Gl.IndexMask (gb.opengl)
Static Sub IndexMask ( Mask As Integer )
Control the writing of individual bits in the color index buffers.
Parameters
- 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.
Description
Gl.IndexMask controls the writing of individual bits in the color index buffers.
The least significant
bits of
mask,
where
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
Gl.DrawBuffer).
Initially, all bits are enabled for writing.
Errors
Gl.INVALID_OPERATION is generated if
Gl.IndexMask
is executed between the execution of Gl.Begin
and the corresponding execution of Gl.End.
Associated Gets
Gl.Get with argument Gl.INDEX_WRITEMASK
See also
Gl.Index,
Gl.IndexPointer,