
-
- # Overwrite the map data.
- #
- seek (MAP, 0, 0) || die "couldn't rewind $map_file: $!";
- truncate (MAP, 0) || die "couldn't truncate $map_file: $!";
- print MAP $map;
- }
-
- my $of = select(MAP); $| = 1; select($of); # flush output
- print MAP "";
-
- flock (MAP, LOCK_UN) || die "couldn't unlock $map_file: $!";
- close (MAP) || die "couldn't close $map_file: $!";
-
- if ($DEBUG > 2) { print STDERR "jpeg: closed $map_file\n"; }
-}
-
-
-sub cgi_generate_image {
-
- $SIG{PIPE} = 'IGNORE';
-
- my @urls = get_image_urls ($pastes_per_load);
- my $end_time = time + $image_retrieval_time;
-
- if ($DEBUG > 2) {
- print STDERR "loading $#urls images\n";
- }
-
- foreach (@urls) {
- my ($img, $referer) = m/^([^ ]+) ([^ ]+)/;
- if ($img) {
- cgi_paste_image ($img, $referer);
+ if ($verbose) {
+ print "$progname: subproc died with signal $rc.\n";
}
- last if (time > $end_time);
+ # die that way ourselves.
+ kill $rc, $$;
}
-}
-
-
-sub cgi_sanity_check {
- my $error = undef;
- foreach (@all_files) {
- if (! -e $_) { $error = "$_ does not exist.\n"; }
- elsif (! -r $_) { $error = "$_ is unreadable.\n"; }
- elsif (! -w $_) { $error = "$_ is unwritable.\n"; }
- last if ($error);
- }
-
- return unless $error;
-
- print "Content-Type: text/html\n";
- print "\n\n<TITLE>Error</TITLE>$body_tag<H1>Error</H1>";
- print POSIX::getcwd() . "/" . $error . "<P>\n";
-
- $_ = join("</TT>, <TT>", @all_files);
- s/,([^,]*)$/, and$1/;
- print "Each of the files: <TT>$_</TT>\n";
- print " must exist and be readable and writable by the httpd process\n";
- print "(which probably means they must be globally readable and\n";
- print "writable, since on most systems, CGI scripts run as the\n";
- print "user <I>nobody</I>.)\n<P>\n";
-
- exit (0);
+ return $rc;
}
-# Write the encapsulating HTML document and associated HTTP headers.
-# This is fast -- it just writes out the wrapper document corresponding
-# to the data currently on disk. It is the loading of the sub-image
-# that does the real work.
+# Given the URL of a GIF or JPEG image, and the body of that image, writes a
+# PPM to the given output file. Returns the width/height of the image if
+# successful.
#
-sub cgi_emit_html_document {
-
- cgi_sanity_check;
-
- my $map_file_date;
- my $doc = $html_document;
-
- my $w2 = int ($img_width * $scale);
- my $h2 = int ($img_height * $scale);
- $doc =~ s/%%WIDTH%%/$w2/g;
- $doc =~ s/%%HEIGHT%%/$h2/g;
-
- local *MAP;
- open (MAP, "<$map_file") || die "couldn't open $map_file: $!";
- if ($DEBUG > 2) { print STDERR "html: opened $map_file\n"; }
-
- flock (MAP, LOCK_SH) || die "couldn't lock $map_file: $!";
- seek (MAP, 0, 0) || die "couldn't rewind $map_file: $!";
- if ($DEBUG > 2) { print STDERR "html: locked $map_file\n"; }
-
- $map_file_date = (stat(MAP))[9];
-
- my $map = "<MAP NAME=\"collage\">\n";
- while (<MAP>) {
- my ($x, $y, $w, $h, $url) =
- m/^([0-9]+) ([0-9]+) ([0-9]+) ([0-9]+) (.*)$/;
- if ($w && $h) {
- $x = int($x * $scale);
- $y = int($y * $scale);
- $w = int($w * $scale);
- $h = int($h * $scale);
-
- # protect against URLs that contain <, >, or ".
- $url =~ s/([<>\"])/uc sprintf("%%%02X",ord($1))/eg;
-
- my $x2 = $x + $w;
- my $y2 = $y + $h;
- $map .=
- "<AREA SHAPE=RECT COORDS=\"$x,$y,$x2,$y2\" HREF=\"$url\">\n";
- }
- }
- $map .= "</MAP>";
- flock (MAP, LOCK_UN) || die "couldn't unlock $map_file: $!";
- close (MAP) || die "couldn't close $map_file: $!";
-
- if ($DEBUG > 2) { print STDERR "html: closed $map_file\n"; }
-
- $doc =~ s/%%MAP%%/$map/g;
-
- my $img_name = "current";
+sub image_to_pnm {
+ my ($url, $body, $output) = @_;
+ my ($cmd, $cmd2, $w, $h);
- $doc =~ s@%%IMAGE%%@images/$img_name.jpg@g;
-
-
- my $mod_time = $map_file_date;
- if ($script_date > $mod_time) { $mod_time = $script_date; }
-
- if (do_ifmod($mod_time)) {
- return;
- }
-
- my $exp = compute_expires_time($mod_time);
-
- print "Content-Type: text/html\n";
- print "Content-Length: " . length($doc) . "\n";
- print "Last-Modified: " . format_http_time($mod_time) . "\n";
-
- # This is a suggestion to consider the object invalid after the given
- # date. This is sometimes ignored.
- #
- print "Expires: " . format_http_time($exp) . "\n";
-
- # This may or may not cause a cacheing proxy to pass this stuff along.
- # It's not standardized, but was historically used for... something.
- print "Pragma: no-cache\n";
-
- # This says the same thing as the Expires header, but it is a stronger
- # assertion that we're serious and should be listened to.
- #
- my $age = $exp - time;
- print "Cache-Control: max-age=$age, must-revalidate\n";
-
- print "\n";
- print $doc;
-}
-
-
-# Write the interior JPEG document and associated HTTP headers.
-#
-sub cgi_emit_jpeg_document {
-
- my $image_data = "";
- my $jpg_file_date;
- my $do_ims = 0;
-
- # The map file is the means by which we hold write-locks on the image
- # file. So first obtain the lock on that file.
- #
- local *MAP;
- open (MAP, "+<$map_file") || die "couldn't open $map_file: $!";
-
- if ($DEBUG > 2) { print STDERR "jpeg: opened $map_file\n"; }
- flock (MAP, LOCK_SH) || die "couldn't lock $map_file: $!";
- if ($DEBUG > 2) { print STDERR "jpeg: locked $map_file\n"; }
-
- # Now we have exclusive access to the image file. Read it.
- #
- local *IMG;
- open (IMG, "<$image_jpg") || die "couldn't open $image_jpg: $!";
-
- $jpg_file_date = (stat(IMG))[9];
-
- if (do_ifmod($jpg_file_date)) {
- $do_ims = 1;
- if ($DEBUG > 2) {
- my $ims = $ENV{HTTP_IF_MODIFIED_SINCE};
- $ims =~ s/;.*//;
- print STDERR "not-modified-since " .
- localtime(parse_http_time($ims)) . "\n";
- print STDERR "jpg date: " . localtime($jpg_file_date) . "\n";
- }
+ if ((@_ = gif_size ($body))) {
+ ($w, $h) = @_;
+ $cmd = "giftopnm";
+ } elsif ((@_ = jpeg_size ($body))) {
+ ($w, $h) = @_;
+ $cmd = "djpeg";
+ } else {
+ return ();
}
- if (!$do_ims) {
- while (<IMG>) { $image_data .= $_; }
+ $cmd2 = "exec $cmd"; # yes, this really is necessary. if we don't
+ # do this, the process doesn't die properly.
+ if ($verbose == 0) {
+ $cmd2 .= " 2>/dev/null";
}
- close (IMG) || die "couldn't close $image_jpg: $!";
-
- # Now free the lock so that others can write to the file.
