================================================    Updated:
		Environment variables affecting LibGGI behaviour    990514
		================================================    


DISPLAY		- If set, assumes you want to use the X target. Can be
		  overridden by the GGI_DISPLAY variable.

GGI_DISPLAY	- Target to use when ggiOpen() is called with a NULL argument.

		  Format: <target>[:<targetargs>]

		  A list of targets with descriptions can be found in the
		  targets.txt file.
		  If neither this or DISPLAY is set targets are tried in the
		  following order: fbdev, svga, aa

GGI_INPUT_<targetname>
		- Specify extra input sources and/or filters for visuals
		  using <targetname>.

		  Format: <input>[:<inputargs>]
		  
		  Multiple inputs can be specified using the notation:
		  (<i1>):(<i2>):(<i3>) etc...

GGI_INPUT	- Specify extra input sources and/or filters for all other
		  visuals.
		  Same format as above.

GGI_DEFMODE	- The default mode for LibGGI to use. When GGI_AUTO or GT_AUTO
		  are specified in a mode setting call they will be replaced
		  with values from GGI_DEFMODE before calling the target's
		  setmode function.
		  
		  Format: size virt dpp frames graphtype
		  
		  size = ['S'] X 'x' Y [ 'x' depth ]
		  virt = 'V' X 'x' Y    
		  dpp  = 'D' X 'x' Y  
		  frames = 'F' frames
		  graphtype = '[' scheme depth '/' size ']'  |  scheme depth
		  scheme = 'C' | 'P' | 'K' | 'T'

		  All parameters can be specified in any order. Anything and
		  Everything (!) can be omitted, all ommitted values default
		  to GGI_AUTO (and GT_AUTO for the graphtype). Whitespace and
		  '.' symbols ignored.  Case insensitive.

		  Examples include:
		   640x480	    just a visible size
		   640x480V640x960  same size, but double-height virtual screen
		   V1024x768        only virtual size defined
		   80x40[T]	    (default-bitsized) text mode with 80x40
				      characters
		   Vx100[T]	    text mode with 100 virtual lines
		   640x400[8]	    640x400 at 8 bits per pixel
		   640x400[GT_8BIT] same as above, but palettized
		   320x200x15	    320x200 with 32768 colors
		   320x200[C15]	    320x200 with 32768 colors (hicolor)
		   320x200[C/16]    320x200 with 16 bit pixels (also hicolor)
		   320x200[C24/32]  320x200, 32 bit pixels, 16777216 colors
				      (truecolor)
		   320x200[GT_32BIT] same as above

GGI_DEBUG	- Debug level for LibGGI:
                    0 or unset - debug output is offdebugging is off
		    255        - all debug output is on
		  You may also 'or' any of the following together:
		      2  - debug core
		      4  - debug mode setting
		      8  - debug color handling
		     16  - debug drawing
		     32  - misc debugging output
		     64	 - debug dynamic library handling
		    128  - debug event handling

GGI_DEBUGSYNC	- Turn on synchronous debug output. Flush the output buffers
		  before returning from DPRINT calls.

FRAMEBUFFER	- Specifies which device file the fbdev target should use.

GGI_NEWVT	- Will cause a new VT to be allocated for some Linux-console
		  based targets (currently fbdev and glide).

GGI_MANSYNC_FPS - Specify the framerate for targets using mansync to do
		  SYNC mode. The default is 20fps.
		  If you are experiencing problems with the X target over
		  relatively slow remote connections it might be due to
		  connection overload. You might want to try with a lower
		  GGI_MANSYNC_FPS setting.


GGI_FBDEV_OPTIONS, GGI_FILE_OPTIONS, GGI_GLIDE_MAXFREQ, GGI_GLIDE_MAXHFREQ,
GGI_GLIDE_HALTONSWITCH, GGI_PALEMU_OPTIONS, and GGI_TRUEEMU_OPTIONS are target
specific environment variables. See the file targets.txt for descriptions of
those.