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<STRONG>NAME</STRONG>
<STRONG>glColorMask</STRONG> - enable and disable writing of frame buffer
color components
<STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
void <STRONG>glColorMask</STRONG>( GLboolean <EM>red</EM>,
GLboolean <EM>green</EM>,
GLboolean <EM>blue</EM>,
GLboolean <EM>alpha</EM> )
<STRONG>PARAMETERS</STRONG>
<EM>red</EM>, <EM>green</EM>, <EM>blue</EM>, <EM>alpha</EM>
Specify whether red, green, blue, and
alpha can or cannot be written into
the frame buffer. The initial values
are all <STRONG>GL_TRUE</STRONG>, indicating that the
color components can be written.
<STRONG>DESCRIPTION</STRONG>
<STRONG>glColorMask</STRONG> specifies whether the individual color
components in the frame buffer can or cannot be written. If
<EM>red</EM> is <STRONG>GL_FALSE</STRONG>, 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.
<STRONG>ERRORS</STRONG>
<STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glColorMask</STRONG> is executed
between the execution of <STRONG>glBegin</STRONG> and the corresponding
execution of <STRONG>glEnd</STRONG>.
<STRONG>ASSOCIATED</STRONG> <STRONG>GETS</STRONG>
<STRONG>glGet</STRONG> with argument <STRONG>GL_COLOR_WRITEMASK</STRONG>
<STRONG>glGet</STRONG> with argument <STRONG>GL_RGBA_MODE</STRONG>
<STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>
<STRONG>glColor</STRONG>, <STRONG>glColorPointer</STRONG>, <STRONG>glDepthMask</STRONG>, <STRONG>glIndex</STRONG>,
<STRONG>glIndexPointer</STRONG>, <STRONG>glIndexMask</STRONG>, <STRONG>glStencilMask</STRONG>
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