ftp://ftp.sunet.se/pub/vendor/sco/skunkware/osr5/x11/savers/xscreensaver/xscreensaver...

[xscreensaver] / local / man / man.1 / blitspin.1

diff --git a/local/man/man.1/blitspin.1 b/local/man/man.1/blitspin.1
index d7e87d30bd66c2fdba81e9db74b9eba8ad1669fa..f374666ee8b876a48fb79f1c9429d86ace79218e 100644 (file)
--- a/local/man/man.1/blitspin.1
+++ b/local/man/man.1/blitspin.1
@@ -1,4 +1,4 @@
-.TH XScreenSaver 1 "16-May-97" "X Version 11"
+.TH XScreenSaver 1 "24-Nov-97" "X Version 11"
 .SH NAME
 blitspin - rotate a bitmap in an interesting way
 .SH SYNOPSIS
@@ -46,19 +46,44 @@ name is not a fully-qualified pathname.
 .TP 8
 .B \-grab\-screen
 If this option is specified, then the image which is spun will be grabbed
-from the portion of the screen underlying the blitspin window.
+from the portion of the screen underlying the blitspin window.  (Or, it
+may come from an external video source: see below.)
 .PP
 .TP 8
-.B \-delay microseconds
+.B \-delay \fImicroseconds\fP
 How long to delay between steps of the rotation process, in microseconds.
 Default is 500000, one-half second.
 .PP
 .TP 8
-.B \-delay2 microseconds
+.B \-delay2 \fImicroseconds\fP
 How long to delay between each 90-degree rotation, in microseconds.
 Default is 500000, one-half second.
 .B DISPLAY
 to get the default host and display number.
+.SH RESOURCES
+On some systems (currently, only SGIs), this program can, instead of grabbing
+a desktop image, grab a frame of video from an external camera and manipulate
+that instead.  The following resources control that.
+.PP
+.TP 8
+.B grabVideoProbability \fR(Float)\fP
+What portion of the time to grab video rather than a screen image, 
+between 0.0 and 1.0.  Defaults to 0.5, or half the time.
+.TP 8
+.B videoDevice \fR(Integer)\fP
+The number of the default video input device to check first.  If unspecified, 
+the default camera (from videopanel(1)) will be checked first.  After that, all
+other available video input devices will be checked in order.  
+
+The first one which produces a non-black image will be used.  If all images
+are black, the others will be re-checked a few times before giving up and
+falling back to simply grabbing a desktop image (but note that this takes a
+few seconds, so if you don't actually have any video sources hooked up, you
+should consider turning off video grabbing by setting
+\fBgrabVideoProbability\fP to 0.0.)
+.TP 8
+.B videoGain \fR(Float)\fP
+The amount by which to brighten the grabbed image.  This defaults to 2.2.
 .SH ENVIRONMENT
 .B XENVIRONMENT
 to get the name of a resource file that overrides the global resources
@@ -75,7 +100,7 @@ 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.
 .SH AUTHOR
-Jamie Zawinski <jwz@netscape.com>, 17-aug-92.
+Jamie Zawinski <jwz@jwz.org>, 17-aug-92.
 
 Based on SmallTalk code which appeared in the August 1981 issue of Byte
 magazine.