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NAME
     xglinfo - display & visual information  utility  for  OpenGL
     with the X Window System

SYNOPSIS
     xglinfo    [-display    displayname]    [+-printDisplayInfo]
     [+-printScreenInfo]    [+-printVisualInfo]   [+-printCooked-
     VisualInfo] [+-printRawVisualInfo]


DESCRIPTION
     Xglinfo is a utility for displaying information about  an  X
     server  supporting  the  OpenGL  extension,  especially with
     regards to visuals.  It is used to examine the  capabilities
     of  a  server,  the predefined values for various parameters
     used in communicating between clients and  the  server,  and
     the  different  types of screens and visuals that are avail-
     able. It includes the same set of information  as  xdpyinfo,
     but  is extended to display information about OpenGL visuals
     as well. In contrast to xdpyinfo  the  amount  and  form  of
     information  displayed is controllable by command line argu-
     ments.

     The amount of information displayed is controllable  by  the
     command  line switches. Many of these switches take either a
     '+' or a '-'. If the argument  is  preceded  by  a  '+'  the
     option  is  turned  on. If the argument is preceded by a '-'
     the option is turned off.

     The visual information can be printed  in  either  'raw'  or
     'cooked' form. The cooked form is the default. In the cooked
     form the visual information is analyzed and is presented  in
     user friendly form. At the same time some basic error checks
     are performed on the combinations of visual  data.  The  raw
     form just dumps the values returned for the visual.

     Credit is due to Jim Fulton who wrote the original  xdpyinfo
     while at MIT from which xglinfo is derived.

EXAMPLE
     The following shows a sample produced by xglinfo  when  con-
     nected to display that supports an 24 plane screen. Note the
     error reporting for the  OpenGL  visuals.  The  inconsistent
     OpenGL  visuals  were  deliberately set up to illustrate the
     error checking feature.

================================= Display :0.0 =================================
name of display:        :0.0
version number:         11.0
vendor string:          DECWINDOWS Digital Equipment Corporation DEC OSF/1 V1.2
vendor release:         1
max request size:       262140 bytes
motion buffer size:     100
bitmap:                 unit = 32, bit order = LSBFirst, padding = 32
image byte order:       LSBFirst
keycode range:          minimum 86, maximum 255
focus:                  PointerRoot
default screen num:     0
number of screens:      1
pixmap formats:         4 total
                        depth  1, bits_per_pixel  1, scanline_pad 32
                        depth  8, bits_per_pixel  8, scanline_pad 32
                        depth 12, bits_per_pixel 16, scanline_pad 32
                        depth 24, bits_per_pixel 32, scanline_pad 32
Server Extensions:      14 total
                        X3D-PEX, GLX, DEC-GLX, SHAPE, MIT-SHM,
                        Multi-Buffering, MIT-SUNDRY-NONSTANDARD,
                        Keyboard-Management-Extension,
                        Shared-Memory Transport, DEC-XTRAP, XVideo, Xie,
                        Adobe-DPS-Extension, DPSExtension,
GLX Extension:          error base = 142, event base = 64, Version 1.0
=================================== Screen 0 ===================================
screen:                 0
dimensions:             1280x1024 pixels (342x273 millimeters)
resolution:             95x95 dots per inch
depths:                 (3 total):       1, 8, 24
root window id:         0x2a
depth of root window:   24 planes
number colormaps:       minimum 1, maximum 1
default colormap:       0x28, number colormap cells 256
preallocated pixels:    black 0x0, white 0xffffff
options:                backing-store YES, save-unders YES
input event mask:       0x70003c
                        ButtonPress          ButtonRelease        EnterWindow
                        LeaveWindow          SubstructureRedirect FocusChange
                        PropertyChange
=================== 7 Visuals for Screen 0 (default = 0x26) ===================
StaticGray visual: ID = 0x21 (hex) 33 (decimal) screen = 0
  GL NOT SUPPORTED
  Core X: depth=8, colormapSize=256

GrayScale visual: ID = 0x22 (hex) 34 (decimal) screen = 0
  GL NOT SUPPORTED
  Core X: depth=8, colormapSize=256

StaticColor visual: ID = 0x23 (hex) 35 (decimal) screen = 0
  DOUBLE buffered MONO COLOR INDEX visual with (Z Stencil)
  GL Sizes: ColorIndex=8, Z=24, Stencil=8
  ERROR: CI visual, but Alpha has non-zero size = 8
  Core X: depth=8, colormapSize=256

PseudoColor visual: ID = 0x24 (hex) 36 (decimal) screen = 0
  DOUBLE buffered MONO COLOR INDEX visual with (Z Stencil)
  GL Sizes: ColorIndex=8, Z=24, Stencil=8
  ERROR: CI visual, but Alpha has non-zero size = 8
  Core X: depth=8, colormapSize=256

TrueColor visual: ID = 0x25 (hex) 37 (decimal) screen = 0
  DOUBLE buffered MONO RGB visual with (Alpha Z Stencil Accum)
  GL Sizes: RGBA=(3,3,2,8), Z=24, Stencil=8, Accum=(16,16,16,16)
  Core X: depth=8, colormapSize=8 RGB: masks=(0xe0,0x1c,0x3) bits=8

TrueColor visual: ID = 0x26 (hex) 38 (decimal) screen = 0
  DOUBLE buffered MONO RGB visual with (Alpha Z Stencil Accum)
  GL Sizes: RGBA=(8,8,8,8), Z=24, Stencil=8, Accum=(16,16,16,16)
  Core X: depth=24, colormapSize=256 RGB: masks=(0xff0000,0xff00,0xff) bits=8

DirectColor visual: ID = 0x27 (hex) 39 (decimal) screen = 0
  DOUBLE buffered MONO RGB visual with (Alpha Z Stencil Accum)
  GL Sizes: RGBA=(8,8,8,8), Z=24, Stencil=8, Accum=(16,16,16,16)
  Core X: depth=24, colormapSize=256 RGB: masks=(0xff0000,0xff00,0xff) bits=8



ENVIRONMENT
     DISPLAY To get the default host, display number, and screen.

SEE ALSO
     X(1), xdpyinfo(1), xwininfo(1), xprop(1), xrdb(1)

COPYRIGHT
     Copyright 1993, Digital Equipment Corporation

AUTHOR
     John Dennis
     Digital Equipment Corporation
     jdennis@mlo.dec.com

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