Glindexmask - HP b2600 Reference Manual

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glIndexMask

glIndexMask
glIndexMask: control the writing of individual bits in the color index buffers.
C Specification
void glIndexMask(
Parameters
mask
Description
glIndexMask controls the writing of individual bits in the color index buffers. The least
significant n bits of mask, where n is the number of bits in a color index buffer, specify a
mask. Where a 1 (one) appears in the mask, it's possible to write to the corresponding bit
in the color index buffer (or buffers). Where a 0 (zero) appears, the corresponding bit is
write-protected.
This mask is used only in color index mode, and it affects only the buffers currently
selected for writing (see glDrawBuffer). Initially, all bits are enabled for writing.
Errors
•
Associated Gets
glGet with argument GL_INDEX_WRITEMASK
See Also
glColorMask,
glDepthMask,
glDrawBuffer,
glIndex,
glIndexPointer,
glStencilMask
232
GLuint mask)
Specifies a bit mask to enable and disable the writing of individual bits
in the color index buffers. Initially, the mask is all 1's.
GL_INVALID_OPERATION is generated if glIndexMask is executed between the
execution of glBegin and the corresponding execution of glEnd.
Chapter 9