glutInitDisplayMode(3GLUT)

NAME
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_SINGLE 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 request a window with an accumulation buffer.

GLUT_ALPHA
    Bit mask to request a window with an alpha component to the color buffer(s).

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

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

GLUT_MULTISAMPLE
    Bit mask to request 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.

GLUT_STEREO
    Bit mask to select a stereo window.

GLUT_LUMINANCE
    Bit mask to select a window with a ``luminance'' color model. This model provides the functionality 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 glutGet(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 linear 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. Note that some bits "request" a capability and other bits "select" a capability. A requestable capability may be assigned to the created window even if the bit for the capability was not set. For example, GLUT may create a window with a depth buffer even though GLUT_DEPTH is not specified. 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)