- #
- flock (MAP, LOCK_UN) || die "couldn't unlock $map_file: $!";
- close (MAP) || die "couldn't close $map_file: $!";
- if ($DEBUG > 2) { print STDERR "jpeg: closed $map_file\n"; }
-
- return if ($do_ims);
-
- # At this point, we have the image data we will be returning.
- # However, don't return it yet -- first go off and generate the
- # *next* image, then we can return *this* one. If we don't do it
- # in this order, people will jump the gun hitting reload, and no
- # image updates will happen.
- #
- my $type = "image/jpeg";
- my $mod_time = $jpg_file_date;
- if ($script_date > $mod_time) { $mod_time = $script_date; }
-
- print "Last-Modified: " . format_http_time($mod_time) . "\n";
- print "Expires: " . format_http_time(compute_expires_time($mod_time))
- . "\n";
- print "Content-Type: $type\n";
- print "Content-Length: " . length($image_data) . "\n";
- print "\n";
-
- # Now, before returning the image data, go catatonic for a minute
- # while we load some URLs and make the next image.
+ # There exist corrupted GIF and JPEG files that can make giftopnm and
+ # djpeg lose their minds and go into a loop. So this gives those programs
+ # a small timeout -- if they don't complete in time, kill them.
#
- cgi_generate_image;
-
- # Done setting up for next time -- now finish loading.
- #
- print $image_data;
- $image_data = undef;
-}
-
-
-# Write the source code of this script as a text/plain document.
-#
-sub cgi_emit_source_document {
- my $mod_time = $script_date;
-
- if (do_ifmod($mod_time)) {
- return;
- }
-
- print "Content-Type: text/plain\n";
- print "Last-Modified: " . format_http_time($mod_time) . "\n";
- print "\n";
- open (IN, "<$argv0") || die "couldn't open $argv0: $!";
- while (<IN>) {
- print;
- }
- close (IN);
-}
-
-
-# Parse the various environment variables to decide how we were invoked,
-# and then do something about it.
-#
-sub cgi_main {
-
- $DEBUG=4;
-
- $ENV{PATH} .= ":/usr/local/bin";
-
- # make sure the various programs we execute exist, right up front.
- foreach ("ppmmake", "cjpeg", "djpeg", "giftopnm", "pnmpaste", "pnmscale") {
- if (!which ($_)) {
- print "Content-Type: text/html\n";
- print "\n\n<TITLE>Error</TITLE>$body_tag<H1>Error</H1>";
- print "The <TT>$_</TT> program was not found on \$PATH.<BR>\n";
-
- my $p = $ENV{PATH};
- $p =~ s/%/%25/g; $p =~ s/\&/%26/g;
- $p =~ s/</%3C/g; $p =~ s/>/%3E/g;
- $p =~ s/:/:<WBR>/g;
- print "\$PATH is: <TT>$p</TT><P>\n";
- exit (0);
- }
- }
-
- $script_date = (stat($argv0))[9];
-
- print "Blat: Foop\n";
-
- if ($ENV{REQUEST_METHOD} &&
- $ENV{REQUEST_METHOD} ne "GET" &&
- $ENV{REQUEST_METHOD} ne "HEAD" ) {
- print "Content-Type: text/html\n";
- print "\n\n<TITLE>Error</TITLE>$body_tag<H1>Error</H1>";
- $_ = $ENV{REQUEST_METHOD};
- print "bad request method: <TT>$_</TT>\n";
- exit (0);
-
- } elsif ( $ENV{QUERY_STRING} ) {
- if ( $ENV{QUERY_STRING} eq "reset" ) {
- cgi_reset_all_files;
+ my $pid;
+ @_ = eval {
+ my $timed_out;
- print "Content-Type: text/html\n";
- print "\n\n<TITLE>Collage Reset</TITLE>";
- print "$body_tag<H1>Collage Reset</H1><P>\n";
- exit (0);
+ local $SIG{ALRM} = sub {
+ if ($verbose > 0) {
+ print STDERR "$progname: timed out ($cvt_timeout) for " .
+ "$cmd on \"$url\" in pid $pid\n";
+ }
+ kill ('TERM', $pid) if ($pid);
+ $timed_out = 1;
+ };
+
+ if (($pid = open(PIPE, "| $cmd2 > $output"))) {
+ $timed_out = 0;
+ alarm $cvt_timeout;
+ print PIPE $body;
+ close PIPE;
+
+ if ($verbose > 3) { print STDERR "$progname: awaiting $pid\n"; }
+ waitpid ($pid, 0);
+ if ($verbose > 3) { print STDERR "$progname: $pid completed\n"; }
+
+
+ my $size = (stat($output))[7];
+ if ($size < 5) {
+ if ($verbose) {
+ print STDERR "$progname: $cmd on ${w}x$h \"$url\" failed" .
+ " ($size bytes)\n";
+ }
+ return ();
+ }
+ if ($verbose > 1) {
+ print STDERR "$progname: created ${w}x$h $output ($cmd)\n";
+ }
+ return ($w, $h);
} else {
- print "Content-Type: text/html\n";
- print "\n\n<TITLE>Error</TITLE>$body_tag<H1>Error</H1>";
- $_ = $ENV{QUERY_STRING};
- print "malformed URL: <TT>$_</TT>\n";
- exit (0);
+ print STDERR "$progname: $cmd failed: $!\n";
+ return ();
}
-
- } elsif ( !$ENV{PATH_INFO} || $ENV{PATH_INFO} eq "" ) {
- # don't allow /webcollage as a URL -- force it to be /webcollage/
- print "Status: 301 Moved Permanently\n";
- print "Location: http://" .
- ($ENV{HTTP_HOST} ? $ENV{HTTP_HOST} :
- $ENV{SERVER_NAME} ? $ENV{SERVER_NAME} : "???") .
- ($ENV{REQUEST_URI} ? $ENV{REQUEST_URI} : "") .
- "/\n\n";
- exit (0);
-
- } elsif ( $ENV{PATH_INFO} eq "/" ) {
- cgi_emit_html_document;
-
- } elsif ( $ENV{PATH_INFO} =~ m@^/images/[^/]+\.jpg$@ ) {
- cgi_emit_jpeg_document;
-
- } elsif ( $ENV{PATH_INFO} eq "/webcollage.pl" ) {
- cgi_emit_source_document;
-
+ };
+ die if ($@ && $@ ne "alarm\n"); # propagate errors
+ if ($@) {
+ # timed out
+ return ();
} else {
- print "Content-Type: text/html\n";
- print "\n\n<TITLE>Error</TITLE>$body_tag<H1>Error</H1>";
- $_ = $ENV{PATH_INFO};
- print "malformed URL: <TT>$_</TT>\n";
- exit (0);
+ # didn't
+ alarm 0;
+ return @_;
}
}
-
-##############################################################################
-#
-# Generating a list of urls only
-#
-##############################################################################
-
-sub url_only_output {
- $| = 1;
- do {
- my ($base, $img) = pick_image;
- if ($img) {
- $base =~ s/ /%20/g;
- $img =~ s/ /%20/g;
- print "$img $base\n";
- }
- } while (1);
-}
-
-##############################################################################
-#
-# Running as an xscreensaver module
-#
-##############################################################################
-
-my $image_tmp2;
-my $image_tmp3;
-
-sub x_cleanup {
- if ($DEBUG > 0) { print STDERR "caught signal\n"; }
- unlink $image_ppm, $image_tmp, $image_tmp2, $image_tmp3;
- exit 1;
-}
-
-
sub x_output {
my $win_cmd = $ppm_to_root_window_cmd;
# make sure the various programs we execute exist, right up front.
foreach ("ppmmake", "giftopnm", "djpeg", "pnmpaste", "pnmscale",
- $win_cmd) {
+ "pnmcut", $win_cmd) {
which ($_) || die "$progname: $_ not found on \$PATH.\n";
}
$_ = "xdpyinfo";
which ($_) || die "$progname: $_ not found on \$PATH.\n";
$_ = `$_`;
- ($img_width, $img_height) = m/dimensions: *([0-9]+)x([0-9]+) /;
+ ($img_width, $img_height) = m/dimensions: *(\d+)x(\d+) /;
}
my $bgcolor = "#000000";
$bgimage = $background;
} elsif (! $background =~ m@^[-a-z0-9 ]+$@i) {
- print STDERR "not a color or readable file: $background\n";
+ print STDERR "$progname: not a color or readable file: " .
