Signature
Parameters
| Variables | Description |
|---|---|
| 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);