plan9 man page for btrace

BTRACE(8)						      System Manager's Manual							 BTRACE(8)

NAME
       btrace - trace bitblt protocol

SYNOPSIS
       btrace [ -d [ d ]] [ -o ofile ] [ -b bfile ]

DESCRIPTION
       Btrace  eavesdrops  on  messages to and from /dev/bitblt, interprets them as messages in the bit device protocol (see bit(3)), and prints a
       readable version of the messages on a trace file, btrace.out by default.  After btrace is started, it runs in the background,  tracing  all
       subsequent graphics programs run in that window.  Options for btrace are:

       -o ofile  Print trace output in ofile instead of btrace.out.

       -b bfile  Dump  each  bitmap  read or written to bfile, using the format of bitmap(6).  Each succeeding bitmap overwrites the previous con-
		 tents of file.  Tweak(1) or showimage(7) can be used to examine the file.

       -d	 Increase the level of trace detail.  The maximum level is -dd.

FILES
       /dev/bitblt

SOURCE
       /sys/src/cmd/btrace.c

SEE ALSO
       bit(3), bitmap(6), graphics(2), tweak(1), showimage(7)

																	 BTRACE(8)