+ "$background\n";
exit 1;
} else {
# default to assuming it's a color
# Create the sold-colored base image.
#
$_ = "ppmmake '$bgcolor' $img_width $img_height";
- if ($DEBUG > 1) {
- print STDERR "creating base image: $_\n";
+ if ($verbose > 1) {
+ print STDERR "$progname: creating base image: $_\n";
}
- system "$_ > $image_ppm";
+ nontrapping_system "$_ > $image_ppm";
# Paste the default background image in the middle of it.
#
if ($bgimage) {
my ($iw, $ih);
- if (open(IMG, "<$bgimage")) {
- $_ = <IMG>;
- $_ = <IMG>;
- ($iw, $ih) = m/^([0-9]+) ([0-9]+)$/;
- close (IMG);
+
+ my $body = "";
+ local *IMG;
+ open(IMG, "<$bgimage") || die ("couldn't open $bgimage: $!\n");
+ my $cmd;
+ while (<IMG>) { $body .= $_; }
+ close (IMG);
+ if ((@_ = gif_size ($body))) {
+ ($iw, $ih) = @_;
+ $cmd = "giftopnm |";
+ } elsif ((@_ = jpeg_size ($body))) {
+ ($iw, $ih) = @_;
+ $cmd = "djpeg |";
+ } elsif ($body =~ "^P\d\n(\d+) (\d+)\n") {
+ $iw = $1;
+ $ih = $2;
+ $cmd = "";
+ } else {
+ die "$progname: $bgimage is not a GIF, JPEG, or PPM.\n";
}
- my $x = int (($img_width - $iw) / 2);
+
+ my $x = int (($img_width - $iw) / 2);
my $y = int (($img_height - $ih) / 2);
- if ($DEBUG > 1) {
- print STDERR "pasting $bgimage into base image at $x, $y\n";
+ if ($verbose > 1) {
+ print STDERR "$progname: pasting $bgimage (${iw}x$ih) into base ".
+ "image at $x,$y\n";
}
- system "pnmpaste $bgimage $x $y $image_ppm > $image_tmp2" .
- " && mv $image_tmp2 $image_ppm";
- }
-
- do {
- my ($base, $img) = pick_image;
+ $cmd .= "pnmpaste - $x $y $image_ppm > $image_tmp1";
+ open (IMG, "| $cmd") || die ("running $cmd: $!\n");
+ print IMG $body;
+ close (IMG);
+ if ($verbose > 1) {
+ print STDERR "$progname: subproc exited normally.\n";
+ }
+ rename ($image_tmp1, $image_ppm) ||
+ die ("renaming $image_tmp1 to $image_ppm: $!\n");
+ }
- my ($headers, $body);
+ while (1) {
+ my ($base, $img, $source) = pick_image();
if ($img) {
- ($headers, $body) = get_document ($img, $base);
+ my ($headers, $body) = get_document ($img, $base);
+ if ($body) {
+ handle_image ($base, $img, $body, $source);
+ }
}
+ unlink $image_tmp1, $image_tmp2;
+ sleep $delay;
+ }
+}
- if ($body) {
+sub handle_image {
+ my ($base, $img, $body, $source) = @_;
- if ($DEBUG > 0) {
- print STDERR "got $img (" . length($body) . ")\n";
- }
+ if ($verbose > 1) {
+ print STDERR "$progname: got $img (" . length($body) . ")\n";
+ }
- my $cmd;
- if ($img =~ m/\.gif/i) {
- $cmd = "giftopnm";
- } else {
- $cmd = "djpeg";
- }
+ my ($iw, $ih) = image_to_pnm ($img, $body, $image_tmp1);
+ return 0 unless ($iw && $ih);
- if ($DEBUG == 0) {
- $cmd .= " 2>/dev/null";
- }
+ my $ow = $iw; # used only for error messages
+ my $oh = $ih;
- if (open(PIPE, "| $cmd > $image_tmp")) {
- print PIPE $body;
- close PIPE;
+ # don't just tack this onto the front of the pipeline -- we want it to
+ # be able to change the size of the input image.
+ #
+ if ($filter_cmd) {
+ if ($verbose > 1) {
+ print STDERR "$progname: running $filter_cmd\n";
+ }
- if ($DEBUG > 1) {
- print STDERR "created $image_tmp ($cmd)\n";
- }
+ my $rc = nontrapping_system "($filter_cmd) < $image_tmp1 >$image_tmp2";
+ if ($rc != 0) {
+ if ($verbose) {
+ print STDERR "$progname: failed command: \"$filter_cmd\"\n";
+ print STDERR "$progname: failed url: \"$img\" (${ow}x$oh)\n";
}
+ return;
+ }
+ rename ($image_tmp2, $image_tmp1);
+
+ # re-get the width/height in case the filter resized it.
+ local *IMG;
+ open(IMG, "<$image_tmp1") || return 0;
+ $_ = <IMG>;
+ $_ = <IMG>;
+ ($iw, $ih) = m/^(\d+) (\d+)$/;
+ close (IMG);
+ return 0 unless ($iw && $ih);
+ }
- if (-s $image_tmp) {
+ my $target_w = $img_width;
+ my $target_h = $img_height;
- if ($filter_cmd) {
- if ($DEBUG > 1) {
- print STDERR "running $filter_cmd\n";
- }
- system "($filter_cmd) < $image_tmp > $image_tmp3" .
- " && mv $image_tmp3 $image_tmp";
- }
+ my $cmd = "";
- my ($iw, $ih);
- if (open(IMG, "<$image_tmp")) {
- $_ = <IMG>;
- $_ = <IMG>;
- ($iw, $ih) = m/^([0-9]+) ([0-9]+)$/;
- close (IMG);
- }
- if ($iw && $ih) {
+ # Usually scale the image to fit on the screen -- but sometimes scale it
+ # to fit on half or a quarter of the screen. Note that we don't merely
+ # scale it to fit, we instead cut it in half until it fits -- that should
+ # give a wider distribution of sizes.
+ #
+ if (rand() < 0.3) { $target_w /= 2; $target_h /= 2; }
+ if (rand() < 0.3) { $target_w /= 2; $target_h /= 2; }
- if ($DEBUG > 1) {
- print STDERR "image size is $iw x $ih\n";
- }
+ if ($iw > $target_w || $ih > $target_h) {
+ while ($iw > $target_w ||
+ $ih > $target_h) {
+ $iw = int($iw / 2);
+ $ih = int($ih / 2);
+ }
+ if ($iw <= 10 || $ih <= 10) {
+ if ($verbose > 1) {
+ print STDERR "$progname: scaling to ${iw}x$ih would " .
+ "have been bogus.\n";
+ }
+ return 0;
+ }
- if ($iw > $img_width || $ih > $img_height) {
- while ($iw > $img_width ||
- $ih > $img_height) {
- $iw = int($iw / 2);
- $ih = int($ih / 2);
- }
- if ($DEBUG > 1) {
- print STDERR "scaling to $iw x $ih\n";
- }
- system "pnmscale -xysize $iw $ih $image_tmp" .
- " > $image_tmp2" .
