- enable and disable writing of frame buffer color compo-
nents
C SPECIFICATION
PARAMETERS
_param1, _param2, _param3, _param4
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 compo-
nents in the frame buffer can or cannot be written. If
_param1 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 con-
trolled. Rather, changes are either enabled or disabled
for entire color components.
ERRORS
GL_INVALID_OPERATION is generated if glColorMask is exe-
cuted between the execution of glBegin and the correspond-
ing execution of glEnd.
ASSOCIATED GETS
glGet with argument GL_COLOR_WRITEMASK
glGet with argument GL_RGBA_MODE
SEE ALSO
glClear, glColor, glColorPointer, glDepthMask, glIndex,
glIndexPointer, glIndexMask, glStencilMask
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