Digital Equipment Corporation OpenGL man pages



  glColorMask -	enable and disable writing of frame buffer color components

C Specification

  void glColorMask( 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 frame buffer.  The default
			values are all GL_TRUE,	indicating that	the color
			components can be written.


  glColorMask specifies	whether	the individual color components	in the frame
  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 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 components.


  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

  glColor, glIndex, glIndexMask, glDepthMask, glStencilMask

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Last Edited: Fri Dec 6 11:18:03 EST 1996 by AFV
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