- " 2>/dev/null && mv $image_tmp2 $image_tmp";
- }
+ if ($verbose > 1) {
+ print STDERR "$progname: scaling to ${iw}x$ih\n";
+ }
- my $x = int (rand() * ($img_width - $iw));
- my $y = int (rand() * ($img_height - $ih));
+ $cmd .= " | pnmscale -xsize $iw -ysize $ih";
+ }
- if ($DEBUG > 1) {
- print STDERR "pasting at $x, $y in $image_ppm\n";
- }
- system "pnmpaste $image_tmp $x $y $image_ppm" .
- " > $image_tmp2" .
- " && mv $image_tmp2 $image_ppm";
+ my $src = $image_tmp1;
+ my $crop_x = 0; # the sub-rectangle of the image
+ my $crop_y = 0; # that we will actually paste.
+ my $crop_w = $iw;
+ my $crop_h = $ih;
- my $target = $image_ppm;
- if ($post_filter_cmd) {
- if ($DEBUG > 1) {
- print STDERR "running $post_filter_cmd\n";
- }
- system "($post_filter_cmd) < $image_ppm > $image_tmp3";
- $target = $image_tmp3;
- }
+ # The chance that we will randomly crop out a section of an image starts
+ # out fairly low, but goes up for images that are very large, or images
+ # that have ratios that make them look like banners (we try to avoid
+ # banner images entirely, but they slip through when the IMG tags didn't
+ # have WIDTH and HEIGHT specified.)
+ #
+ my $crop_chance = 0.2;
+ if ($iw > $img_width * 0.4 || $ih > $img_height * 0.4) {
+ $crop_chance += 0.2;
+ }
+ if ($iw > $img_width * 0.7 || $ih > $img_height * 0.7) {
+ $crop_chance += 0.2;
+ }
+ if ($min_ratio && ($iw * $min_ratio) > $ih) {
+ $crop_chance += 0.7;
+ }
- if (!$no_output_p) {
+ if ($verbose > 2 && $crop_chance > 0.1) {
+ print STDERR "$progname: crop chance: $crop_chance\n";
+ }
- my $tsize = (stat($target))[7];
- if ($tsize > 200) {
- $_ = $ppm_to_root_window_cmd;
- s/%%PPM%%/$target/;
+ if (rand() < $crop_chance) {
- if ($DEBUG > 1) {
- print STDERR "running $_\n";
- }
- system $_;
+ my $ow = $crop_w;
+ my $oh = $crop_h;
- } elsif ($DEBUG > 1) {
- print STDERR "$target size is $tsize\n";
- }
- }
- }
- }
- unlink $image_tmp, $image_tmp2, $image_tmp3;
+ if ($crop_w > $min_width) {
+ # if it's a banner, select the width linearly.
+ # otherwise, select a bell.
+ my $r = (($min_ratio && ($iw * $min_ratio) > $ih)
+ ? rand()
+ : bellrand());
+ $crop_w = $min_width + int ($r * ($crop_w - $min_width));
+ $crop_x = int (rand() * ($ow - $crop_w));
+ }
+ if ($crop_h > $min_height) {
+ # height always selects as a bell.
+ $crop_h = $min_height + int (bellrand() * ($crop_h - $min_height));
+ $crop_y = int (rand() * ($oh - $crop_h));
}
- sleep $delay;
+ if ($verbose > 1 &&
+ ($crop_x != 0 || $crop_y != 0 ||
+ $crop_w != $iw || $crop_h != $ih)) {
+ print STDERR "$progname: randomly cropping to " .
+ "${crop_w}x$crop_h \@ $crop_x,$crop_y\n";
+ }
+ }
- } while (1);
-}
+ # Where the image should logically land -- this might be negative.
+ #
+ my $x = int((rand() * ($img_width + $crop_w/2)) - $crop_w*3/4);
+ my $y = int((rand() * ($img_height + $crop_h/2)) - $crop_h*3/4);
+ # if we have chosen to paste the image outside of the rectangle of the
+ # screen, then we need to crop it.
+ #
+ if ($x < 0 ||
+ $y < 0 ||
+ $x + $crop_w > $img_width ||
+ $y + $crop_h > $img_height) {
+
+ if ($verbose > 1) {
+ print STDERR "$progname: cropping for effective paste of " .
+ "${crop_w}x$crop_h \@ $x,$y\n";
+ }
+
+ if ($x < 0) { $crop_x -= $x; $crop_w += $x; $x = 0; }
+ if ($y < 0) { $crop_y -= $y; $crop_h += $y; $y = 0; }
-sub x_main {
+ if ($x + $crop_w >= $img_width) { $crop_w = $img_width - $x - 1; }
+ if ($y + $crop_h >= $img_height) { $crop_h = $img_height - $y - 1; }
+ }
- # Unlike CGI, when running in X mode, the various tmp files should be
- # in the /tmp directory and should have gensymed names.
+ # If any cropping needs to happen, add pnmcut.
#
- $image_ppm = ($ENV{TMPDIR} ? $ENV{TMPDIR} : "/tmp") . "/webcollage." . $$;
- $image_tmp = $image_ppm . "-1";
- $image_tmp2 = $image_ppm . "-2";
- $image_tmp3 = $image_ppm . "-3";
+ if ($crop_x != 0 || $crop_y != 0 ||
+ $crop_w != $iw || $crop_h != $ih) {
+ $iw = $crop_w;
+ $ih = $crop_h;
+ $cmd .= " | pnmcut $crop_x $crop_y $iw $ih";
+ if ($verbose > 1) {
+ print STDERR "$progname: cropping to ${crop_w}x$crop_h \@ " .
+ "$crop_x,$crop_y\n";
+ }
+ }
+
+ if ($verbose > 1) {
+ print STDERR "$progname: pasting ${iw}x$ih \@ $x,$y in $image_ppm\n";
+ }
+
+ $cmd .= " | pnmpaste - $x $y $image_ppm";
+
+ $cmd =~ s@^ *\| *@@;
+ my $rc = nontrapping_system "($cmd) < $image_tmp1 > $image_tmp2";
- # In X mode, these aren't used. Set them to undef to error if we try.
+ if ($rc != 0) {
+ if ($verbose) {
+ print STDERR "$progname: failed command: \"$cmd\"\n";
+ print STDERR "$progname: failed url: \"$img\" (${ow}x$oh)\n";
+ }
+ return;
+ }
+
+ rename ($image_tmp2, $image_ppm) || return;
+
+ my $target = "$image_ppm";
+
+ # don't just tack this onto the end of the pipeline -- we don't want it
+ # to end up in $image_ppm, because we don't want the results to be
+ # cumulative.
#
- $data_dir = undef;
- $image_jpg = undef;
- $pending_file = undef;
- $map_file = undef;
- $url_generation_time = undef;
- $image_retrieval_time = undef;
- $max_map_entries = undef;
- $pastes_per_load = undef;
- $max_age = undef;
- $script_date = undef;
- @all_files = undef;
-
- # In X mode, these come either from the command line, or from the X server.
- $img_width = undef;
- $img_height = undef;
+ if ($post_filter_cmd) {
+ $target = $image_tmp1;
+ $rc = nontrapping_system "($post_filter_cmd) < $image_ppm > $target";
+ if ($rc != 0) {
+ if ($verbose) {
+ print STDERR "$progname: filter failed: " .
+ "\"$post_filter_cmd\"\n";
+ }
+ return;
+ }
+ }
+
+ if (!$no_output_p) {
+ my $tsize = (stat($target))[7];
+ if ($tsize > 200) {
+ $cmd = $ppm_to_root_window_cmd;
+ $cmd =~ s/%%PPM%%/$target/;
+
+ # xv seems to hate being killed. it tends to forget to clean
+ # up after itself, and leaves windows around and colors allocated.
+ # I had this same problem with vidwhacker, and I'm not entirely
+ # sure what I did to fix it. But, let's try this: launch xv
+ # in the background, so that killing this process doesn't kill it.
+ # it will die of its own accord soon enough. So this means we
+ # start pumping bits to the root window in parallel with starting
+ # the next network retrieval, which is probably a better thing
+ # to do anyway.
