14 .TH XScreenSaver 1 "17-Jun-99" "X Version 11"
16 webcollage - decorate the screen with random images from the web
19 [\-display \fIhost:display.screen\fP] [\-root] [\-verbose]
20 [\-delay \fIsecs\fP] [\-timeout \fIsecs\fP] [\-background \fIbg\fP]
21 [\-filter \fIcommand\fP] [\-filter2 \fIcommand\fP]
23 The \fIwebcollage\fP program pulls random image off of the World Wide Web
24 and scatters them on the root window. It finds these images by doing
25 random web searches, and extracting images from the returned pages.
26 It places the images on the root window by using the
33 \fIwebcollage\fP also works as a CGI program: simply make a symbolic
34 link to the \fIwebcollage\fP executable called \fInph-webcollage.cgi\fP.
35 If this program sees that it is being run as a CGI, then it will behave
36 appropriately. (The generated web page will list the images one after
37 another, rather than tiling them together.)
39 \fIwebcollage\fP is written in
44 accepts the following options:
47 Draw on the root window. This option is manditory: drawing to a window
48 other than the root window is not yet supported.
50 .B \-verbose \fRor\fP \-v
51 Print diagnostics to stderr. Multiple \fI-v\fP switches increase the
52 amount of output. \fI-v\fP will print out only the URLs of the
53 images; \fI-vv\fP will print all the commands being run; and \fI-vvv\fP
54 will print more than you care about.
56 .B \-delay \fIseconds\fP
57 How long to sleep between images. Default 1 second. (Remember that
58 this program probably spends a lot of time waiting for the network.)
60 .B \-background \fIcolor-or-ppm\fP
61 What to use for the background onto which images are pasted. This may be
62 a color name, a hexadecimal RGB specification in the form '#rrggbb', or
63 the name of a PPM file.
65 .B \-timeout \fIseconds\fP
66 How long to wait for a URL to complete before giving up on it and
67 moving on to the next one.
70 .B \-filter \fIcommand\fP
71 Filter all source images through this command. The command must take
72 a PPM file on stdin, and write a new PPM file to stdout. One good
73 choice for a filter would be:
75 webcollage -root -filter 'vidwhacker -stdin -stdout'
78 .B \-filter2 \fIcommand\fP
79 Filter the \fIcomposite\fP image through this command. The \fI-filter\fP
80 option applies to the sub-images; the \fI-filter2\fP applies to the
81 final, full-screen image.
86 to get the default host and display number.
89 to get the name of a resource file that overrides the global resources
90 stored in the RESOURCE_MANAGER property.
93 .I /usr/dict/words \fRor\fP /usr/share/lib/dict/words
94 To find the random words to feed to search engines.
96 .I http://random.yahoo.com/bin/ryl, http://image.altavista.com/
97 To find random web pages.
99 When drawing on the root window, it always uses the default colormap.
100 This is actually a limitation of xv. But regardless, when using this
101 program with xscreensaver, it must be given the \fBdefault-n\fP
102 visual specification (see the
104 manual for more details.)
106 Only the GIF and JPEG image formats are supported.
108 Transparent and animating GIFs are not supported.
113 .BR xscreensaver (1),
120 Copyright \(co 1998, 1999 by Jamie Zawinski. Permission to use, copy, modify,
121 distribute, and sell this software and its documentation for any purpose is
122 hereby granted without fee, provided that the above copyright notice appear
123 in all copies and that both that copyright notice and this permission notice
124 appear in supporting documentation. No representations are made about the
125 suitability of this software for any purpose. It is provided "as is" without
126 express or implied warranty.
128 Jamie Zawinski <jwz@jwz.org>, 24-May-98.