glutgetcolor(3glut) [redhat man page]

glutGetColor(3GLUT)						       GLUT						       glutGetColor(3GLUT)

NAME

       glutGetColor - retrieves a red, green, or blue component for a given color index colormap entry for the layer in use's logical colormap for
       the current window.

SYNTAX

       GLfloat glutGetColor(int cell, int component);

ARGUMENTS

       cell	 Color cell index (starting at zero).

       component One of GLUT_RED, GLUT_GREEN, or GLUT_BLUE.

DESCRIPTION

       glutGetColor retrieves a red, green, or blue component for a given color index colormap entry for the current  window's	logical  colormap.
       The  current  window  should be a color index window. cell should be zero or greater and less than the total number of colormap entries for
       the window. For valid color indices, the value returned is a floating point value between 0.0 and 1.0 inclusive. glutGetColor  will  return
       -1.0  if  the  color  index specified is an overlay's transparent index, less than zero, or greater or equal to the value returned by glut-
       Get(GLUT_WINDOW_COLORMAP_SIZE), that is if the color index is transparent or outside the valid range of color indices.

SEE ALSO

       glutGet, glutSetColor, glutCopyColormap

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)

GLUT
									3.7						       glutGetColor(3GLUT)

glutCopyColormap(3GLUT) 					       GLUT						   glutCopyColormap(3GLUT)

NAME

       glutCopyColormap - copies the logical colormap for the layer in use from a specified window to the current window.

SYNTAX

       void glutCopyColormap(int win);

ARGUMENTS

       win	 The identifier of the window to copy the logical colormap from.

DESCRIPTION

       glutCopyColormap  copies (lazily if possible to promote sharing) the logical colormap from a specified window to the current window's layer
       in use. The copy will be from the normal plane to the normal plane; or from the overlay to the overlay  (never  across  different  layers).
       Once a colormap has been copied, avoid setting cells in the colormap with glutSetColor since that will force an actual copy of the colormap
       if it was previously copied by reference. glutCopyColormap should only be called when both the current window and the win window are  color
       index windows.

EXAMPLE

       Here is an example of how to create two color index GLUT windows with their colormaps loaded identically and so that the windows are likely
       to share the same colormap:

	 int win1, win2;

	 glutInitDisplayMode(GLUT_INDEX);
	 win1 = glutCreateWindow("first color index win");
	 glutSetColor(0, 0.0, 0.0, 0.0);  /* black */
	 glutSetColor(1, 0.5, 0.5, 0.5);  /* gray */
	 glutSetColor(2, 1.0, 1.0, 1.0);  /* black */
	 glutSetColor(3, 1.0, 0.0, 0.0);  /* red */
	 win2 = glutCreateWindow("second color index win");
	 glutCopyColormap(win1);

SEE ALSO

       glutSetColor, glutGetColor, glutCreateWindow

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)

GLUT
									3.7						   glutCopyColormap(3GLUT)