+ #
+ $cmd .= "&";
+
+ $rc = nontrapping_system ($cmd);
+
+ if ($rc != 0) {
+ if ($verbose) {
+ print STDERR "$progname: display failed: \"$cmd\"\n";
+ }
+ return;
+ }
+
+ } elsif ($verbose > 1) {
+ print STDERR "$progname: $target size is $tsize\n";
+ }
+ }
+
+ if ($verbose > 0) {
+ print STDOUT "image: ${iw}x${ih} @ $x,$y $base $source\n";
+ }
+
+ return 1;
+}
+sub main {
+ $| = 1;
+ srand(time ^ $$);
+
my $root_p = 0;
+ # historical suckage: the environment variable name is lower case.
+ $http_proxy = $ENV{http_proxy} || $ENV{HTTP_PROXY};
+
while ($_ = $ARGV[0]) {
shift @ARGV;
if ($_ eq "-display" ||
$urls_only_p = 1;
$no_output_p = 1;
} elsif ($_ eq "-verbose") {
- $DEBUG++;
+ $verbose++;
} elsif (m/^-v+$/) {
- $DEBUG += length($_)-1;
+ $verbose += length($_)-1;
} elsif ($_ eq "-delay") {
$delay = shift @ARGV;
} elsif ($_ eq "-timeout") {
$background = shift @ARGV;
} elsif ($_ eq "-size") {
$_ = shift @ARGV;
- if (m@^([0-9]+)x([0-9]+)$@) {
+ if (m@^(\d+)x(\d+)$@) {
$img_width = $1;
$img_height = $2;
} else {
die "$progname: argument to \"-size\" must be" .
" of the form \"640x400\"\n";
}
+ } elsif ($_ eq "-proxy" || $_ eq "-http-proxy") {
+ $http_proxy = shift @ARGV;
} else {
die "$copyright\nusage: $progname [-root]" .
" [-display dpy] [-root] [-verbose] [-timeout secs]\n" .
- "\t\t [-delay secs] [-filter cmd] [-filter2 cmd]\n";
+ "\t\t [-delay secs] [-filter cmd] [-filter2 cmd]\n" .
+ "\t\t [-http-proxy host[:port]]\n";
}
}
+ if ($http_proxy && $http_proxy eq "") {
+ $http_proxy = undef;
+ }
+ if ($http_proxy && $http_proxy =~ m@^http://([^/]*)/?$@ ) {
+ # historical suckage: allow "http://host:port" as well as "host:port".
+ $http_proxy = $1;
+ }
+
if (!$root_p && !$no_output_p) {
die "$copyright" .
"$progname: the -root argument is manditory (for now.)\n";
}
}
-
-##############################################################################
-#
-# Decide if we're in X or CGI mode, and dispatch.
-#
-##############################################################################
-
-sub main {
- srand(time ^ $$);
- if ( $progname =~ m/\.cgi$/i || $ENV{REQUEST_METHOD} ) {
- cgi_main;
- } else {
- x_main;
- }
-}
-
main;
exit (0);
--- /dev/null
+/*****************************************************************************
+ * *
+ * xsublim -- Submit. Conform. Obey. *
+ * *
+ * Copyright (c) 1999 Greg Knauss (greg@eod.com) *
+ * *
+ * Thanks to Jamie Zawinski, whose suggestions and advice made what was a *
+ * boring little program into a less boring (and a _lot_ less little) *
+ * program. *
+ * *
+ * 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. *
+ * *
+ * Stare into the subliminal for as long as you can... *
+ * *
+ *****************************************************************************/
+
+
+/* Warnings *******************************************************************
+
+ Please don't end this process with a SIGKILL. If it's got the X server
+ grabbed when you do, you'll never get it back and it won't be my fault.
+*/
+
+
+/* Arguments ******************************************************************
+
+ -font font Font to use
+ -delayShow ms Microsecs for display of each word
+ -delayWord ms Microsecs for blank between words
+ -delayPhraseMin ms Microsecs for min blank between phrases
+ -delayPhraseMax ms Microsecs for max blank between phrases
+ -random Show phrases in random order (Default)
+ -no-random Show phrases in listed order
+ -screensaver Wait for an active screensaver (Default)
+ -no-screensaver Draw over active windows
+ -outline Draw a contrasting outline around words (Default)
+ -no-outline Draw words without an outline
+*/
+
+
+/* Defines *******************************************************************/
+#define XSUBLIM_NAME "XSublim"
+#define XSUBLIM_TEXT_COUNT 1000
+#define XSUBLIM_TEXT_LENGTH 128
+#define XSUBLIM_TEXT_OUTLINE 1
+#define XSUBLIM_ARG_DELAYSHOW "delayShow"
+#define XSUBLIM_ARG_DELAYWORD "delayWord"
+#define XSUBLIM_ARG_DELAYPHRASEMIN "delayPhraseMin"
+#define XSUBLIM_ARG_DELAYPHRASEMAX "delayPhraseMax"
+#define XSUBLIM_ARG_RANDOM "random"
+#define XSUBLIM_ARG_FILE "file"
+#define XSUBLIM_ARG_SCREENSAVER "screensaver"
+#define XSUBLIM_ARG_OUTLINE "outline"
+#define XSUBLIM_ARG_CENTER "center"
+#define XSUBLIM_ARG_FONT "font"
+#define XSUBLIM_ARG_PHRASES "phrases"
+#ifndef TRUE
+#define FALSE 0
+#define TRUE 1
+#endif
+
+
+/* Includes ******************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <X11/Intrinsic.h>
+#include <X11/IntrinsicP.h>
+#include <X11/CoreP.h>
+#include <X11/Shell.h>
+#include <X11/StringDefs.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <X11/Xos.h>
+#include <X11/Xproto.h>
+#if defined(__sgi)
+#include <X11/SGIScheme.h>
+#endif
+
+#include "usleep.h"
+#include "resources.h"
+
+
+/* Globals *******************************************************************/
+char* progname;
+XtAppContext app;
+XrmDatabase db;
+char* progclass = XSUBLIM_NAME;
+char* defaults[] =
+{
+ ".background: #000000",
+ ".foreground: #FFFFFF",
+ "*" XSUBLIM_ARG_PHRASES ":"
+ "Submit.\\n"
+ "Conform.\\n"
+ "Obey.\\n"
+ "Consume.\\n"
+ "Be silent.\\n"
+ "Fear.\\n"
+ "Waste.\\n"
+ "Watch TV.\\n"
+ "Hate yourself.\\n"
+ "Buy needlessly.\\n"
+ "Despair quietly.\\n"
+ "God hates you.\\n"
+ "You are being watched.\\n"
+ "You will be punished.\\n"
+ "You serve no purpose.\\n"
+ "Your contributions are ignored.\\n"
+ "They are laughing at you.\\n"
+ "Surrender.\\n"
+ "You will fail.\\n"
+ "Never question.\\n"
