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Plan 9 - man page for 9v (plan9 section 9)

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9V(9.1) 										  9V(9.1)

       9v, save, flip - copy picture files to and from screen

       fb/9v [ -mMq ] [ -w x0 y0 x1 y1 ] [ -c cenx ceny ] [ input ]


       fb/flip [ -r fps ] [ -p ] p1 p2 ...

       9v displays its argument picture file (default standard input) in a new window in the mid-
       dle of an 81/2 screen.  In addition to the native picfile(9.6) format, it  tries  to  read
       images  of  many  foreign encodings.  (It guesses which encoding based on the file's name,
       recognizing suffixes .gif, .jpg, .jpeg, .ega, .face, .pcx, .sgi, .tga, .tif, .tiff,  .rle,
       and .xbm.  For a program that guesses based on the file's contents, see cvt2pic(9.1).)  On
       an 8-bit display, it loads an 8-bit image's color map if it contains one.   Otherwise  (if
       the  display  is  fewer	than 8 bits per pixel, or the image is not 8-bit color-mapped) it
       computes the image's luminance, dithered appropriately for the available grey shades.

       In the 9v window button 1 displays pixel coordinates and values at the top of  the  window
       and  button  3 pops up a menu.  The fix cmap menu item reloads the color map, in the event
       that some other program has stepped on it.  The exit button exits after confirmation.

       The -c flag specifies the window's center coordinates, overriding  the  default.   The  -w
       flag  specifies	the window's minimum and maximum x and y coordinates.  Flag -m suppresses
       default loading the color map of images containing one.	-M causes 9v to load  an  image's
       color  map  and	exit  immediately.   -q  makes 9v exit on receiving any mouse or keyboard

       Save writes a picture file containing its window (or screen if 81/2 is not  running)  onto
       its standard output.

       Flip  displays  many  picture  files in sequence in a loop.  The pictures must be the same
       size, and must fit in memory.  The pictures are all loaded into main memory and then  sent
       to the display as required using wrbitmap (see balloc(2)), so the machine running flip can
       be remote; a CPU server can be used if there are many large frames.  The  -r  option  sets
       the  display rate in frames per second.	By default flip displays as fast as it can: about
       15 frames per second for a small picture on a Magnum.  The -p  flag  causes  a  one-second
       pause at the end of the loop.


       9v guesses the format of foreign images by looking at the filename, not its contents.


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