glColorMask

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GLCOLORMASK(3G)						      GLCOLORMASK(3G)



NAME
       glColorMask  - enable and disable writing of frame buffer color compo-
       nents


C SPECIFICATION
       void glColorMask( GLboolean red,
			 GLboolean green,
			 GLboolean blue,
			 GLboolean alpha )


PARAMETERS
       red, green, blue, alpha
			     Specify whether red, green, blue, and alpha  can
			     or cannot be written into the frame buffer.  The
			     initial values are all GL_TRUE, indicating	 that
			     the color components can be written.

DESCRIPTION
       glColorMask  specifies  whether the individual color components in the
       frame buffer can or cannot be written.  If red is GL_FALSE, for	exam-
       ple, no change is made to the red component of any pixel in any of the
       color buffers, regardless of the drawing operation attempted.

       Changes	to  individual	bits  of  components  cannot  be  controlled.
       Rather, changes are either enabled or disabled for entire color compo-
       nents.

ERRORS
       GL_INVALID_OPERATION is generated if glColorMask is  executed  between
       the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_COLOR_WRITEMASK
       glGet with argument GL_RGBA_MODE

SEE ALSO
       glClear(3G),    glColor(3G),    glColorPointer(3G),   glDepthMask(3G),
       glIndex(3G), glIndexPointer(3G), glIndexMask(3G), glStencilMask(3G)



							      GLCOLORMASK(3G)