+ "You are a prisoner.\\n"
+ "You are helpless.\\n"
+ "You are diseased.\\n"
+ "Fear the unknown.\\n"
+ "Happiness follows obedience.\\n"
+ "Ignorance is strength.\\n"
+ "War is peace.\\n"
+ "Freedom is slavery.\\n"
+ "Abandon all hope.\\n"
+ "You will be assimilated.\\n"
+ "Resistance is futile.\\n"
+ "Resistance is useless.\\n"
+ "Life is pain.\\n"
+ "No escape.\\n"
+ "What's that smell?\\n"
+ "All praise the company.\\n"
+ "Fnord.\\n",
+ "*" XSUBLIM_ARG_FONT ": -*-utopia-*-r-*-*-*-600-*-*-p-*-*-*",
+ "*" XSUBLIM_ARG_DELAYSHOW ": 40000",
+ "*" XSUBLIM_ARG_DELAYWORD ": 100000",
+ "*" XSUBLIM_ARG_DELAYPHRASEMIN ": 5000000",
+ "*" XSUBLIM_ARG_DELAYPHRASEMAX ": 20000000",
+ "*" XSUBLIM_ARG_RANDOM ": true",
+ "*" XSUBLIM_ARG_SCREENSAVER ": true",
+ "*" XSUBLIM_ARG_OUTLINE": true",
+ "*" XSUBLIM_ARG_CENTER": true",
+ NULL
+};
+XrmOptionDescRec options[] =
+{
+ {"-" XSUBLIM_ARG_FONT, "." XSUBLIM_ARG_FONT,
+ XrmoptionSepArg,0},
+ {"-" XSUBLIM_ARG_DELAYSHOW, "." XSUBLIM_ARG_DELAYSHOW,
+ XrmoptionSepArg,0},
+ {"-" XSUBLIM_ARG_DELAYWORD, "." XSUBLIM_ARG_DELAYWORD,
+ XrmoptionSepArg,0},
+ {"-" XSUBLIM_ARG_DELAYPHRASEMIN,"." XSUBLIM_ARG_DELAYPHRASEMIN,
+ XrmoptionSepArg,0},
+ {"-" XSUBLIM_ARG_DELAYPHRASEMAX,"." XSUBLIM_ARG_DELAYPHRASEMAX,
+ XrmoptionSepArg,0},
+ {"-" XSUBLIM_ARG_RANDOM, "." XSUBLIM_ARG_RANDOM,
+ XrmoptionNoArg,"true"},
+ {"-no-" XSUBLIM_ARG_RANDOM, "." XSUBLIM_ARG_RANDOM,
+ XrmoptionNoArg,"false"},
+ {"-" XSUBLIM_ARG_FILE, "." XSUBLIM_ARG_FILE,
+ XrmoptionSepArg,0 },
+ {"-" XSUBLIM_ARG_SCREENSAVER, "." XSUBLIM_ARG_SCREENSAVER,
+ XrmoptionNoArg,"true"},
+ {"-no-" XSUBLIM_ARG_SCREENSAVER,"." XSUBLIM_ARG_SCREENSAVER,
+ XrmoptionNoArg,"false"},
+ {"-" XSUBLIM_ARG_OUTLINE, "." XSUBLIM_ARG_OUTLINE,
+ XrmoptionNoArg,"true"},
+ {"-no-" XSUBLIM_ARG_OUTLINE, "." XSUBLIM_ARG_OUTLINE,
+ XrmoptionNoArg,"false"},
+ {"-" XSUBLIM_ARG_CENTER, "." XSUBLIM_ARG_CENTER,
+ XrmoptionNoArg,"true"},
+ {"-no-" XSUBLIM_ARG_CENTER, "." XSUBLIM_ARG_CENTER,
+ XrmoptionNoArg,"false"},
+ {NULL, NULL,
+ 0, 0 }
+};
+static int Xsublim_Sig_Last;
+
+
+/* Functions *****************************************************************/
+
+/* Defer signals to protect the server grab ================================ */
+void xsublim_Sig_Catch(int sig_Number)
+{
+ /* BSD needs this reset each time, and it shouldn't hurt anything
+ else */
+ signal(sig_Number,xsublim_Sig_Catch);
+ Xsublim_Sig_Last = sig_Number;
+}
+
+/* Get the screensaver's window ============================================ */
+static XErrorHandler Xsublim_Ss_Handler = NULL;
+static int Xsublim_Ss_Status;
+
+/* This was all basically swiped from driver/remote.c and util/vroot.h */
+static int xsublim_Ss_Handler(Display* handle_Display,
+ XErrorEvent* handle_Error)
+{
+ if (handle_Error->error_code == BadWindow)
+ {
+ Xsublim_Ss_Status = BadWindow;
+ return 0;
+ }
+ if (Xsublim_Ss_Handler == NULL)
+ {
+ fprintf(stderr,"%x: ",progname);
+ abort();
+ }
+ return (*Xsublim_Ss_Handler)(handle_Display,handle_Error);
+}
+static Window xsublim_Ss_GetWindow(Display* ss_Display)
+{
+ Window win_Root;
+ Window win_RootReturn;
+ Window win_Parent;
+ Window* win_Child;
+ Window win_Win;
+ int child_Count;
+ int child_Index;
+ Atom prop_Type;
+ int prop_Format;
+ unsigned long prop_Count;
+ unsigned long prop_Bytes;
+ char* prop_Value;
+ int prop_Status;
+ static Atom XA_SCREENSAVER_VERSION = -1;
+ static Atom __SWM_VROOT;
+
+ /* Assume bad things */
+ win_Win = 0;
+ win_Child = NULL;
+
+ /* Find the atoms */
+ if (XA_SCREENSAVER_VERSION == -1)
+ {
+ XA_SCREENSAVER_VERSION = XInternAtom(ss_Display,
+ "_SCREENSAVER_VERSION",FALSE);
+ __SWM_VROOT = XInternAtom(ss_Display,"__SWM_VROOT",FALSE);
+ }
+
+ /* Find a screensaver window */
+ win_Root = RootWindowOfScreen(DefaultScreenOfDisplay(ss_Display));
+ if (XQueryTree(ss_Display,win_Root,&win_RootReturn,&win_Parent,
+ &win_Child,&child_Count) != FALSE)
+ {
+ if (
+ (win_Root == win_RootReturn) &&
+ (win_Parent == 0) &&
+ (win_Child != NULL) &&
+ (child_Count > 0))
+ {
+ for (child_Index = 0;child_Index < child_Count;
+ child_Index++)
+ {
+ XSync(ss_Display,FALSE);
+ Xsublim_Ss_Status = 0;
+ Xsublim_Ss_Handler =
+ XSetErrorHandler(xsublim_Ss_Handler);
+ prop_Value = NULL;
+ prop_Status = XGetWindowProperty(ss_Display,
+ win_Child[child_Index],XA_SCREENSAVER_VERSION,
+ 0,200,FALSE,XA_STRING,&prop_Type,&prop_Format,
+ &prop_Count,&prop_Bytes,
+ (unsigned char**)&prop_Value);
+ XSync(ss_Display,FALSE);
+ XSetErrorHandler(Xsublim_Ss_Handler);
+ if (prop_Value != NULL)
+ {
+ XFree(prop_Value);
+ }
+ if (Xsublim_Ss_Status == BadWindow)
+ {
+ prop_Status = BadWindow;
+ }
+ if ((prop_Status == Success) &&
+ (prop_Type != None))
+ {
+ /* See if it's a virtual root */
+ prop_Value = NULL;
+ prop_Status =
+ XGetWindowProperty(ss_Display,
+ win_Child[child_Index],__SWM_VROOT,0,
+ 1,FALSE,XA_WINDOW,&prop_Type,
+ &prop_Format,&prop_Count,&prop_Bytes,
+ (unsigned char**)&prop_Value);
+ if (prop_Value != NULL)
+ {
+ XFree(prop_Value);
+ }
+ if ((prop_Status == Success) &&
+ (prop_Type != None))
+ {
+ win_Win =
+ win_Child[child_Index];
+ }
+ }
+ }
+ }
+ }
+ if (win_Child != NULL)
+ {
+ XFree(win_Child);
+ }
+ return win_Win;
+}
+
+/* Main ==================================================================== */
+static XErrorHandler Xsublim_Sh_Handler = NULL;
+static int Xsublim_Sh_Status = 0;
+
+static int xsublim_Sh_Handler(Display* handle_Display,
+ XErrorEvent* handle_Error)
+{
+ if (handle_Error->error_code == BadMatch)
