glutInitDisplayMode - sets the initial display mode.

SYNTAX

       void glutInitDisplayMode(unsigned int mode);

ARGUMENTS

       mode      Display  mode,  normally the bitwise {\m OR}-ing
                 of GLUT display  mode  bit  masks.   See  values
                 below:

       GLUT_RGBA
               Bit  mask  to  select an RGBA mode window. This is
               the default if neither  GLUT_RGBA  nor  GLUT_INDEX
               are specified.

       GLUT_RGB
               An alias for GLUT_RGBA.

       GLUT_INDEX
               Bit mask to select a color index mode window. This
               overrides GLUT_RGBA if it is also specified.

       GLUT_SINGLE
               Bit mask to select a single buffered window.  This
               is the default if neither GLUT_DOUBLE or GLUT_SIN-
               GLE are specified.

       GLUT_DOUBLE
               Bit mask to select a double buffered window.  This
               overrides GLUT_SINGLE if it is also specified.

       GLUT_ACCUM
               Bit  mask  to select a window with an accumulation
               buffer.

       GLUT_ALPHA
               Bit mask to select a window with an  alpha  compo-
               nent to the color buffer(s).

       GLUT_DEPTH
               Bit mask to select a window with a depth buffer.

       GLUT_STENCIL
               Bit mask to select a window with a stencil buffer.

       GLUT_MULTISAMPLE
               Bit mask to select  a  window  with  multisampling
               support. If multisampling is not available, a non-
               multisampling window will automatically be chosen.
               Note:  both the OpenGL client-side and server-side
               implementations must support  the  GLX_SAMPLE_SGIS
               extension for multisampling to be available.
               Bit mask to select a stereo window.

       GLUT_LUMINANCE
               Bit  mask  to select a window with a ``luminance''
               color model.  This model provides the  functional-
               ity  of  OpenGL's  RGBA color model, but the green
               and blue components  are  not  maintained  in  the
               frame  buffer.  Instead each pixel's red component
               is converted to an index between  zero  and  glut-
               Get(GLUT_WINDOW_COLORMAP_SIZE)-1  and looked up in
               a per-window color map to determine the  color  of
               pixels  within the window. The initial colormap of
               GLUT_LUMINANCE windows is initialized to be a lin-
               ear  gray  ramp,  but  can be modified with GLUT's
               colormap routines.

DESCRIPTION

       The initial display mode is used when  creating  top-level
       windows,  subwindows, and overlays to determine the OpenGL
       display mode for the to-be-created window or overlay.

       Note that GLUT_RGBA selects the RGBA color model,  but  it
       does  not  request  any bits of alpha (sometimes called an
       alpha  buffer  or  destination  alpha)  be  allocated.  To
       request  alpha,  specify  GLUT_ALPHA.  The same applies to
       GLUT_LUMINANCE.

       The glutInitDisplayString routine provides a more powerful
       way  to select frame buffer capabilities for GLUT windows.

GLUT_LUMINANCE IMPLEMENTATION NOTES

       GLUT_LUMINANCE is not supported on most OpenGL  platforms.

SEE ALSO

       glutInit, glutCreateWindow, glutInitDisplayString

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)