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Manual Reference Pages  - GLCOLORMASK (3G)

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glColorMask - enable and disable writing of frame buffer color components

CONTENTS

C Specification
Parameters
Description
Errors
Associated Gets
See Also

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 initial 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.

 glGet with argument  GL_COLOR_WRITEMASK
 glGet with argument  GL_RGBA_MODE

 glClear(3G),  glColor(3G),  glColorPointer(3G),  glDepthMask(3G),  glIndex(3G),  glIndexPointer(3G),  glIndexMask(3G),  glStencilMask(3G)

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