+ {
+ Xsublim_Sh_Status = BadMatch;
+ return 0;
+ }
+ if (Xsublim_Sh_Handler == NULL)
+ {
+ fprintf(stderr,"%s: ",progname);
+ abort();
+ }
+ return (*Xsublim_Sh_Handler)(handle_Display,handle_Error);
+}
+int main(int argc,char* argv[])
+{
+ int sig_Number;
+ int sig_Signal[] =
+ {
+ SIGHUP,
+ SIGINT,
+ SIGQUIT,
+ SIGILL,
+ SIGTRAP,
+ SIGIOT,
+ SIGABRT,
+#if defined(SIGEMT)
+ SIGEMT,
+#endif
+ SIGFPE,
+ SIGBUS,
+ SIGSEGV,
+#if defined(SIGSYS)
+ SIGSYS,
+#endif
+ SIGTERM,
+#if defined(SIGXCPU)
+ SIGXCPU,
+#endif
+#if defined(SIGXFSZ)
+ SIGXFSZ,
+#endif
+#if defined(SIGDANGER)
+ SIGDANGER,
+#endif
+ -1
+ };
+ Widget app_App;
+ Display* disp_Display;
+ Window win_Root;
+ XWindowAttributes attr_Win;
+ XGCValues gc_ValFore;
+ XGCValues gc_ValBack;
+ GC gc_GcFore;
+ GC gc_GcBack;
+ XFontStruct* font_Font;
+ char* font_List[] =
+ {
+ "-*-character-*-r-*-*-*-600-*-*-p-*-*-*",
+ "-*-helvetica-*-r-*-*-*-600-*-*-p-*-*-*",
+ "-*-lucida-*-r-*-*-*-600-*-*-p-*-*-*",
+ "-*-times-*-r-*-*-*-600-*-*-p-*-*-*",
+ "-*-*-*-r-*-sans-*-600-*-*-p-*-*-*",
+ "-*-*-*-r-*-*-*-600-*-*-m-*-*-*",
+
+ "-*-helvetica-*-r-*-*-*-240-*-*-p-*-*-*",
+ "-*-lucida-*-r-*-*-*-240-*-*-p-*-*-*",
+ "-*-times-*-r-*-*-*-240-*-*-p-*-*-*",
+ "-*-*-*-r-*-sans-*-240-*-*-p-*-*-*",
+ "-*-*-*-r-*-*-*-240-*-*-m-*-*-*",
+ "fixed",
+ NULL
+ };
+ int font_Index;
+ int text_Length;
+ int text_X;
+ int text_Y;
+ int text_Width;
+ int text_Height;
+ char* text_List[XSUBLIM_TEXT_COUNT];
+ int text_Used[XSUBLIM_TEXT_COUNT];
+ char text_Text[XSUBLIM_TEXT_LENGTH+1];
+ char* text_Phrase;
+ char* text_Word;
+ int text_Index;
+ int text_Item;
+ int text_Count;
+ struct
+ {
+ int outline_X;
+ int outline_Y;
+ } text_Outline[] =
+ {
+ { -1,-1 },
+ { 1,-1 },
+ { -1, 1 },
+ { 1, 1 },
+ { 0, 0 }
+ };
+ int text_OutlineIndex;
+ XImage* image_Image = NULL;
+ int image_X = 0;
+ int image_Y = 0;
+ int image_Width = 0;
+ int image_Height = 0;
+ int arg_Count;
+ int arg_FlagCenter;
+ int arg_FlagOutline;
+ int arg_FlagScreensaver;
+ int arg_FlagRandom;
+ int arg_DelayShow;
+ int arg_DelayWord;
+ int arg_DelayPhraseMin;
+ int arg_DelayPhraseMax;
+ char* arg_Text;
+
+ /* Set-up ---------------------------------------------------------- */
+
+ /* Catch signals */
+ Xsublim_Sig_Last = -1;
+ for (sig_Number = 0;sig_Signal[sig_Number] != -1;sig_Number++)
+ {
+ signal(sig_Number,xsublim_Sig_Catch);
+ }
+
+ /* Randomize */
+ srandom((int)time((time_t*)0));
+
+ /* Handle all the X nonsense */
+#if defined(__sgi)
+ SgiUseSchemes("none");
+#endif
+ for (arg_Count = 0;options[arg_Count].option != NULL;arg_Count++)
+ {
+ ;
+ }
+ app_App = XtAppInitialize(&app,progclass,options,arg_Count,&argc,argv,
+ defaults,0,0);
+
+ /* jwz */
+ if (argc > 1)
+ {
+ int x = 18;
+ int end = 78;
+ int i;
+ int count = (sizeof(options)/sizeof(*options))-1;
+ fprintf(stderr, "Unrecognised option: %s\n", argv[1]);
+ fprintf (stderr, "Options include: ");
+ for (i = 0; i < count; i++)
+ {
+ char *sw = options [i].option;
+ Bool argp = (options [i].argKind == XrmoptionSepArg);
+ int size = strlen (sw) + (argp ? 6 : 0) + 2;
+ if (x + size >= end)
+ {
+ fprintf (stderr, "\n\t\t ");
+ x = 18;
+ }
+ x += size;
+ fprintf (stderr, "%s", sw);
+ if (argp) fprintf (stderr, " <arg>");
+ if (i != count-1) fprintf (stderr, ", ");
+ }
+ fprintf (stderr, ".\n");
+ exit (-1);
+ }
+
+ disp_Display = XtDisplay(app_App);
+ db = XtDatabase(disp_Display);
+ XtGetApplicationNameAndClass(disp_Display,&progname,&progclass);
+ win_Root = RootWindowOfScreen(XtScreen(app_App));
+ XtDestroyWidget(app_App);
+
+ /* Get the arguments */
+ arg_FlagCenter = get_boolean_resource(XSUBLIM_ARG_CENTER,"Boolean");
+ arg_FlagOutline = get_boolean_resource(XSUBLIM_ARG_OUTLINE,"Boolean");
+ arg_FlagScreensaver = get_boolean_resource(XSUBLIM_ARG_SCREENSAVER,
+ "Boolean");
+ arg_FlagRandom = get_boolean_resource(XSUBLIM_ARG_RANDOM,"Boolean");
+ arg_DelayShow = get_integer_resource(XSUBLIM_ARG_DELAYSHOW,"Integer");
+ arg_DelayWord = get_integer_resource(XSUBLIM_ARG_DELAYWORD,"Integer");
+ arg_DelayPhraseMin = get_integer_resource(XSUBLIM_ARG_DELAYPHRASEMIN,
+ "Integer");
+ arg_DelayPhraseMax = get_integer_resource(XSUBLIM_ARG_DELAYPHRASEMAX,
+ "Integer");
+ if (arg_DelayPhraseMax < arg_DelayPhraseMin)
+ {
+ arg_DelayPhraseMax = arg_DelayPhraseMin;
+ }
+
+ /* Get the phrases */
+ text_Index = 0;
+ text_Item = 0;
+ text_Count = 0;
+ memset(text_Used,0,sizeof(text_Used));
+ arg_Text = get_string_resource(XSUBLIM_ARG_PHRASES,"Phrases");
+ if (arg_Text != NULL)
+ {
+ arg_Text = strdup(arg_Text);
+ while (((text_Phrase = strtok(arg_Text,"\n")) != NULL) &&
+ (text_Count < XSUBLIM_TEXT_COUNT))
+ {
+ arg_Text = NULL;
+ text_List[text_Count] = text_Phrase;
+ text_Count++;
+ }
+ }
+ text_List[text_Count] = NULL;
+ if (text_Count == 0)
+ {
+ fprintf(stderr,"%s: No text to display\n",progname);
+ exit(-1);
+ }
+
+ /* Load the font */
+ font_Font = XLoadQueryFont(disp_Display,
+ get_string_resource(XSUBLIM_ARG_FONT,"Font"));
+ font_Index = 0;
+ while ((font_Font == NULL) && (font_List[font_Index] != NULL))
+ {
+ font_Font = XLoadQueryFont(disp_Display,font_List[font_Index]);
+ font_Index++;
+ }
+ if (font_Font == NULL)
+ {
+ fprintf(stderr,"%s: Couldn't load a font\n",progname);
+ exit(-1);
+ }
+
+ /* Create the GCs */
+ XGetWindowAttributes(disp_Display,win_Root,&attr_Win);
+ gc_ValFore.font = font_Font->fid;
+ gc_ValFore.foreground = get_pixel_resource("foreground","Foreground",
+ disp_Display,attr_Win.colormap);
