glutInitDisplayMode - sets the initial display mode.
#include <GLUT/glut.h>
void glutInitDisplayMode(unsigned int mode);
- mode
- Display mode, normally the bitwise 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. Note that color index modes are not supported on Mac
OS X.
- 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 select a window with an accumulation buffer.
- GLUT_ALPHA
- Bit mask to select a window with an alpha component 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.
- 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.
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 is not supported on most OpenGL platforms.
glutInit, glutCreateWindow, glutInitDisplayString
Mark J. Kilgard (mjk@nvidia.com)