SNOOP(6D) SNOOP(6D)
snoop - magnify and report on the screen under the mouse pointer
snoop
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. Specifically,
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 It has been replaced by oglsnoop which is available on your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 [Toc] [Back]
decides if snoop will read from the front or back buffers. Only has
meaning if the hardware supports RGB mode.
MIDDLE MOUSEBUTTON [Toc] [Back]
controls how snoop interprets the data it finds-- either RGB or
colorindex. Available only if the hardware supports RGB mode.
RIGHT MOUSEBUTTON [Toc] [Back]
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 support
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).
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SNOOP(6D) SNOOP(6D)
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 available
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.
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