+ gc_ValFore.background = get_pixel_resource("background","Background",
+ disp_Display,attr_Win.colormap);
+ gc_ValFore.subwindow_mode = IncludeInferiors;
+ gc_GcFore = XCreateGC(disp_Display,win_Root,
+ (GCFont|GCForeground|GCBackground|GCSubwindowMode),&gc_ValFore);
+ gc_ValBack.font = font_Font->fid;
+ gc_ValBack.foreground = get_pixel_resource("background","Background",
+ disp_Display,attr_Win.colormap);
+ gc_ValBack.background = get_pixel_resource("foreground","Foreground",
+ disp_Display,attr_Win.colormap);
+ gc_ValBack.subwindow_mode = IncludeInferiors;
+ gc_GcBack = XCreateGC(disp_Display,win_Root,
+ (GCFont|GCForeground|GCBackground|GCSubwindowMode),&gc_ValBack);
+
+ /* Loop ------------------------------------------------------------ */
+ while (Xsublim_Sig_Last == -1)
+ {
+ /* Once-per-phrase stuff ----------------------------------- */
+
+ /* If we're waiting for a screensaver... */
+ if (arg_FlagScreensaver != FALSE)
+ {
+ /* Find the screensaver's window */
+ win_Root = xsublim_Ss_GetWindow(disp_Display);
+ if (win_Root == 0)
+ {
+ usleep(30000000);
+ continue;
+ }
+ }
+
+ /* Pick the next phrase */
+ if (arg_FlagRandom != FALSE)
+ {
+ text_Item = random()%text_Count;
+ text_Index = 0;
+ }
+ while (text_Used[text_Item] != FALSE)
+ {
+ text_Index++;
+ text_Item++;
+ if (text_Index == text_Count)
+ {
+ text_Index = 0;
+ memset(text_Used,0,sizeof(text_Used));
+ }
+ if (text_List[text_Item] == NULL)
+ {
+ text_Item = 0;
+ }
+ }
+ text_Used[text_Item] = TRUE;
+ strncpy(text_Text,text_List[text_Item],
+ XSUBLIM_TEXT_LENGTH);
+ text_Phrase = text_Text;
+
+ /* Run through the phrase */
+ while (((text_Word = strtok(text_Phrase," \t")) != NULL) &&
+ (Xsublim_Sig_Last == -1))
+ {
+ text_Phrase = NULL;
+
+ /* Once-per-word stuff ----------------------------- */
+
+ /* Find the text's position */
+ XGetWindowAttributes(disp_Display,win_Root,&attr_Win);
+ text_Length = strlen(text_Word);
+ text_Width = XTextWidth(font_Font,text_Word,
+ text_Length)+XSUBLIM_TEXT_OUTLINE*2;
+ text_Height = font_Font->ascent+font_Font->descent+1+
+ XSUBLIM_TEXT_OUTLINE*2;
+ if (arg_FlagCenter == FALSE)
+ {
+ text_X = random()%(attr_Win.width-text_Width);
+ text_Y = random()%(attr_Win.height-
+ text_Height);
+ }
+ else
+ {
+ text_X = (attr_Win.width/2)-(text_Width/2);
+ text_Y = (attr_Win.height/2)-(text_Height/2);
+ }
+
+ /* Find the image's position (and pad it out slightly,
+ otherwise bits of letter get left behind -- are
+ there boundry issues I don't know about?) */
+ image_X = text_X-16;
+ image_Y = text_Y;
+ image_Width = text_Width+32;
+ image_Height = text_Height;
+ if (image_X < 0)
+ {
+ image_X = 0;
+ }
+ if (image_Y < 0)
+ {
+ image_Y = 0;
+ }
+ if (image_X+image_Width > attr_Win.width)
+ {
+ image_Width = attr_Win.width-image_X;
+ }
+ if (image_Y+image_Height > attr_Win.height)
+ {
+ image_Height = attr_Win.height-image_Y;
+ }
+
+ /* Influence people for our own ends --------------- */
+
+ /* Grab the server -- we can't let anybody draw over
+ us */
+ XSync(disp_Display,FALSE);
+ XGrabServer(disp_Display);
+ XSync(disp_Display,FALSE);
+
+ /* Set up an error handler that ignores BadMatches --
+ since the screensaver can take its window away at
+ any time, any call that uses it might choke */
+ Xsublim_Sh_Status = 0;
+ Xsublim_Sh_Handler =
+ XSetErrorHandler(xsublim_Sh_Handler);
+
+ /* Save the current background */
+ image_Image = XGetImage(disp_Display,win_Root,image_X,
+ image_Y,image_Width,image_Height,~0L,ZPixmap);
+
+ /* If we've successfully saved the background... */
+ if (image_Image != NULL)
+ {
+ if (Xsublim_Sh_Status == 0)
+ {
+ /* Draw the outline */
+ if (arg_FlagOutline != FALSE)
+ {
+ for (text_OutlineIndex = 0;
+ text_Outline[
+ text_OutlineIndex].outline_X
+ != 0;text_OutlineIndex++)
+ {
+ /* Y'know, eight
+ character tabs and
+ descriptive variable
+ names become
+ annoying at some
+ point... */
+ XDrawString(
+ disp_Display,
+ win_Root,gc_GcBack,
+ text_X+text_Outline[
+ text_OutlineIndex].
+ outline_X*
+ XSUBLIM_TEXT_OUTLINE,
+ text_Y+
+ (font_Font->ascent)+
+ text_Outline[
+ text_OutlineIndex].
+ outline_Y*
+ XSUBLIM_TEXT_OUTLINE,
+ text_Word,
+ text_Length);
+ }
+ }
+
+ /* Draw the word */
+ XDrawString(disp_Display,win_Root,
+ gc_GcFore,text_X,
+ text_Y+(font_Font->ascent),text_Word,
+ text_Length);
+ }
+ if (Xsublim_Sh_Status == 0)
+ {
+ /* Wait a bit */
+ XSync(disp_Display,FALSE);
+ if (Xsublim_Sig_Last == -1)
+ {
+ usleep(arg_DelayShow);
+ }
+
+ /* Restore the background */
+ XPutImage(disp_Display,win_Root,
+ gc_GcFore,image_Image,0,0,image_X,
+ image_Y,image_Width,image_Height);
+ }
+
+ /* Free the image (and it's goddamned structure
+ -- the man page for XCreateImage() lies,
+ lies, lies!) */
+ XDestroyImage(image_Image);
+ XFree(image_Image);
+ }
+
+ /* Restore the error handler, ungrab the server */
+ XSync(disp_Display, FALSE);
+ XSetErrorHandler(Xsublim_Sh_Handler);
+ XUngrabServer(disp_Display);
+ XSync(disp_Display, FALSE);
+
+ /* Pause between words */
+ if (Xsublim_Sig_Last == -1)
+ {
+ usleep(arg_DelayWord);
+ }
+ }
+
+ /* Pause between phrases */
+ if (Xsublim_Sig_Last == -1)
+ {
+ usleep(random()%(arg_DelayPhraseMax-
+ arg_DelayPhraseMin+1)+arg_DelayPhraseMin);
+ }
+ }
+
+ /* Exit ------------------------------------------------------------ */
+ for (sig_Number = 0;sig_Signal[sig_Number] != -1;sig_Number++)
+ {
+ signal(sig_Number,SIG_DFL);
+ }
+ kill(getpid(),Xsublim_Sig_Last);
+
+ return 0;
+}
projects / xscreensaver / commitdiff