TGVIEW	   version 0.85 BETA
(c) Copyright 1991 John Swenson

TGVIEW is a dithering viewer for TARGA 16,24,32 files. It only works on
ET4000 boards with the Sierra DAC, don't even think about using it with
an XGA or HGS.

New to version 0.85
The dithering is better (fewer artifacts) and it is much faster.
Display modes can be selected from the command line as well as
    autodetected.
If the image is larger than the display mode, it is displayed with the
upper left in the upper left of the screen, the image is correctly
clipped. (future versions will support panning)
The display can be aborted by typing any key.



Usage:

TGVIEW <TARGA file> [-N] [-G[<num>]] [-D<disp_mode>] [-T <TARGA 16 file>]
-N is no dither and -T outputs to a TARGA 16 file rather than the screen.
-G specifies gamma correction. <num> is an optional floating point number
    the specifies the value of the gamma correction. The numbers used are
    the same as the GAMMA number used in PICLAB. -G is the same as -G0.5
-D<disp_mode>	may be one of [3 | 6 | 8] for 320x200, 640x480 or 800x600

The results of this dithering are almost as good as a real live 24 bit
display, but you only need 15 bit hardware. At 640 x 480 the dither is
almost invisible, at 800 x 600 it essentially is invisible.

This version uses Frankie Sierra's "Sierra Lite" filter, it actually works
better in this case than its big brother used in previous versions, and
it is a lot faster.

The gamma correction is very useful for looking at raw color scans.

Future versions will hopefully be faster, include full panning, and include
an on the fly resize from 640 x 480 to 800 x 600.

(I suppose I will get some requests to do this for an XGA as well as the
Sierra, it shouldn't be TOO hard, but since I don't have an XGA, it might
be a little tough)