path: root/hacks/config/blitspin.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="blitspin" _label="BlitSpin">

  <command arg="-root"/>

  <video href="https://www.youtube.com/watch?v=UTtcwb-UWW8"/>

  <hgroup>
   <vgroup>
    <number id="delay" type="slider" arg="-delay %"
            _label="Fuzzy rotation speed" _low-label="Slow" _high-label="Fast"
            low="1" high="800000" default="500000"
            convert="invert"/>

    <number id="delay2" type="slider" arg="-delay2 %"
            _label="90 degree rotation speed" _low-label="Slow" _high-label="Fast"
            low="1" high="800000" default="500000"
            convert="invert"/>

    <number id="duration" type="slider" arg="-duration %"
            _label="Duration" _low-label="10 seconds" _high-label="10 minutes"
            low="10" high="600" default="120"/>
   </vgroup>

   <vgroup>
    <!--  <file id="bitmap" _label="Bitmap to rotate" arg="-bitmap %"/> -->
    <xscreensaver-image />
    <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
   </vgroup>
  </hgroup>

  <xscreensaver-updater />

  <_description>

Repeatedly rotates a bitmap by 90 degrees by using logical operations:
the bitmap is divided into quadrants, and the quadrants are shifted
clockwise.  Then the same thing is done again with progressively
smaller quadrants, except that all sub-quadrants of a given size are
rotated in parallel.  As you watch it, the image appears to dissolve
into static and then reconstitute itself, but rotated.

Written by Jamie Zawinski; 1992.
  </_description>
</screensaver>