glcolormask(3G) — IRIX 6.5.3f



glColorMask(3G)                OpenGL Reference                glColorMask(3G)



NAME
     glColorMask - enable and disable writing of frame buffer color components


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
                           default values are all GLTRUE, 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 GLFALSE, 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.

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

ASSOCIATED GETS
     glGet with argument GLCOLORWRITEMASK
     glGet with argument GLRGBAMODE


SEE ALSO
     glColor, glIndex, glIndexMask, glDepthMask, glStencilMask

















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