snoop(6D)

NAME
     snoop - magnify and report on the screen under the mouse pointer

SYNOPSIS
     snoop

DESCRIPTION
     Initially, snoop follows the mouse cursor, magnifying a part of the
     screen under the cursor and reporting pixel values for the point under
     the cursor.  Snoop operates in several modes; these are controlled from
     the keyboard, the mouse, and a pop-up menu.  If the graphics hardware
     does not supports RGB mode, some options will not be available.  Specifi-
     cally, only colorindex mode (Cmode) is available and double buffer mode
     is not used, so reading from the front or back buffers has no meaning.
     Since double buffer mode is not used (so that all color index values may
     be displayed), the black box at the bottom of the screen will flash as
     you move the cursor.  This is normal.

     Note: The demo /usr/demos/General_Demos/snoop will not be available after
     IRIX 6.5.  It has been replaced by oglsnoop which is available on your
     IRIX 6.5 system now.  It can be found in /usr/sbin/oglsnoop.

     LEFT MOUSEBUTTON
          decides if snoop will read from the front or back buffers.  Only has
          meaning if the hardware supports RGB mode.

     MIDDLE MOUSEBUTTON
          controls how snoop interprets the data it finds-- either RGB or
          colorindex.  Available only if the hardware supports RGB mode.

     RIGHT MOUSEBUTTON
          brings up a pop-up menu with several entries, many of which have
          keyboard equivalents:

          Arrow
               Equivalent to pressing the 'A' key on the keyboard, in 'arrow'
               mode the arrow-keys on the keyboard control what part of the
               screen is being snooped, not the position of the mouse pointer.

          Backbuffer
               Equivalent to the 'B' key, will make displaying the back buffer
               the default (pressing the left mousebutton down will display
               the front buffer).  Not available if the hardware does not sup-
               port RGB mode.

          Cmode
               Equivalent to the 'C' key, will make displaying data as
               colorindices the default.  Not available if the hardware does
               not support RGB mode (displaying data as color indicies is not
               deselectable in this case).
          Gouraud
               Equivalent to the 'G' key, will toggle gouraud/flat shading of
               pixels

          Snoop
               mode controls whether or not pixel values are displayed

          12 Bit Component
               Equivalent to the 'D' key, will toggle between component size 8
               (24 bit) and component size 12 (36 bit) RGB pixels.  This mode
               does not enable viewing of the low four bits (wait for OpenGL),
               but will guarantee that the 8 bits read are correct. Not avail-
               able if the hardware does not support RGB mode.  Has no effect
               if the hardware doesn't have 12 bit/component pixels.

          Zoom Equivalent to the '0' through '9' keys, controls the level of
               magnification.

          Stop Will suspend snooping, which can also be accomplished via
               'CTRL-S' (suspend) and 'CTRL-Q' (restart).

          Exit exits snoop, as does the ESC key.