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
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 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
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, glColor, glColorPointer, glDepthMask, glIndex, glIndexPointer,
glIndexMask, glStencilMask
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