glColorMask — enable and disable writing of color buffer components
void fsfuncglColorMask( | GLboolean red, |
| GLboolean green, | |
| GLboolean blue, | |
GLboolean alpha); |
red,
green,
blue,
alpha
Specify whether red, green, blue, and alpha can or
cannot be written into the color buffer. The initial
values are all GL_TRUE,
indicating that all color components can be written.
glColorMask
specifies whether the individual components in the color
buffer can or cannot be written. If red is
GL_FALSE,
for example, no change is made to the red component of any
pixel in the color buffer, regardless of the drawing operation
attempted, including
glClear.
Changes to individual bits of components cannot be controlled. Rather, changes are either enabled or disabled for entire color components.
Copyright © 2003-2004 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.