9V(9.1) 																   9V(9.1)

NAME

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

SYNOPSIS

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

       fb/save

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

DESCRIPTION

       9v  displays its argument picture file (default standard input) in a new window in the middle 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 event.

       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 dis-
       plays 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.

SOURCE

       /sys/src/fb/9v.c
       /sys/src/fb/save.c
       /sys/src/fb/flip.c

BUGS

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

SEE ALSO

       picfile(9.6)

																	   9V(9.1)